path: root/test/tsohm.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Purpose:     Test Shared Object Header Messages
 */

#include "testhdf5.h"

/*
 * This file needs to access private information from the H5F package.
 * This file also needs to access the file testing code.
 */
#define H5F_FRIEND /* suppress error about including H5Fpkg      */
#define H5F_TESTING
#include "H5Fpkg.h" /* File access */

/* Default SOHM values */
#define DEF_NUM_INDEXES 0
static const unsigned def_type_flags[H5O_SHMESG_MAX_NINDEXES] = {0, 0, 0, 0, 0, 0};
static const unsigned def_minsizes[H5O_SHMESG_MAX_NINDEXES]   = {250, 250, 250, 250, 250, 250};
#define DEF_L2B 50
#define DEF_B2L 40

/* Non-default SOHM values for testing */
#define TEST_NUM_INDEXES 4
static const unsigned test_type_flags[H5O_SHMESG_MAX_NINDEXES] = {H5O_SHMESG_FILL_FLAG,
                                                                  H5O_SHMESG_DTYPE_FLAG |
                                                                      H5O_SHMESG_ATTR_FLAG,
                                                                  H5O_SHMESG_SDSPACE_FLAG,
                                                                  H5O_SHMESG_PLINE_FLAG,
                                                                  0,
                                                                  0};
static const unsigned test_minsizes[H5O_SHMESG_MAX_NINDEXES]   = {0, 2, 40, 100, 3, 1000};
#define TEST_L2B 65
#define TEST_B2L 64

#define FILENAME     "tsohm.h5"
#define FILENAME_SRC "tsohm_src.h5"
#define FILENAME_DST "tsohm_dst.h5"

#define NAME_BUF_SIZE 512

/* How much overhead counts as "not much" when converting B-trees, etc. */
#define OVERHEAD_ALLOWED 1.15F

#define NUM_DATASETS   10
#define NUM_ATTRIBUTES 100

typedef struct dtype1_struct {
    int   i1;
    char  str[10];
    int   i2;
    int   i3;
    int   i4;
    int   i5;
    int   i6;
    int   i7;
    int   i8;
    float f1;
} dtype1_struct;

#define DTYPE2_SIZE 1024
static const char *DSETNAME[]       = {"dataset0",  "dataset1",  "dataset2", "dataset3", "dataset4",
                                 "dataset5",  "dataset6",  "dataset7", "dataset8", "dataset9",
                                 "dataset10", "dataset11", NULL};
static const char *EXTRA_DSETNAME[] = {"ex_dataset0",  "ex_dataset1",  "ex_dataset2",
                                       "ex_dataset3",  "ex_dataset4",  "ex_dataset5",
                                       "ex_dataset6",  "ex_dataset7",  "ex_dataset8",
                                       "ex_dataset9",  "ex_dataset10", "ex_dataset11",
                                       "ex_dataset12", "ex_dataset13", "ex_dataset14",
                                       "ex_dataset15", "ex_dataset16", "ex_dataset17",
                                       "ex_dataset18", "ex_dataset19", NULL};
#define SOHM_HELPER_NUM_EX_DSETS 20
typedef struct complex_t {
    double re;
    double im;
} complex_t;
#define ENUM_NUM_MEMBS 20
static const char *ENUM_NAME[] = {"enum_member0",  "enum_member1",  "enum_member2",
                                  "enum_member3",  "enum_member4",  "enum_member5",
                                  "enum_member6",  "enum_member7",  "enum_member8",
                                  "enum_member9",  "enum_member10", "enum_member11",
                                  "enum_member12", "enum_member13", "enum_member14",
                                  "enum_member15", "enum_member16", "enum_member17",
                                  "enum_member18", "enum_member19", NULL};
static const int   ENUM_VAL[]  = {0, 13,  -500,  63,  64,  -64,  65,  2048,  1,  2,     -1,
                               7, 130, -5000, 630, 640, -640, 650, 20480, 10, -1001, -10};
#define SIZE2_RANK1 6
#define SIZE2_RANK2 10
#define SIZE2_DIMS                                                                                           \
    {                                                                                                        \
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10                                                                        \
    }

#define LONG_STRING                                                                                          \
    "00 index.  A long string used for testing. To create new strings, set the first two characters to be "  \
    "some ASCII number other than 00, such as 01."

/* Struct returned from size2_helper function */
typedef struct size2_helper_struct {
    h5_stat_size_t empty_size;
    h5_stat_size_t first_dset;
    h5_stat_size_t second_dset;
    h5_stat_size_t dsets1;
    h5_stat_size_t dsets2;
    h5_stat_size_t interleaved;
    h5_stat_size_t attrs1;
    h5_stat_size_t attrs2;
} size2_helper_struct;

/* Number of distinct messages for the sohm_delete test */
#define DELETE_NUM_MESGS      7
#define HALF_DELETE_NUM_MESGS 3
#define DELETE_DIMS                                                                                          \
    {                                                                                                        \
        1, 1, 1, 1, 1, 1, 1                                                                                  \
    }
#define DELETE_MIN_MESG_SIZE 10
#define DELETE_MAX_MESG_SIZE 60

/* Number of dimensions in extend_dset test */
#define EXTEND_NDIMS 2

/* Dimensions for external_dtype test */
#define NX 10
#define NY 10

/* Helper function prototypes */
static hid_t make_dtype_1(void);
static hid_t make_dtype_2(void);
static hid_t close_reopen_file(hid_t file, const char *filename, hid_t fapl_id);
static void  test_sohm_attrs(void);
#ifdef NOT_NOW
static void size2_dump_struct(const char *name, size2_helper_struct *sizes);
#endif /* NOT_NOW */
static void size2_verify(void);
static void test_sohm_delete(void);
static void test_sohm_delete_revert(void);
static void test_sohm_extlink(void);

/****************************************************************
**
**  verify_fcpl_values(): Verifies that FCPL is set as expected.
**
****************************************************************/
static void
verify_fcpl_values(hid_t fcpl_id, const unsigned nindexes_expected, const unsigned *flags_expected,
                   const unsigned *minsizes_expected, unsigned l2b, unsigned b2l)
{
    unsigned nindexes_actual;
    unsigned list_size;
    unsigned btree_size;
    unsigned x;
    herr_t   ret;

    /* Number of indexes */
    ret = H5Pget_shared_mesg_nindexes(fcpl_id, &nindexes_actual);
    CHECK_I(ret, "H5Pget_shared_mesg_nindexes");
    VERIFY(nindexes_actual, nindexes_expected, "H5Pget_shared_mesg_nindexes");

    /* Index flags and minsizes */
    for (x = 0; x < nindexes_actual; ++x) {
        unsigned flags_i;
        unsigned min_mesg_size;
        ret = H5Pget_shared_mesg_index(fcpl_id, x, &flags_i, &min_mesg_size);
        CHECK_I(ret, "H5Pget_shared_mesg_index");
        VERIFY(flags_i, flags_expected[x], "H5Pget_shared_mesg_index");
        VERIFY(min_mesg_size, minsizes_expected[x], "H5Pget_shared_mesg_index");
    }

    /* List-to-btree and btree-to-list values */
    ret = H5Pget_shared_mesg_phase_change(fcpl_id, &list_size, &btree_size);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    VERIFY(list_size, l2b, "H5Pset_shared_mesg_phase_change");
    VERIFY(btree_size, b2l, "H5Pset_shared_mesg_phase_change");
} /* verify_fcpl_values */

/****************************************************************
**
**  test_sohm_fcpl(): Test File Creation Property Lists.
**
****************************************************************/
static void
test_sohm_fcpl(void)
{
    hid_t    fid      = H5I_INVALID_HID;
    hid_t    fcpl_id  = H5I_INVALID_HID;
    hid_t    fcpl2_id = H5I_INVALID_HID;
    unsigned x;
    herr_t   ret;

    MESSAGE(5, ("Testing File Creation Properties for Shared Messages\n"));

    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    verify_fcpl_values(fcpl_id, DEF_NUM_INDEXES, def_type_flags, def_minsizes, DEF_L2B, DEF_B2L);

    /* Create a file with this fcpl and make sure that all the values can be
     * retrieved.
     */
    fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(fid, "H5Fcreate");

    fcpl2_id = H5Fget_create_plist(fid);
    CHECK_I(fcpl2_id, "H5Fcreate");

    verify_fcpl_values(fcpl2_id, DEF_NUM_INDEXES, def_type_flags, def_minsizes, DEF_L2B, DEF_B2L);

    ret = H5Pclose(fcpl2_id);
    CHECK_I(ret, "H5Pclose");

    /* Close and re-open the file.  Make sure that fcpl values are still
     * correct.
     */
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");
    fid = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(fid, "H5Fopen");

    fcpl2_id = H5Fget_create_plist(fid);
    CHECK_I(ret, "H5Fcreate");

    verify_fcpl_values(fcpl2_id, DEF_NUM_INDEXES, def_type_flags, def_minsizes, DEF_L2B, DEF_B2L);

    /* Clean up */
    ret = H5Pclose(fcpl2_id);
    CHECK_I(ret, "H5Pclose");
    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");

    /* Start over with a non-default fcpl */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    /* Set up index values */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, TEST_NUM_INDEXES);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    for (x = 0; x < TEST_NUM_INDEXES; ++x) {
        ret = H5Pset_shared_mesg_index(fcpl_id, x, test_type_flags[x], test_minsizes[x]);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
    } /* end for */

    ret = H5Pset_shared_mesg_phase_change(fcpl_id, TEST_L2B, TEST_B2L);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    verify_fcpl_values(fcpl_id, TEST_NUM_INDEXES, test_type_flags, test_minsizes, TEST_L2B, TEST_B2L);

    /* Use the fcpl to create a file and get it back again */
    fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(fid, "H5Fcreate");
    fcpl2_id = H5Fget_create_plist(fid);
    CHECK_I(fcpl2_id, "H5Fcreate");

    verify_fcpl_values(fcpl2_id, TEST_NUM_INDEXES, test_type_flags, test_minsizes, TEST_L2B, TEST_B2L);

    ret = H5Pclose(fcpl2_id);
    CHECK_I(ret, "H5Pclose");

    /* Close and re-open the file.  Make sure that fcpl values are still
     * correct.
     */
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");
    fid = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(fid, "H5Fopen");

    fcpl2_id = H5Fget_create_plist(fid);
    CHECK_I(ret, "H5Fcreate");

    verify_fcpl_values(fcpl2_id, TEST_NUM_INDEXES, test_type_flags, test_minsizes, TEST_L2B, TEST_B2L);

    /* Clean up */
    ret = H5Pclose(fcpl2_id);
    CHECK_I(ret, "H5Pclose");
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");

    /* Actually, the list max can be exactly 1 greater than the
     * btree min, but no more.
     * Reset the second index.
     */
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, test_type_flags[1], 15);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 10, 11);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(fid, "H5Fcreate");
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");

    /* Test edge cases:
     * H5O_SHMESG_MAX_NINDEXES and H5O_SHMESG_MAX_LIST_SIZE should be valid
     * values.
     * Creating a file with uninitialized indexes should work. (TODO: not implemented?)
     */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, H5O_SHMESG_MAX_NINDEXES);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, H5O_SHMESG_MAX_LIST_SIZE, H5O_SHMESG_MAX_LIST_SIZE);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(fid, "H5Fcreate");

    /* Clean up */
    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");
    ret = H5Fclose(fid);
    CHECK_I(ret, "H5Fclose");
} /* test_sohm_fcpl */

/****************************************************************
**
**  test_sohm_fcpl_errors(): Test bogus FCPL settings for SOHMs
**
****************************************************************/
static void
test_sohm_fcpl_errors(void)
{
    hid_t    fcpl_id = H5I_INVALID_HID;
    hid_t    fid     = H5I_INVALID_HID;
    unsigned x;
    herr_t   ret;

    MESSAGE(5, ("Testing bogus file creation properties for shared messages\n"));

    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    /* Set up index values */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, TEST_NUM_INDEXES);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    for (x = 0; x < TEST_NUM_INDEXES; ++x) {
        ret = H5Pset_shared_mesg_index(fcpl_id, x, test_type_flags[x], test_minsizes[x]);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
    }

    ret = H5Pset_shared_mesg_phase_change(fcpl_id, TEST_L2B, TEST_B2L);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    verify_fcpl_values(fcpl_id, TEST_NUM_INDEXES, test_type_flags, test_minsizes, TEST_L2B, TEST_B2L);

    H5E_BEGIN_TRY
    {
        /* Trying to create too many indexes should fail */
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, H5O_SHMESG_MAX_NINDEXES + 1);
        VERIFY(ret, -1, "H5Pset_shared_mesg_nindexes");

        /* Trying to set index to an index higher than the current number
         * of indexes should fail.
         */
        ret = H5Pset_shared_mesg_index(fcpl_id, H5O_SHMESG_MAX_NINDEXES, 0, 15);
        VERIFY(ret, -1, "H5Pset_shared_mesg_index");
        ret = H5Pset_shared_mesg_index(fcpl_id, TEST_NUM_INDEXES, 0, 15);
        VERIFY(ret, -1, "H5Pset_shared_mesg_index");

        /* Setting an unknown flag (all flags + 1) should fail */
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_ALL_FLAG + 1, 15);
        VERIFY(ret, -1, "H5Pset_shared_mesg_index");

        /* Try setting two different indexes to hold fill messages.  They
         * should hold even very small messages for testing, even though we
         * wouldn't really want to share such tiny messages in the real world.
         */
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_FILL_FLAG, 15);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_FILL_FLAG, 15);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
        fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
        VERIFY(fid, -1, "H5Fcreate");
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_DTYPE_FLAG | H5O_SHMESG_FILL_FLAG, 15);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
        fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
        VERIFY(fid, -1, "H5Fcreate");

        /* Test list/btree cutoffs.  We can set these to any positive value,
         * but if the list max is less than the btree min we'll get an error
         * when the file is created.
         */
        ret = H5Pset_shared_mesg_phase_change(fcpl_id, 10, 12);
        VERIFY(ret, -1, "H5Pset_shared_mesg_phase_change");
        /* Setting them to extremely large values should also fail */
        ret = H5Pset_shared_mesg_phase_change(fcpl_id, H5O_SHMESG_MAX_LIST_SIZE + 1, 0);
        VERIFY(ret, -1, "H5Pset_shared_mesg_phase_change");
        ret = H5Pset_shared_mesg_phase_change(fcpl_id, 10, H5O_SHMESG_MAX_LIST_SIZE + 10);
        VERIFY(ret, -1, "H5Pset_shared_mesg_phase_change");
        ret =
            H5Pset_shared_mesg_phase_change(fcpl_id, H5O_SHMESG_MAX_LIST_SIZE, H5O_SHMESG_MAX_LIST_SIZE + 1);
        VERIFY(ret, -1, "H5Pset_shared_mesg_phase_change");
    }
    H5E_END_TRY
} /* test_sohm_fcpl_errors */

/*-------------------------------------------------------------------------
 * Function:    make_dtype_1
 *
 * Purpose:     Creates a complicated datatype for use in testing
 *              shared object header messages. The important thing is that
 *              the datatypes must take a lot of space to store on disk.
 *
 * Return:      Success:        datatype ID (should be closed by calling function)
 *              Failure:        negative
 *
 *-------------------------------------------------------------------------
 */
static hid_t
make_dtype_1(void)
{
    hid_t dtype1_id = H5I_INVALID_HID;
    hid_t str_id    = H5I_INVALID_HID;

    /* Create compound datatype. */
    if ((dtype1_id = H5Tcreate(H5T_COMPOUND, sizeof(struct dtype1_struct))) < 0)
        TEST_ERROR;

    if (H5Tinsert(dtype1_id, "i1", HOFFSET(dtype1_struct, i1), H5T_NATIVE_INT) < 0)
        TEST_ERROR;

    str_id = H5Tcopy(H5T_C_S1);
    if (H5Tset_size(str_id, (size_t)10) < 0)
        TEST_ERROR;

    if (H5Tinsert(dtype1_id, "string", HOFFSET(dtype1_struct, str), str_id) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i2", HOFFSET(dtype1_struct, i2), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i3", HOFFSET(dtype1_struct, i3), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i4", HOFFSET(dtype1_struct, i4), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i5", HOFFSET(dtype1_struct, i5), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i6", HOFFSET(dtype1_struct, i6), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i7", HOFFSET(dtype1_struct, i7), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "i8", HOFFSET(dtype1_struct, i8), H5T_NATIVE_INT) < 0)
        TEST_ERROR;
    if (H5Tinsert(dtype1_id, "f1", HOFFSET(dtype1_struct, f1), H5T_NATIVE_FLOAT) < 0)
        TEST_ERROR;

    if (H5Tclose(str_id) < 0)
        TEST_ERROR;

    return dtype1_id;

error:
    H5E_BEGIN_TRY
    {
        H5Tclose(str_id);
        H5Tclose(dtype1_id);
    }
    H5E_END_TRY
    return -1;
} /* make_dtype1 */

