path: root/src/H5FDmulti.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * 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://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:	Robb Matzke <matzke@llnl.gov>
 *		Monday, November 10, 1997
 *
 * Purpose:	Implements a file driver which dispatches I/O requests to
 *		other file drivers depending on the purpose of the address
 *		region being accessed. For instance, all meta-data could be
 *		place in one file while all raw data goes to some other file.
 *		This also serves as an example of coding a complex file driver,
 *		therefore, it should not use any non-public definitions.
 */
#include <assert.h>
#include <stdlib.h>
#include <string.h>

#include "hdf5.h"


#ifndef FALSE
#define FALSE		0
#endif
#ifndef TRUE
#define TRUE		1
#endif

/* Loop through all mapped files */
#define UNIQUE_MEMBERS_CORE(MAP, ITER, SEEN, LOOPVAR) {					      \
    H5FD_mem_t ITER, LOOPVAR;					      \
    unsigned SEEN[H5FD_MEM_NTYPES];					      \
									      \
    memset(SEEN, 0, sizeof SEEN);	      				      \
    for (ITER=H5FD_MEM_SUPER; ITER<H5FD_MEM_NTYPES; ITER=(H5FD_mem_t)(ITER+1)) {  \
	LOOPVAR = MAP[ITER];					      \
	if (H5FD_MEM_DEFAULT==LOOPVAR) LOOPVAR=ITER;		      \
	assert(LOOPVAR>0 && LOOPVAR<H5FD_MEM_NTYPES);			      \
	if (SEEN[LOOPVAR]++) continue;					      \

/* Need two front-ends, since they are nested sometimes */
#define UNIQUE_MEMBERS(MAP, LOOPVAR)                                          \
    UNIQUE_MEMBERS_CORE(MAP, _unmapped, _seen, LOOPVAR)
#define UNIQUE_MEMBERS2(MAP, LOOPVAR)                                         \
    UNIQUE_MEMBERS_CORE(MAP, _unmapped2, _seen2, LOOPVAR)

#define ALL_MEMBERS(LOOPVAR) {						      \
    H5FD_mem_t LOOPVAR;							      \
    for (LOOPVAR=H5FD_MEM_DEFAULT; LOOPVAR<H5FD_MEM_NTYPES; LOOPVAR=(H5FD_mem_t)(LOOPVAR+1)) {


#define END_MEMBERS	}}

#define H5FD_MULT_MAX_FILE_NAME_LEN     1024

/* The driver identification number, initialized at runtime */
static hid_t H5FD_MULTI_g = 0;

/* Driver-specific file access properties */
typedef struct H5FD_multi_fapl_t {
    H5FD_mem_t  memb_map[H5FD_MEM_NTYPES];      /*memory usage map              */
    hid_t       memb_fapl[H5FD_MEM_NTYPES];     /*member access properties      */
    char        *memb_name[H5FD_MEM_NTYPES];    /*name generators               */
    haddr_t     memb_addr[H5FD_MEM_NTYPES];     /*starting addr per member      */
    hbool_t     relax;                          /*less stringent error checking	*/
} H5FD_multi_fapl_t;

/*
 * The description of a file belonging to this driver. The file access
 * properties and member names do not have to be copied into this struct
 * since they will be held open by the file access property list which is
 * copied into the parent file struct in H5F_open().
 */
typedef struct H5FD_multi_t {
    H5FD_t              pub;                        /*public stuff, must be first               */
    H5FD_multi_fapl_t   fa;                         /*driver-specific file access properties    */
    haddr_t             memb_next[H5FD_MEM_NTYPES]; /*addr of next member                       */
    H5FD_t             *memb[H5FD_MEM_NTYPES];      /*member pointers                           */
    haddr_t             memb_eoa[H5FD_MEM_NTYPES];  /*EOA for individual files,
                                                     *end of allocated addresses.  v1.6 library
                                                     *have the EOA for the entire file. But it's
                                                     *meaningless for MULTI file.  We replaced it
                                                     *with the EOAs for individual files        */
    unsigned            flags;                      /*file open flags saved for debugging       */
    char               *name;                       /*name passed to H5Fopen or H5Fcreate       */
} H5FD_multi_t;

/* Driver specific data transfer properties */
typedef struct H5FD_multi_dxpl_t {
    hid_t	memb_dxpl[H5FD_MEM_NTYPES];/*member data xfer properties*/
} H5FD_multi_dxpl_t;

/* Private functions */
static char *my_strdup(const char *s);
static int compute_next(H5FD_multi_t *file);
static int open_members(H5FD_multi_t *file);

/* Callback prototypes */
static herr_t H5FD_multi_term(void);
static hsize_t H5FD_multi_sb_size(H5FD_t *file);
static herr_t H5FD_multi_sb_encode(H5FD_t *file, char *name/*out*/,
				   unsigned char *buf/*out*/);
static herr_t H5FD_multi_sb_decode(H5FD_t *file, const char *name,
				   const unsigned char *buf);
static void *H5FD_multi_fapl_get(H5FD_t *file);
static void *H5FD_multi_fapl_copy(const void *_old_fa);
static herr_t H5FD_multi_fapl_free(void *_fa);
static H5FD_t *H5FD_multi_open(const char *name, unsigned flags,
			       hid_t fapl_id, haddr_t maxaddr);
static herr_t H5FD_multi_close(H5FD_t *_file);
static int H5FD_multi_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
static herr_t H5FD_multi_query(const H5FD_t *_f1, unsigned long *flags);
static herr_t H5FD_multi_get_type_map(const H5FD_t *file, H5FD_mem_t *type_map);
static haddr_t H5FD_multi_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
static herr_t H5FD_multi_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa);
static haddr_t H5FD_multi_get_eof(const H5FD_t *_file, H5FD_mem_t type);
static herr_t  H5FD_multi_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
static haddr_t H5FD_multi_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
static herr_t H5FD_multi_free(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
			      hsize_t size);
static herr_t H5FD_multi_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
			      size_t size, void *_buf/*out*/);
static herr_t H5FD_multi_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
			       size_t size, const void *_buf);
static herr_t H5FD_multi_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
static herr_t H5FD_multi_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
static herr_t H5FD_multi_lock(H5FD_t *_file, hbool_t rw);
static herr_t H5FD_multi_unlock(H5FD_t *_file);

/* The class struct */
static const H5FD_class_t H5FD_multi_g = {
    "multi",					/*name			*/
    HADDR_MAX,					/*maxaddr		*/
    H5F_CLOSE_WEAK,				/* fc_degree		*/
    H5FD_multi_term,                            /*terminate             */
    H5FD_multi_sb_size,				/*sb_size		*/
    H5FD_multi_sb_encode,			/*sb_encode		*/
    H5FD_multi_sb_decode,			/*sb_decode		*/
    sizeof(H5FD_multi_fapl_t),			/*fapl_size		*/
    H5FD_multi_fapl_get,			/*fapl_get		*/
    H5FD_multi_fapl_copy,			/*fapl_copy		*/
    H5FD_multi_fapl_free,			/*fapl_free		*/
    0,						/*dxpl_size		*/
    NULL,					/*dxpl_copy		*/
    NULL,					/*dxpl_free		*/
    H5FD_multi_open,				/*open			*/
    H5FD_multi_close,				/*close			*/
    H5FD_multi_cmp,				/*cmp			*/
    H5FD_multi_query,				/*query			*/
    H5FD_multi_get_type_map,			/*get_type_map		*/
    H5FD_multi_alloc,				/*alloc			*/
    H5FD_multi_free,				/*free			*/
    H5FD_multi_get_eoa,				/*get_eoa		*/
    H5FD_multi_set_eoa,				/*set_eoa		*/
    H5FD_multi_get_eof,				/*get_eof		*/
    H5FD_multi_get_handle,                      /*get_handle            */
    H5FD_multi_read,				/*read			*/
    H5FD_multi_write,				/*write			*/
    NULL,                                       /*read_vector           */
    NULL,                                       /*write_vector          */
    H5FD_multi_flush,				/*flush			*/
    H5FD_multi_truncate,			/*truncate		*/
    H5FD_multi_lock,                            /*lock                  */
    H5FD_multi_unlock,                          /*unlock                */
    H5FD_FLMAP_DEFAULT 				/*fl_map		*/
};


