clang  6.0.0svn
mm_malloc.h
Go to the documentation of this file.
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 
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 */
int posix_memalign(void **__memptr, size_t __alignment, size_t __size)
static __inline unsigned char unsigned int unsigned int unsigned int * __p
Definition: adxintrin.h:38
static __inline__ void size_t __align
Definition: mm_malloc.h:47
void * __mallocedMemory
Definition: mm_malloc.h:55
static __inline__ void * __attribute__((__always_inline__, __nodebug__, __malloc__)) _mm_malloc(size_t __size