/*-------------------------------------------------------------------------
 * Function:    make_dtype_2
 *
 * Purpose:     Creates complicated datatypes for use in testing
 *              shared object header messages. The important thing is that
 *              the datatypes must take a lot of space to store on disk.
 *
 * Return:      Success:        datatype ID (should be closed by calling function)
 *              Failure:        negative
 *
 *-------------------------------------------------------------------------
 */
static hid_t
make_dtype_2(void)
{
    hid_t   dtype2_id = H5I_INVALID_HID;
    hid_t   enum_id   = H5I_INVALID_HID;
    hid_t   int_id    = H5I_INVALID_HID;
    int     x;
    hsize_t dims[] = {2, 1, 2, 4};
    size_t  size;

    /* Create an int with a strange precision */
    if ((int_id = H5Tcopy(H5T_NATIVE_INT)) < 0)
        TEST_ERROR;
    if (H5Tset_precision(int_id, (size_t)24) < 0)
        TEST_ERROR;

    /* Create an enumeration using that int */
    if ((enum_id = H5Tenum_create(int_id)) < 0)
        TEST_ERROR;

    for (x = 0; x < ENUM_NUM_MEMBS; x++)
        if (H5Tenum_insert(enum_id, ENUM_NAME[x], &ENUM_VAL[x]) < 0)
            TEST_ERROR;

    /* Create arrays of arrays of arrays of enums */
    if ((dtype2_id = H5Tarray_create2(enum_id, 3, dims)) < 0)
        TEST_ERROR;
    if ((dtype2_id = H5Tarray_create2(dtype2_id, 4, dims)) < 0)
        TEST_ERROR;
    if ((dtype2_id = H5Tarray_create2(dtype2_id, 2, dims)) < 0)
        TEST_ERROR;
    if ((dtype2_id = H5Tarray_create2(dtype2_id, 1, dims)) < 0)
        TEST_ERROR;

    if (H5Tclose(enum_id) < 0)
        TEST_ERROR;
    if (H5Tclose(int_id) < 0)
        TEST_ERROR;

    /* Check the datatype size.  If this is different than the #defined
     * size then the fills values will have the wrong size.
     */
    size = H5Tget_size(dtype2_id);
    if (size != DTYPE2_SIZE)
        TEST_ERROR;

    return dtype2_id;

error:
    H5E_BEGIN_TRY
    {
        H5Tclose(dtype2_id);
        H5Tclose(enum_id);
        H5Tclose(int_id);
    }
    H5E_END_TRY
    return -1;
} /* make_dtype2 */

/*-------------------------------------------------------------------------
 * Function:    close_reopen_file
 *
 * Purpose:     Closes a file and then reopens it.  Used to ensure that
 *              SOHMs are written to and read from disk
 *
 * Return:      Success:        new hid_t for the file
 *              Failure:        Negative
 *
 *-------------------------------------------------------------------------
 */
static hid_t
close_reopen_file(hid_t file, const char *filename, hid_t fapl_id)
{
    if (H5Fclose(file) < 0)
        FAIL_STACK_ERROR;
    file = H5Fopen(filename, H5F_ACC_RDWR, fapl_id);
    if (file < 0)
        FAIL_STACK_ERROR;
    return (file);

error:
    return -1;
} /* close_reopen_file */

/*-------------------------------------------------------------------------
 * Function:    size1_helper
 *
 * Purpose:     Creates object headers that use a large datatype message.
 *
 *              Set test_file_closing to true to add file closing and reopening
 *              whenever possible (to test that SOHMs are written correctly
 *              on disk and not just in memory).
 *
 * Return:      Success:    file ID (may not be the same one passed in)
 *              Failure:    H5I_INVALID_HID
 *
 *-------------------------------------------------------------------------
 */
static hid_t
size1_helper(hid_t file, const char *filename, hid_t fapl_id, bool test_file_closing)
{
    dtype1_struct wdata;
    dtype1_struct rdata;
    hid_t         dtype1_id = H5I_INVALID_HID;
    hid_t         space_id  = H5I_INVALID_HID;
    hid_t         dset_id   = H5I_INVALID_HID;
    hsize_t       dim1[1];
    int           x;

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 * Macro:      TSOHM_S1H_VERIFY_DATA
 *
 * Purpose:    Encapsulate a common pattern:
 *             Reads the dataset and verifies that [a subset of] the data
 *             are as expected.
 *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 */
#define TSOHM_S1H_VERIFY_DATA(dset_id, dtype_id)                                                             \
    {                                                                                                        \
        memset(&rdata, 0, sizeof(rdata));                                                                    \
        if (0 > H5Dread((dset_id), (dtype_id), H5S_ALL, H5S_ALL, H5P_DEFAULT, &rdata)) {                     \
            H5_FAILED();                                                                                     \
            AT();                                                                                            \
            printf("Can't read data\n");                                                                     \
            goto error;                                                                                      \
        }                                                                                                    \
        if ((rdata.i1 != wdata.i1) || (rdata.i2 != wdata.i2) || strcmp(rdata.str, wdata.str) != 0) {         \
            H5_FAILED();                                                                                     \
            AT();                                                                                            \
            printf("incorrect read data\n");                                                                 \
            goto error;                                                                                      \
        }                                                                                                    \
    } /* TSOHM_S1H_VERIFY_DATA() definition */

    /* Closing and re-opening the file takes a long time on systems without
     * local disks.  Don't close and reopen if express testing is enabled.
     */
    if (GetTestExpress() > 1)
        test_file_closing = false;

    /* Initialize wdata */
    memset(&wdata, 0, sizeof(wdata));
    wdata.i1 = 11;
    strcpy(wdata.str, "string");
    wdata.i2 = 22;
    wdata.i3 = 33;
    wdata.i4 = 44;
    wdata.i5 = 55;
    wdata.i6 = 66;
    wdata.i7 = 77;
    wdata.i8 = 88;
    wdata.f1 = 0.0F;

    /* Initialize rdata */
    memset(&rdata, 0, sizeof(rdata));

    dtype1_id = make_dtype_1();
    if (dtype1_id < 0)
        TEST_ERROR;

    dim1[0]  = 1;
    space_id = H5Screate_simple(1, dim1, NULL);
    if (space_id < 0)
        TEST_ERROR;

    dset_id = H5Dcreate2(file, DSETNAME[0], dtype1_id, space_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    if (dset_id < 0)
        FAIL_STACK_ERROR;

    /* Test writing and reading */
    if (H5Dwrite(dset_id, dtype1_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, &wdata) < 0)
        FAIL_STACK_ERROR;
    TSOHM_S1H_VERIFY_DATA(dset_id, dtype1_id)
    if (H5Dclose(dset_id) < 0)
        FAIL_STACK_ERROR;

    if (test_file_closing)
        if ((file = close_reopen_file(file, filename, fapl_id)) < 0)
            TEST_ERROR;

    /* Create 3 more datasets with the same datatype/dataspace */
    for (x = 1; x < 4; x++) {
        dset_id = H5Dcreate2(file, DSETNAME[x], dtype1_id, space_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        if (0 > dset_id)
            FAIL_STACK_ERROR;
        if (x == 3)
            if (H5Dwrite(dset_id, dtype1_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, &wdata) < 0)
                TEST_ERROR;
        if (H5Dclose(dset_id) < 0)
            FAIL_STACK_ERROR;

        if (test_file_closing)
            if ((file = close_reopen_file(file, filename, fapl_id)) < 0)
                TEST_ERROR;
    }

    if (H5Tclose(dtype1_id) < 0)
        TEST_ERROR;

    /* Make sure the data has been written successfully */
    dset_id = H5Dopen2(file, DSETNAME[0], H5P_DEFAULT);
    if (dset_id < 0)
        TEST_ERROR;
    dtype1_id = H5Dget_type(dset_id);
    if (dtype1_id < 0)
        TEST_ERROR;
    TSOHM_S1H_VERIFY_DATA(dset_id, dtype1_id)

    if (H5Dclose(dset_id) < 0)
        TEST_ERROR;

    /* Create several copies of the dataset
     * this increases the amount of space saved by sharing the datatype message
     */
    for (x = 0; x < SOHM_HELPER_NUM_EX_DSETS; x++) {
        dset_id =
            H5Dcreate2(file, EXTRA_DSETNAME[x], dtype1_id, space_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        if (dset_id < 0)
            TEST_ERROR;
        if (H5Dclose(dset_id) < 0)
            TEST_ERROR;

        if (test_file_closing)
            if ((file = close_reopen_file(file, filename, fapl_id)) < 0)
                TEST_ERROR;
    }

    if (H5Tclose(dtype1_id) < 0)
        TEST_ERROR;
    if (H5Sclose(space_id) < 0)
        TEST_ERROR;

    /* Ensure that we can still read data back from dataset 3 */
    dset_id = H5Dopen2(file, DSETNAME[3], H5P_DEFAULT);
    if (dset_id < 0)
        TEST_ERROR;
    dtype1_id = H5Dget_type(dset_id);
    if (dtype1_id < 0)
        TEST_ERROR;
    TSOHM_S1H_VERIFY_DATA(dset_id, dtype1_id)

    if (H5Dclose(dset_id) < 0)
        TEST_ERROR;
    if (H5Tclose(dtype1_id) < 0)
        TEST_ERROR;

    return file;

error:
    H5E_BEGIN_TRY
    {
        H5Sclose(space_id);
        H5Tclose(dtype1_id);
        H5Dclose(dset_id);
        H5Fclose(file);
    }
    H5E_END_TRY

    return H5I_INVALID_HID;
#undef TSOHM_S1H_VERIFY_DATA /* macro is exclusive to this function */
} /* size1_helper */

/*----------------------------------------------------------------------------
 * Function: getsize_testsize1
 *
 * Purpose: Creates a test file, populates it, and returns its file size.
 *          Object header information from the "first" dataset in the file
 *          is stored in pointer `oinfo`.
 *
 *----------------------------------------------------------------------------
 */
static h5_stat_size_t
getsize_testsize1(const char *filename, hid_t fcpl_id, hid_t fapl_id, bool test_file_closing,
                  H5O_native_info_t *ninfo)
{
    hid_t  fid = H5I_INVALID_HID;
    herr_t ret;

    fid = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl_id, fapl_id);
    CHECK(fid, H5I_INVALID_HID, "H5Fcreate");

    /* If test_file_closing is true, you will get back a different ID,
     * which will need to be closed. The helper will close your passed-in
     * ID.
     */
    fid = size1_helper(fid, filename, fapl_id, test_file_closing);
    CHECK(fid, H5I_INVALID_HID, "size1_helper");

    ret = H5Oget_native_info_by_name(fid, DSETNAME[0], ninfo, H5O_NATIVE_INFO_HDR, H5P_DEFAULT);
    CHECK(ret, FAIL, "H5Oget_native_info_by_name");

    ret = H5Fclose(fid);
    CHECK(ret, FAIL, "H5Fclose");

    return h5_get_file_size(filename, fapl_id);
} /* getsize_testsize1() */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_size1
 *
 * Purpose:     Tests shared object header messages with a large datatype
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_size1(void)
{
    hid_t file    = H5I_INVALID_HID;
    hid_t fcpl_id = H5I_INVALID_HID;
    hid_t fapl_id = H5I_INVALID_HID;

    unsigned       use_shared = 0;
    unsigned       use_btree  = 0;
    h5_stat_size_t file_sizes[9];
    unsigned       size_index = 0;
    hsize_t        oh_sizes[3];
    unsigned       oh_size_index = 0;

#if 0  /* TBD: lying comment or bug. See Jira HDFFV-10646 */
    hsize_t        norm_oh_size;
#endif /* Jira HDFFV-10646 */
    hsize_t        sohm_oh_size;
    hsize_t        sohm_btree_oh_size;
    h5_stat_size_t norm_empty_filesize;
    h5_stat_size_t sohm_empty_filesize;
    h5_stat_size_t sohm_btree_empty_filesize;
    h5_stat_size_t norm_final_filesize;
    h5_stat_size_t sohm_final_filesize;
    h5_stat_size_t sohm_btree_final_filesize;
    h5_stat_size_t norm_final_filesize2;
    h5_stat_size_t sohm_final_filesize2;
    h5_stat_size_t sohm_btree_final_filesize2;

    H5O_native_info_t ninfo;
    unsigned          num_indexes   = 1;
    unsigned          index_flags   = H5O_SHMESG_DTYPE_FLAG;
    unsigned          min_mesg_size = 50;
    unsigned          list_max      = 11;
    unsigned          btree_min     = 10;
    herr_t            ret;

    MESSAGE(5, ("Testing that shared datatypes save space\n"));

    /* Create a FAPL with "semi" close degree, to detect dangling IDs */
    fapl_id = H5Pcreate(H5P_FILE_ACCESS);
    CHECK_I(fapl_id, "H5Pcreate");
    ret = H5Pset_fclose_degree(fapl_id, H5F_CLOSE_SEMI);
    CHECK_I(ret, "H5Pset_fclose_degree");

    /* ----------------------------------------
     * Run operations, accumulating file sizes to compare later.
     */

    for (use_shared = 0; use_shared < 2; use_shared++) {
        for (use_btree = 0; use_btree < 2; use_btree++) {
            bool test_open_close;

            /* cannot use btree indexing without shared messages; skip case */
            if (use_btree && !use_shared)
                continue;

            fcpl_id = H5Pcreate(H5P_FILE_CREATE);
            CHECK_I(fcpl_id, "H5Pcreate");

            if (use_shared) {
                /* Tests one index holding only datatype messages */
                ret = H5Pset_shared_mesg_nindexes(fcpl_id, num_indexes);
                CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
                ret = H5Pset_shared_mesg_index(fcpl_id, 0, index_flags, min_mesg_size);
                CHECK_I(ret, "H5Pset_shared_mesg_index");

                if (use_btree) {
                    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
                }
                else {
                    ret = H5Pset_shared_mesg_phase_change(fcpl_id, list_max, btree_min);
                }
                CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
            }
            else {
                ret = H5Pset_shared_mesg_nindexes(fcpl_id, 0);
                CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
            }

            file = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, fapl_id);
            CHECK_I(file, "H5Fcreate");
            ret = H5Fclose(file);
            CHECK_I(ret, "H5Fclose");

            /* size of empty file */
            file_sizes[size_index++] = h5_get_file_size(FILENAME, fapl_id);

            /* size of populated file, with different populating behaviors */
            test_open_close          = true;
            file_sizes[size_index++] = getsize_testsize1(FILENAME, fcpl_id, fapl_id, test_open_close, &ninfo);
            test_open_close          = false;
            file_sizes[size_index++] = getsize_testsize1(FILENAME, fcpl_id, fapl_id, test_open_close, &ninfo);
            oh_sizes[oh_size_index++] = ninfo.hdr.space.total;

            ret = H5Pclose(fcpl_id);
            CHECK_I(ret, "H5Pclose");
        } /* for btree/listed messages */
    }     /* for normal/shared messages */

    ret = H5Pclose(fapl_id);
    CHECK_I(ret, "H5Pclose");

    /* sanity-check state of arrays */
    VERIFY(9, size_index, "size_index");
    VERIFY(3, oh_size_index, "oh_size_index");

    /* ----------------------------------------
     * Check that all sizes make sense.
     */

    /* Put result sizes into human-readable symbolic names.
     * Order dependent on loop execution above.
     */
    norm_empty_filesize  = file_sizes[0];
    norm_final_filesize  = file_sizes[1];
    norm_final_filesize2 = file_sizes[2];
#if 0  /* TBD: lying comment or bug. See Jira HDFFV-10646 */
    norm_oh_size = oh_sizes[0];
#endif /* Jira HDFFV-10646 */

    sohm_empty_filesize  = file_sizes[3];
    sohm_final_filesize  = file_sizes[4];
    sohm_final_filesize2 = file_sizes[5];
    sohm_oh_size         = oh_sizes[1];

    sohm_btree_empty_filesize  = file_sizes[6];
    sohm_btree_final_filesize  = file_sizes[7];
    sohm_btree_final_filesize2 = file_sizes[8];
    sohm_btree_oh_size         = oh_sizes[2];

    /* How the SOHM messages are stored shouldn't affect the
     * size of the object header.
     */
    VERIFY(sohm_btree_oh_size, sohm_oh_size, "H5Oget_info_by_name");