/*-------------------------------------------------------------------------
 * Function:	my_strdup
 *
 * Purpose:	Private version of strdup()
 *
 * Return:	Success:	Ptr to new copy of string
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Friday, August 13, 1999
 *
 *-------------------------------------------------------------------------
 */
static char *
my_strdup(const char *s)
{
    char *x;
    size_t str_len;

    if(!s)
        return NULL;
    str_len = strlen(s) + 1;
    if(NULL == (x = (char *)malloc(str_len)))
        return NULL;
    memcpy(x, s, str_len);

    return x;
}


/*-------------------------------------------------------------------------
 * Function:    H5FD_multi_init
 *
 * Purpose:     Initialize this driver by registering the driver with the
 *              library.
 *
 * Return:      Success:    The driver ID for the multi driver
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:  Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5FD_multi_init(void)
{
    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    if(H5I_VFL != H5Iget_type(H5FD_MULTI_g))
        H5FD_MULTI_g = H5FDregister(&H5FD_multi_g);

    return H5FD_MULTI_g;
} /* end H5FD_multi_init() */


/*---------------------------------------------------------------------------
 * Function:	H5FD_multi_term
 *
 * Purpose:	Shut down the VFD
 *
 * Returns:     Non-negative on success or negative on failure
 *
 * Programmer:  Quincey Koziol
 *              Friday, Jan 30, 2004
 *
 *---------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_term(void)
{
    /* Reset VFL ID */
    H5FD_MULTI_g=0;

    return 0;
} /* end H5FD_multi_term() */


/*-------------------------------------------------------------------------
 * Function:	H5Pset_fapl_split
 *
 * Purpose:	Compatibility function. Makes the multi driver act like the
 *		old split driver which stored meta data in one file and raw
 *		data in another file.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August 11, 1999
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pset_fapl_split(hid_t fapl, const char *meta_ext, hid_t meta_plist_id,
		  const char *raw_ext, hid_t raw_plist_id)
{
    H5FD_mem_t		memb_map[H5FD_MEM_NTYPES];
    hid_t		memb_fapl[H5FD_MEM_NTYPES];
    const char		*memb_name[H5FD_MEM_NTYPES];
    char		meta_name[H5FD_MULT_MAX_FILE_NAME_LEN];
    char		raw_name[H5FD_MULT_MAX_FILE_NAME_LEN];
    haddr_t		memb_addr[H5FD_MEM_NTYPES];

    /*NO TRACE*/

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Initialize */
    ALL_MEMBERS(mt) {
	/* Treat global heap as raw data, not metadata */
	memb_map[mt] = ((mt == H5FD_MEM_DRAW || mt == H5FD_MEM_GHEAP) ? H5FD_MEM_DRAW : H5FD_MEM_SUPER);
	memb_fapl[mt] = -1;
	memb_name[mt] = NULL;
	memb_addr[mt] = HADDR_UNDEF;
    } END_MEMBERS;

    /* The file access properties */
    memb_fapl[H5FD_MEM_SUPER] = meta_plist_id;
    memb_fapl[H5FD_MEM_DRAW] = raw_plist_id;

    /* The names */
    /* process meta filename */
    if(meta_ext) {
	if(strstr(meta_ext, "%s")) {
            /* Note: this doesn't accommodate for when the '%s' in the user's
             *  string is at a position >sizeof(meta_name) - QK & JK - 2013/01/17
             */
	    strncpy(meta_name, meta_ext, sizeof(meta_name));
            meta_name[sizeof(meta_name) - 1] = '\0';
        }
	else
	    sprintf(meta_name, "%%s%s", meta_ext);
    }
    else {
	strncpy(meta_name, "%s.meta", sizeof(meta_name));
        meta_name[sizeof(meta_name) - 1] = '\0';
    }
    memb_name[H5FD_MEM_SUPER] = meta_name;

    /* process raw filename */
    if(raw_ext) {
	if(strstr(raw_ext, "%s")) {
            /* Note: this doesn't accommodate for when the '%s' in the user's
             *  string is at a position >sizeof(raw_name) - QK & JK - 2013/01/17
             */
	    strncpy(raw_name, raw_ext, sizeof(raw_name));
            raw_name[sizeof(raw_name) - 1] = '\0';
        }
	else
	    sprintf(raw_name, "%%s%s", raw_ext);
    }
    else {
	strncpy(raw_name, "%s.raw", sizeof(raw_name));
        raw_name[sizeof(raw_name) - 1] = '\0';
    }
    memb_name[H5FD_MEM_DRAW] = raw_name;

    /* The sizes */
    memb_addr[H5FD_MEM_SUPER] = 0;
    memb_addr[H5FD_MEM_DRAW] = HADDR_MAX/2;

    return H5Pset_fapl_multi(fapl, memb_map, memb_fapl, memb_name, memb_addr, TRUE);
}


/*-------------------------------------------------------------------------
 * Function:	H5Pset_fapl_multi
 *
 * Purpose:	Sets the file access property list FAPL_ID to use the multi
 *		driver. The MEMB_MAP array maps memory usage types to other
 *		memory usage types and is the mechanism which allows the
 *		caller to specify how many files are created. The array
 *		contains H5FD_MEM_NTYPES entries which are either the value
 *		H5FD_MEM_DEFAULT or a memory usage type and the number of
 *		unique values determines the number of files which are
 *		opened.  For each memory usage type which will be associated
 *		with a file the MEMB_FAPL array should have a property list
 *		and the MEMB_NAME array should be a name generator (a
 *		printf-style format with a %s which will be replaced with the
 *		name passed to H5FDopen(), usually from H5Fcreate() or
 *		H5Fopen()).
 *
 *		If RELAX is set then opening an existing file for read-only
 *		access will not fail if some file members are missing.  This
 *		allows a file to be accessed in a limited sense if just the
 *		meta data is available.
 *
 * Defaults:	Default values for each of the optional arguments are:
 *
 *		memb_map:	The default member map has the value
 *				H5FD_MEM_DEFAULT for each element.
 *
 * 		memb_fapl:	The value H5P_DEFAULT for each element.
 *
 *		memb_name:	The string `%s-X.h5' where `X' is one of the
 *				letters `s' (H5FD_MEM_SUPER),
 *				`b' (H5FD_MEM_BTREE), `r' (H5FD_MEM_DRAW),
 * 				`g' (H5FD_MEM_GHEAP), 'l' (H5FD_MEM_LHEAP),
 * 				`o' (H5FD_MEM_OHDR).
 *
 * 		memb_addr:	The value HADDR_UNDEF for each element.
 *
 *
 * Example:	To set up a multi file access property list which partitions
 *		data into meta and raw files each being 1/2 of the address
 *		space one would say:
 *
 * 		    H5FD_mem_t mt, memb_map[H5FD_MEM_NTYPES];
 *		    hid_t memb_fapl[H5FD_MEM_NTYPES];
 *		    const char *memb[H5FD_MEM_NTYPES];
 *		    haddr_t memb_addr[H5FD_MEM_NTYPES];
 *
 * 		    // The mapping...
 * 		    for (mt=0; mt<H5FD_MEM_NTYPES; mt++) {
 *		        memb_map[mt] = H5FD_MEM_SUPER;
 *		    }
 * 		    memb_map[H5FD_MEM_DRAW] = H5FD_MEM_DRAW;
 *
 * 		    // Member information
 * 		    memb_fapl[H5FD_MEM_SUPER] = H5P_DEFAULT;
 *		    memb_name[H5FD_MEM_SUPER] = "%s.meta";
 *		    memb_addr[H5FD_MEM_SUPER] = 0;
 *
 *		    memb_fapl[H5FD_MEM_DRAW] = H5P_DEFAULT;
 *		    memb_name[H5FD_MEM_DRAW] = "%s.raw";
 *		    memb_addr[H5FD_MEM_DRAW] = HADDR_MAX/2;
 *
 * 		    hid_t fapl = H5Pcreate(H5P_FILE_ACCESS);
 *		    H5Pset_fapl_multi(fapl, memb_map, memb_fapl,
 *		                      memb_name, memb_addr, TRUE);
 *
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pset_fapl_multi(hid_t fapl_id, const H5FD_mem_t *memb_map,
		  const hid_t *memb_fapl, const char * const *memb_name,
		  const haddr_t *memb_addr, hbool_t relax)
{
    H5FD_multi_fapl_t	fa;
    H5FD_mem_t		mt, mmt;
    H5FD_mem_t		_memb_map[H5FD_MEM_NTYPES];
    hid_t		_memb_fapl[H5FD_MEM_NTYPES];
    char		_memb_name[H5FD_MEM_NTYPES][16];
    const char		*_memb_name_ptrs[H5FD_MEM_NTYPES];
    haddr_t		_memb_addr[H5FD_MEM_NTYPES];
    static const char	*letters = "Xsbrglo";
    static const char *func="H5FDset_fapl_multi";  /* Function Name for error reporting */

