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hdf5/src/H5Orefcount.c
Quincey Koziol f38864920d Merge branch 'develop' of https://bitbucket.hdfgroup.org/scm/hdffv/hdf5 into merge_func_enter_vol 
Plus initial steps toward merging API context push into FUNC_ENTER_API* macros
2018-03-18 18:36:49 -05:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Orefcount.c
* Mar 10 2007
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: Object ref. 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, hbool_t 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, hbool_t 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,
hbool_t *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 sharable? */
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: Ptr to new message in native form.
* Failure: NULL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 10 2007
*
*-------------------------------------------------------------------------
*/
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 H5_ATTR_UNUSED p_size, const uint8_t *p)
{
H5O_refcount_t *refcount = NULL; /* Reference count */
void *ret_value = NULL; /* Return value */
FUNC_ENTER_STATIC
/* check args */
HDassert(f);
HDassert(p);
/* Version of message */
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 ref. count for object */
UINT32DECODE(p, *refcount)
/* Set return value */
ret_value = refcount;
done:
if(ret_value == NULL && refcount != NULL)
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
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 10 2007
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O_refcount_encode(H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, const void *_mesg)
{
const H5O_refcount_t *refcount = (const H5O_refcount_t *)_mesg;
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* check args */
HDassert(f);
HDassert(p);
HDassert(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
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 10 2007
*
*-------------------------------------------------------------------------
*/
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_NOAPI_NOINIT
/* check args */
HDassert(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
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 10 2007
*
*-------------------------------------------------------------------------
*/
static size_t
H5O_refcount_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_shared,
const void H5_ATTR_UNUSED *_mesg)
{
size_t ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT_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
*
* Programmer: Quincey Koziol
* Tuesday, March 10, 2007
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__refcount_free(void *mesg)
{
FUNC_ENTER_STATIC_NOERR
HDassert(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
*
* Programmer: Quincey Koziol
* Saturday, March 10, 2007
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O_refcount_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED *native_src,
hbool_t *deleted, const H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *udata)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* check args */
HDassert(deleted);
HDassert(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
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 6 2007
*
*-------------------------------------------------------------------------
*/
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_STATIC_NOERR
/* check args */
HDassert(f);
HDassert(refcount);
HDassert(stream);
HDassert(indent >= 0);
HDassert(fwidth >= 0);
HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
"Number of links:", (unsigned)*refcount);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__refcount_debug() */
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