#if 0  /* TBD: lying comment or bug. See Jira HDFFV-10646 */
    /* Object headers in SOHM files should be smaller than normal object
     * headers.
     */
    if (sohm_oh_size >= norm_oh_size)
        VERIFY(norm_oh_size, 1, "H5Oget_info_by_name");
#endif /* Jira HDFFV-10646 */

    /* Both sohm files should be bigger than a normal file when empty.
     * It's hard to say whether a B-tree with no nodes allocated should be
     * smaller than a list with SOHM_HELPER_NUM_DTYPES elements.
     * The sizes here shouldn't really be 1; it's just used to ensure that the
     * error code triggers.
     */
    if (sohm_empty_filesize <= norm_empty_filesize)
        VERIFY(sohm_empty_filesize, 1, "h5_get_file_size");

    if (sohm_btree_empty_filesize <= norm_empty_filesize)
        VERIFY(sohm_btree_empty_filesize, 1, "h5_get_file_size");

    /* When full, the sohm btree file should be smaller than the normal file.
     * The sohm list file should be at least as small, since it doesn't need
     * the overhead of a B-tree.
     */
    if (sohm_btree_final_filesize >= norm_final_filesize)
        VERIFY(sohm_btree_final_filesize, 1, "h5_get_file_size");
    if (sohm_final_filesize > sohm_btree_final_filesize)
        VERIFY(sohm_final_filesize, 1, "h5_get_file_size");

    /* Comparative sizes shouldn't change even if we open and close the file
     */
    if (sohm_btree_final_filesize2 >= norm_final_filesize2)
        VERIFY(sohm_btree_final_filesize2, 1, "h5_get_file_size");
    if (sohm_final_filesize2 > sohm_btree_final_filesize2)
        VERIFY(sohm_final_filesize2, 1, "h5_get_file_size");

} /* test_sohm_size1 */

/*---------------------------------------------------------------------------
 * Function:    test_sohm_size_consistency_open_create
 *
 * Purpose:     Tests that header size is different depending on file open
 *              procedure?
 *              Uses "size1_helper" for file setup directed to a specific
 *              file handle.
 *
 *---------------------------------------------------------------------------
 */
#if 0  /* TODO: REVEALS BUG TO BE FIXED - SEE JIRA HDFFV-10645 */
static void
test_sohm_size_consistency_open_create(void)
{
    hid_t       file = H5I_INVALID_HID;
    hid_t       fcpl_id = H5I_INVALID_HID;
    hid_t       fapl_id = H5I_INVALID_HID;
    unsigned    use_btree;
    hsize_t     oh_size_open;
    hsize_t     oh_size_create;
    H5O_native_info_t  oinfo;
    unsigned    num_indexes = 1;
    unsigned    index_flags = H5O_SHMESG_DTYPE_FLAG;
    unsigned    min_mesg_size = 50;
    unsigned    list_max = 11;
    unsigned    btree_min = 10;
    herr_t      ret;

    MESSAGE(5, \
    ("Testing that header size is consistent between H5Fopen and H5Fcreate\n"));

    /* Create a FAPL with "semi" close degree, to detect dangling IDs */
    fapl_id = H5Pcreate(H5P_FILE_ACCESS);
    CHECK_I(fapl_id, "H5Pcreate");
    ret = H5Pset_fclose_degree(fapl_id, H5F_CLOSE_SEMI);
    CHECK_I(ret, "H5Pset_fclose_degree");

    for (use_btree = 0; use_btree < 2; use_btree++) {
        /* Create FCPL with SOHMs enabled
         */
        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
        CHECK_I(fcpl_id, "H5Pcreate");
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, num_indexes);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, index_flags, min_mesg_size);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
        if (use_btree) {
            MESSAGE(5, ("----testing with btree index----\n"));
            ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
            CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
        } else {
            MESSAGE(5, ("----testing with normal index----\n"));
            ret = H5Pset_shared_mesg_phase_change(fcpl_id, list_max, btree_min);
            CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
        }

        /* Create empty file */
        file = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, fapl_id);
        CHECK_I(file, "H5Fcreate");
        ret = H5Fclose(file);
        CHECK_I(ret, "H5Fclose");

        /* Test Open/Write
         * Add messages to previously-created file */
        file = H5Fopen(FILENAME, H5F_ACC_RDWR, fapl_id);
        CHECK_I(file, "H5Fopen");
        file = size1_helper(file, FILENAME, fapl_id, false);
        CHECK_I(file, "size1_helper");

        /* Get the size of a dataset object header */
        ret = H5Oget_native_info_by_name(file, DSETNAME[0], &oinfo, H5O_NATIVE_INFO_HDR, H5P_DEFAULT);
        CHECK_I(ret, "H5Oget_native_info_by_name");
        oh_size_open = oinfo.hdr.space.total;

        ret = H5Fclose(file);
        CHECK_I(ret, "H5Fclose");

        /* Test Create/Write
         * Add messages to a newly-created file */
        file = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, fapl_id);
        CHECK_I(file, "H5Fcreate");
        file = size1_helper(file, FILENAME, fapl_id, false);
        CHECK_I(file, "size1_helper");

        /* Get the size of a dataset object header */
        ret = H5Oget_native_info_by_name(file, DSETNAME[0], &oinfo, H5O_NATIVE_INFO_HDR, H5P_DEFAULT);
        CHECK_I(ret, "H5Oget_native_info_by_name");
        oh_size_create = oinfo.hdr.space.total;

        ret = H5Fclose(file);
        CHECK_I(ret, "H5Fclose");

        VERIFY(oh_size_create, oh_size_open, "H5Oget_info_by_name2");

        ret = H5Pclose(fcpl_id);
        CHECK_I(ret, "H5Pclose");
    } /* for normal/btree indexing */

    ret = H5Pclose(fapl_id);
    CHECK_I(ret, "H5Pclose");
} /* test_sohm_size_consistency_open_create */
#endif /* Jira HDFFV-10645 */

/*-------------------------------------------------------------------------
 * Function:    sohm_attr_helper
 *
 * Purpose:     Given an fcpl, tests creating attributes with and without
 *              committed datatypes.
 *              Verify that an attribute can be written and read back.
 *              Tests attribute on a Group.
 *              Tests committed and non-committed datatypes.
 *              Tests attribute access through `H5Aopen()`.
 *
 *-------------------------------------------------------------------------
 */
static void
sohm_attr_helper(hid_t fcpl_id)
{
    hid_t    file_id;
    hid_t    space_id;
    hsize_t  dims     = 2;
    int      wdata[2] = {7, 42};
    int      rdata[2];
    herr_t   ret;
    size_t   x;
    unsigned op_index = 0;
#define TSOHM_SAH_OP_COUNT 3
    const char *groupnames[TSOHM_SAH_OP_COUNT] = {
        "group_for_nothing_special",
        "group_for_commited_dtype",
        "group_for_commited_dtype_and_other_ID_access",
    };

    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    space_id = H5Screate_simple(1, &dims, &dims);
    CHECK_I(space_id, "H5Screate_simple");

    /* loop:
     * 0 - nothing special
     * 1 - committed datatype
     * 2 - committed datatype, read through second ID
     */
    for (op_index = 0; op_index < TSOHM_SAH_OP_COUNT; op_index++) {
        hid_t type_id  = H5I_INVALID_HID;
        hid_t group_id = H5I_INVALID_HID;
        hid_t attr_id  = H5I_INVALID_HID;
        hid_t attr_id2 = H5I_INVALID_HID;
        hid_t attr_read_id;

        /* create group in file with name unique to op_index */
        group_id = H5Gcreate2(file_id, groupnames[op_index], H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(group_id, "H5Gcreate2");

        type_id = H5Tcopy(H5T_NATIVE_INT);
        CHECK_I(type_id, "H5Tcopy");

        /* Commit the datatype for the latter iterations.
         * Only do this ONCE.
         */
        if (op_index == 1) {
            ret = H5Tcommit2(file_id, "datatype", type_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
            CHECK_I(ret, "H5Tcommit2");
        }

        attr_id = H5Acreate2(group_id, "attribute", type_id, space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");

        if (op_index == 2) {
            /* Open the attribute to get another handle */
            attr_id2 = H5Aopen(group_id, "attribute", H5P_DEFAULT);
            CHECK_I(attr_id2, "H5Aopen");
        }

        ret = H5Awrite(attr_id, H5T_NATIVE_INT, wdata);
        CHECK_I(ret, "H5Awrite");

        ret = H5Gclose(group_id);
        CHECK_I(ret, "H5Gclose");
        ret = H5Tclose(type_id);
        CHECK_I(ret, "H5Tclose");

        /* Flush the file to force data to be written */
        ret = H5Fflush(file_id, H5F_SCOPE_GLOBAL);
        CHECK_I(ret, "H5Fflush");

        /* Verify */
        attr_read_id = (op_index == 2) ? attr_id2 : attr_id;
        memset(rdata, 0, sizeof(rdata));
        ret = H5Aread(attr_read_id, H5T_NATIVE_INT, rdata);
        CHECK_I(ret, "H5Aread");
        for (x = 0; x < (size_t)dims; ++x)
            VERIFY(rdata[x], wdata[x], "H5Aread");

        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");
        if (attr_id2 > -1) {
            ret = H5Aclose(attr_id2);
            CHECK_I(ret, "H5Aclose");
        }
    } /* for each attribute operation */

    ret = H5Sclose(space_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
#undef TSOHM_SAH_OP_COUNT
} /* sohm_attr_helper */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_attrs
 *
 * Purpose:     Attributes can be shared and can also contain shared
 *              datatype and dataspace messages.  Committed datatypes
 *              shouldn't be shared.
 *
 *              Test permutations of this.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_attrs(void)
{
    hid_t    bad_fid = H5I_INVALID_HID;
    hid_t    fcpl_id = H5I_INVALID_HID;
    unsigned i       = 0;
#define TSOHM_TSA_NFLAGS_1 7
    unsigned flags1[TSOHM_TSA_NFLAGS_1] = {
        H5O_SHMESG_ATTR_FLAG,
        H5O_SHMESG_SDSPACE_FLAG,
        H5O_SHMESG_DTYPE_FLAG,
        H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_SDSPACE_FLAG,
        H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG,
        H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_DTYPE_FLAG,
        H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG,
    };
#define TSOHM_TSA_NFLAGS_2 6
    unsigned flags2[TSOHM_TSA_NFLAGS_2][2] = {
        {
            H5O_SHMESG_ATTR_FLAG,
            H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG,
        },
        {
            H5O_SHMESG_SDSPACE_FLAG,
            H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_DTYPE_FLAG,
        },
        {
            H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_SDSPACE_FLAG,
        },
        {
            H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG,
        },
        {
            H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_SDSPACE_FLAG,
        },
        {
            H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_SDSPACE_FLAG,
            H5O_SHMESG_DTYPE_FLAG,
        },
    };
#define TSOHM_TSA_NFLAGS_3 5
    unsigned flags3[TSOHM_TSA_NFLAGS_3][3] = {
        {
            H5O_SHMESG_ATTR_FLAG,
            H5O_SHMESG_SDSPACE_FLAG,
            H5O_SHMESG_DTYPE_FLAG,
        },
        {
            H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG,
            H5O_SHMESG_SDSPACE_FLAG,
        },
        {
            H5O_SHMESG_SDSPACE_FLAG,
            H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG,
        },
        {
            0, /* first index does not hold a shared message type? */
            H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG,
        },
        {
            0, /* missing SDSPACE flag */
            H5O_SHMESG_DTYPE_FLAG,
            H5O_SHMESG_ATTR_FLAG,
        },
    };
    herr_t ret;

    MESSAGE(5, ("Testing that shared messages work with attributes\n"));

    /* No shared messages
     */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

    sohm_attr_helper(fcpl_id);

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");

    /* One shared message index
     */
    for (i = 0; i < TSOHM_TSA_NFLAGS_1; i++) {
        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
        CHECK_I(fcpl_id, "H5Pcreate");
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, flags1[i], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

        sohm_attr_helper(fcpl_id);

        ret = H5Pclose(fcpl_id);
        CHECK_I(ret, "H5Pclose");
    }

    /* two shared message indices
     */
    for (i = 0; i < TSOHM_TSA_NFLAGS_2; i++) {
        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
        CHECK_I(fcpl_id, "H5Pcreate");
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, flags2[i][0], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, flags2[i][1], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

        sohm_attr_helper(fcpl_id);

        ret = H5Pclose(fcpl_id);
        CHECK_I(ret, "H5Pclose");
    }

    /* duplicate flags in separate indices causes problems
     */
    H5E_BEGIN_TRY
    {
        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
        CHECK_I(fcpl_id, "H5Pcreate");
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ATTR_FLAG, 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_ATTR_FLAG, 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

        bad_fid = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
        VERIFY(bad_fid, H5I_INVALID_HID, "H5Fcreate");

        ret = H5Pclose(fcpl_id);
        CHECK_I(ret, "H5Pclose");
    }
    H5E_END_TRY

    /* three shared message indices
     */
    for (i = 0; i < TSOHM_TSA_NFLAGS_3; i++) {
        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
        CHECK_I(fcpl_id, "H5Pcreate");
        ret = H5Pset_shared_mesg_nindexes(fcpl_id, 3);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, flags3[i][0], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 1, flags3[i][1], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
        ret = H5Pset_shared_mesg_index(fcpl_id, 2, flags3[i][2], 2);
        CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

        sohm_attr_helper(fcpl_id);

        ret = H5Pclose(fcpl_id);
        CHECK_I(ret, "H5Pclose");
    }

#undef TSOHM_TSA_NFLAGS_1
#undef TSOHM_TSA_NFLAGS_2
#undef TSOHM_TSA_NFLAGS_3

} /* test_sohm_attrs */

/*-------------------------------------------------------------------------
 * Function:    size2_verify_plist1
 *
 * Purpose:     Verify that the property list passed in is in fact the
 *              same property list used as dcpl1_id in the size2 helper
 *              function.  This ensures that the filters can be read.
 *
 *-------------------------------------------------------------------------
 */
static void
size2_verify_plist1(hid_t plist)
{
    size_t        cd_nelmts;
    unsigned int  cd_value;
    char          name[NAME_BUF_SIZE];
    H5Z_filter_t  filter;
    hid_t         dtype1_id;
    dtype1_struct fill1;
    dtype1_struct fill1_correct;
    herr_t        ret;

    /* Hardcoded to correspond to dcpl1_id created in size2_helper */
    /* Check filters */
    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 0, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_SHUFFLE, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 1, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 1, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 2, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_SHUFFLE, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 3, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_FLETCHER32, "H5Pget_filter2");

    /* Check fill value */
    dtype1_id = make_dtype_1();
    CHECK_I(dtype1_id, "make_dtype_1");
    memset(&fill1_correct, '1', sizeof(fill1_correct));

    ret = H5Pget_fill_value(plist, dtype1_id, &fill1);
    CHECK_I(ret, "H5Pget_fill_value");

    ret = memcmp(&fill1, &fill1_correct, sizeof(fill1_correct));
    VERIFY(ret, 0, "memcmp");

    ret = H5Tclose(dtype1_id);
    CHECK_I(ret, "H5Tclose");
} /* size2_verify_plist1 */

/*-------------------------------------------------------------------------
 * Function:    size2_verify_plist2
 *
 * Purpose:     Verify that the property list passed in is in fact the
 *              same property list used as dcpl2_id in the size2 helper
 *              function.  This ensures that the filters can be read.
 *
 *-------------------------------------------------------------------------
 */
static void
size2_verify_plist2(hid_t plist)
{
    size_t       cd_nelmts;
    unsigned int cd_value;
    char         name[NAME_BUF_SIZE];
    H5Z_filter_t filter;
    hid_t        dtype2_id;
    char         fill2[DTYPE2_SIZE];
    char         fill2_correct[DTYPE2_SIZE];
    herr_t       ret;

    /* Hardcoded to correspond to dcpl1_id created in size2_helper */
    /* Check filters */
    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 0, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 1, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 1, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 2, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 2, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 2, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 3, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 1, "H5Pget_filter2");

    cd_nelmts = 1;
    filter    = H5Pget_filter2(plist, 4, NULL, &cd_nelmts, &cd_value, (size_t)NAME_BUF_SIZE, name, NULL);
    CHECK_I(filter, "H5Pget_filter2");
    VERIFY(filter, H5Z_FILTER_DEFLATE, "H5Pget_filter2");
    VERIFY(cd_value, 5, "H5Pget_filter2");