    /*NO TRACE*/

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Check arguments and supply default values */
    if(H5I_GENPROP_LST != H5Iget_type(fapl_id) ||
            TRUE != H5Pisa_class(fapl_id, H5P_FILE_ACCESS))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_PLIST, H5E_BADVALUE, "not an access list", -1)
    if (!memb_map) {
	for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1))
	    _memb_map[mt] = H5FD_MEM_DEFAULT;
	memb_map = _memb_map;
    }
    if (!memb_fapl) {
	for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1))
	    _memb_fapl[mt] = H5Pcreate(H5P_FILE_ACCESS);
	memb_fapl = _memb_fapl;
    }
    if (!memb_name) {
	assert(strlen(letters)==H5FD_MEM_NTYPES);
	for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1)) {
	    sprintf(_memb_name[mt], "%%s-%c.h5", letters[mt]);
	    _memb_name_ptrs[mt] = _memb_name[mt];
	}
	memb_name = _memb_name_ptrs;
    }
    if (!memb_addr) {
	for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1))
	    _memb_addr[mt] = (hsize_t)(mt ? (mt - 1) : 0) * (HADDR_MAX / (H5FD_MEM_NTYPES-1));
	memb_addr = _memb_addr;
    }

    for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1)) {
	/* Map usage type */
	mmt = memb_map[mt];
	if (mmt<0 || mmt>=H5FD_MEM_NTYPES)
            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADRANGE, "file resource type out of range", -1)
	if (H5FD_MEM_DEFAULT==mmt) mmt = mt;

	/*
	 * All members of MEMB_FAPL must be either defaults or actual file
	 * access property lists.
	 */
	if (H5P_DEFAULT!=memb_fapl[mmt] && TRUE!=H5Pisa_class(memb_fapl[mmt], H5P_FILE_ACCESS))
            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "file resource type incorrect", -1)

	/* All names must be defined */
	if (!memb_name[mmt] || !memb_name[mmt][0])
            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "file resource type not set", -1)
    }

    /*
     * Initialize driver specific information. No need to copy it into the FA
     * struct since all members will be copied by H5Pset_driver().
     */
    memset(&fa, 0, sizeof(H5FD_multi_fapl_t));
    memcpy(fa.memb_map, memb_map, H5FD_MEM_NTYPES*sizeof(H5FD_mem_t));
    memcpy(fa.memb_fapl, memb_fapl, H5FD_MEM_NTYPES*sizeof(hid_t));
    memcpy(fa.memb_name, memb_name, H5FD_MEM_NTYPES*sizeof(char*));
    memcpy(fa.memb_addr, memb_addr, H5FD_MEM_NTYPES*sizeof(haddr_t));
    fa.relax = relax;

    /* Patch up H5P_DEFAULT property lists for members */
    for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1)) {
        if(fa.memb_fapl[mt]==H5P_DEFAULT)
            fa.memb_fapl[mt] = H5Pcreate(H5P_FILE_ACCESS);
    }
    return H5Pset_driver(fapl_id, H5FD_MULTI, &fa);
}


/*-------------------------------------------------------------------------
 * Function:	H5Pget_fapl_multi
 *
 * Purpose:	Returns information about the multi file access property
 *		list though the function arguments which are the same as for
 *		H5Pset_fapl_multi() above.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pget_fapl_multi(hid_t fapl_id, H5FD_mem_t *memb_map/*out*/,
		  hid_t *memb_fapl/*out*/, char **memb_name/*out*/,
		  haddr_t *memb_addr/*out*/, hbool_t *relax)
{
    const H5FD_multi_fapl_t *fa;
    H5FD_mem_t		mt;
    static const char *func="H5FDget_fapl_multi";  /* Function Name for error reporting */

    /*NO TRACE*/

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    if(H5I_GENPROP_LST != H5Iget_type(fapl_id) ||
            TRUE != H5Pisa_class(fapl_id, H5P_FILE_ACCESS))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_PLIST, H5E_BADTYPE, "not an access list", -1)
    if(H5FD_MULTI != H5Pget_driver(fapl_id))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_PLIST, H5E_BADVALUE, "incorrect VFL driver", -1)
    if(NULL == (fa= (const H5FD_multi_fapl_t *)H5Pget_driver_info(fapl_id)))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_PLIST, H5E_BADVALUE, "bad VFL driver info", -1)

    if (memb_map)
        memcpy(memb_map, fa->memb_map, H5FD_MEM_NTYPES*sizeof(H5FD_mem_t));
    if (memb_fapl) {
	for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1)) {
	    if (fa->memb_fapl[mt]>=0)
		memb_fapl[mt] = H5Pcopy(fa->memb_fapl[mt]);
	    else
		memb_fapl[mt] = fa->memb_fapl[mt]; /*default or bad ID*/
	}
    }
    if(memb_name) {
	for(mt = H5FD_MEM_DEFAULT; mt < H5FD_MEM_NTYPES; mt = (H5FD_mem_t)(mt + 1)) {
	    if(fa->memb_name[mt])
		memb_name[mt] = my_strdup(fa->memb_name[mt]);
	    else
		memb_name[mt] = NULL;
	}
    }
    if (memb_addr)
	memcpy(memb_addr, fa->memb_addr, H5FD_MEM_NTYPES*sizeof(haddr_t));
    if (relax)
	*relax = fa->relax;

    return 0;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_sb_size
 *
 * Purpose:	Returns the size of the private information to be stored in
 *		the superblock.
 *
 * Return:	Success:	The super block driver data size.
 *
 *		Failure:	never fails
 *
 * Programmer:	Robb Matzke
 *              Monday, August 16, 1999
 *
 *-------------------------------------------------------------------------
 */
static hsize_t
H5FD_multi_sb_size(H5FD_t *_file)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    unsigned		nseen = 0;
    hsize_t		nbytes = 8; /*size of header*/

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* How many unique files? */
    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
	nseen++;
    } END_MEMBERS;

    /* Addresses and EOA markers */
    nbytes += nseen * 2 * 8;

