/*
* Copyright (C) 1997-2001 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Monday, November 10, 1997
*
* Purpose: Implements a family of files that acts as a single hdf5
* file. The purpose is to be able to split a huge file on a
* 64-bit platform, transfer all the <2GB members to a 32-bit
* platform, and then access the entire huge file on the 32-bit
* platform.
*
* All family members are logically the same size although their
* physical sizes may vary. The logical member size is
* determined by looking at the physical size of the first member
* when the file is opened. When creating a file family, the
* first member is created with a predefined physical size
* (actually, this happens when the file family is flushed, and
* can be quite time consuming on file systems that don't
* implement holes, like nfs).
*
*/
#include "H5private.h" /*library functions */
#include "H5Eprivate.h" /*error handling */
#include "H5Fprivate.h" /*files */
#include "H5FDprivate.h" /*file driver */
#include "H5FDfamily.h" /* Family file driver */
#include "H5MMprivate.h" /* Memory allocation */
#include "H5Pprivate.h" /*property lists */
#undef MAX
#define MAX(X,Y) ((X)>(Y)?(X):(Y))
#undef MIN
#define MIN(X,Y) ((X)<(Y)?(X):(Y))
/* The driver identification number, initialized at runtime */
static hid_t H5FD_FAMILY_g = 0;
/* The description of a file belonging to this driver. */
typedef struct H5FD_family_t {
H5FD_t pub; /*public stuff, must be first */
hid_t memb_fapl_id; /*file access property list for members */
hsize_t memb_size; /*maximum size of each member file */
int nmembs; /*number of family members */
int amembs; /*number of member slots allocated */
H5FD_t **memb; /*dynamic array of member pointers */
haddr_t eoa; /*end of allocated addresses */
char *name; /*name generator printf format */
unsigned flags; /*flags for opening additional members */
} H5FD_family_t;
/* Driver-specific file access properties */
typedef struct H5FD_family_fapl_t {
hsize_t memb_size; /*size of each member */
hid_t memb_fapl_id; /*file access property list of each memb*/
} H5FD_family_fapl_t;
/* Driver specific data transfer properties */
typedef struct H5FD_family_dxpl_t {
hid_t memb_dxpl_id; /*data xfer property list of each memb */
} H5FD_family_dxpl_t;
/* Callback prototypes */
static void *H5FD_family_fapl_get(H5FD_t *_file);
static void *H5FD_family_fapl_copy(const void *_old_fa);
static herr_t H5FD_family_fapl_free(void *_fa);
static void *H5FD_family_dxpl_copy(const void *_old_dx);
static herr_t H5FD_family_dxpl_free(void *_dx);
static H5FD_t *H5FD_family_open(const char *name, unsigned flags,
hid_t fapl_id, haddr_t maxaddr);
static herr_t H5FD_family_close(H5FD_t *_file);
static int H5FD_family_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
static herr_t H5FD_family_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_family_get_eoa(H5FD_t *_file);
static herr_t H5FD_family_set_eoa(H5FD_t *_file, haddr_t eoa);
static haddr_t H5FD_family_get_eof(H5FD_t *_file);
static herr_t H5FD_family_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_family_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_family_flush(H5FD_t *_file);
/* The class struct */
static const H5FD_class_t H5FD_family_g = {
"family", /*name */
HADDR_MAX, /*maxaddr */
NULL, /*sb_size */
NULL, /*sb_encode */
NULL, /*sb_decode */
sizeof(H5FD_family_fapl_t), /*fapl_size */
H5FD_family_fapl_get, /*fapl_get */
H5FD_family_fapl_copy, /*fapl_copy */
H5FD_family_fapl_free, /*fapl_free */
sizeof(H5FD_family_dxpl_t), /*dxpl_size */
H5FD_family_dxpl_copy, /*dxpl_copy */
H5FD_family_dxpl_free, /*dxpl_free */
H5FD_family_open, /*open */
H5FD_family_close, /*close */
H5FD_family_cmp, /*cmp */
H5FD_family_query, /*query */
NULL, /*alloc */
NULL, /*free */
H5FD_family_get_eoa, /*get_eoa */
H5FD_family_set_eoa, /*set_eoa */
H5FD_family_get_eof, /*get_eof */
H5FD_family_read, /*read */
H5FD_family_write, /*write */
H5FD_family_flush, /*flush */
H5FD_FLMAP_SINGLE, /*fl_map */
};
/* Interface initialization */
#define PABLO_MASK H5FD_family_mask
#define INTERFACE_INIT H5FD_family_init
static intn interface_initialize_g = 0;
/*-------------------------------------------------------------------------
* Function: H5FD_family_init
*
* Purpose: Initialize this driver by registering the driver with the
* library.