    /* Check fill value */
    dtype2_id = make_dtype_2();
    CHECK_I(dtype2_id, "make_dtype_2");
    memset(&fill2_correct, '2', (size_t)DTYPE2_SIZE);

    ret = H5Pget_fill_value(plist, dtype2_id, &fill2);
    CHECK_I(ret, "H5Pget_fill_value");

    ret = memcmp(&fill2, &fill2_correct, (size_t)DTYPE2_SIZE);
    VERIFY(ret, 0, "memcmp");

    ret = H5Tclose(dtype2_id);
    CHECK_I(ret, "H5Tclose");
} /* size2_verify_plist2 */

#ifdef NOT_NOW

/*-------------------------------------------------------------------------
 * Function:    size2_dump_struct
 *
 * Purpose:     A debugging function to print the contents of a
 *              size2_helper_struct (which holds the various sizes for a
 *              given file during the size2_helper function).
 *
 *-------------------------------------------------------------------------
 */
static void
size2_dump_struct(const char *name, size2_helper_struct *sizes)
{
    puts(name);
    printf("    empty size: %llu\n", (unsigned long long)sizes->empty_size);
    printf(" first dataset: %llu \tdelta: %llu\n", (unsigned long long)sizes->first_dset,
           (unsigned long long)(sizes->first_dset - sizes->empty_size));
    printf("second dataset: %llu \tdelta: %llu\n", (unsigned long long)sizes->second_dset,
           (unsigned long long)(sizes->second_dset - sizes->first_dset));
    printf("       dsets 1: %llu \tdelta: %llu\n", (unsigned long long)sizes->dsets1,
           (unsigned long long)(sizes->dsets1 - sizes->second_dset));
    printf("       dsets 2: %llu \tdelta: %llu\n", (unsigned long long)sizes->dsets2,
           (unsigned long long)(sizes->dsets2 - sizes->dsets1));
    printf("   interleaved: %llu \tdelta: %llu\n", (unsigned long long)sizes->interleaved,
           (unsigned long long)(sizes->interleaved - sizes->dsets2));
    printf("    attributes: %llu \tdelta: %llu\n", (unsigned long long)sizes->attrs1,
           (unsigned long long)(sizes->attrs1 - sizes->interleaved));
    printf("  attributes 2: %llu \tdelta: %llu\n", (unsigned long long)sizes->attrs2,
           (unsigned long long)(sizes->attrs2 - sizes->attrs1));
} /* size2_dump_struct */
#endif /* NOT_NOW */

/*-------------------------------------------------------------------------
 * Function:    size2_helper
 *
 * Purpose:     A helper function for test_sohm_size2.
 *
 *              Creates a file using the given fcpl, then creates lots
 *              of different kinds of messages within the file and
 *              returns the size of the file for comparison.
 *
 *              If test_file_closing is not zero, closes and re-opens
 *              the file after every write.
 *
 *              Doesn't close the property list.  Prints an error message
 *              if there's a failure, but doesn't alter its return value.
 *
 *-------------------------------------------------------------------------
 */
static int
size2_helper(hid_t fcpl_id, int test_file_closing, size2_helper_struct *ret_sizes)
{
    hid_t  file_id       = H5I_INVALID_HID;
    hid_t  dtype1_id     = H5I_INVALID_HID;
    hid_t  dtype2_id     = H5I_INVALID_HID;
    hid_t  dspace1_id    = H5I_INVALID_HID;
    hid_t  dspace2_id    = H5I_INVALID_HID;
    hid_t  dcpl1_id      = H5I_INVALID_HID;
    hid_t  dcpl2_id      = H5I_INVALID_HID;
    hid_t  dset_id       = H5I_INVALID_HID;
    hid_t  attr_type_id  = H5I_INVALID_HID;
    hid_t  attr_space_id = H5I_INVALID_HID;
    hid_t  attr_id       = H5I_INVALID_HID;
    hid_t  group_id      = H5I_INVALID_HID;
    char   attr_string1[NAME_BUF_SIZE];
    char   attr_string2[NAME_BUF_SIZE];
    char   attr_name[NAME_BUF_SIZE];
    int    x;
    herr_t ret;

    /* Constants used in this function */
    const int     rank1             = SIZE2_RANK1;
    const int     rank2             = SIZE2_RANK2;
    const hsize_t dims[SIZE2_RANK2] = SIZE2_DIMS;
    dtype1_struct fill1;
    char          fill2[DTYPE2_SIZE];

    /* Closing and re-opening the file takes a long time on systems without
     * local disks.  Don't close and reopen if express testing is enabled.
     */
    if (GetTestExpress() > 1)
        test_file_closing = 0;

    /* Create a file and get its size */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");

    /* Get the file size */
    ret_sizes->empty_size = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Re-open the file and set up messages to write */
    file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");

    /* Create two large datatype messages */
    dtype1_id = make_dtype_1();
    CHECK_I(dtype1_id, "make_dtype_1");
    dtype2_id = make_dtype_2();
    CHECK_I(dtype2_id, "make_dtype_2");

    /* Create some large dataspaces */
    dspace1_id = H5Screate_simple(rank1, dims, dims);
    CHECK_I(dspace1_id, "H5Screate_simple");
    dspace2_id = H5Screate_simple(rank2, dims, dims);
    CHECK_I(dspace2_id, "H5Screate_simple");

    /* fill1 and fill2 are fill values for the two datatypes.
     * We'll set them in the DCPL.
     */
    memset(&fill1, '1', sizeof(dtype1_struct));
    memset(&fill2, '2', (size_t)DTYPE2_SIZE);

    dcpl1_id = H5Pcreate(H5P_DATASET_CREATE);
    CHECK_I(dcpl1_id, "H5Pcreate");
    H5Pset_fill_value(dcpl1_id, dtype1_id, &fill1);

    dcpl2_id = H5Pcreate(H5P_DATASET_CREATE);
    CHECK_I(dcpl2_id, "H5Pcreate");
    H5Pset_fill_value(dcpl2_id, dtype2_id, &fill2);

    /* Filter messages we'll create by setting them in a DCPL. These
     * values don't need to make sense, they just need to take up space.
     */
    ret = H5Pset_chunk(dcpl1_id, rank1, dims);
    CHECK_I(ret, "H5Pset_chunk");
    ret = H5Pset_shuffle(dcpl1_id);
    CHECK_I(ret, "H5Pset_shuffle");
    ret = H5Pset_deflate(dcpl1_id, 1);
    CHECK_I(ret, "H5Pset_deflate");
    ret = H5Pset_shuffle(dcpl1_id);
    CHECK_I(ret, "H5Pset_shuffle");
    ret = H5Pset_fletcher32(dcpl1_id);
    CHECK_I(ret, "H5Pset_fletcher32");
    /* Make sure that this property list is what it should be */
    size2_verify_plist1(dcpl1_id);

    /* Second dcpl */
    ret = H5Pset_chunk(dcpl2_id, rank2, dims);
    CHECK_I(ret, "H5Pset_chunk");
    ret = H5Pset_deflate(dcpl2_id, 1);
    CHECK_I(ret, "H5Pset_deflate");
    ret = H5Pset_deflate(dcpl2_id, 2);
    CHECK_I(ret, "H5Pset_deflate");
    ret = H5Pset_deflate(dcpl2_id, 2);
    CHECK_I(ret, "H5Pset_deflate");
    ret = H5Pset_deflate(dcpl2_id, 1);
    CHECK_I(ret, "H5Pset_deflate");
    ret = H5Pset_deflate(dcpl2_id, 5);
    CHECK_I(ret, "H5Pset_deflate");
    /* Make sure that this property list is what it should be */
    size2_verify_plist2(dcpl2_id);

    /* Set up attribute data */
    memset(attr_string1, 0, (size_t)NAME_BUF_SIZE);
    memset(attr_string2, 0, (size_t)NAME_BUF_SIZE);
    strcpy(attr_string1, LONG_STRING);
    strcpy(attr_string2, LONG_STRING);
    attr_string2[1] = '1'; /* The second string starts "01 index..." */

    /* Set up attribute metadata */
    attr_type_id = H5Tcopy(H5T_C_S1);
    CHECK_I(attr_type_id, "H5Tcopy");
    ret = H5Tset_size(attr_type_id, (size_t)NAME_BUF_SIZE);
    CHECK_I(ret, "H5Tset_size");
    attr_space_id = H5Screate_simple(1, dims, dims);
    CHECK_I(attr_space_id, "H5Screate_simple");

    /* Create datasets with a big datatype, dataspace, fill value,
     * and filter pipeline.
     */
    for (x = 0; x < NUM_DATASETS; ++x) {
        dset_id = H5Dcreate2(file_id, DSETNAME[x], dtype1_id, dspace1_id, H5P_DEFAULT, dcpl1_id, H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dcreate2");

        attr_id = H5Acreate2(dset_id, "attr_name", attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string1);
        CHECK_I(ret, "H5Awrite");

        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");
        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");

        /* Gather extra statistics on first two datasets in file */
        if (x < 2) {
            ret = H5Fclose(file_id);
            CHECK_I(ret, "H5Fclose");

            /* Get the file's size now */
            if (x == 0)
                ret_sizes->first_dset = h5_get_file_size(FILENAME, H5P_DEFAULT);
            else
                ret_sizes->second_dset = h5_get_file_size(FILENAME, H5P_DEFAULT);

            file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
        } /* end if */
        /* Close & reopen file if requested */
        else if (test_file_closing) {
            file_id = close_reopen_file(file_id, FILENAME, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
        } /* end if */
    }     /* end for */

    /* Close file and get its size now */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    ret_sizes->dsets1 = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Create new group filled with datasets that use all different messages */
    file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");
    group_id = H5Gcreate2(file_id, "group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(group_id, "H5Gcreate2");

    /* Create NUM_DATASETS datasets in the new group */
    for (x = 0; x < NUM_DATASETS; ++x) {
        dset_id =
            H5Dcreate2(group_id, DSETNAME[x], dtype2_id, dspace2_id, H5P_DEFAULT, dcpl2_id, H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dcreate2");

        attr_id = H5Acreate2(dset_id, "attr_name", attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string2);
        CHECK_I(ret, "H5Awrite");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");

        /* Close everything & reopen file if requested */
        if (test_file_closing) {
            ret = H5Gclose(group_id);
            CHECK_I(ret, "H5Gclose");
            file_id = close_reopen_file(file_id, FILENAME, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
            group_id = H5Gopen2(file_id, "group", H5P_DEFAULT);
            CHECK_I(group_id, "H5Gopen2");
        }
    }

    /* Close file and get its size now */
    ret = H5Gclose(group_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    ret_sizes->dsets2 = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Create a new group and interleave writes of datasets types 1 and 2. */
    file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");
    group_id = H5Gcreate2(file_id, "interleaved group", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(group_id, "H5Gcreate2");

    /* Create NUM_DATASETS datasets in the new group */
    for (x = 0; x < NUM_DATASETS; x += 2) {
        dset_id =
            H5Dcreate2(group_id, DSETNAME[x], dtype1_id, dspace1_id, H5P_DEFAULT, dcpl1_id, H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dcreate2");

        attr_id = H5Acreate2(dset_id, "attr_name", attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string1);
        CHECK_I(ret, "H5Awrite");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");

        dset_id =
            H5Dcreate2(group_id, DSETNAME[x + 1], dtype2_id, dspace2_id, H5P_DEFAULT, dcpl2_id, H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dcreate2");

        attr_id = H5Acreate2(dset_id, "attr_name", attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string2);
        CHECK_I(ret, "H5Awrite");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");

        /* Close everything & reopen file if requested */
        if (test_file_closing) {
            ret = H5Gclose(group_id);
            CHECK_I(ret, "H5Gclose");
            file_id = close_reopen_file(file_id, FILENAME, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
            group_id = H5Gopen2(file_id, "interleaved group", H5P_DEFAULT);
            CHECK_I(group_id, "H5Gopen2");
        }
    }

    /* Close file and get its size now */
    ret = H5Gclose(group_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    ret_sizes->interleaved = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Create lots of new attribute messages on the group
     * (using different strings for the attribute)
     */
    file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");
    group_id = H5Gopen2(file_id, "group", H5P_DEFAULT);
    CHECK_I(group_id, "H5Gopen2");

    strcpy(attr_name, "00 index");

    for (x = 0; x < NUM_ATTRIBUTES; ++x) {
        /* Create a unique name and value for each attribute */
        attr_string1[0] = attr_name[0] = (char)((x / 10) + '0');
        attr_string1[1] = attr_name[1] = (char)((x % 10) + '0');

        /* Create an attribute on the group */
        attr_id = H5Acreate2(group_id, attr_name, attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string1);
        CHECK_I(ret, "H5Awrite");

        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");

        /* Close everything & reopen file if requested */
        if (test_file_closing) {
            ret = H5Gclose(group_id);
            CHECK_I(ret, "H5Gclose");
            file_id = close_reopen_file(file_id, FILENAME, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
            group_id = H5Gopen2(file_id, "group", H5P_DEFAULT);
            CHECK_I(group_id, "H5Gopen2");
        }
    }

    /* Close file and get its size now */
    ret = H5Gclose(group_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    ret_sizes->attrs1 = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Create all of the attributes again on the other group */
    file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");
    group_id = H5Gopen2(file_id, "interleaved group", H5P_DEFAULT);
    CHECK_I(group_id, "H5Gopen2");

    for (x = 0; x < NUM_ATTRIBUTES; ++x) {
        /* Create the same name and value for each attribute as before */
        attr_string1[0] = attr_name[0] = (char)((x / 10) + '0');
        attr_string1[1] = attr_name[1] = (char)((x % 10) + '0');

        /* Create an attribute on the group */
        attr_id = H5Acreate2(group_id, attr_name, attr_type_id, attr_space_id, H5P_DEFAULT, H5P_DEFAULT);
        CHECK_I(attr_id, "H5Acreate2");
        ret = H5Awrite(attr_id, attr_type_id, attr_string1);
        CHECK_I(ret, "H5Awrite");

        ret = H5Aclose(attr_id);
        CHECK_I(ret, "H5Aclose");

        /* Close everything & reopen file if requested */
        if (test_file_closing) {
            ret = H5Gclose(group_id);
            CHECK_I(ret, "H5Gclose");
            file_id = close_reopen_file(file_id, FILENAME, H5P_DEFAULT);
            CHECK_I(file_id, "H5Fopen");
            group_id = H5Gopen2(file_id, "interleaved group", H5P_DEFAULT);
            CHECK_I(group_id, "H5Gopen2");
        }
    }
    /* Close file and get its size now */
    ret = H5Gclose(group_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    ret_sizes->attrs2 = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Close everything */
    ret = H5Sclose(attr_space_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Tclose(attr_type_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Tclose(dtype1_id);
    CHECK_I(ret, "H5Tclose");
    ret = H5Tclose(dtype2_id);
    CHECK_I(ret, "H5Tclose");
    ret = H5Sclose(dspace1_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Sclose(dspace2_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Pclose(dcpl1_id);
    CHECK_I(ret, "H5Pclose");
    ret = H5Pclose(dcpl2_id);
    CHECK_I(ret, "H5Pclose");

    return 0;
} /* size2_helper */

/*-------------------------------------------------------------------------
 * Function:    size2_verify
 *
 * Purpose:     A helper function to verify the file created by size2_helper.
 *
 *              Runs various tests (not exhaustive) to ensure that the
 *              file FILENAME actually has the structure that size2_helper
 *              should have created.
 *
 *-------------------------------------------------------------------------
 */
static void
size2_verify(void)
{
    hid_t   file_id  = H5I_INVALID_HID;
    hid_t   dset_id  = H5I_INVALID_HID;
    hid_t   plist_id = H5I_INVALID_HID;
    hid_t   space_id = H5I_INVALID_HID;
    hid_t   group1_id, group2_id;
    hid_t   attr1_id, attr2_id;
    hid_t   attr_type_id;
    int     x, y;
    herr_t  ret;
    char    attr_string[NAME_BUF_SIZE];
    char    attr_correct_string[NAME_BUF_SIZE];
    char    attr_name[NAME_BUF_SIZE];
    int     ndims;
    hsize_t dims[SIZE2_RANK2];
    hsize_t correct_dims[SIZE2_RANK2] = SIZE2_DIMS;

    file_id = H5Fopen(FILENAME, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fopen");

