1 /*! \file exif-mem.h 2 * \brief Define the ExifMem data type and the associated functions. 3 * ExifMem defines the memory management functions used within libexif. 4 */ 5 /* exif-mem.h 6 * 7 * Copyright (c) 2003 Lutz Mueller <lutz@users.sourceforge.net> 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this library; if not, write to the 21 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22 * Boston, MA 02110-1301 USA. 23 */ 24 25 #ifndef __EXIF_MEM_H__ 26 #define __EXIF_MEM_H__ 27 28 #include <libexif/exif-utils.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif /* __cplusplus */ 33 34 /*! Should work like calloc() 35 * 36 * \param[in] s the size of the block to allocate. 37 * \return the allocated memory and initialized. 38 */ 39 typedef void * (* ExifMemAllocFunc) (ExifLong s); 40 41 /*! Should work like realloc() 42 * 43 * \param[in] p the pointer to reallocate 44 * \param[in] s the size of the reallocated block 45 * \return allocated memory 46 */ 47 typedef void * (* ExifMemReallocFunc) (void *p, ExifLong s); 48 49 /*! Free method for ExifMem 50 * 51 * \param[in] p the pointer to free 52 * \return the freed pointer 53 */ 54 typedef void (* ExifMemFreeFunc) (void *p); 55 56 /*! ExifMem define a memory allocator */ 57 typedef struct _ExifMem ExifMem; 58 59 /*! Create a new ExifMem 60 * 61 * \param[in] a the allocator function 62 * \param[in] r the reallocator function 63 * \param[in] f the free function 64 */ 65 ExifMem *exif_mem_new (ExifMemAllocFunc a, ExifMemReallocFunc r, 66 ExifMemFreeFunc f); 67 /*! Refcount an ExifMem 68 */ 69 void exif_mem_ref (ExifMem *); 70 71 /*! Unrefcount an ExifMem. 72 * If the refcount reaches 0, the ExifMem is freed 73 */ 74 void exif_mem_unref (ExifMem *); 75 76 void *exif_mem_alloc (ExifMem *m, ExifLong s); 77 void *exif_mem_realloc (ExifMem *m, void *p, ExifLong s); 78 void exif_mem_free (ExifMem *m, void *p); 79 80 /*! Create a new ExifMem with default values for your convenience 81 * 82 * \return return a new default ExifMem 83 */ 84 ExifMem *exif_mem_new_default (void); 85 86 #ifdef __cplusplus 87 } 88 #endif /* __cplusplus */ 89 90 #endif /* __EXIF_MEM_H__ */ 91