*
* Return: Success: The driver ID for the family driver.
*
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
hid_t
H5FD_family_init(void)
{
FUNC_ENTER(H5FD_family_init, FAIL);
if (H5I_VFL!=H5Iget_type(H5FD_FAMILY_g))
H5FD_FAMILY_g = H5FDregister(&H5FD_family_g);
FUNC_LEAVE(H5FD_FAMILY_g);
}
/*-------------------------------------------------------------------------
* Function: H5Pset_fapl_family
*
* Purpose: Sets the file access property list FAPL_ID to use the family
* driver. The MEMB_SIZE is the size in bytes of each file
* member (used only when creating a new file) and the
* MEMB_FAPL_ID is a file access property list to be used for
* each family member.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_fapl_family(hid_t fapl_id, hsize_t memb_size, hid_t memb_fapl_id)
{
herr_t ret_value=FAIL;
H5FD_family_fapl_t fa;
FUNC_ENTER(H5Pset_fapl_family, FAIL);
H5TRACE3("e","ihi",fapl_id,memb_size,memb_fapl_id);
/* Check arguments */
if (H5P_FILE_ACCESS!=H5Pget_class(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a fapl");
if (H5P_DEFAULT!=memb_fapl_id &&
H5P_FILE_ACCESS!=H5Pget_class(memb_fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a fapl");
/*
* Initialize driver specific information. No need to copy it into the FA
* struct since all members will be copied by H5Pset_driver().
*/
fa.memb_size = memb_size;
fa.memb_fapl_id = memb_fapl_id;
ret_value= H5Pset_driver(fapl_id, H5FD_FAMILY, &fa);
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5Pget_fapl_family
*
* Purpose: Returns information about the family file access property
* list though the function arguments.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_fapl_family(hid_t fapl_id, hsize_t *memb_size/*out*/,
hid_t *memb_fapl_id/*out*/)
{
H5FD_family_fapl_t *fa;
FUNC_ENTER(H5Pget_fapl_family, FAIL);
H5TRACE3("e","ixx",fapl_id,memb_size,memb_fapl_id);
if (H5P_FILE_ACCESS!=H5Pget_class(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a fapl");
if (H5FD_FAMILY!=H5P_get_driver(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver");
if (NULL==(fa=H5Pget_driver_info(fapl_id)))
HRETURN_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info");
if (memb_size) *memb_size = fa->memb_size;
if (memb_fapl_id) *memb_fapl_id = H5Pcopy(fa->memb_fapl_id);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_fapl_get
*
* Purpose: Gets a file access property list which could be used to
* create an identical file.
*
* Return: Success: Ptr to new file access property list.
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Friday, August 13, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void *
H5FD_family_fapl_get(H5FD_t *_file)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
H5FD_family_fapl_t *fa = NULL;
FUNC_ENTER(H5FD_family_fapl_get, NULL);
if (NULL==(fa=H5MM_calloc(sizeof(H5FD_family_fapl_t))))
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
"memory allocation failed");
fa->memb_size = file->memb_size;
fa->memb_fapl_id = H5Pcopy(file->memb_fapl_id);
FUNC_LEAVE(fa);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_fapl_copy
*
* Purpose: Copies the family-specific file access properties.
