1 /**************************************************************************
3 * Copyright 2008-2010 VMware, Inc.
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8 * "Software"), to deal in the Software without restriction, including
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11 * permit persons to whom the Software is furnished to do so, subject to
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14 * The above copyright notice and this permission notice (including the
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19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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26 **************************************************************************/
30 * Memory alignment wrappers.
35 #error "Must not be included directly. Include os_memory.h instead"
39 #include "pipe/p_compiler.h"
43 * Return memory on given byte alignment
46 os_malloc_aligned(size_t size
, size_t alignment
)
50 ptr
= (char *) os_malloc(size
+ alignment
+ sizeof(void *));
54 buf
= (char *)(((uintptr_t)ptr
+ sizeof(void *) + alignment
- 1) & ~((uintptr_t)(alignment
- 1)));
55 *(char **)(buf
- sizeof(void *)) = ptr
;
62 * Free memory returned by align_malloc().
65 os_free_aligned(void *ptr
)
68 void **cubbyHole
= (void **) ((char *) ptr
- sizeof(void *));
69 void *realAddr
= *cubbyHole
;