    /* Verify property lists and dataspaces */

    /* Get property lists from first batch of datasets */
    for (x = 0; x < NUM_DATASETS; ++x) {
        dset_id = H5Dopen2(file_id, DSETNAME[x], H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dopen2");
        plist_id = H5Dget_create_plist(dset_id);
        CHECK_I(plist_id, "H5Dget_create_plist");
        size2_verify_plist1(plist_id);
        ret = H5Pclose(plist_id);
        CHECK_I(ret, "H5Pclose");

        space_id = H5Dget_space(dset_id);
        CHECK_I(space_id, "H5Dget_space");
        ndims = H5Sget_simple_extent_dims(space_id, dims, NULL);
        CHECK_I(ndims, "H5Sget_simple_extent_dims");
        VERIFY(ndims, SIZE2_RANK1, "H5Sget_simple_extent_dims");
        for (y = 0; y < ndims; ++y)
            VERIFY(dims[y], correct_dims[y], "H5Sget_simple_extent_dims");

        ret = H5Sclose(space_id);
        CHECK_I(ret, "H5Sclose");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
    }

    /* Get property lists from second batch of datasets */
    group1_id = H5Gopen2(file_id, "group", H5P_DEFAULT);
    CHECK_I(group1_id, "H5Gopen2");
    for (x = 0; x < NUM_DATASETS; ++x) {
        dset_id = H5Dopen2(group1_id, DSETNAME[x], H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dopen2");
        plist_id = H5Dget_create_plist(dset_id);
        CHECK_I(plist_id, "H5Dget_create_plist");
        size2_verify_plist2(plist_id);
        ret = H5Pclose(plist_id);
        CHECK_I(ret, "H5Pclose");

        space_id = H5Dget_space(dset_id);
        CHECK_I(space_id, "H5Dget_space");
        ndims = H5Sget_simple_extent_dims(space_id, dims, NULL);
        CHECK_I(ndims, "H5Sget_simple_extent_dims");
        VERIFY(ndims, SIZE2_RANK2, "H5Sget_simple_extent_dims");
        for (y = 0; y < ndims; ++y)
            VERIFY(dims[y], correct_dims[y], "H5Sget_simple_extent_dims");

        ret = H5Sclose(space_id);
        CHECK_I(ret, "H5Sclose");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
    } /* end for */
    ret = H5Gclose(group1_id);
    CHECK_I(ret, "H5Gclose");

    /* Get property lists from interleaved group of datasets */
    group1_id = H5Gopen2(file_id, "interleaved group", H5P_DEFAULT);
    CHECK_I(group1_id, "H5Gopen2");
    for (x = 0; x < NUM_DATASETS; x += 2) {
        /* First "type 1" dataset */
        dset_id = H5Dopen2(group1_id, DSETNAME[x], H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dopen2");
        plist_id = H5Dget_create_plist(dset_id);
        CHECK_I(plist_id, "H5Dget_create_plist");
        size2_verify_plist1(plist_id);
        ret = H5Pclose(plist_id);
        CHECK_I(ret, "H5Pclose");

        space_id = H5Dget_space(dset_id);
        CHECK_I(space_id, "H5Dget_space");
        ndims = H5Sget_simple_extent_dims(space_id, dims, NULL);
        CHECK_I(ndims, "H5Sget_simple_extent_dims");
        VERIFY(ndims, SIZE2_RANK1, "H5Sget_simple_extent_dims");
        for (y = 0; y < ndims; ++y)
            VERIFY(dims[y], correct_dims[y], "H5Sget_simple_extent_dims");

        ret = H5Sclose(space_id);
        CHECK_I(ret, "H5Sclose");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");

        /* Second "type 2" dataset */
        dset_id = H5Dopen2(group1_id, DSETNAME[x + 1], H5P_DEFAULT);
        CHECK_I(dset_id, "H5Dopen2");
        plist_id = H5Dget_create_plist(dset_id);
        CHECK_I(plist_id, "H5Dget_create_plist");
        size2_verify_plist2(plist_id);
        ret = H5Pclose(plist_id);
        CHECK_I(ret, "H5Pclose");

        space_id = H5Dget_space(dset_id);
        CHECK_I(space_id, "H5Dget_space");
        ndims = H5Sget_simple_extent_dims(space_id, dims, NULL);
        CHECK_I(ndims, "H5Sget_simple_extent_dims");
        VERIFY(ndims, SIZE2_RANK2, "H5Sget_simple_extent_dims");
        for (y = 0; y < ndims; ++y)
            VERIFY(dims[y], correct_dims[y], "H5Sget_simple_extent_dims");

        ret = H5Sclose(space_id);
        CHECK_I(ret, "H5Sclose");

        ret = H5Dclose(dset_id);
        CHECK_I(ret, "H5Dclose");
    } /* end for */
    ret = H5Gclose(group1_id);
    CHECK_I(ret, "H5Gclose");

    /* Verify attributes */

    /* Create attribute data type */
    attr_type_id = H5Tcopy(H5T_C_S1);
    CHECK_I(attr_type_id, "H5Tcopy");
    ret = H5Tset_size(attr_type_id, (size_t)NAME_BUF_SIZE);
    CHECK_I(ret, "H5Tset_size");

    /* Read attributes on both groups and verify that they are correct */
    group1_id = H5Gopen2(file_id, "group", H5P_DEFAULT);
    CHECK_I(group1_id, "H5Gopen2");
    group2_id = H5Gopen2(file_id, "interleaved group", H5P_DEFAULT);
    CHECK_I(group2_id, "H5Gopen2");

    memset(attr_string, 0, (size_t)NAME_BUF_SIZE);
    memset(attr_correct_string, 0, (size_t)NAME_BUF_SIZE);
    strcpy(attr_correct_string, LONG_STRING);
    strcpy(attr_name, "00 index");

    for (x = 0; x < NUM_ATTRIBUTES; ++x) {
        /* Create the name and correct value for each attribute */
        attr_correct_string[0] = attr_name[0] = (char)((x / 10) + '0');
        attr_correct_string[1] = attr_name[1] = (char)((x % 10) + '0');

        attr1_id = H5Aopen(group1_id, attr_name, H5P_DEFAULT);
        CHECK_I(attr1_id, "H5Aopen");
        attr2_id = H5Aopen(group2_id, attr_name, H5P_DEFAULT);
        CHECK_I(attr2_id, "H5Aopen");

        ret = H5Aread(attr1_id, attr_type_id, attr_string);
        CHECK_I(ret, "H5Aread");
        VERIFY_STR(attr_string, attr_correct_string, "H5Aread");
        ret = H5Aread(attr2_id, attr_type_id, attr_string);
        CHECK_I(ret, "H5Aread");
        VERIFY_STR(attr_string, attr_correct_string, "H5Aread");

        ret = H5Aclose(attr1_id);
        CHECK_I(attr1_id, "H5Aclose");
        ret = H5Aclose(attr2_id);
        CHECK_I(attr2_id, "H5Aclose");
    }

    /* Close everything */
    ret = H5Tclose(attr_type_id);
    CHECK_I(ret, "H5Tclose");
    ret = H5Gclose(group1_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Gclose(group2_id);
    CHECK_I(ret, "H5Gclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
} /* size2_verify */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_size2
 *
 * Purpose:     Tests shared object header messages using size2_helper to
 *              create different kinds of big messages.
 *
 *              If close_reopen is set, closes and reopens the HDF5 file
 *              repeatedly while writing.
 *
 *              This test works by first creating FCPLs with various
 *              parameters, then creating a standard file that includes
 *              every kind of message that can be shared using the helper
 *              function size2_helper.  The test measures the size of the
 *              file at various points.  Once all of the files have been
 *              generated, the test compares the measured sizes of the files.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_size2(int close_reopen)
{
    hid_t fcpl_id = H5I_INVALID_HID;
    /* Sizes for file with no shared messages at all */
    size2_helper_struct norm_sizes;
    /* Sizes for files with all messages in one index */
    size2_helper_struct list_index_med, list_index_big;
    size2_helper_struct btree_index, list_index_small;
    /* Sizes for files with messages in three different indexes */
    size2_helper_struct mult_index_med, mult_index_btree;
    /* Sizes for files that don't share all kinds of messages */
    size2_helper_struct share_some_med, share_some_btree;
    /* Sizes for files that share different sizes of messages */
    size2_helper_struct share_some_toobig_index, share_tiny_index, type_space_index;
    herr_t              ret;

    if (close_reopen == 0)
        MESSAGE(5, ("Testing that shared object header messages save space\n"));
    else
        MESSAGE(5, ("Testing that shared messages save space when file is closed and reopened\n"));

    /* Create an fcpl with SOHMs disabled */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &norm_sizes);
    size2_verify();

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");

    /* Create an fcpl with one big index */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Set the indexes to use a medium-sized list */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 30, 25);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &list_index_med);
    size2_verify();

    /* Try making the list really big */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 1000, 900);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &list_index_big);
    size2_verify();

    /* Use a B-tree instead of a list */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &btree_index);
    size2_verify();

    /* Use such a small list that it'll become a B-tree */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 10, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &list_index_small);
    size2_verify();

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");

    /* Create a new property list that puts messages in different indexes. */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");

    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 3);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_DTYPE_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_FILL_FLAG | H5O_SHMESG_PLINE_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 2, H5O_SHMESG_ATTR_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Use lists that are the same size as the "medium" list on the previous
     * run.
     */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 30, 25);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &mult_index_med);
    size2_verify();

    /* Use all B-trees */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &mult_index_btree);
    size2_verify();

    /* Edit the same property list (this should work) and don't share all messages.
     */
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_PLINE_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_DTYPE_FLAG | H5O_SHMESG_FILL_FLAG, 100000);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 2, H5O_SHMESG_ATTR_FLAG | H5O_SHMESG_SDSPACE_FLAG, 20);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Use "normal-sized" lists. */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 30, 25);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &share_some_med);
    size2_verify();

    /* Use btrees. */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &share_some_btree);
    size2_verify();

    /* Change the second index to hold only gigantic messages.  Result should
     * be the same as the previous file.
     */
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_DTYPE_FLAG | H5O_SHMESG_FILL_FLAG, 100000);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &share_some_toobig_index);
    size2_verify();

    /* Share even tiny dataspace and datatype messages.  This should result in
     * attribute datatypes being shared.  Make this one use "really big" lists.
     * It turns out that attribute dataspaces are just big enough that it saves
     * some space to share them, while sharing datatypes creates as much overhead
     * as one gains from sharing them.
     */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_DTYPE_FLAG | H5O_SHMESG_SDSPACE_FLAG, 1);
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 1000, 900);

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &share_tiny_index);
    size2_verify();

    /* Create the same file but don't share the really tiny messages */
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_DTYPE_FLAG | H5O_SHMESG_SDSPACE_FLAG, 100);
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 1000, 900);

    /* Get the file size & verify its contents */
    size2_helper(fcpl_id, close_reopen, &type_space_index);
    size2_verify();

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");

    /* Check that all sizes make sense.  There is lots of room for inexact
     * results here since so many different factors contribute to file size.
     */

    /* Check sizes of all files created using a single index first */

    /* The empty size of each file with shared messages enabled should be the
     * same and should be bigger than a normal file.
     */
    if (norm_sizes.empty_size > list_index_med.empty_size)
        VERIFY(norm_sizes.empty_size, 1, "h5_get_file_size");
    if (list_index_med.empty_size != list_index_big.empty_size)
        VERIFY(list_index_med.empty_size, list_index_big.empty_size, "h5_get_file_size");
    if (list_index_med.empty_size != btree_index.empty_size)
        VERIFY(list_index_med.empty_size, btree_index.empty_size, "h5_get_file_size");
    if (list_index_med.empty_size != list_index_small.empty_size)
        VERIFY(list_index_med.empty_size, list_index_small.empty_size, "h5_get_file_size");
    /* The files with indexes shouldn't be that much bigger than an
     * empty file.
     */
    if (list_index_med.empty_size > (h5_stat_size_t)((float)norm_sizes.empty_size * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");

    /* Once one dataset has been created (with one of every kind of message),
     * the normal file should still be smallest.  The very small list
     * btree_convert should be smaller than the B-tree since it has no
     * extra overhead.  The small list should also be smaller than the B-tree.
     * The very large list should be much larger than anything else.
     */
    if (norm_sizes.first_dset >= list_index_small.first_dset)
        VERIFY(norm_sizes.first_dset, 1, "h5_get_file_size");
    if (list_index_small.first_dset >= btree_index.first_dset)
        VERIFY(list_index_small.first_dset, 1, "h5_get_file_size");
    if (list_index_med.first_dset >= btree_index.first_dset)
        VERIFY(btree_index.first_dset, 1, "h5_get_file_size");
    if (btree_index.first_dset >= list_index_big.first_dset)
        VERIFY(list_index_med.first_dset, 1, "h5_get_file_size");

    /* Once a few copies of the same dataset have been created, the
     * very small list shouldn't have become a B-tree yet, so it should
     * be the smallest file.  A larger list should be next, followed
     * by a B-tree, followed by a normal file, followed by a
     * list that is too large.
     */
    if (list_index_small.dsets1 >= list_index_med.dsets1)
        VERIFY(btree_index.dsets1, 1, "h5_get_file_size");
    if (list_index_med.dsets1 >= btree_index.dsets1)
        VERIFY(list_index_med.dsets1, 1, "h5_get_file_size");
    if (btree_index.dsets1 >= norm_sizes.dsets1)
        VERIFY(btree_index.dsets1, 1, "h5_get_file_size");
    if (norm_sizes.dsets1 >= list_index_big.dsets1)
        VERIFY(list_index_big.dsets1, 1, "h5_get_file_size");

    /* The size gain should have been the same for each of the lists;
     * their overhead is fixed.  The B-tree should have gained at least
     * as much, and the normal file more than that.
     */
    if ((list_index_small.dsets1 - list_index_small.first_dset) !=
        (list_index_med.dsets1 - list_index_med.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_med.dsets1 - list_index_med.first_dset) !=
        (list_index_big.dsets1 - list_index_big.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_big.dsets1 - list_index_big.first_dset) > (btree_index.dsets1 - btree_index.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((btree_index.dsets1 - btree_index.first_dset) >= (norm_sizes.dsets1 - norm_sizes.first_dset))
        VERIFY(0, 1, "h5_get_file_size");

    /* Once another kind of each message has been written, the very small list
     * should convert into a B-tree.  Now the list should be smallest, then
     * the B-trees (although the converted B-tree file may be a little bigger),
     * then the normal file.  The largest list may or may not be bigger than
     * the normal file.
     */
    if (list_index_med.dsets2 >= btree_index.dsets2)
        VERIFY(list_index_med.dsets2, 1, "h5_get_file_size");
    if (btree_index.dsets2 > (h5_stat_size_t)((float)list_index_small.dsets2 * OVERHEAD_ALLOWED))
        VERIFY(btree_index.dsets2, list_index_small.dsets2, "h5_get_file_size");
    if (list_index_small.dsets2 >= norm_sizes.dsets2)
        VERIFY(btree_index.dsets2, 1, "h5_get_file_size");
    /* If the small list (now a B-tree) is bigger than the existing B-tree,
     * it shouldn't be much bigger.
     * It seems that the small lists tends to be pretty big anyway.  Allow
     * for it to have twice as much overhead.
     */
    if (list_index_small.dsets2 >
        (h5_stat_size_t)((float)btree_index.dsets2 * OVERHEAD_ALLOWED * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    /* The lists should have grown the least since they share messages and
     * have no extra overhead.  The normal file should have grown more than
     * either the lists or the B-tree.  The B-tree may not have grown more
     * than the lists, depending on whether it needed to split nodes or not.
     */
    if ((list_index_med.dsets2 - list_index_med.dsets1) != (list_index_big.dsets2 - list_index_big.dsets1))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_big.dsets2 - list_index_big.dsets1) > (btree_index.dsets2 - btree_index.dsets1))
        VERIFY(0, 1, "h5_get_file_size");
    if ((btree_index.dsets2 - btree_index.dsets1) >= (norm_sizes.dsets2 - norm_sizes.dsets1))
        VERIFY(0, 1, "h5_get_file_size");

    /* Interleaving the writes should have no effect on how the messages are
     * shared.  No new messages should be written to the indexes, so the
     * sohm files will only get a little bit bigger.
     */
    if (list_index_med.interleaved >= btree_index.interleaved)
        VERIFY(0, 1, "h5_get_file_size");
    if (btree_index.interleaved > (h5_stat_size_t)((float)list_index_small.interleaved * OVERHEAD_ALLOWED))
        VERIFY(btree_index.interleaved, list_index_small.interleaved, "h5_get_file_size");
    if (list_index_small.interleaved >= norm_sizes.interleaved)
        VERIFY(0, 1, "h5_get_file_size");
    /* The lists should still have grown the same amount.  The converted
     * B-tree shouldn't have grown more than the index that was originally
     * a B-tree (although it might have grown less if there was extra free
     * space within the file).
     */
    if ((list_index_med.interleaved - list_index_med.dsets2) !=
        (list_index_big.interleaved - list_index_big.dsets2))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_big.interleaved - list_index_big.dsets2) > (btree_index.interleaved - btree_index.dsets2))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_small.interleaved - list_index_small.dsets2) >
        (btree_index.interleaved - btree_index.dsets2))
        VERIFY(0, 1, "h5_get_file_size");
    if ((btree_index.interleaved - btree_index.dsets2) >= (norm_sizes.interleaved - norm_sizes.dsets2))
        VERIFY(0, 1, "h5_get_file_size");

