Anders Carlsson | d4a5c9a | 2009-01-08 23:30:09 +0000 | [diff] [blame] | 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 <errno.h> |
| 28 | #include <stdlib.h> |
| 29 | |
Anders Carlsson | a2f12ae | 2009-02-14 01:00:11 +0000 | [diff] [blame] | 30 | static inline void *__attribute__((__always_inline__, __nodebug__)) _mm_malloc(size_t size, size_t align) |
Anders Carlsson | d4a5c9a | 2009-01-08 23:30:09 +0000 | [diff] [blame] | 31 | { |
| 32 | if (align & (align - 1)) { |
| 33 | errno = EINVAL; |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | if (!size) |
| 38 | return 0; |
| 39 | |
| 40 | if (align < 2 * sizeof(void *)) |
| 41 | align = 2 * sizeof(void *); |
| 42 | |
| 43 | void *mallocedMemory = malloc(size + align); |
| 44 | if (!mallocedMemory) |
| 45 | return 0; |
| 46 | |
| 47 | void *alignedMemory = (void *)(((size_t)mallocedMemory + align) & ~((size_t)align - 1)); |
| 48 | ((void **)alignedMemory)[-1] = mallocedMemory; |
| 49 | |
| 50 | return alignedMemory; |
| 51 | } |
| 52 | |
Anders Carlsson | a2f12ae | 2009-02-14 01:00:11 +0000 | [diff] [blame] | 53 | static inline void __attribute__((__always_inline__, __nodebug__)) _mm_free(void *p) |
Anders Carlsson | d4a5c9a | 2009-01-08 23:30:09 +0000 | [diff] [blame] | 54 | { |
| 55 | if (p) |
| 56 | free(((void **)p)[-1]); |
| 57 | } |
| 58 | |
| 59 | #endif /* __MM_MALLOC_H */ |