*
* Return: Success: Ptr to a new property list
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void *
H5FD_family_fapl_copy(const void *_old_fa)
{
const H5FD_family_fapl_t *old_fa = (const H5FD_family_fapl_t*)_old_fa;
H5FD_family_fapl_t *new_fa = NULL;
FUNC_ENTER(H5FD_family_fapl_copy, NULL);
if (NULL==(new_fa=H5MM_malloc(sizeof(H5FD_family_fapl_t))))
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
"memory allocation failed");
memcpy(new_fa, old_fa, sizeof(H5FD_family_fapl_t));
new_fa->memb_fapl_id = H5Pcopy(old_fa->memb_fapl_id);
FUNC_LEAVE(new_fa);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_fapl_free
*
* Purpose: Frees the family-specific file access properties.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_fapl_free(void *_fa)
{
H5FD_family_fapl_t *fa = (H5FD_family_fapl_t*)_fa;
FUNC_ENTER(H5FD_family_fapl_free, FAIL);
H5Pclose(fa->memb_fapl_id);
H5MM_xfree(fa);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_dxpl_copy
*
* Purpose: Copes the family-specific data transfer properties.
*
* Return: Success: Ptr to new property list
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void *
H5FD_family_dxpl_copy(const void *_old_dx)
{
const H5FD_family_dxpl_t *old_dx = (const H5FD_family_dxpl_t*)_old_dx;
H5FD_family_dxpl_t *new_dx = NULL;
FUNC_ENTER(H5FD_family_dxpl_copy, NULL);
if (NULL==(new_dx=H5MM_malloc(sizeof(H5FD_family_dxpl_t))))
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
"memory allocation failed");
memcpy(new_dx, old_dx, sizeof(H5FD_family_dxpl_t));
new_dx->memb_dxpl_id = H5Pcopy(old_dx->memb_dxpl_id);
FUNC_LEAVE(new_dx);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_dxpl_free
*
* Purpose: Frees the family-specific data transfer properties.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_dxpl_free(void *_dx)
{
H5FD_family_dxpl_t *dx = (H5FD_family_dxpl_t*)_dx;
FUNC_ENTER(H5FD_family_dxpl_free, FAIL);
H5Pclose(dx->memb_dxpl_id);
H5MM_xfree(dx);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_open
*
* Purpose: Creates and/or opens a family of files as an HDF5 file.
*
* Return: Success: A pointer to a new file dat structure. The
* public fields will be initialized by the
* caller, which is always H5FD_open().
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static H5FD_t *
H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr)
{
H5FD_family_t *file=NULL;
H5FD_t *ret_value=NULL;
char memb_name[4096], temp[4096];
hsize_t eof;
unsigned t_flags = flags & ~H5F_ACC_CREAT;
FUNC_ENTER(H5FD_family_open, NULL);
/* Check arguments */
if (!name || !*name)
HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name");
if (0==maxaddr || HADDR_UNDEF==maxaddr)
HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr");
/* Initialize file from file access properties */
if (NULL==(file=H5MM_calloc(sizeof(H5FD_family_t))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
"unable to allocate file struct");
if (H5P_DEFAULT==fapl_id) {
file->memb_fapl_id = H5P_DEFAULT;
file->memb_size = 1024*1024*1024; /*1GB*/
} else {
H5FD_family_fapl_t *fa = H5Pget_driver_info(fapl_id);
file->memb_fapl_id = H5Pcopy(fa->memb_fapl_id);
file->memb_size = fa->memb_size;
}
file->name = H5MM_strdup(name);
file->flags = flags;
/* Check that names are unique */
sprintf(memb_name, name, 0);
sprintf(temp, name, 1);
if (!strcmp(memb_name, temp))
HGOTO_ERROR(H5E_FILE, H5E_FILEEXISTS, NULL, "file names not unique");
/* Open all the family members */
while (1) {
sprintf(memb_name, name, file->nmembs);
/* Enlarge member array */
if (file->nmembs>=file->amembs) {
int n = MAX(64, 2*file->amembs);
H5FD_t **x = H5MM_realloc(file->memb, n*sizeof(H5FD_t*));
if (!x)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
"unable to reallocate members");
file->amembs = n;
file->memb = x;
}
/*
* Attempt to open file. If the first file cannot be opened then fail;
* otherwise an open failure means that we've reached the last member.
* Allow H5F_ACC_CREAT only on the first family member.
