73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/**************************************************************************
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*
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* Copyright 2008-2010 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Memory alignment wrappers.
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*/
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#ifndef _OS_MEMORY_H_
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#error "Must not be included directly. Include os_memory.h instead"
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#endif
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#include "pipe/p_compiler.h"
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/**
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* Return memory on given byte alignment
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*/
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static INLINE void *
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os_malloc_aligned(size_t size, size_t alignment)
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{
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char *ptr, *buf;
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ptr = (char *) os_malloc(size + alignment + sizeof(void *));
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if (!ptr)
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return NULL;
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buf = (char *)(((uintptr_t)ptr + sizeof(void *) + alignment - 1) & ~((uintptr_t)(alignment - 1)));
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*(char **)(buf - sizeof(void *)) = ptr;
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return buf;
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}
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/**
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* Free memory returned by align_malloc().
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*/
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static INLINE void
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os_free_aligned(void *ptr)
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{
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if (ptr) {
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void **cubbyHole = (void **) ((char *) ptr - sizeof(void *));
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void *realAddr = *cubbyHole;
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os_free(realAddr);
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}
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}
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