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| 1 /*===---- mm_malloc.h - Allocating and Freeing Aligned Memory Blocks -------=== |
| 2 * |
| 3 * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 * of this software and associated documentation files (the "Software"), to deal |
| 5 * in the Software without restriction, including without limitation the rights |
| 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 * copies of the Software, and to permit persons to whom the Software is |
| 8 * furnished to do so, subject to the following conditions: |
| 9 * |
| 10 * The above copyright notice and this permission notice shall be included in |
| 11 * all copies or substantial portions of the Software. |
| 12 * |
| 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 * THE SOFTWARE. |
| 20 * |
| 21 *===-----------------------------------------------------------------------=== |
| 22 */ |
| 23 |
| 24 #ifndef __MM_MALLOC_H |
| 25 #define __MM_MALLOC_H |
| 26 |
| 27 #include <stdlib.h> |
| 28 |
| 29 #ifdef _WIN32 |
| 30 #include <malloc.h> |
| 31 #else |
| 32 #ifndef __cplusplus |
| 33 extern int posix_memalign(void **memptr, size_t alignment, size_t size); |
| 34 #else |
| 35 // Some systems (e.g. those with GNU libc) declare posix_memalign with an |
| 36 // exception specifier. Via an "egregious workaround" in |
| 37 // Sema::CheckEquivalentExceptionSpec, Clang accepts the following as a valid |
| 38 // redeclaration of glibc's declaration. |
| 39 extern "C" int posix_memalign(void **memptr, size_t alignment, size_t size); |
| 40 #endif |
| 41 #endif |
| 42 |
| 43 #if !(defined(_WIN32) && defined(_mm_malloc)) |
| 44 static __inline__ void *__attribute__((__always_inline__, __nodebug__, |
| 45 __malloc__)) |
| 46 _mm_malloc(size_t size, size_t align) |
| 47 { |
| 48 if (align == 1) { |
| 49 return malloc(size); |
| 50 } |
| 51 |
| 52 if (!(align & (align - 1)) && align < sizeof(void *)) |
| 53 align = sizeof(void *); |
| 54 |
| 55 void *mallocedMemory; |
| 56 #if defined(__MINGW32__) |
| 57 mallocedMemory = __mingw_aligned_malloc(size, align); |
| 58 #elif defined(_WIN32) |
| 59 mallocedMemory = _aligned_malloc(size, align); |
| 60 #else |
| 61 if (posix_memalign(&mallocedMemory, align, size)) |
| 62 return 0; |
| 63 #endif |
| 64 |
| 65 return mallocedMemory; |
| 66 } |
| 67 |
| 68 static __inline__ void __attribute__((__always_inline__, __nodebug__)) |
| 69 _mm_free(void *p) |
| 70 { |
| 71 free(p); |
| 72 } |
| 73 #endif |
| 74 |
| 75 #endif /* __MM_MALLOC_H */ |
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