| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (memalign.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdint.h> |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | #include <memalign.h> |
| 27 | |
| 28 | void *memalign_alloc(size_t boundary, size_t size) |
| 29 | { |
| 30 | void **place = NULL; |
| 31 | uintptr_t addr = 0; |
| 32 | void *ptr = (void*)malloc(boundary + size + sizeof(uintptr_t)); |
| 33 | if (!ptr) |
| 34 | return NULL; |
| 35 | |
| 36 | addr = ((uintptr_t)ptr + sizeof(uintptr_t) + boundary) |
| 37 | & ~(boundary - 1); |
| 38 | place = (void**)addr; |
| 39 | place[-1] = ptr; |
| 40 | |
| 41 | return (void*)addr; |
| 42 | } |
| 43 | |
| 44 | void memalign_free(void *ptr) |
| 45 | { |
| 46 | void **p = NULL; |
| 47 | if (!ptr) |
| 48 | return; |
| 49 | |
| 50 | p = (void**)ptr; |
| 51 | free(p[-1]); |
| 52 | } |
| 53 | |
| 54 | void *memalign_alloc_aligned(size_t size) |
| 55 | { |
| 56 | #if defined(__x86_64__) || defined(__LP64) || defined(__IA64__) || defined(_M_X64) || defined(_M_X64) || defined(_WIN64) |
| 57 | return memalign_alloc(64, size); |
| 58 | #elif defined(__i386__) || defined(__i486__) || defined(__i686__) || defined(GEKKO) || defined(_M_IX86) |
| 59 | return memalign_alloc(32, size); |
| 60 | #else |
| 61 | return memalign_alloc(32, size); |
| 62 | #endif |
| 63 | } |