    /* Name templates */
    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
        size_t n = strlen(file->fa.memb_name[mt])+1;
        nbytes += (n+7) & ~((size_t)0x0007);
    } END_MEMBERS;

    return nbytes;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_sb_encode
 *
 * Purpose:	Encode driver information for the superblock. The NAME
 *		argument is a nine-byte buffer which will be initialized with
 *		an eight-character name/version number and null termination.
 *
 *		The encoding is a six-byte member mapping followed two bytes
 *		which are unused. For each unique file in usage-type order
 *		encode all the starting addresses as unsigned 64-bit integers,
 *		then all the EOA values as unsigned 64-bit integers, then all
 *		the template names as null terminated strings which are
 *		multiples of 8 characters.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Monday, August 16, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_sb_encode(H5FD_t *_file, char *name/*out*/,
		     unsigned char *buf/*out*/)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    haddr_t		memb_eoa;
    unsigned char	*p;
    size_t		nseen;
    size_t		i;
    H5FD_mem_t		m;
    static const char *func="H5FD_multi_sb_encode";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Name and version number */
    strncpy(name, "NCSAmulti", (size_t)8);
    name[8] = '\0';

    assert(7==H5FD_MEM_NTYPES);

    for (m=H5FD_MEM_SUPER; m<H5FD_MEM_NTYPES; m=(H5FD_mem_t)(m+1)) {
        buf[m-1] = (unsigned char)file->fa.memb_map[m];
    }
    buf[6] = 0;
    buf[7] = 0;

    /*
     * Copy the starting addresses and EOA values into the buffer in order of
     * usage type but only for types which map to something unique.
     */

    /* Encode all starting addresses and EOA values */
    nseen = 0;
    p = buf+8;
    assert(sizeof(haddr_t)<=8);
    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
        memcpy(p, &(file->fa.memb_addr[mt]), sizeof(haddr_t));
        p += sizeof(haddr_t);
        memb_eoa = H5FDget_eoa(file->memb[mt], mt);
        memcpy(p, &memb_eoa, sizeof(haddr_t));
        p += sizeof(haddr_t);
        nseen++;
    } END_MEMBERS;
    if (H5Tconvert(H5T_NATIVE_HADDR, H5T_STD_U64LE, nseen*2, buf+8, NULL, H5P_DEFAULT)<0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_DATATYPE, H5E_CANTCONVERT, "can't convert superblock info", -1)

    /* Encode all name templates */
    p = buf + 8 + nseen*2*8;
    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
        size_t n = strlen(file->fa.memb_name[mt]) + 1;
        strncpy((char *)p, file->fa.memb_name[mt], n);
        p += n;
        for (i=n; i%8; i++)
            *p++ = '\0';
    } END_MEMBERS;

    return 0;
} /* end H5FD_multi_sb_encode() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_sb_decode
 *
 * Purpose:	Decodes the superblock information for this driver. The NAME
 *		argument is the eight-character (plus null termination) name
 *		stored in the file.
 *
 *		The FILE argument is updated according to the information in
 *		the superblock. This may mean that some member files are
 *		closed and others are opened.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Monday, August 16, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_sb_decode(H5FD_t *_file, const char *name, const unsigned char *buf)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    char		x[2*H5FD_MEM_NTYPES*8];
    H5FD_mem_t		map[H5FD_MEM_NTYPES];
    int			i;
    size_t		nseen=0;
    hbool_t		map_changed=FALSE;
    hbool_t		in_use[H5FD_MEM_NTYPES];
    const char		*memb_name[H5FD_MEM_NTYPES];
    haddr_t		memb_addr[H5FD_MEM_NTYPES];
    haddr_t		memb_eoa[H5FD_MEM_NTYPES];
    haddr_t		*ap;
    static const char *func="H5FD_multi_sb_decode";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Make sure the name/version number is correct */
    if (strcmp(name, "NCSAmult"))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_FILE, H5E_BADVALUE, "invalid multi superblock", -1)

    /* Set default values */
    ALL_MEMBERS(mt) {
        memb_addr[mt] = HADDR_UNDEF;
        memb_eoa[mt] = HADDR_UNDEF;
        memb_name[mt] = NULL;
    } END_MEMBERS;

    /*
     * Read the map and count the unique members.
     */
    memset(map, 0, sizeof map);

    for (i=0; i<6; i++) {
        map[i+1] = (H5FD_mem_t)buf[i];
        if (file->fa.memb_map[i+1]!=map[i+1])
            map_changed=TRUE;
    }

    UNIQUE_MEMBERS(map, mt) {
        nseen++;
    } END_MEMBERS;
    buf += 8;

    /* Decode Address and EOA values */
    assert(sizeof(haddr_t)<=8);
    memcpy(x, buf, (nseen*2*8));
    buf += nseen*2*8;
    if (H5Tconvert(H5T_STD_U64LE, H5T_NATIVE_HADDR, nseen*2, x, NULL, H5P_DEFAULT)<0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_DATATYPE, H5E_CANTCONVERT, "can't convert superblock info", -1)
    ap = (haddr_t*)((void *)x); /* Extra (void *) cast to quiet "cast to create alignment" warning - 2019/07/05, QAK */
    UNIQUE_MEMBERS(map, mt) {
        memb_addr[_unmapped] = *ap++;
        memb_eoa[_unmapped] = *ap++;
    } END_MEMBERS;

    /* Decode name templates */
    UNIQUE_MEMBERS(map, mt) {
        size_t n = strlen((const char *)buf)+1;
        memb_name[_unmapped] = (const char *)buf;
        buf += (n+7) & ~((unsigned)0x0007);
    } END_MEMBERS;

    /*
     * Use the mapping saved in the superblock in preference to the one
     * already set for the file. Since we may have opened files which are no
     * longer needed we should close all those files. We'll open the new
     * files at the end.
     */
    if (map_changed) {
        /* Commit map */
        ALL_MEMBERS(mt) {
            file->fa.memb_map[mt] = map[mt];
        } END_MEMBERS;

        /* Close files which are unused now */
        memset(in_use, 0, sizeof in_use);
        UNIQUE_MEMBERS(map, mt) {
            in_use[mt] = TRUE;
        } END_MEMBERS;
        ALL_MEMBERS(mt) {
            if (!in_use[mt] && file->memb[mt]) {
                (void)H5FDclose(file->memb[mt]);
                file->memb[mt] = NULL;
            }
            file->fa.memb_map[mt] = map[mt];
        } END_MEMBERS;
    }

    /* Commit member starting addresses and name templates */
    ALL_MEMBERS(mt) {
        file->fa.memb_addr[mt] = memb_addr[mt];
        if (memb_name[mt]) {
            if (file->fa.memb_name[mt])
                free(file->fa.memb_name[mt]);
            file->fa.memb_name[mt] = my_strdup(memb_name[mt]);
        }
    } END_MEMBERS;
    if (compute_next(file)<0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "compute_next() failed", -1)

    /* Open all necessary files */
    if (open_members(file)<0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "open_members() failed", -1)

    /* Set the EOA marker for all open files */
    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
        if (file->memb[mt])
            if(H5FDset_eoa(file->memb[mt], mt, memb_eoa[mt])<0)
                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_CANTSET, "set_eoa() failed", -1)

