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/*! \file exif-mem.h
* \brief Define the ExifMem data type and the associated functions.
* ExifMem defines the memory management functions used within libexif.
*/
/* exif-mem.h
*
* Copyright (c) 2003 Lutz Mueller <lutz@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*/
#ifndef __EXIF_MEM_H__
#define __EXIF_MEM_H__
#include <libexif/exif-utils.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/*! Should work like calloc()
*
* \param[in] s the size of the block to allocate.
* \return the allocated memory and initialized.
*/
typedef void * (* ExifMemAllocFunc) (ExifLong s);
/*! Should work like realloc()
*
* \param[in] p the pointer to reallocate
* \param[in] s the size of the reallocated block
* \return allocated memory
*/
typedef void * (* ExifMemReallocFunc) (void *p, ExifLong s);
/*! Free method for ExifMem
*
* \param[in] p the pointer to free
* \return the freed pointer
*/
typedef void (* ExifMemFreeFunc) (void *p);
/*! ExifMem define a memory allocator */
typedef struct _ExifMem ExifMem;
/*! Create a new ExifMem
*
* \param[in] a the allocator function
* \param[in] r the reallocator function
* \param[in] f the free function
*/
ExifMem *exif_mem_new (ExifMemAllocFunc a, ExifMemReallocFunc r,
ExifMemFreeFunc f);
/*! Refcount an ExifMem
*/
void exif_mem_ref (ExifMem *);
/*! Unrefcount an ExifMem.
* If the refcount reaches 0, the ExifMem is freed
*/
void exif_mem_unref (ExifMem *);
void *exif_mem_alloc (ExifMem *m, ExifLong s);
void *exif_mem_realloc (ExifMem *m, void *p, ExifLong s);
void exif_mem_free (ExifMem *m, void *p);
/*! Create a new ExifMem with default values for your convenience
*
* \return return a new default ExifMem
*/
ExifMem *exif_mem_new_default (void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __EXIF_MEM_H__ */
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