    /* After many attributes have been written, both the small and medium lists
     * should have become B-trees and be about the same size as the index
     * that started as a B-tree.
     * Add in OVERHEAD_ALLOWED as a fudge factor here, since the allocation
     * of file space can be hard to predict.
     */
    if (btree_index.attrs1 > (h5_stat_size_t)((float)list_index_small.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(btree_index.attrs1, list_index_small.attrs1, "h5_get_file_size");
    if (btree_index.attrs1 > (h5_stat_size_t)((float)list_index_med.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_med.attrs1 > (h5_stat_size_t)((float)btree_index.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_small.attrs1 > (h5_stat_size_t)((float)btree_index.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    /* Neither of the converted lists should be too much bigger than
     * the index that was originally a B-tree.
     */
    if (list_index_small.attrs1 > (h5_stat_size_t)((float)btree_index.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_med.attrs1 > (h5_stat_size_t)((float)btree_index.attrs1 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    /* The "normal" file should have had less overhead, so should gain less
     * size than any of the other indexes since none of these attribute
     * messages could be shared.  The large list should have gained
     * less overhead than the B-tree indexes.
     */
    if ((norm_sizes.attrs1 - norm_sizes.interleaved) >= (list_index_big.attrs1 - list_index_big.interleaved))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_big.attrs1 - list_index_big.interleaved) >=
        (list_index_small.attrs1 - list_index_small.interleaved))
        VERIFY(0, 1, "h5_get_file_size");

    /* Give it some overhead (for checkin to move messages into continuation message) */
    if ((list_index_small.attrs1 - list_index_small.interleaved) >
        (h5_stat_size_t)((float)(btree_index.attrs1 - btree_index.interleaved) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");

    /* Writing another copy of each attribute shouldn't change the ordering
     * of sizes.  The big list index is still too big to be smaller than a
     * normal file.  The B-tree indexes should all be about the same size.
     */
    if (btree_index.attrs2 > (h5_stat_size_t)((float)list_index_small.attrs2 * OVERHEAD_ALLOWED))
        VERIFY(btree_index.attrs2, list_index_small.attrs2, "h5_get_file_size");
    if (list_index_small.attrs2 > (h5_stat_size_t)((float)btree_index.attrs2 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (btree_index.attrs2 > (h5_stat_size_t)((float)list_index_med.attrs2 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_med.attrs2 > (h5_stat_size_t)((float)btree_index.attrs2 * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_med.attrs2 >= norm_sizes.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    if (list_index_big.attrs2 >= norm_sizes.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    /* All of the B-tree indexes should have gained about the same amount
     * of space; at least as much as the list index and less than a normal
     * file.
     */
    if ((list_index_small.attrs2 - list_index_small.attrs1) > (btree_index.attrs2 - btree_index.attrs1))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_med.attrs2 - list_index_med.attrs1) > (btree_index.attrs2 - btree_index.attrs1))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_big.attrs2 - list_index_big.attrs1) > (list_index_med.attrs2 - list_index_med.attrs1))
        VERIFY(0, 1, "h5_get_file_size");
    if ((btree_index.attrs2 - btree_index.attrs1) >= (norm_sizes.attrs2 - norm_sizes.attrs1))
        VERIFY(0, 1, "h5_get_file_size");

    /* Done checking the first few files that use a single index. */

    /* Start comparing other kinds of files with these "standard"
     * one-index files
     */

    /* Check files with multiple indexes. */
    /* These files should be larger when first created than one-index
     * files.
     */
    if (mult_index_med.empty_size <= list_index_med.empty_size)
        VERIFY(0, 1, "h5_get_file_size");
    if (mult_index_btree.empty_size != mult_index_med.empty_size)
        VERIFY(0, 1, "h5_get_file_size");

    /* When the first dataset is written, they should grow quite a bit as
     * many different indexes must be created.
     */
    if ((mult_index_med.first_dset - mult_index_med.empty_size) <=
        (list_index_med.first_dset - list_index_med.empty_size))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.first_dset - mult_index_btree.empty_size) <=
        (btree_index.first_dset - btree_index.empty_size))
        VERIFY(0, 1, "h5_get_file_size");

    /* When the second dataset is written, they should grow less as
     * some extra heap space is allocated, but no more indices.
     */
    if ((mult_index_med.second_dset - mult_index_med.first_dset) >
        (mult_index_med.first_dset - mult_index_med.empty_size))
        VERIFY(0, 1, "h5_get_file_size");
    if ((list_index_med.second_dset - list_index_med.first_dset) >
        (list_index_med.first_dset - list_index_med.empty_size))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.second_dset - mult_index_btree.first_dset) >
        (mult_index_btree.first_dset - mult_index_btree.empty_size))
        VERIFY(0, 1, "h5_get_file_size");
    if ((btree_index.second_dset - btree_index.first_dset) >
        (btree_index.first_dset - btree_index.empty_size))
        VERIFY(0, 1, "h5_get_file_size");

    /* And the size delta for the second dataset is less in files with only
     *  one index.
     */
    if ((mult_index_med.second_dset - mult_index_med.first_dset) <=
        (list_index_med.second_dset - list_index_med.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.first_dset - mult_index_btree.empty_size) <=
        (btree_index.first_dset - btree_index.empty_size))
        VERIFY(0, 1, "h5_get_file_size");

    /* Once that initial overhead is out of the way and the lists/btrees
     * have been created, files with more than one index should grow at
     * the same rate or slightly faster than files with just one index
     * and one heap.
     */
    if ((mult_index_med.dsets1 - mult_index_med.second_dset) !=
        (list_index_med.dsets1 - list_index_med.second_dset))
        VERIFY((mult_index_med.dsets1 - mult_index_med.second_dset),
               (list_index_med.dsets1 - list_index_med.second_dset), "h5_get_file_size");
    if ((mult_index_btree.dsets1 - mult_index_btree.second_dset) !=
        (btree_index.dsets1 - btree_index.second_dset))
        VERIFY((mult_index_btree.dsets1 - mult_index_btree.second_dset),
               (btree_index.dsets1 - btree_index.second_dset), "h5_get_file_size");

    if ((mult_index_med.dsets2 - mult_index_med.dsets1) >
        (h5_stat_size_t)((float)(list_index_med.dsets2 - list_index_med.dsets1) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.dsets2 - mult_index_btree.dsets1) >
        (h5_stat_size_t)((float)(btree_index.dsets2 - btree_index.dsets1) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");

    if ((mult_index_med.interleaved - mult_index_med.dsets2) >
        (h5_stat_size_t)((float)(list_index_med.interleaved - list_index_med.dsets2) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.interleaved - mult_index_btree.dsets2) >
        (h5_stat_size_t)((float)(btree_index.interleaved - btree_index.dsets2) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");

    /* When all the attributes are added, only the index holding attributes
     * will become a B-tree.  Skip the interleaved to attrs1 interval when
     * this happens because it's hard to predict exactly how much space this
     * will take.
     */
    if ((mult_index_med.attrs2 - mult_index_med.attrs1) >
        (h5_stat_size_t)((float)(list_index_med.attrs2 - list_index_med.attrs1) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");
    if ((mult_index_btree.attrs2 - mult_index_btree.attrs1) >
        (h5_stat_size_t)((float)(btree_index.attrs2 - btree_index.attrs1) * OVERHEAD_ALLOWED))
        VERIFY(0, 1, "h5_get_file_size");

    /* The final file size for both of the multiple index files should be
     * smaller than a normal file but bigger than any of the one-index files.
     */
    if (mult_index_med.attrs2 >= norm_sizes.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    if (mult_index_btree.attrs2 >= norm_sizes.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)mult_index_med.attrs2 * OVERHEAD_ALLOWED) < btree_index.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)mult_index_btree.attrs2 * OVERHEAD_ALLOWED) < btree_index.attrs2)
        VERIFY(0, 1, "h5_get_file_size");

    /* Check files that don't share all messages. */
    /* These files have three indexes like the files above, so they should be
     * the same size when created.
     */
    if (share_some_med.empty_size != mult_index_med.empty_size)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_med.empty_size != share_some_btree.empty_size)
        VERIFY(0, 1, "h5_get_file_size");

    /* When the first dataset is created, they should be not quite as big
     * as equivalent files that share all messages (since shared messages
     * have a little bit of overhead).
     */
    if (share_some_med.first_dset >= mult_index_med.first_dset)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.first_dset >= mult_index_btree.first_dset)
        VERIFY(0, 1, "h5_get_file_size");

    /* The files that share some should have a growth rate in between
     * files that share all messages and normal files
     */
    if ((share_some_med.interleaved - share_some_med.first_dset) <=
        (mult_index_med.interleaved - mult_index_med.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((share_some_med.interleaved - share_some_med.first_dset) >=
        (norm_sizes.interleaved - norm_sizes.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((share_some_btree.interleaved - share_some_btree.first_dset) <=
        (mult_index_btree.interleaved - mult_index_btree.first_dset))
        VERIFY(0, 1, "h5_get_file_size");
    if ((share_some_btree.interleaved - share_some_btree.first_dset) >=
        (norm_sizes.interleaved - norm_sizes.first_dset))
        VERIFY(0, 1, "h5_get_file_size");

    /* Check the file that only stored gigantic messages in its second
     * index.  Since no messages were that big, it should be identical
     * to the file with an empty index.
     */
    if (share_some_btree.empty_size != share_some_toobig_index.empty_size)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.first_dset != share_some_toobig_index.first_dset)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.dsets1 != share_some_toobig_index.dsets1)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.dsets2 != share_some_toobig_index.dsets2)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.interleaved != share_some_toobig_index.interleaved)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.attrs1 != share_some_toobig_index.attrs1)
        VERIFY(0, 1, "h5_get_file_size");
    if (share_some_btree.attrs2 != share_some_toobig_index.attrs2)
        VERIFY(0, 1, "h5_get_file_size");

    /* Check the file that shares even very tiny messages.  Once messages
     * are written to it, it should gain a little space from sharing the
     * messages and lose a little space to overhead so that it's just slightly
     * smaller than a file that doesn't share tiny messages.
     * If the overhead increases or the size of messages decreases, these
     * numbers may be off.
     */
    if (share_tiny_index.empty_size != type_space_index.empty_size)
        VERIFY(share_tiny_index.empty_size, type_space_index.empty_size, "h5_get_file_size");

    if (share_tiny_index.first_dset >=
        (h5_stat_size_t)((float)type_space_index.first_dset * OVERHEAD_ALLOWED))
        VERIFY(share_tiny_index.first_dset, type_space_index.first_dset, "h5_get_file_size");
    if (share_tiny_index.first_dset < type_space_index.first_dset)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.second_dset >= type_space_index.second_dset)
        VERIFY(share_tiny_index.second_dset, type_space_index.second_dset, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.second_dset * OVERHEAD_ALLOWED) <
        type_space_index.second_dset)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.dsets1 >= type_space_index.dsets1)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.dsets1 * OVERHEAD_ALLOWED) < type_space_index.dsets1)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.dsets2 >= type_space_index.dsets2)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.dsets2 * OVERHEAD_ALLOWED) < type_space_index.dsets2)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.interleaved >= type_space_index.interleaved)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.interleaved * OVERHEAD_ALLOWED) <
        type_space_index.interleaved)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.attrs1 >= type_space_index.attrs1)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.attrs1 * OVERHEAD_ALLOWED) < type_space_index.attrs1)
        VERIFY(0, 1, "h5_get_file_size");

    if (share_tiny_index.attrs2 >= type_space_index.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
    if ((h5_stat_size_t)((float)share_tiny_index.attrs2 * OVERHEAD_ALLOWED) < type_space_index.attrs2)
        VERIFY(0, 1, "h5_get_file_size");
} /* test_sohm_size2 */

/*-------------------------------------------------------------------------
 * Function:    delete_helper_write
 *
 * Purpose:     Creates a dataset and attribute in file FILE_ID using value X
 *              in the DSPACE_ID and DCPL_ID arrays.
 *
 *-------------------------------------------------------------------------
 */
static void
delete_helper_write(hid_t file_id, hid_t *dspace_id, hid_t *dcpl_id, int x)
{
    hid_t  dset_id = H5I_INVALID_HID;
    hid_t  attr_id = H5I_INVALID_HID;
    char   wdata;
    herr_t ret;

    dset_id =
        H5Dcreate2(file_id, DSETNAME[x], H5T_NATIVE_CHAR, dspace_id[x], H5P_DEFAULT, dcpl_id[x], H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dcreate2");
    wdata = (char)(x + 'a');
    ret   = H5Dwrite(dset_id, H5T_NATIVE_CHAR, dspace_id[x], dspace_id[x], H5P_DEFAULT, &wdata);
    CHECK_I(ret, "H5Dwrite");

    attr_id = H5Acreate2(dset_id, "attr_name", H5T_NATIVE_CHAR, dspace_id[x], H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(attr_id, "H5Acreate2");
    ret = H5Awrite(attr_id, H5T_NATIVE_CHAR, &wdata);
    CHECK_I(ret, "H5Awrite");

    ret = H5Aclose(attr_id);
    CHECK_I(ret, "H5Aclose");
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");
} /* delete_helper_write */

/*-------------------------------------------------------------------------
 * Function:    delete_helper_read
 *
 * Purpose:     Checks the value of the dataset and attribute created by
 *              delete_helper_write.
 *
 *-------------------------------------------------------------------------
 */
static void
delete_helper_read(hid_t file_id, hid_t *dspace_id, int x)
{
    hid_t  dset_id = H5I_INVALID_HID;
    hid_t  attr_id = H5I_INVALID_HID;
    char   rdata;
    herr_t ret;

    dset_id = H5Dopen2(file_id, DSETNAME[x], H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dopen2");
    rdata = '\0';
    ret   = H5Dread(dset_id, H5T_NATIVE_CHAR, dspace_id[x], dspace_id[x], H5P_DEFAULT, &rdata);
    CHECK_I(ret, "H5Dread");
    VERIFY(rdata, (x + 'a'), "H5Dread");

    attr_id = H5Aopen(dset_id, "attr_name", H5P_DEFAULT);
    CHECK_I(attr_id, "H5Aopen");
    rdata = '\0';
    ret   = H5Aread(attr_id, H5T_NATIVE_CHAR, &rdata);
    CHECK_I(ret, "H5Dread");
    VERIFY(rdata, (x + 'a'), "H5Dread");

    ret = H5Aclose(attr_id);
    CHECK_I(ret, "H5Aclose");
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");
} /* delete_helper_read */

/*-------------------------------------------------------------------------
 * Function:    delete_helper
 *
 * Purpose:     Creates some shared messages, deletes them, and creates some
 *              more messages.  The second batch of messages should use the
 *              space freed by the first batch, so should be about the same
 *              size as a file that never had the first batch of messages
 *              created.
 *
 *              FCPL_ID is the file creation property list to use.
 *              DSPACE_ID and DCPL_ID are arrays of different dataspaces
 *              and property lists with filter pipelines used to create the
 *              messages.
 *
 *-------------------------------------------------------------------------
 */
static void
delete_helper(hid_t fcpl_id, hid_t *dspace_id, hid_t *dcpl_id)
{
    hid_t          file_id = H5I_INVALID_HID;
    int            x;
    h5_stat_size_t norm_filesize;
    h5_stat_size_t deleted_filesize;
    herr_t         ret;

    /* Get the size of a "normal" file with no deleted messages */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    /* Create batch of messages in the file starting at message 2 */
    for (x = HALF_DELETE_NUM_MESGS; x < DELETE_NUM_MESGS; ++x) {
        delete_helper_write(file_id, dspace_id, dcpl_id, x);
    }

    /* Check that messages can be read */
    for (x = HALF_DELETE_NUM_MESGS; x < DELETE_NUM_MESGS; ++x) {
        delete_helper_read(file_id, dspace_id, x);
    }

