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  1. /*===---- mm_malloc.h - Allocating and Freeing Aligned Memory Blocks -------===
  2.  *
  3.  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4.  * See https://llvm.org/LICENSE.txt for license information.
  5.  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6.  *
  7.  *===-----------------------------------------------------------------------===
  8.  */
  9.  
  10. #ifndef __MM_MALLOC_H
  11. #define __MM_MALLOC_H
  12.  
  13. #include <stdlib.h>
  14.  
  15. #ifdef _WIN32
  16. #include <malloc.h>
  17. #else
  18. #ifndef __cplusplus
  19. extern int posix_memalign(void **__memptr, size_t __alignment, size_t __size);
  20. #else
  21. // Some systems (e.g. those with GNU libc) declare posix_memalign with an
  22. // exception specifier. Via an "egregious workaround" in
  23. // Sema::CheckEquivalentExceptionSpec, Clang accepts the following as a valid
  24. // redeclaration of glibc's declaration.
  25. extern "C" int posix_memalign(void **__memptr, size_t __alignment, size_t __size);
  26. #endif
  27. #endif
  28.  
  29. #if !(defined(_WIN32) && defined(_mm_malloc))
  30. static __inline__ void *__attribute__((__always_inline__, __nodebug__,
  31.                                        __malloc__, __alloc_size__(1),
  32.                                        __alloc_align__(2)))
  33. _mm_malloc(size_t __size, size_t __align) {
  34.   if (__align == 1) {
  35.     return malloc(__size);
  36.   }
  37.  
  38.   if (!(__align & (__align - 1)) && __align < sizeof(void *))
  39.     __align = sizeof(void *);
  40.  
  41.   void *__mallocedMemory;
  42. #if defined(__MINGW32__)
  43.   __mallocedMemory = __mingw_aligned_malloc(__size, __align);
  44. #elif defined(_WIN32)
  45.   __mallocedMemory = _aligned_malloc(__size, __align);
  46. #else
  47.   if (posix_memalign(&__mallocedMemory, __align, __size))
  48.     return 0;
  49. #endif
  50.  
  51.   return __mallocedMemory;
  52. }
  53.  
  54. static __inline__ void __attribute__((__always_inline__, __nodebug__))
  55. _mm_free(void *__p)
  56. {
  57. #if defined(__MINGW32__)
  58.   __mingw_aligned_free(__p);
  59. #elif defined(_WIN32)
  60.   _aligned_free(__p);
  61. #else
  62.   free(__p);
  63. #endif
  64. }
  65. #endif
  66.  
  67. #endif /* __MM_MALLOC_H */
  68.