external/bsd/llvm/dist/clang/lib/Headers/mm_malloc.h

   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 */