    /* Close file and get filesize */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    norm_filesize = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Create a new file with messages 0 to (HALF_DELETE_NUM_MESGS - 1) */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    for (x = 0; x < HALF_DELETE_NUM_MESGS; ++x) {
        delete_helper_write(file_id, dspace_id, dcpl_id, x);
    }

    /* Verify each dataset, then delete it (which should delete
     * its shared messages as well
     */
    for (x = 0; x < HALF_DELETE_NUM_MESGS; ++x) {
        delete_helper_read(file_id, dspace_id, x);
        ret = H5Ldelete(file_id, DSETNAME[x], H5P_DEFAULT);
        CHECK_I(ret, "H5Ldelete");
    }

    /* The file is now empty.  Write and verify the second batch of messages
     * again.
     */
    for (x = HALF_DELETE_NUM_MESGS; x < DELETE_NUM_MESGS; ++x) {
        delete_helper_write(file_id, dspace_id, dcpl_id, x);
    }
    for (x = HALF_DELETE_NUM_MESGS; x < DELETE_NUM_MESGS; ++x) {
        delete_helper_read(file_id, dspace_id, x);
    }

    /* Close file and get filesize */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    deleted_filesize = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* The two filesizes should be almost the same */
    if (norm_filesize > (h5_stat_size_t)((float)deleted_filesize * OVERHEAD_ALLOWED))
        VERIFY(norm_filesize, deleted_filesize, "h5_get_file_size");
    if (deleted_filesize > (h5_stat_size_t)((float)norm_filesize * OVERHEAD_ALLOWED))
        VERIFY(deleted_filesize, norm_filesize, "h5_get_file_size");
} /* delete_helper */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_delete
 *
 * Purpose:     Tests shared object header message deletion.
 *
 *              Creates lots of shared messages, then ensures that they
 *              can be deleted without corrupting the remaining messages.
 *              Also checks that indexes convert from B-trees back into
 *              lists.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_delete(void)
{
    hid_t fcpl_id;
    /* We'll use dataspaces and filter pipelines for this test.
     *  Create a number of distinct messages of each type.
     */
    hid_t    dspace_id[DELETE_NUM_MESGS] = {0};
    hid_t    dcpl_id[DELETE_NUM_MESGS]   = {0};
    unsigned u;
    int      x;
    hsize_t  dims[] = DELETE_DIMS;
    herr_t   ret;

    MESSAGE(5, ("Testing deletion of SOHMs\n"));

    /* Create a number of different dataspaces.
     * For simplicity, each dataspace has only one element.
     */
    for (u = 0; u < DELETE_NUM_MESGS; ++u) {
        dspace_id[u] = H5Screate_simple((int)(u + 1), dims, dims);
        CHECK_I(dspace_id[u], "H5Screate_simple");
    } /* end for */

    /* Create a number of different filter pipelines. */
    dcpl_id[0] = H5Pcreate(H5P_DATASET_CREATE);
    CHECK_I(dcpl_id[0], "H5Pcreate");

    ret = H5Pset_chunk(dcpl_id[0], 1, dims);
    CHECK_I(ret, "H5Pset_chunk");
    ret = H5Pset_shuffle(dcpl_id[0]);
    CHECK_I(ret, "H5Pset_shuffle");

    for (u = 1; u < DELETE_NUM_MESGS; u += 2) {
        dcpl_id[u] = H5Pcopy(dcpl_id[u - 1]);
        CHECK_I(dcpl_id[u], "H5Pcopy");
        ret = H5Pset_chunk(dcpl_id[u], (int)(u + 1), dims);
        CHECK_I(ret, "H5Pset_chunk");
        ret = H5Pset_deflate(dcpl_id[u], 1);
        CHECK_I(ret, "H5Pset_deflate");

        dcpl_id[u + 1] = H5Pcopy(dcpl_id[u]);
        CHECK_I(dcpl_id[u + 1], "H5Pcopy");
        ret = H5Pset_chunk(dcpl_id[u + 1], (int)(u + 2), dims);
        CHECK_I(ret, "H5Pset_chunk");
        ret = H5Pset_shuffle(dcpl_id[u + 1]);
        CHECK_I(ret, "H5Pset_shuffle");
    } /* end for */

    /* Create an fcpl where all messages are shared in the same index */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Use big list indexes */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 4 * DELETE_NUM_MESGS, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Test that messages can be created and deleted properly */
    delete_helper(fcpl_id, dspace_id, dcpl_id);

    /* Use B-tree indexes */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    delete_helper(fcpl_id, dspace_id, dcpl_id);

    /* Use small list indexes that will convert from lists to B-trees and back */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, HALF_DELETE_NUM_MESGS, HALF_DELETE_NUM_MESGS - 1);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    delete_helper(fcpl_id, dspace_id, dcpl_id);

    /* Use two indexes */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 2);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_SDSPACE_FLAG | H5O_SHMESG_ATTR_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_DTYPE_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Use big list indexes */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 5000, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    /* Use B-tree indexes */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    delete_helper(fcpl_id, dspace_id, dcpl_id);

    /* Set phase change values so that one index converts to a B-tree and one doesn't */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, HALF_DELETE_NUM_MESGS + 1, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    delete_helper(fcpl_id, dspace_id, dcpl_id);

    /* Test with varying message sizes (ideally, so some messages are too
     * small to be written but some are big enough that they are still written
     */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    for (u = DELETE_MIN_MESG_SIZE; u <= DELETE_MAX_MESG_SIZE; u += 10) {
        ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, u);
        CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
        delete_helper(fcpl_id, dspace_id, dcpl_id);
    } /* end for */

    /* Cleanup */
    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");

    for (x = DELETE_NUM_MESGS - 1; x >= 0; --x) {
        ret = H5Sclose(dspace_id[x]);
        CHECK_I(ret, "H5Sclose");
        ret = H5Pclose(dcpl_id[x]);
        CHECK_I(ret, "H5Pclose");
    } /* end for */
} /* test_sohm_delete */

/*-------------------------------------------------------------------------
 * Function:    verify_dset_create_and_delete_does_not_grow_file
 *
 * Purpose:     Tests that shared object header message deletion returns
 *              the file to its previous state using the supplied FCPL.
 *
 *              Creates a file according to the supplied FCPL,
 *              then creates datasets and deletes them.
 *              Done in two passes: once with one dataset, once with two.
 *
 *-------------------------------------------------------------------------
 */
static int
verify_dset_create_and_delete_does_not_grow_file(hid_t fcpl_id)
{
    hid_t          file_id;
    hid_t          dspace_id;
    hid_t          dset_id;
    hsize_t        dims[1] = {1};
    h5_stat_size_t initial_filesize, deleted_filesize;
    int            old_nerrs; /* Number of errors when entering this routine */
    herr_t         ret;

    /* Retrieve the current # of reported errors */
    old_nerrs = GetTestNumErrs();

    /* Create a dataspace for later */
    dspace_id = H5Screate_simple(1, dims, dims);
    CHECK_I(dspace_id, "H5Screate_simple");

    /* Create a file using the FCPL supplied*/
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    /* Close the file and get its size */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    initial_filesize = h5_get_file_size(FILENAME, H5P_DEFAULT);

    /* Re-create the file and create a dataset in it */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    dset_id = H5Dcreate2(file_id, "dset", H5T_NATIVE_SHORT, dspace_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dcreate2");

    /* Close the dataset and delete it */
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Ldelete(file_id, "dset", H5P_DEFAULT);
    CHECK_I(ret, "H5Ldelete");

    /* Close the file and get its size */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    deleted_filesize = h5_get_file_size(FILENAME, H5P_DEFAULT);

    VERIFY(deleted_filesize, initial_filesize, "h5_get_file_size");

    /* Repeat, creating two datasets in the file */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    /* Create and close the first dataset */
    dset_id = H5Dcreate2(file_id, "dset", H5T_NATIVE_SHORT, dspace_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dcreate2");
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");

    /* Create and close the second.  These messages should be shared */
    dset_id =
        H5Dcreate2(file_id, "dset2", H5T_NATIVE_SHORT, dspace_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dcreate2");
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");

    /* Delete both datasets */
    ret = H5Ldelete(file_id, "dset", H5P_DEFAULT);
    CHECK_I(ret, "H5Ldelete");
    ret = H5Ldelete(file_id, "dset2", H5P_DEFAULT);
    CHECK_I(ret, "H5Ldelete");

    /* Close the file and get its size */
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");
    deleted_filesize = h5_get_file_size(FILENAME, H5P_DEFAULT);

    VERIFY(deleted_filesize, initial_filesize, "h5_get_file_size");

    /* Cleanup */
    ret = H5Sclose(dspace_id);
    CHECK_I(ret, "H5Sclose");

    /* Retrieve current # of errors */
    if (old_nerrs == GetTestNumErrs())
        return (0);
    else
        return (-1);
} /* verify_dset_create_and_delete_does_not_grow_file */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_delete_revert
 *
 * Purpose:     Verifies that creation and deletion of datasets with shared
 *              message headers will not increase file size.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_delete_revert(void)
{
    hid_t  fcpl_id;
    herr_t ret;

    MESSAGE(5, ("Testing that file reverts to original size on SOHM deletion\n"));

    /* Create an fcpl with messages in two indexes */
    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 2);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_DTYPE_FLAG, 10);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_index(fcpl_id, 1, H5O_SHMESG_SDSPACE_FLAG, 10);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    /* Call the helper function to test this FCPL. */
    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    /* Try using B-trees */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    /* Try sharing all messages */
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 10);
    CHECK_I(ret, "H5Pset_shared_mesg_index");
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 10, 5);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    /* Try using B-trees */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    /* There should be at least two messages in the test (datatype and
     * dataspace).  Use an index that will transition from a list to
     * a B-tree and back.
     */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 1, 2);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    /* Try with shared messages enabled, but when messages are too big
     * to be shared.
     */
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 35);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");
    ret = verify_dset_create_and_delete_does_not_grow_file(fcpl_id);
    CHECK_I(ret, "verify_dset_create_and_delete_does_not_grow_file");

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");
} /* test_sohm_delete_revert */

/*-------------------------------------------------------------------------
 * Function:    verify_dset_create_and_open_through_extlink_with_sohm
 *
 * Purpose:     Tests that a dataset created through an external link can
 *              be opened (that shared messages were created or not and
 *              were shared in the right file).
 *
 *-------------------------------------------------------------------------
 */
static void
verify_dset_create_and_open_through_extlink_with_sohm(hid_t src_fcpl_id, hid_t dst_fcpl_id)
{
    hid_t   src_file_id = H5I_INVALID_HID;
    hid_t   dst_file_id = H5I_INVALID_HID;
    hid_t   space_id    = H5I_INVALID_HID;
    hid_t   dset_id     = H5I_INVALID_HID;
    hsize_t dims[]      = {1, 1};
    herr_t  ret;

    /* Create files */
    src_file_id = H5Fcreate(FILENAME_SRC, H5F_ACC_TRUNC, src_fcpl_id, H5P_DEFAULT);
    CHECK_I(src_file_id, "H5Fcreate");
    dst_file_id = H5Fcreate(FILENAME_DST, H5F_ACC_TRUNC, dst_fcpl_id, H5P_DEFAULT);
    CHECK_I(dst_file_id, "H5Fcreate");

    /* Create an external link from the source file to the destination file */
    ret = H5Lcreate_external(FILENAME_DST, "/", src_file_id, "ext_link", H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(ret, "H5Lcreate_external");

    /* Create a dataset through the external link */
    space_id = H5Screate_simple(2, dims, dims);
    CHECK_I(space_id, "H5Screate_simple");
    dset_id = H5Dcreate2(src_file_id, "ext_link/dataset", H5T_NATIVE_FLOAT, space_id, H5P_DEFAULT,
                         H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dcreate2");

    /* Close the dataset and both files to make sure everything gets flushed
     * out of memory
     */
    ret = H5Sclose(space_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Fclose(src_file_id);
    CHECK_I(ret, "H5Fclose");
    ret = H5Fclose(dst_file_id);
    CHECK_I(ret, "H5Fclose");

    /* Ensure that the dataset can be opened.  If the messages were written in
     * the wrong file, it'll be impossible to read the dataset's object
     * header.
     */
    dst_file_id = H5Fopen(FILENAME_DST, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK_I(dst_file_id, "H5Fopen");
    dset_id = H5Dopen2(dst_file_id, "dataset", H5P_DEFAULT);
    CHECK_I(dset_id, "H5Dopen2");

    /* Cleanup */
    ret = H5Dclose(dset_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Fclose(dst_file_id);
    CHECK_I(ret, "H5Fclose");
} /* verify_dset_create_and_open_through_extlink_with_sohm */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_extlink
 *
 * Purpose:     Test creating SOHMs through external links (to make sure that
 *              they're created in the correct file).
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_extlink(void)
{
    hid_t  fcpl_id = H5I_INVALID_HID;
    bool   driver_is_default_compatible;
    herr_t ret;

    MESSAGE(5, ("Testing SOHM creation through external links\n"));

    ret = h5_driver_is_default_vfd_compatible(H5P_DEFAULT, &driver_is_default_compatible);
    CHECK_I(ret, "h5_driver_is_default_vfd_compatible");

    if (!driver_is_default_compatible) {
        printf("-- SKIPPED --\n");
        return;
    }

    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    verify_dset_create_and_open_through_extlink_with_sohm(fcpl_id, H5P_DEFAULT);
    verify_dset_create_and_open_through_extlink_with_sohm(H5P_DEFAULT, fcpl_id);
    verify_dset_create_and_open_through_extlink_with_sohm(fcpl_id, fcpl_id);

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");
} /* test_sohm_extlink */

/*-------------------------------------------------------------------------
 * Function:    verify_dataset_extension
 *
 * Purpose:     Tests extending a dataset's dataspace when sharing is
 *              enabled.
 *
 *              If close_reopen is true, closes and reopens the file to
 *              ensure that data is correctly written to disk.
 *
 *-------------------------------------------------------------------------
 */
static int
verify_dataset_extension(hid_t fcpl_id, bool close_reopen)
{
    hid_t   file_id       = H5I_INVALID_HID;
    hid_t   orig_space_id = H5I_INVALID_HID;
    hid_t   space1_id, space2_id, space3_id;
    hid_t   dcpl_id = H5I_INVALID_HID;
    hid_t   dset1_id, dset2_id = H5I_INVALID_HID, dset3_id = H5I_INVALID_HID;
    hsize_t dims1[]    = {1, 2};
    hsize_t max_dims[] = {H5S_UNLIMITED, 2};
    hsize_t dims2[]    = {5, 2};
    hsize_t out_dims[2];
    hsize_t out_maxdims[2];
    int     x;
    int     old_nerrs; /* Number of errors when entering this routine */
    herr_t  ret;

    hsize_t *space_dims[3];

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 * Macro:      TSOHM_VDE_VERIFY_SPACES
 *
 * Purpose:    Encapsulate a common pattern
 *             Open, read-verify, and close the dataspaces for datasets 1-3
 *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 */
#define TSOHM_VDE_VERIFY_SPACES(dims)                                                                        \
    do {                                                                                                     \
        /* Open dataspaces                                                                                   \
         */                                                                                                  \
        space1_id = H5Dget_space(dset1_id);                                                                  \
        CHECK_I(space1_id, "H5Dget_space");                                                                  \
        space2_id = H5Dget_space(dset2_id);                                                                  \
        CHECK_I(space2_id, "H5Dget_space");                                                                  \
        space3_id = H5Dget_space(dset3_id);                                                                  \
        CHECK_I(space3_id, "H5Dget_space");                                                                  \
        /* Verify dataspaces                                                                                 \
         */                                                                                                  \
        ret = H5Sget_simple_extent_dims(space1_id, out_dims, out_maxdims);                                   \
        CHECK_I(ret, "H5Sget_simple_extent_dims");                                                           \
        for (x = 0; x < EXTEND_NDIMS; ++x) {                                                                 \
            VERIFY(out_dims[x], (dims)[0][x], "H5Sget_simple_extent_dims");                                  \
            VERIFY(out_maxdims[x], max_dims[x], "H5Sget_simple_extent_dims");                                \
        }                                                                                                    \
        ret = H5Sget_simple_extent_dims(space2_id, out_dims, out_maxdims);                                   \
        CHECK_I(ret, "H5Sget_simple_extent_dims");                                                           \
        for (x = 0; x < EXTEND_NDIMS; ++x) {                                                                 \
            VERIFY(out_dims[x], (dims)[1][x], "H5Sget_simple_extent_dims");                                  \
            VERIFY(out_maxdims[x], max_dims[x], "H5Sget_simple_extent_dims");                                \
        }                                                                                                    \
        ret = H5Sget_simple_extent_dims(space3_id, out_dims, out_maxdims);                                   \
        CHECK_I(ret, "H5Sget_simple_extent_dims");                                                           \
        for (x = 0; x < EXTEND_NDIMS; ++x) {                                                                 \
            VERIFY(out_dims[x], (dims)[2][x], "H5Sget_simple_extent_dims");                                  \
            VERIFY(out_maxdims[x], max_dims[x], "H5Sget_simple_extent_dims");                                \
        }                                                                                                    \
        /* Close dataspaces                                                                                  \
         */                                                                                                  \
        CHECK_I(H5Sclose(space1_id), "H5Sclose");                                                            \
        CHECK_I(H5Sclose(space2_id), "H5Sclose");                                                            \
        CHECK_I(H5Sclose(space3_id), "H5Sclose");                                                            \
    } while (0) /* define TSOHM_VDE_VERIFY_SPACES */