        /* Save the individual EOAs in one place for later comparison (in H5FD_multi_set_eoa) */
        file->memb_eoa[mt] = memb_eoa[mt];
    } END_MEMBERS;

    return 0;
} /* end H5FD_multi_sb_decode() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_fapl_get
 *
 * Purpose:	Returns a file access property list which indicates how the
 *		specified file is being accessed. The return list could be
 *		used to access another file the same way.
 *
 * Return:	Success:	Ptr to new file access property list with all
 *				members copied from the file struct.
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Friday, August 13, 1999
 *
 *-------------------------------------------------------------------------
 */
static void *
H5FD_multi_fapl_get(H5FD_t *_file)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    return H5FD_multi_fapl_copy(&(file->fa));
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_fapl_copy
 *
 * Purpose:	Copies the multi-specific file access properties.
 *
 * Return:	Success:	Ptr to a new property list
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static void *
H5FD_multi_fapl_copy(const void *_old_fa)
{
    const H5FD_multi_fapl_t *old_fa = (const H5FD_multi_fapl_t*)_old_fa;
    H5FD_multi_fapl_t *new_fa = (H5FD_multi_fapl_t *)calloc(1, sizeof(H5FD_multi_fapl_t));
    int nerrors = 0;
    static const char *func="H5FD_multi_fapl_copy";  /* Function Name for error reporting */

    assert(new_fa);

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    memcpy(new_fa, old_fa, sizeof(H5FD_multi_fapl_t));
    ALL_MEMBERS(mt) {
	if (old_fa->memb_fapl[mt]>=0) {
	    if (H5Iinc_ref(old_fa->memb_fapl[mt]) < 0) {
                nerrors++;
                break;
            }
	    new_fa->memb_fapl[mt] = old_fa->memb_fapl[mt];
	}
	if (old_fa->memb_name[mt]) {
	    new_fa->memb_name[mt] = my_strdup(old_fa->memb_name[mt]);
            if (NULL == new_fa->memb_name[mt]) {
                nerrors++;
                break;
            }
	}
    } END_MEMBERS;

    if (nerrors) {
        ALL_MEMBERS(mt) {
            if (new_fa->memb_fapl[mt]>=0)
                (void)H5Idec_ref(new_fa->memb_fapl[mt]);
            if (new_fa->memb_name[mt])
                free(new_fa->memb_name[mt]);
        } END_MEMBERS;
        free(new_fa);
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "can't release object on error", NULL)
    }
    return new_fa;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_fapl_free
 *
 * Purpose:	Frees the multi-specific file access properties.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_fapl_free(void *_fa)
{
    H5FD_multi_fapl_t	*fa = (H5FD_multi_fapl_t*)_fa;
    static const char *func="H5FD_multi_fapl_free";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    ALL_MEMBERS(mt) {
	if (fa->memb_fapl[mt]>=0)
            if(H5Idec_ref(fa->memb_fapl[mt])<0)
                H5Epush_ret(func, H5E_ERR_CLS, H5E_FILE, H5E_CANTCLOSEOBJ, "can't close property list", -1)
	if (fa->memb_name[mt])
            free(fa->memb_name[mt]);
    } END_MEMBERS;
    free(fa);

    return 0;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_open
 *
 * Purpose:	Creates and/or opens a multi HDF5 file.
 *
 * Return:	Success:	A pointer to a new file data structure. The
 *				public fields will be initialized by the
 *				caller, which is always H5FD_open().
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static H5FD_t *
H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
{
    H5FD_multi_t	*file=NULL;
    hid_t		close_fapl=-1;
    const H5FD_multi_fapl_t *fa;
    H5FD_mem_t		m;
    static const char *func="H5FD_multi_open";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Check arguments */
    if (!name || !*name)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_ARGS, H5E_BADVALUE, "invalid file name", NULL)
    if (0 == maxaddr || HADDR_UNDEF == maxaddr)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_ARGS, H5E_BADRANGE, "bogus maxaddr", NULL)

    /*
     * Initialize the file from the file access properties, using default
     * values if necessary.  Make sure to use CALLOC here because the code
     * in H5FD_multi_set_eoa depends on the proper initialization of memb_eoa
     * in H5FD_multi_t.
     */
    if(NULL == (file = (H5FD_multi_t *)calloc((size_t)1, sizeof(H5FD_multi_t))))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_RESOURCE, H5E_NOSPACE, "memory allocation failed", NULL)
    if(H5P_FILE_ACCESS_DEFAULT == fapl_id || H5FD_MULTI != H5Pget_driver(fapl_id)) {
        close_fapl = fapl_id = H5Pcreate(H5P_FILE_ACCESS);
        if(H5Pset_fapl_multi(fapl_id, NULL, NULL, NULL, NULL, TRUE) < 0)
            H5Epush_goto(func, H5E_ERR_CLS, H5E_FILE, H5E_CANTSET, "can't set property value", error)
    }
    fa = (const H5FD_multi_fapl_t *)H5Pget_driver_info(fapl_id);
    assert(fa);
    ALL_MEMBERS(mt) {
        file->fa.memb_map[mt] = fa->memb_map[mt];
        file->fa.memb_addr[mt] = fa->memb_addr[mt];
        if (fa->memb_fapl[mt] >= 0)
            H5Iinc_ref(fa->memb_fapl[mt]);
        file->fa.memb_fapl[mt] = fa->memb_fapl[mt];
        if (fa->memb_name[mt])
            file->fa.memb_name[mt] = my_strdup(fa->memb_name[mt]);
        else
            file->fa.memb_name[mt] = NULL;
    } END_MEMBERS;
    file->fa.relax = fa->relax;
    file->flags = flags;
    file->name = my_strdup(name);
    if (close_fapl >= 0)
        if(H5Pclose(close_fapl) < 0)
            H5Epush_goto(func, H5E_ERR_CLS, H5E_FILE, H5E_CANTCLOSEOBJ, "can't close property list", error)

    /* Compute derived properties and open member files */
    if (compute_next(file) < 0)
        H5Epush_goto(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "compute_next() failed", error);
    if (open_members(file) < 0)
        H5Epush_goto(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "open_members() failed", error);

    /* We must have opened at least the superblock file */
    if (H5FD_MEM_DEFAULT == (m = file->fa.memb_map[H5FD_MEM_SUPER]))
        m = H5FD_MEM_SUPER;
    if (NULL == file->memb[m])
        goto error;

    return (H5FD_t*)file;

error:
    /* Cleanup and fail */
    if (file) {
        ALL_MEMBERS(mt) {
            if (file->memb[mt]) (void)H5FDclose(file->memb[mt]);
            if (file->fa.memb_fapl[mt] >= 0) (void)H5Idec_ref(file->fa.memb_fapl[mt]);
            if (file->fa.memb_name[mt]) free(file->fa.memb_name[mt]);
        } END_MEMBERS;
        if (file->name)
            free(file->name);
        free(file);
    }
    return NULL;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_close
 *
 * Purpose:	Closes a multi file.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative with as many members closed as
 *				possible. The only subsequent operation
 *				permitted on the file is a close operation.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_close(H5FD_t *_file)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    int			nerrors=0;
    static const char *func="H5FD_multi_close";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Close as many members as possible */
    ALL_MEMBERS(mt) {
	if (file->memb[mt]) {
	    if (H5FDclose(file->memb[mt])<0) {
            nerrors++;
	    } else {
            file->memb[mt] = NULL;
	    }
	}
    } END_MEMBERS;
    if (nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error closing member files", -1)

    /* Clean up other stuff */
    ALL_MEMBERS(mt) {
	if (file->fa.memb_fapl[mt]>=0) (void)H5Idec_ref(file->fa.memb_fapl[mt]);
	if (file->fa.memb_name[mt]) free(file->fa.memb_name[mt]);
    } END_MEMBERS;

    free(file->name);
    free(file);
    return 0;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_cmp
 *
 * Purpose:	Compares two file families to see if they are the same. It
 *		does this by comparing the first common member of the two
 *		families.  If the families have no members in common then the
 *		file with the earliest member is smaller than the other file.
 *		We abort if neither file has any members.
 *
 * Return:	Success:	like strcmp()
 *
 *		Failure:	never fails (arguments were checked by the
 *				caller).
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static int
H5FD_multi_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
{
    const H5FD_multi_t	*f1 = (const H5FD_multi_t*)_f1;
    const H5FD_multi_t	*f2 = (const H5FD_multi_t*)_f2;
    H5FD_mem_t		out_mt = H5FD_MEM_DEFAULT;
    int			cmp=0;