*/
H5E_BEGIN_TRY {
file->memb[file->nmembs] = H5FDopen(memb_name,
0==file->nmembs?flags:t_flags,
file->memb_fapl_id,
HADDR_UNDEF);
} H5E_END_TRY;
if (!file->memb[file->nmembs]) {
if (0==file->nmembs)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL,
"unable to open member file");
H5Eclear();
break;
}
file->nmembs++;
}
/*
* The size of the first member determines the size of all the members,
* but if the size of the first member is zero then use the member size
* from the file access property list.
*/
if ((eof=H5FDget_eof(file->memb[0]))) file->memb_size = eof;
ret_value=(H5FD_t *)file;
done:
/* Cleanup and fail */
if (ret_value==NULL && file!=NULL) {
int i;
for (i=0; i<file->nmembs; i++)
if (file->memb[i])
H5FDclose(file->memb[i]);
if (file->memb)
H5MM_xfree(file->memb);
H5Pclose(file->memb_fapl_id);
if (file->name)
H5MM_xfree(file->name);
H5MM_xfree(file);
}
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_close
*
* Purpose: Closes a family of files.
*
* 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
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_close(H5FD_t *_file)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
int i, nerrors=0;
FUNC_ENTER(H5FD_family_close, FAIL);
/* Close as many members as possible */
for (i=0; i<file->nmembs; i++) {
if (file->memb[i]) {
if (H5FDclose(file->memb[i])<0) {
nerrors++;
} else {
file->memb[i] = NULL;
}
}
}
if (nerrors)
HRETURN_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL,
"unable to close member files");
/* Clean up other stuff */
H5Pclose(file->memb_fapl_id);
if (file->memb)
H5MM_xfree(file->memb);
if (file->name)
H5MM_xfree(file->name);
H5MM_xfree(file);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_cmp
*
* Purpose: Compares two file families to see if they are the same. It
* does this by comparing the first member of the two families.
*
* Return: Success: like strcmp()
*
* Failure: never fails (arguments were checked by the
* caller).
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5FD_family_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
{
const H5FD_family_t *f1 = (const H5FD_family_t*)_f1;
const H5FD_family_t *f2 = (const H5FD_family_t*)_f2;
int ret_value=(H5FD_VFD_DEFAULT);
FUNC_ENTER(H5FD_family_cmp, H5FD_VFD_DEFAULT);
assert(f1->nmembs>=1 && f1->memb[0]);
assert(f2->nmembs>=1 && f2->memb[0]);
ret_value= H5FDcmp(f1->memb[0], f2->memb[0]);
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_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
* Friday, August 25, 2000
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_query(const H5FD_t UNUSED *_f, unsigned long *flags /* out */)
{
herr_t ret_value=SUCCEED;
FUNC_ENTER(H5FD_family_query, FAIL);
/* Set the VFL feature flags that this driver supports */
if(flags) {
*flags=0;
*flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
*flags|=H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */
*flags|=H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */
}
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_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:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_family_get_eoa(H5FD_t *_file)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
FUNC_ENTER(H5FD_family_get_eoa, HADDR_UNDEF);
FUNC_LEAVE(file->eoa);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_set_eoa
*
* Purpose: Set the end-of-address marker for the file.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_set_eoa(H5FD_t *_file, haddr_t eoa)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
haddr_t addr=eoa;
int i;
char memb_name[4096];
FUNC_ENTER(H5FD_family_set_eoa, FAIL);
for (i=0; addr || i<file->nmembs; i++) {
/* Enlarge member array */
if (i>=file->amembs) {
int n = MAX(64, 2*file->amembs);
H5FD_t **x = H5MM_realloc(file->memb, n*sizeof(H5FD_t*));
if (!x)
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"unable to allocate memory block");
file->amembs = n;
file->memb = x;
file->nmembs = i;
}
/* Create another file if necessary */
if (i>=file->nmembs || !file->memb[i]) {
file->nmembs = MAX(file->nmembs, i+1);
sprintf(memb_name, file->name, i);
H5E_BEGIN_TRY {
file->memb[i] = H5FDopen(memb_name, file->flags|H5F_ACC_CREAT,
file->memb_fapl_id, file->memb_size);
} H5E_END_TRY;
if (NULL==file->memb[i])
HRETURN_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL,
"unable to open member file");
}
/* Set the EOA marker for the member */
if (addr>file->memb_size) {
H5FDset_eoa(file->memb[i], file->memb_size);
addr -= file->memb_size;
} else {
H5FDset_eoa(file->memb[i], addr);
addr = 0;
}
}
file->eoa = eoa;
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_get_eof
*
* Purpose: Returns the end-of-file marker, which is the greater of
* either the total family size or the current EOA marker.
