2 * Copyright (c) 2005, Herve Drolon, FreeImage Team
3 * Copyright (c) 2007, Callum Lerwick <seg@haxxed.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 #ifndef __OPJ_MALLOC_H
28 #define __OPJ_MALLOC_H
31 @brief Internal functions
33 The functions in opj_malloc.h are internal utilities used for memory management.
36 /** @defgroup MISC MISC - Miscellaneous internal functions */
39 /** @name Exported functions */
41 /* ----------------------------------------------------------------------- */
44 Allocate an uninitialized memory block
45 @param size Bytes to allocate
46 @return Returns a void pointer to the allocated space, or NULL if there is insufficient memory available
49 void * OPJ_CALLCONV opj_malloc(size_t size);
51 /* prevent assertion on overflow for MSVC */
53 #define opj_malloc(size) ((size_t)(size) >= (size_t)-0x100 ? NULL : malloc(size))
55 #define opj_malloc(size) malloc(size)
60 Allocate a memory block with elements initialized to 0
61 @param num Blocks to allocate
62 @param size Bytes per block to allocate
63 @return Returns a void pointer to the allocated space, or NULL if there is insufficient memory available
66 void * OPJ_CALLCONV opj_calloc(size_t _NumOfElements, size_t _SizeOfElements);
68 /* prevent assertion on overflow for MSVC */
70 #define opj_calloc(num, size) ((size_t)(num) != 0 && (size_t)(num) >= (size_t)-0x100 / (size_t)(size) ? NULL : calloc(num, size))
72 #define opj_calloc(num, size) calloc(num, size)
77 Allocate memory aligned to a 16 byte boundry
78 @param size Bytes to allocate
79 @return Returns a void pointer to the allocated space, or NULL if there is insufficient memory available
81 /* FIXME: These should be set with cmake tests, but we're currently not requiring use of cmake */
83 /* Someone should tell the mingw people that their malloc.h ought to provide _mm_malloc() */
85 #include <mm_malloc.h>
86 #define HAVE_MM_MALLOC
87 #else /* MSVC, Intel C++ */
90 #define HAVE_MM_MALLOC
93 #else /* Not _WIN32 */
96 #elif defined(__FreeBSD__)
97 #define HAVE_POSIX_MEMALIGN
98 /* Linux x86_64 and OSX always align allocations to 16 bytes */
99 #elif !defined(__amd64__) && !defined(__APPLE__) && !defined(_AIX)
100 #define HAVE_MEMALIGN
105 #define opj_aligned_malloc(size) malloc(size)
106 #define opj_aligned_free(m) free(m)
108 #ifdef HAVE_MM_MALLOC
109 #undef opj_aligned_malloc
110 #define opj_aligned_malloc(size) _mm_malloc(size, 16)
111 #undef opj_aligned_free
112 #define opj_aligned_free(m) _mm_free(m)
116 extern void* memalign(size_t, size_t);
117 #undef opj_aligned_malloc
118 #define opj_aligned_malloc(size) memalign(16, (size))
119 #undef opj_aligned_free
120 #define opj_aligned_free(m) free(m)
123 #ifdef HAVE_POSIX_MEMALIGN
124 #undef opj_aligned_malloc
125 extern int posix_memalign(void**, size_t, size_t);
127 static INLINE void* __attribute__ ((malloc)) opj_aligned_malloc(size_t size){
129 posix_memalign(&mem, 16, size);
132 #undef opj_aligned_free
133 #define opj_aligned_free(m) free(m)
136 #ifdef ALLOC_PERF_OPT
137 #undef opj_aligned_malloc
138 #define opj_aligned_malloc(size) opj_malloc(size)
139 #undef opj_aligned_free
140 #define opj_aligned_free(m) opj_free(m)
144 Reallocate memory blocks.
145 @param m Pointer to previously allocated memory block
146 @param s New size in bytes
147 @return Returns a void pointer to the reallocated (and possibly moved) memory block
149 #ifdef ALLOC_PERF_OPT
150 void * OPJ_CALLCONV opj_realloc(void * m, size_t s);
152 /* prevent assertion on overflow for MSVC */
154 #define opj_realloc(m, s) ((size_t)(s) >= (size_t)-0x100 ? NULL : realloc(m, s))
156 #define opj_realloc(m, s) realloc(m, s)
161 Deallocates or frees a memory block.
162 @param m Previously allocated memory block to be freed
164 #ifdef ALLOC_PERF_OPT
165 void OPJ_CALLCONV opj_free(void * m);
167 #define opj_free(m) free(m)
171 #pragma GCC poison malloc calloc realloc free
174 /* ----------------------------------------------------------------------- */
179 #endif /* __OPJ_MALLOC_H */