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    ALL_MEMBERS(mt) {
        out_mt = mt;
	if(f1->memb[mt] && f2->memb[mt])
            break;
	if(!cmp) {
	    if(f1->memb[mt])
                cmp = -1;
	    else if(f2->memb[mt])
                cmp = 1;
	}
    } END_MEMBERS;
    assert(cmp || out_mt<H5FD_MEM_NTYPES);
    if(out_mt>=H5FD_MEM_NTYPES)
        return cmp;

    return H5FDcmp(f1->memb[out_mt], f2->memb[out_mt]);
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_query
 *
 * Purpose:	Set the flags that this VFL driver is capable of supporting.
 *              (listed in H5FDpublic.h)
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, September 26, 2000
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_query(const H5FD_t *_f, unsigned long *flags /* out */)
{
    /* Shut compiler up */
    _f=_f;

    /* Set the VFL feature flags that this driver supports */
    if(flags) {
        *flags = 0;
        *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes */
        *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations */
        *flags |= H5FD_FEAT_USE_ALLOC_SIZE;     /* OK just pass the allocation size to the alloc callback */
        *flags |= H5FD_FEAT_PAGED_AGGR;         /* OK special file space mapping for paged aggregation */
    } /* end if */

    return(0);
} /* end H5FD_multi_query() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_get_type_map
 *
 * Purpose:	Retrieve the memory type mapping for this file
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, October  9, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_get_type_map(const H5FD_t *_file, H5FD_mem_t *type_map)
{
    const H5FD_multi_t	*file = (const H5FD_multi_t*)_file;

    /* Copy file's free space type mapping */
    memcpy(type_map, file->fa.memb_map, sizeof(file->fa.memb_map));

    return(0);
} /* end H5FD_multi_get_type_map() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_get_eoa
 *
 * Purpose:	Returns the end-of-address marker for the file. The EOA
 *		marker is the first address past the last byte allocated in
 *		the format address space.
 *
 * Return:	Success:	The end-of-address-marker
 *
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *              Raymond Lu
 *              21 Dec. 2006
 *              Added the parameter TYPE.  It's only used for MULTI driver.
 *              If the TYPE is H5FD_MEM_DEFAULT, simply find the biggest
 *              EOA of individual file because the EOA for the whole file
 *              is meaningless.
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_multi_get_eoa(const H5FD_t *_file, H5FD_mem_t type)
{
    const H5FD_multi_t	*file = (const H5FD_multi_t*)_file;
    haddr_t eoa = 0;
    static const char *func="H5FD_multi_get_eoa";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* The library used to have EOA for the whole file.  But it's
     * taken out because it makes little sense for MULTI files.
     * However, the library sometimes queries it through H5F_get_eoa.
     * Here the code finds the biggest EOA for individual file if
     * the query is for TYPE == H5FD_MEM_DEFAULT.
     */
    if(H5FD_MEM_DEFAULT == type) {
        UNIQUE_MEMBERS(file->fa.memb_map, mt) {
            haddr_t memb_eoa;

	    if (file->memb[mt]) {
                /* Retrieve EOA */
	        H5E_BEGIN_TRY {
                    memb_eoa = H5FDget_eoa(file->memb[mt], mt);
	        } H5E_END_TRY;

	        if(HADDR_UNDEF == memb_eoa)
                    H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eoa", HADDR_UNDEF)
                if(memb_eoa>0)
                    memb_eoa += file->fa.memb_addr[mt];
	    } else if(file->fa.relax) {
	        /*
	         * The member is not open yet (maybe it doesn't exist). Make the
	         * best guess about the end-of-file.
	         */
	        memb_eoa = file->memb_next[mt];
	        assert(HADDR_UNDEF != memb_eoa);
	    } else {
                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eoa", HADDR_UNDEF)
	    }

            if(memb_eoa > eoa)
                eoa = memb_eoa;
        } END_MEMBERS;
    } else {
        H5FD_mem_t mmt = file->fa.memb_map[type];

        if(H5FD_MEM_DEFAULT == mmt)
            mmt = type;

	if(file->memb[mmt]) {
            H5E_BEGIN_TRY {
	        eoa = H5FDget_eoa(file->memb[mmt], mmt);
            } H5E_END_TRY;

	    if(HADDR_UNDEF == eoa)
                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eoa", HADDR_UNDEF)
	    if(eoa > 0)
                eoa += file->fa.memb_addr[mmt];
	} else if(file->fa.relax) {
	    /*
	     * The member is not open yet (maybe it doesn't exist). Make the
	     * best guess about the end-of-file.
	     */
	    eoa = file->memb_next[mmt];
	    assert(HADDR_UNDEF != eoa);
	 } else {
            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eoa", HADDR_UNDEF)
	 }
    }

    return eoa;
} /* end H5FD_multi_get_eoa() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_set_eoa
 *
 * Purpose:	Set the end-of-address marker for the file by savig the new
 *		EOA value in the file struct. Also set the EOA marker for the
 *		subfile in which the new EOA value falls. We don't set the
 *		EOA values of any other subfiles.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *              Raymond Lu
 *              10 January 2007
 *              EOA for the whole file is discarded because it's meaningless
 *              for MULTI file.  This function only sets eoa for individual
 *              file.
 *
 *              Raymond Lu
 *              21 June 2011
 *              Backward compatibility of EOA.  Please the comment in the
 *              code.
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mmt;
    herr_t		status;
    static const char *func="H5FD_multi_set_eoa";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    mmt = file->fa.memb_map[type];
    if(H5FD_MEM_DEFAULT == mmt) {
        if(H5FD_MEM_DEFAULT == type)
            mmt = H5FD_MEM_SUPER;
        else
            mmt = type;
    } /* end if */

    /* Handle backward compatibility in a quick and simple way.  v1.6 library
     * had EOA for the entire virtual file.  But it wasn't meaningful.  So v1.8
     * library doesn't have it anymore.  It saves the EOA for the metadata file,
     * instead.  Here we try to figure out whether the EOA is from a v1.6 file
     * by comparing its value.  If it is a big value, we assume it's from v1.6
     * and simply discard it. This is the normal case when the metadata file
     * has the smallest starting address.  If the metadata file has the biggest
     * address, the EOAs of v1.6 and v1.8 files are the same.  It won't cause
     * any trouble.  (Please see Issue 2598 in Jira) SLU - 2011/6/21
     */
    if(H5FD_MEM_SUPER == mmt && file->memb_eoa[H5FD_MEM_SUPER] > 0 && eoa > (file->memb_next[H5FD_MEM_SUPER] / 2))
        return 0;

    assert(eoa >= file->fa.memb_addr[mmt]);
    assert(eoa < file->memb_next[mmt]);

