зеркало из https://github.com/microsoft/clang-1.git
60 строки
2.0 KiB
C
60 строки
2.0 KiB
C
/*===---- mm_malloc.h - Allocating and Freeing Aligned Memory Blocks -------===
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __MM_MALLOC_H
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#define __MM_MALLOC_H
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#include <errno.h>
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#include <stdlib.h>
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static inline void *__attribute__((__always_inline__, __nodebug__)) _mm_malloc(size_t size, size_t align)
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{
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if (align & (align - 1)) {
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errno = EINVAL;
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return 0;
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}
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if (!size)
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return 0;
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if (align < 2 * sizeof(void *))
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align = 2 * sizeof(void *);
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void *mallocedMemory = malloc(size + align);
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if (!mallocedMemory)
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return 0;
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void *alignedMemory = (void *)(((size_t)mallocedMemory + align) & ~((size_t)align - 1));
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((void **)alignedMemory)[-1] = mallocedMemory;
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return alignedMemory;
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}
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static inline void __attribute__((__always_inline__, __nodebug__)) _mm_free(void *p)
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{
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if (p)
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free(((void **)p)[-1]);
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}
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#endif /* __MM_MALLOC_H */
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