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 * Macro:      TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS()
 *
 * Purpose:    Encapsulate a common pattern
 *             Wrapper to close and reopen file and datasets:
 *                + "dataset" (dset_id)
 *                + if n > 1 then include "dataset2" (dset_id2)
 *                + if n > 2 then include "dataset3" (dset_id3)
 *                + file (file_id)
 *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 */
#define TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(n)                                                             \
    do {                                                                                                     \
        CHECK_I(H5Dclose(dset1_id), "H5Dclose");                                                             \
        if ((n) > 1)                                                                                         \
            CHECK_I(H5Dclose(dset2_id), "H5Dclose");                                                         \
        if ((n) > 2)                                                                                         \
            CHECK_I(H5Dclose(dset3_id), "H5Dclose");                                                         \
        CHECK_I(H5Fclose(file_id), "H5Fclose");                                                              \
                                                                                                             \
        file_id = H5Fopen(FILENAME, H5F_ACC_RDWR, H5P_DEFAULT);                                              \
        CHECK_I(file_id, "H5Fopen");                                                                         \
        dset1_id = H5Dopen2(file_id, "dataset", H5P_DEFAULT);                                                \
        CHECK_I(dset1_id, "H5Dopen2");                                                                       \
        if ((n) > 1) {                                                                                       \
            dset2_id = H5Dopen2(file_id, "dataset2", H5P_DEFAULT);                                           \
            CHECK_I(dset2_id, "H5Dopen2");                                                                   \
        }                                                                                                    \
        if ((n) > 2) {                                                                                       \
            dset3_id = H5Dopen2(file_id, "dataset3", H5P_DEFAULT);                                           \
            CHECK_I(dset3_id, "H5Dopen2");                                                                   \
        }                                                                                                    \
    } while (0) /* define TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS */

    /* Remember the current # of reported errors */
    old_nerrs = GetTestNumErrs();

    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");

    /* Create property list with chunking */
    dcpl_id = H5Pcreate(H5P_DATASET_CREATE);
    CHECK_I(dcpl_id, "H5Pcreate");
    ret = H5Pset_chunk(dcpl_id, 2, dims1);
    CHECK_I(ret, "H5Pset_chunk");

    /* Create a dataspace and a dataset*/
    orig_space_id = H5Screate_simple(EXTEND_NDIMS, dims1, max_dims);
    CHECK_I(orig_space_id, "H5Screate_simple");
    dset1_id =
        H5Dcreate2(file_id, "dataset", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset1_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(1);

    /* Create another dataset starting with the same dataspace */
    dset2_id =
        H5Dcreate2(file_id, "dataset2", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset2_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(2);

    /* Create a third dataset with the same dataspace */
    dset3_id =
        H5Dcreate2(file_id, "dataset3", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset3_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    /* Extend the first dataset */
    ret = H5Dset_extent(dset1_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    space_dims[0] = dims2;
    space_dims[1] = dims1;
    space_dims[2] = dims1;
    TSOHM_VDE_VERIFY_SPACES(space_dims);

    /* Extend the second dataset */
    ret = H5Dset_extent(dset2_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    space_dims[1] = dims2;
    TSOHM_VDE_VERIFY_SPACES(space_dims);

    /* Extend the third dataset */
    ret = H5Dset_extent(dset3_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    space_dims[2] = dims2;
    TSOHM_VDE_VERIFY_SPACES(space_dims);

    /* Close the datasets and file */
    ret = H5Dclose(dset1_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Dclose(dset2_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Dclose(dset3_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");

    /* Change the order in which datasets are extended to ensure that there
     * are no problems if a dataspace goes from being shared to not being
     * shared or vice versa.
     */
    file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, fcpl_id, H5P_DEFAULT);
    CHECK_I(file_id, "H5Fcreate");
    dset1_id =
        H5Dcreate2(file_id, "dataset", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset1_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(1);

    /* Extend the first dataset */
    ret = H5Dset_extent(dset1_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(1);

    /* Create the second dataset.  Its dataspace will be unshared and then
     * become shared when extended.
     */
    dset2_id =
        H5Dcreate2(file_id, "dataset2", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset2_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(2);

    /* Extend the second dataset */
    ret = H5Dset_extent(dset2_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(2);

    /* Create the third dataset.  Its dataspace will be unshared and then
     * become shared when extended.
     */
    dset3_id =
        H5Dcreate2(file_id, "dataset3", H5T_NATIVE_LONG, orig_space_id, H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
    CHECK_I(dset3_id, "H5Dcreate2");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    /* Extend the third dataset */
    ret = H5Dset_extent(dset3_id, dims2);
    CHECK_I(ret, "H5Dset_extent");
    if (close_reopen)
        TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS(3);

    TSOHM_VDE_VERIFY_SPACES(space_dims);

    /* Close the datasets and file */
    ret = H5Dclose(dset1_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Dclose(dset2_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Dclose(dset3_id);
    CHECK_I(ret, "H5Dclose");
    ret = H5Fclose(file_id);
    CHECK_I(ret, "H5Fclose");

    /* Cleanup */
    ret = H5Sclose(orig_space_id);
    CHECK_I(ret, "H5Sclose");
    ret = H5Pclose(dcpl_id);
    CHECK_I(ret, "H5Pclose");

    /* Complain if this test generated errors */
    if (old_nerrs == GetTestNumErrs())
        return (0);
    else
        return (-1);
/* macros are exclusive to this function */
#undef TSOHM_VDE_CLOSE_REOPEN_FILE_AND_DSETS
#undef TSOHM_VDE_VERIFY_SPACES
} /* verify_dataset_extension */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_extend_dset
 *
 * Purpose:     Test extended shared dataspaces.  An extended dataset's
 *              dataspace will change, possibly confusing the shared message
 *              code.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_extend_dset(void)
{
    hid_t  fcpl_id = H5I_INVALID_HID;
    herr_t ret;

    MESSAGE(5, ("Testing extending shared dataspaces\n"));

    fcpl_id = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl_id, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl_id, 1);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");

    /* No shared messages */
    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    /* Only dataspaces */
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_SDSPACE_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    /* All messages */
    ret = H5Pset_shared_mesg_index(fcpl_id, 0, H5O_SHMESG_ALL_FLAG, 16);
    CHECK_I(ret, "H5Pset_shared_mesg_index");

    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    /* All messages in lists */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 100, 50);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    /* All messages in lists converted to B-trees */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 1, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    /* All messages in B-trees */
    ret = H5Pset_shared_mesg_phase_change(fcpl_id, 0, 0);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    ret = verify_dataset_extension(fcpl_id, false);
    CHECK_I(ret, "verify_dataset_extension");
    ret = verify_dataset_extension(fcpl_id, true);
    CHECK_I(ret, "verify_dataset_extension");

    ret = H5Pclose(fcpl_id);
    CHECK_I(ret, "H5Pclose");
} /* test_sohm_extend_dset */

/*-------------------------------------------------------------------------
 * Function:    test_sohm_external_dtype
 *
 * Purpose:     When a datatype is a SOHM type in one file, test that the
 *              second file using the same datatype actually save it in
 *              the file, too.
 *
 *-------------------------------------------------------------------------
 */
static void
test_sohm_external_dtype(void)
{
    typedef struct s1_t {
        int a;
        int b;
    } s1_t;
    s1_t       *s_ptr, *orig;
    hid_t       fcpl, file1, file2;
    hid_t       dataset1, dataset2;
    hid_t       s1_tid, dset1_tid, dset2_tid, space;
    hsize_t     dims[2] = {NX, NY};
    H5T_class_t dtype_class;
    size_t      dmsg_count;
    unsigned    x, i;
    herr_t      ret;

    MESSAGE(5, ("Testing shared external datatype\n"));

    fcpl = H5Pcreate(H5P_FILE_CREATE);
    CHECK_I(fcpl, "H5Pcreate");
    ret = H5Pset_shared_mesg_nindexes(fcpl, TEST_NUM_INDEXES);
    CHECK_I(ret, "H5Pset_shared_mesg_nindexes");
    for (x = 0; x < TEST_NUM_INDEXES; ++x) {
        ret = H5Pset_shared_mesg_index(fcpl, x, test_type_flags[x], test_minsizes[x]);
        CHECK_I(ret, "H5Pset_shared_mesg_index");
    }
    ret = H5Pset_shared_mesg_phase_change(fcpl, TEST_L2B, TEST_B2L);
    CHECK_I(ret, "H5Pset_shared_mesg_phase_change");

    space = H5Screate_simple(2, dims, NULL);
    CHECK_I(space, "H5Screate_simple");

    s1_tid = H5Tcreate(H5T_COMPOUND, sizeof(s1_t));
    CHECK_I(s1_tid, "H5Tcreate");
    ret = H5Tinsert(s1_tid, "a", HOFFSET(s1_t, a), H5T_NATIVE_INT);
    CHECK_I(ret, "H5Tinsert");
    ret = H5Tinsert(s1_tid, "b", HOFFSET(s1_t, b), H5T_NATIVE_INT);
    CHECK_I(ret, "H5Tinsert");

    /* Set up dataset in first file */
    file1 = H5Fcreate(FILENAME_SRC, H5F_ACC_TRUNC, fcpl, H5P_DEFAULT);
    CHECK_I(file1, "H5Fcreate");

    /* Check on datatype storage status. It should be zero now. */
    ret = H5F__get_sohm_mesg_count_test(file1, H5O_DTYPE_ID, &dmsg_count);
    CHECK(ret, FAIL, "H5F__get_sohm_mesg_count_test");
    VERIFY(dmsg_count, 0, "H5F__get_sohm_mesg_count_test");

    dataset1 = H5Dcreate2(file1, "dataset_1", s1_tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dataset1, "H5Dcreate2");

    /* Check on datatype storage status.  It should be 1 now. */
    ret = H5F__get_sohm_mesg_count_test(file1, H5O_DTYPE_ID, &dmsg_count);
    CHECK(ret, FAIL, "H5F__get_sohm_mesg_count_test");
    VERIFY(dmsg_count, 1, "H5F__get_sohm_mesg_count_test");

    dset1_tid = H5Dget_type(dataset1);
    CHECK_I(dset1_tid, "H5Dget_type");

    /* Allocate space and initialize data */
    orig = (s1_t *)malloc(NX * NY * sizeof(s1_t));
    if (orig == NULL)
        CHECK_I(-1, "malloc");
    for (i = 0; i < NX * NY; i++) {
        s_ptr    = (s1_t *)orig + i;
        s_ptr->a = (int)(i * 3 + 1);
        s_ptr->b = (int)(i * 3 + 2);
    }

    ret = H5Dwrite(dataset1, s1_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, orig);
    CHECK_I(ret, "H5Dwrite");
    ret = H5Dclose(dataset1);
    CHECK_I(ret, "H5Dclose");

    /* Create dataset in second file using datatype from dataset in the first file */
    file2 = H5Fcreate(FILENAME_DST, H5F_ACC_TRUNC, fcpl, H5P_DEFAULT);
    CHECK_I(file2, "H5Fcreate");

    /* Check on datatype storage status. It should be zero now. */
    ret = H5F__get_sohm_mesg_count_test(file2, H5O_DTYPE_ID, &dmsg_count);
    CHECK(ret, FAIL, "H5F__get_sohm_mesg_count_test");
    VERIFY(dmsg_count, 0, "H5F__get_sohm_mesg_count_test");

    dataset2 = H5Dcreate2(file2, "dataset_2", dset1_tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK_I(dataset2, "H5Dcreate2");

    /* Check on datatype storage status.  It should be 1 now. */
    ret = H5F__get_sohm_mesg_count_test(file2, H5O_DTYPE_ID, &dmsg_count);
    CHECK(ret, FAIL, "H5F__get_sohm_mesg_count_test");
    VERIFY(dmsg_count, 1, "H5F__get_sohm_mesg_count_test");

    ret = H5Dwrite(dataset2, s1_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, orig);
    CHECK_I(ret, "H5Dwrite");

    /* Close references to the first file */
    ret = H5Dclose(dataset2);
    CHECK_I(ret, "H5Dclose");
    ret = H5Tclose(dset1_tid);
    CHECK_I(ret, "H5Tclose");
    ret = H5Fclose(file1);
    CHECK_I(ret, "H5Fclose");

    /* Verify that datatype details are still accessible by second file */
    dataset2 = H5Dopen2(file2, "dataset_2", H5P_DEFAULT);
    CHECK_I(dataset2, "H5Dopen2");

    dset2_tid = H5Dget_type(dataset2);
    CHECK_I(dset2_tid, "H5Dget_type");

    dtype_class = H5Tget_class(dset2_tid);
    VERIFY(dtype_class, H5T_COMPOUND, "H5Tget_class");

    /* Cleanup */
    ret = H5Tclose(dset2_tid);
    CHECK_I(ret, "H5Tclose");
    ret = H5Dclose(dataset2);
    CHECK_I(ret, "H5Dclose");
    ret = H5Sclose(space);
    CHECK_I(ret, "H5Sclose");
    ret = H5Tclose(s1_tid);
    CHECK_I(ret, "H5Tclose");
    ret = H5Pclose(fcpl);
    CHECK_I(ret, "H5Pclose");
    ret = H5Fclose(file2);
    CHECK_I(ret, "H5Fclose");
    free(orig);
} /* test_sohm_external_dtype */

/****************************************************************
**
**  test_sohm(): Main Shared Object Header Message testing routine.
**
****************************************************************/
void
test_sohm(void)
{
    const char *env_h5_drvr;
    bool        vol_is_native;
    bool        default_driver;

    MESSAGE(5, ("Testing Shared Object Header Messages\n"));

    /* Check if native VOL is being used */
    CHECK(h5_using_native_vol(H5P_DEFAULT, H5I_INVALID_HID, &vol_is_native), FAIL, "h5_using_native_vol");
    if (!vol_is_native) {
        MESSAGE(5, (" -- SKIPPED --\n"));
        return;
    }

    /* Get the VFD to use */
    env_h5_drvr = getenv(HDF5_DRIVER);
    if (env_h5_drvr == NULL)
        env_h5_drvr = "nomatch";

    default_driver = h5_using_default_driver(env_h5_drvr);

    test_sohm_fcpl();        /* Test SOHMs and file creation plists */
    test_sohm_fcpl_errors(); /* Bogus H5P* calls for SOHMs */

    /* Only run this test with sec2/default driver */
    if (default_driver)
        test_sohm_size1(); /* Tests the sizes of files with one SOHM */

#if 0                  /* TODO: REVEALS BUG TO BE FIXED - SEE JIRA HDFFV-10645 */
    test_sohm_size_consistency_open_create();
#endif                 /* Jira HDFFV-10645 */
    test_sohm_attrs(); /* Tests shared messages in attributes */

    /* Only run these tests with sec2/default driver */
    if (default_driver) {
        test_sohm_size2(0); /* Tests the sizes of files with multiple SOHMs */
        test_sohm_size2(1); /* Tests the sizes of files with multiple
                             * SOHMs, closing and reopening file after
                             * each write. */
    }

    test_sohm_delete();        /* Test deleting shared messages */
    test_sohm_delete_revert(); /* Test that a file with SOHMs becomes an
                                * empty file again when they are deleted. */

    test_sohm_extlink(); /* Test SOHMs when external links are used */

    test_sohm_extend_dset();    /* Test extending shared datasets */
    test_sohm_external_dtype(); /* Test using datatype in another file */
} /* test_sohm */

/*-------------------------------------------------------------------------
 * Function:    cleanup_sohm
 *
 * Purpose:     Cleanup temporary test files
 *
 * Return:      none
 *
 *-------------------------------------------------------------------------
 */
void
cleanup_sohm(void)
{
    HDremove(FILENAME);
    HDremove(FILENAME_SRC);
    HDremove(FILENAME_DST);
} /* cleanup_sohm */