    H5E_BEGIN_TRY {
	status = H5FDset_eoa(file->memb[mmt], mmt, (eoa - file->fa.memb_addr[mmt]));
    } H5E_END_TRY;
    if(status < 0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_FILE, H5E_BADVALUE, "member H5FDset_eoa failed", -1)

    return 0;
} /* end H5FD_multi_set_eoa() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_get_eof
 *
 * Purpose:	Returns the end-of-file marker, which is the greater of
 *		either the total multi size or the current EOA marker.
 *
 * Return:	Success:	End of file address, the first address past
 *				the end of the multi of files or the current
 *				EOA, whichever is larger.
 *
 *		Failure:      	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_multi_get_eof(const H5FD_t *_file, H5FD_mem_t type)
{
    const H5FD_multi_t	*file = (const H5FD_multi_t*)_file;
    haddr_t		eof = 0;
    static const char *func="H5FD_multi_get_eof";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    if(H5FD_MEM_DEFAULT == type) {
        UNIQUE_MEMBERS(file->fa.memb_map, mt) {
            haddr_t tmp_eof;

            if(file->memb[mt]) {
                /* Retrieve EOF */
                H5E_BEGIN_TRY {
                    tmp_eof = H5FDget_eof(file->memb[mt], type);
                } H5E_END_TRY;

                if(HADDR_UNDEF == tmp_eof)
                    H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eof", HADDR_UNDEF)
                if(tmp_eof > 0)
                    tmp_eof += file->fa.memb_addr[mt];
            } else if(file->fa.relax) {
                /*
                 * The member is not open yet (maybe it doesn't exist). Make the
                 * best guess about the end-of-file.
                 */
                tmp_eof = file->memb_next[mt];
                assert(HADDR_UNDEF != tmp_eof);
            } else {
                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eof", HADDR_UNDEF)
            }
            if(tmp_eof > eof)
                eof = tmp_eof;
        } END_MEMBERS;
    } else {
        H5FD_mem_t mmt = file->fa.memb_map[type];

        if(H5FD_MEM_DEFAULT == mmt)
            mmt = type;

	if(file->memb[mmt]) {
            /* Retrieve EOF */
            H5E_BEGIN_TRY {
	        eof = H5FDget_eof(file->memb[mmt], mmt);
            } H5E_END_TRY;

	    if(HADDR_UNDEF == eof)
                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eof", HADDR_UNDEF)
	    if(eof > 0)
                eof += file->fa.memb_addr[mmt];
	} else if(file->fa.relax) {
	    /*
	     * The member is not open yet (maybe it doesn't exist). Make the
	     * best guess about the end-of-file.
	     */
	    eof = file->memb_next[mmt];
	    assert(HADDR_UNDEF != eof);
	 } else {
            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eof", HADDR_UNDEF)
	 }
    }
    return eof;
}


/*-------------------------------------------------------------------------
 * Function:       H5FD_multi_get_handle
 *
 * Purpose:        Returns the file handle of MULTI file driver.
 *
 * Returns:        Non-negative if succeed or negative if fails.
 *
 * Programmer:     Raymond Lu
 *                 Sept. 16, 2002
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle)
{
    H5FD_multi_t        *file = (H5FD_multi_t *)_file;
    H5FD_mem_t          type, mmt;
    static const char   *func="H5FD_multi_get_handle";  /* Function Name for error reporting */

    /* Get data type for multi driver */
    if(H5Pget_multi_type(fapl, &type) < 0)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "can't get data type for multi driver", -1)
    if(type<H5FD_MEM_DEFAULT || type>=H5FD_MEM_NTYPES)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "data type is out of range", -1)
    mmt = file->fa.memb_map[type];
    if(H5FD_MEM_DEFAULT==mmt) mmt = type;

    return (H5FDget_vfd_handle(file->memb[mmt], fapl, file_handle));
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_alloc
 *
 * Purpose:	Allocate file memory.
 *
 * Return:	Success:	Address of new memory
 *
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Thursday, August 12, 1999
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_multi_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mmt;
    haddr_t		addr;
    static const char *func="H5FD_multi_alloc";  /* Function Name for error reporting */

    mmt = file->fa.memb_map[type];
    if (H5FD_MEM_DEFAULT==mmt) mmt = type;

    /* XXX: NEED to work on this again */
    if(file->pub.paged_aggr) {
        ALL_MEMBERS(mt) {
            if(file->memb[mt])
                file->memb[mt]->paged_aggr = file->pub.paged_aggr;
        } END_MEMBERS;
    }

    if (HADDR_UNDEF==(addr=H5FDalloc(file->memb[mmt], mmt, dxpl_id, size)))
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file can't alloc", HADDR_UNDEF)
    addr += file->fa.memb_addr[mmt];

/*#ifdef TMP
    if ( addr + size > file->eoa ) {

	if ( H5FD_multi_set_eoa(_file, addr + size) < 0 ) {

            H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, \
			"can't set eoa", HADDR_UNDEF)
	}
    }
#else
    if ( addr + size > file->eoa )
	file->eoa = addr + size;
#endif */

    return addr;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_free
 *
 * Purpose:	Frees memory
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Thursday, August 12, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_free(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mmt;

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    mmt = file->fa.memb_map[type];
    if (H5FD_MEM_DEFAULT==mmt) mmt = type;

    assert(addr>=file->fa.memb_addr[mmt]);
    assert(addr+size<=file->memb_next[mmt]);
    return H5FDfree(file->memb[mmt], mmt, dxpl_id, addr-file->fa.memb_addr[mmt], size);
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_read
 *
 * Purpose:	Reads SIZE bytes of data from FILE beginning at address ADDR
 *		into buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero. Result is stored in caller-supplied
 *				buffer BUF.
 *
 *		Failure:	-1, contents of buffer BUF are undefined.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
    size_t size, void *_buf/*out*/)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mt, mmt, hi = H5FD_MEM_DEFAULT;
    haddr_t		start_addr = 0;

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Find the file to which this address belongs */
    for(mt = H5FD_MEM_SUPER; mt < H5FD_MEM_NTYPES; mt = (H5FD_mem_t)(mt + 1)) {
	mmt = file->fa.memb_map[mt];
	if(H5FD_MEM_DEFAULT == mmt)
            mmt = mt;
	assert(mmt > 0 && mmt < H5FD_MEM_NTYPES);

	if(file->fa.memb_addr[mmt] > addr)
            continue;
	if(file->fa.memb_addr[mmt] >= start_addr) {
	    start_addr = file->fa.memb_addr[mmt];
	    hi = mmt;
	} /* end if */
    } /* end for */
    assert(hi > 0);

    /* Read from that member */
    return H5FDread(file->memb[hi], type, dxpl_id, addr - start_addr, size, _buf);
} /* end H5FD_multi_read() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_write
 *
 * Purpose:	Writes SIZE bytes of data to FILE beginning at address ADDR
 *		from buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
    size_t size, const void *_buf)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mt, mmt, hi = H5FD_MEM_DEFAULT;
    haddr_t		start_addr = 0;

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Find the file to which this address belongs */
    for(mt = H5FD_MEM_SUPER; mt < H5FD_MEM_NTYPES; mt = (H5FD_mem_t)(mt + 1)) {
	mmt = file->fa.memb_map[mt];
	if(H5FD_MEM_DEFAULT == mmt)
            mmt = mt;
	assert(mmt > 0 && mmt<H5FD_MEM_NTYPES);

	if(file->fa.memb_addr[mmt] > addr)
            continue;
	if(file->fa.memb_addr[mmt] >= start_addr) {
	    start_addr = file->fa.memb_addr[mmt];
	    hi = mmt;
	} /* end if */
    } /* end for */
    assert(hi > 0);

    /* Write to that member */
    return H5FDwrite(file->memb[hi], type, dxpl_id, addr - start_addr, size, _buf);
} /* end H5FD_multi_write() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_flush
 *
 * Purpose:	Flushes all multi members.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1, as many files flushed as possible.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mt;
    int			nerrors=0;
    static const char *func="H5FD_multi_flush";  /* Function Name for error reporting */

#if 0
    H5FD_mem_t		mmt;

    /* Debugging stuff... */
    fprintf(stderr, "multifile access information:\n");

