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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Orefcount.c
*
* Purpose: Object reference count messages
*
*-------------------------------------------------------------------------
*/
#include "H5Omodule.h" /* This source code file is part of the H5O module */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5FLprivate.h" /* Free lists */
#include "H5Opkg.h" /* Object headers */
/* PRIVATE PROTOTYPES */
static void *H5O__refcount_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags, unsigned *ioflags,
size_t p_size, const uint8_t *p);
static herr_t H5O__refcount_encode(H5F_t *f, bool disable_shared, uint8_t *p, const void *_mesg);
static void *H5O__refcount_copy(const void *_mesg, void *_dest);
static size_t H5O__refcount_size(const H5F_t *f, bool disable_shared, const void *_mesg);
static herr_t H5O__refcount_free(void *_mesg);
static herr_t H5O__refcount_pre_copy_file(H5F_t *file_src, const void *mesg_src, bool *deleted,
const H5O_copy_t *cpy_info, void *udata);
static herr_t H5O__refcount_debug(H5F_t *f, const void *_mesg, FILE *stream, int indent, int fwidth);
/* This message derives from H5O message class */
const H5O_msg_class_t H5O_MSG_REFCOUNT[1] = {{
H5O_REFCOUNT_ID, /*message id number */
"refcount", /*message name for debugging */
sizeof(H5O_refcount_t), /*native message size */
0, /* messages are shareable? */
H5O__refcount_decode, /*decode message */
H5O__refcount_encode, /*encode message */
H5O__refcount_copy, /*copy the native value */
H5O__refcount_size, /*size of symbol table entry */
NULL, /*default reset method */
H5O__refcount_free, /* free method */
NULL, /* file delete method */
NULL, /* link method */
NULL, /*set share method */
NULL, /*can share method */
H5O__refcount_pre_copy_file, /* pre copy native value to file */
NULL, /* copy native value to file */
NULL, /* post copy native value to file */
NULL, /* get creation index */
NULL, /* set creation index */
H5O__refcount_debug /*debug the message */
}};
/* Current version of ref. count information */
#define H5O_REFCOUNT_VERSION 0
/* Declare a free list to manage the H5O_refcount_t struct */
H5FL_DEFINE_STATIC(H5O_refcount_t);
/*-------------------------------------------------------------------------
* Function: H5O__refcount_decode
*
* Purpose: Decode a message and return a pointer to a newly allocated
* one.
*
* Return: Success: Pointer to new message in native form
* Failure: NULL
*-------------------------------------------------------------------------
*/
static void *
H5O__refcount_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, size_t p_size,
const uint8_t *p)
{
H5O_refcount_t *refcount = NULL; /* Reference count */
const uint8_t *p_end = p + p_size - 1; /* End of the p buffer */
void *ret_value = NULL;
FUNC_ENTER_PACKAGE
assert(f);
assert(p);
/* Version of message */
if (H5_IS_BUFFER_OVERFLOW(p, 1, p_end))
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding");
if (*p++ != H5O_REFCOUNT_VERSION)
HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for message");
/* Allocate space for message */
if (NULL == (refcount = H5FL_MALLOC(H5O_refcount_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
/* Get reference count for object */
if (H5_IS_BUFFER_OVERFLOW(p, 4, p_end))
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding");
UINT32DECODE(p, *refcount);
/* Set return value */
ret_value = refcount;
done:
if (!ret_value && refcount)
H5FL_FREE(H5O_refcount_t, refcount);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__refcount_decode() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_encode
*
* Purpose: Encodes a message.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__refcount_encode(H5F_t H5_ATTR_UNUSED *f, bool H5_ATTR_UNUSED disable_shared, uint8_t *p,
const void *_mesg)
{
const H5O_refcount_t *refcount = (const H5O_refcount_t *)_mesg;
FUNC_ENTER_PACKAGE_NOERR
/* check args */
assert(f);
assert(p);
assert(refcount);
/* Message version */
*p++ = H5O_REFCOUNT_VERSION;
/* Object's ref. count */
UINT32ENCODE(p, *refcount);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__refcount_encode() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_copy
*
* Purpose: Copies a message from _MESG to _DEST, allocating _DEST if
* necessary.
*
* Return: Success: Ptr to _DEST
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
static void *
H5O__refcount_copy(const void *_mesg, void *_dest)
{
const H5O_refcount_t *refcount = (const H5O_refcount_t *)_mesg;
H5O_refcount_t *dest = (H5O_refcount_t *)_dest;
void *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
/* check args */
assert(refcount);
if (!dest && NULL == (dest = H5FL_MALLOC(H5O_refcount_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
/* copy */
*dest = *refcount;
/* Set return value */
ret_value = dest;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__refcount_copy() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_size
*
* Purpose: Returns the size of the raw message in bytes not counting
* the message type or size fields, but only the data fields.
* This function doesn't take into account alignment.
*
* Return: Success: Message data size in bytes without alignment.
* Failure: zero
*
*-------------------------------------------------------------------------
*/
static size_t
H5O__refcount_size(const H5F_t H5_ATTR_UNUSED *f, bool H5_ATTR_UNUSED disable_shared,
const void H5_ATTR_UNUSED *_mesg)
{
size_t ret_value = 0; /* Return value */
FUNC_ENTER_PACKAGE_NOERR
/* Set return value */
ret_value = 1 /* Version */
+ 4; /* Ref. count */
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__refcount_size() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_free
*
* Purpose: Frees the message
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__refcount_free(void *mesg)
{
FUNC_ENTER_PACKAGE_NOERR
assert(mesg);
mesg = H5FL_FREE(H5O_refcount_t, mesg);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__refcount_free() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_pre_copy_file
*
* Purpose: Perform any necessary actions before copying message between
* files.
*
* Return: Success: Non-negative
* Failure: Negative
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__refcount_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED *native_src,
bool *deleted, const H5O_copy_t H5_ATTR_UNUSED *cpy_info,
void H5_ATTR_UNUSED *udata)
{
FUNC_ENTER_PACKAGE_NOERR
/* check args */
assert(deleted);
assert(cpy_info);
/* Always delete this message when copying objects between files. Let
* the copy routine set the correct ref. count.
*/
*deleted = true;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__refcount_pre_copy_file() */
/*-------------------------------------------------------------------------
* Function: H5O__refcount_debug
*
* Purpose: Prints debugging info for a message.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__refcount_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream, int indent, int fwidth)
{
const H5O_refcount_t *refcount = (const H5O_refcount_t *)_mesg;
FUNC_ENTER_PACKAGE_NOERR
/* check args */
assert(f);
assert(refcount);
assert(stream);
assert(indent >= 0);
assert(fwidth >= 0);
fprintf(stream, "%*s%-*s %u\n", indent, "", fwidth, "Number of links:", (unsigned)*refcount);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__refcount_debug() */
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