*
* Return: Success: End of file address, the first address past
* the end of the family of files or the current
* EOA, whichever is larger.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_family_get_eof(H5FD_t *_file)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
haddr_t eof=0;
int i;
FUNC_ENTER(H5FD_family_get_eof, HADDR_UNDEF);
/*
* Find the last member that has a non-zero EOF and break out of the loop
* with `i' equal to that member. If all members have zero EOF then exit
* loop with i==0.
*/
for (i=file->nmembs-1; i>=0; --i) {
if ((eof=H5FDget_eof(file->memb[i])))
break;
if (0==i)
break;
}
/*
* The file size is the number of members before the i'th member plus the
* size of the i'th member.
*/
eof += i*file->memb_size;
FUNC_LEAVE(MAX(eof, file->eoa));
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_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
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
void *_buf/*out*/)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
unsigned char *buf = (unsigned char*)_buf;
hid_t memb_dxpl_id = H5P_DEFAULT;
int i;
haddr_t sub;
size_t req;
FUNC_ENTER(H5FD_family_read, FAIL);
/*
* Get the member data transfer property list. If the transfer property
* list does not belong to this driver then assume defaults
*/
if (H5P_DEFAULT!=dxpl_id && H5FD_FAMILY==H5P_get_driver(dxpl_id)) {
H5FD_family_dxpl_t *dx = H5Pget_driver_info(dxpl_id);
assert(H5P_DATASET_XFER==H5Pget_class(dxpl_id));
assert(dx);
memb_dxpl_id = dx->memb_dxpl_id;
}
/* Read from each member */
while (size>0) {
i = addr / file->memb_size;
sub = addr % file->memb_size;
req = MIN(size, file->memb_size-sub);
assert(i<file->nmembs);
if (H5FDread(file->memb[i], type, memb_dxpl_id, sub, req, buf)<0)
HRETURN_ERROR(H5E_IO, H5E_READERROR, FAIL,
"member file read failed");
addr += req;
buf += req;
size -= req;
}
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_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
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
const void *_buf)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
const unsigned char *buf = (const unsigned char*)_buf;
hid_t memb_dxpl_id = H5P_DEFAULT;
int i;
haddr_t sub;
size_t req;
FUNC_ENTER(H5FD_family_write, FAIL);
/*
* Get the member data transfer property list. If the transfer property
* list does not belong to this driver then assume defaults.
*/
if (H5P_DEFAULT!=dxpl_id && H5FD_FAMILY==H5P_get_driver(dxpl_id)) {
H5FD_family_dxpl_t *dx = H5Pget_driver_info(dxpl_id);
assert(H5P_DATASET_XFER==H5Pget_class(dxpl_id));
assert(dx);
memb_dxpl_id = dx->memb_dxpl_id;
}
/* Write to each member */
while (size>0) {
i = addr / file->memb_size;
sub = addr % file->memb_size;
req = MIN(size, file->memb_size-sub);
assert(i<file->nmembs);
if (H5FDwrite(file->memb[i], type, memb_dxpl_id, sub, req, buf)<0)
HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL,
"member file write failed");
addr += req;
buf += req;
size -= req;
}
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_family_flush
*
* Purpose: Flushes all family members.
*
* Return: Success: 0
*
* Failure: -1, as many files flushed as possible.
*
* Programmer: Robb Matzke
* Wednesday, August 4, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_family_flush(H5FD_t *_file)
{
H5FD_family_t *file = (H5FD_family_t*)_file;
int i, nerrors=0;
FUNC_ENTER(H5FD_family_flush, FAIL);
for (i=0; i<file->nmembs; i++)
if (file->memb[i] && H5FDflush(file->memb[i])<0)
nerrors++;
if (nerrors)
HRETURN_ERROR(H5E_IO, H5E_BADVALUE, FAIL,
"unable to flush member files");
FUNC_LEAVE(SUCCEED);
}