    /* print the map */
    fprintf(stderr, "    map=");
    for (mt=1; mt<H5FD_MEM_NTYPES; mt++) {
	mmt = file->memb_map[mt];
	if (H5FD_MEM_DEFAULT==mmt) mmt = mt;
	fprintf(stderr, "%s%d", 1==mt?"":",", (int)mmt);
    }
    fprintf(stderr, "\n");

    /* print info about each file */
    fprintf(stderr, "      File             Starting            Allocated                 Next Member\n");
    fprintf(stderr, "    Number              Address                 Size              Address Name\n");
    fprintf(stderr, "    ------ -------------------- -------------------- -------------------- ------------------------------\n");

    for (mt=1; mt<H5FD_MEM_NTYPES; mt++) {
	if (HADDR_UNDEF!=file->memb_addr[mt]) {
	    haddr_t eoa = H5FDget_eoa(file->memb[mt], mt);
	    fprintf(stderr, "    %6d %20llu %20llu %20llu %s\n",
		    (int)mt, (unsigned long long)(file->memb_addr[mt]),
		    (unsigned long long)eoa,
		    (unsigned long long)(file->memb_next[mt]),
		    file->memb_name[mt]);
	}
    }
#endif

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Flush each file */
    for (mt=H5FD_MEM_SUPER; mt<H5FD_MEM_NTYPES; mt=(H5FD_mem_t)(mt+1)) {
	if (file->memb[mt]) {
	    H5E_BEGIN_TRY {
		if (H5FDflush(file->memb[mt],dxpl_id,closing)<0) nerrors++;
	    } H5E_END_TRY;
	}
    }
    if (nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error flushing member files", -1)

    return 0;
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_truncate
 *
 * Purpose:	Truncates all multi members.
 *
 * Return:	Success:	0
 *		Failure:	-1, as many files truncated as possible.
 *
 * Programmer:	Quincey Koziol
 *              Thursday, January 31, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    H5FD_mem_t		mt;
    int			nerrors=0;
    static const char *func="H5FD_multi_truncate";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Truncate each file */
    for(mt = H5FD_MEM_SUPER; mt < H5FD_MEM_NTYPES; mt = (H5FD_mem_t)(mt + 1)) {
	if(file->memb[mt]) {
	    H5E_BEGIN_TRY {
		if(H5FDtruncate(file->memb[mt], dxpl_id, closing) < 0)
                    nerrors++;
	    } H5E_END_TRY;
	}
    }
    if(nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error truncating member files", -1)

    return 0;
} /* end H5FD_multi_truncate() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_lock
 *
 * Purpose:	Place a lock on all multi members.
 *		When there is error in locking a member file, it will not
 *		proceed further and will try to remove the locks  of those
 *		member files that are locked before error is encountered.
 *
 * Return:	Success:	0
 *		Failure:	-1
 *
 * Programmer:	Vailin Choi; March 2015
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_lock(H5FD_t *_file, hbool_t rw)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    int			nerrors = 0;
    H5FD_mem_t 		out_mt;
    static const char *func="H5FD_multi_unlock";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    /* Lock all member files */
    ALL_MEMBERS(mt) {
        out_mt = mt;
        if(file->memb[mt]) {
            H5E_BEGIN_TRY {
                if(H5FDlock(file->memb[mt], rw) < 0) {
                    nerrors++;
                    break;
                } /* end if */
            } H5E_END_TRY;
        } /* end if */
    } END_MEMBERS;

    /* Try to unlock the member files that are locked before error is encountered */
    if(nerrors) {
        H5FD_mem_t k;

        for(k = H5FD_MEM_DEFAULT; k < out_mt; k = (H5FD_mem_t)(k + 1)) {
            H5E_BEGIN_TRY {
                if(H5FDunlock(file->memb[k]) < 0)
                    nerrors++;
            } H5E_END_TRY;
        } /* end for */
    } /* end if */

    if(nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error locking member files", -1)
    return 0;

} /* H5FD_multi_lock() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_multi_unlock
 *
 * Purpose:	Remove the lock on all multi members.
 *		It will try to unlock all member files but will record error
 *		encountered.
 *
 * Return:	Success:	0
 *		Failure:	-1
 *
 * Programmer:	Vailin Choi; March 2015
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_multi_unlock(H5FD_t *_file)
{
    H5FD_multi_t	*file = (H5FD_multi_t*)_file;
    int			nerrors=0;
    static const char *func="H5FD_multi_unlock";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    ALL_MEMBERS(mt) {
        if(file->memb[mt])
            if(H5FDunlock(file->memb[mt]) < 0)
		nerrors++;
    } END_MEMBERS;

    if(nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error unlocking member files", -1)

    return 0;
} /* H5FD_multi_unlock() */


/*-------------------------------------------------------------------------
 * Function:	compute_next
 *
 * Purpose:	Compute the memb_next[] values of the file based on the
 *		file's member map and the member starting addresses.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Monday, August 23, 1999
 *
 *-------------------------------------------------------------------------
 */
static int
compute_next(H5FD_multi_t *file)
{
    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    ALL_MEMBERS(mt) {
	file->memb_next[mt] = HADDR_UNDEF;
    } END_MEMBERS;

    UNIQUE_MEMBERS(file->fa.memb_map, mt1) {
	UNIQUE_MEMBERS2(file->fa.memb_map, mt2) {
	    if (file->fa.memb_addr[mt1]<file->fa.memb_addr[mt2] &&
		(HADDR_UNDEF==file->memb_next[mt1] ||
		 file->memb_next[mt1]>file->fa.memb_addr[mt2])) {
		file->memb_next[mt1] = file->fa.memb_addr[mt2];
	    }
	} END_MEMBERS;
	if (HADDR_UNDEF==file->memb_next[mt1]) {
	    file->memb_next[mt1] = HADDR_MAX; /*last member*/
	}
    } END_MEMBERS;

    return 0;
}


/*-------------------------------------------------------------------------
 * Function:	open_members
 *
 * Purpose:	Opens all members which are not opened yet.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Monday, August 23, 1999
 *
 *-------------------------------------------------------------------------
 */
/* Disable warning for "format not a string literal" here -QAK */
/*
 *      This pragma only needs to surround the snprintf() call with
 *      tmp in the code below, but early (4.4.7, at least) gcc only
 *      allows diagnostic pragmas to be toggled outside of functions.
 */
H5_GCC_DIAG_OFF(format-nonliteral)
static int
open_members(H5FD_multi_t *file)
{
    char    tmp[H5FD_MULT_MAX_FILE_NAME_LEN];
    int     nerrors = 0;
    static const char *func="(H5FD_multi)open_members";  /* Function Name for error reporting */

    /* Clear the error stack */
    H5Eclear2(H5E_DEFAULT);

    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
        if(file->memb[mt])
            continue; /*already open*/
        assert(file->fa.memb_name[mt]);
        /* Note: This truncates the user's filename down to only sizeof(tmp)
         *      characters. -QK & JK, 2013/01/17
         */
        sprintf(tmp, file->fa.memb_name[mt], file->name);
        tmp[sizeof(tmp) - 1] = '\0';

        H5E_BEGIN_TRY {
            file->memb[mt] = H5FDopen(tmp, file->flags, file->fa.memb_fapl[mt], HADDR_UNDEF);
        } H5E_END_TRY;
        if(!file->memb[mt]) {
            if(!file->fa.relax || (file->flags & H5F_ACC_RDWR))
            nerrors++;
        }
    } END_MEMBERS;
    if (nerrors)
        H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "error opening member files", -1)

    return 0;
}
H5_GCC_DIAG_ON(format-nonliteral)


#ifdef _H5private_H
/*
 * This is not related to the functionality of the driver code.
 * It is added here to trigger warning if HDF5 private definitions are included
 * by mistake.  The code should use only HDF5 public API and definitions.
 */
#error "Do not use HDF5 private definitions"
#endif