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
memalign_alloc(size_t boundary,size_t size)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
memalign_free(void * ptr)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
memalign_alloc_aligned(size_t size)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 }
64