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/* Copyright (C) 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _MM_MALLOC_H_INCLUDED
#define _MM_MALLOC_H_INCLUDED
#include <stdlib.h>
#include <errno.h>
static __inline__ void*
_mm_malloc (size_t size, size_t align)
{
void * malloc_ptr;
void * aligned_ptr;
/* Error if align is not a power of two. */
if (align & (align - 1))
{
errno = EINVAL;
return ((void*) 0);
}
if (size == 0)
return ((void *) 0);
/* Assume malloc'd pointer is aligned at least to sizeof (void*).
If necessary, add another sizeof (void*) to store the value
returned by malloc. Effectively this enforces a minimum alignment
of sizeof double. */
if (align < 2 * sizeof (void *))
align = 2 * sizeof (void *);
malloc_ptr = malloc (size + align);
if (!malloc_ptr)
return ((void *) 0);
/* Align We have at least sizeof (void *) space below malloc'd ptr. */
aligned_ptr = (void *) (((size_t) malloc_ptr + align)
& ~((size_t) (align) - 1));
/* Store the original pointer just before p. */
((void **) aligned_ptr) [-1] = malloc_ptr;
return aligned_ptr;
}
static __inline__ void
_mm_free (void * aligned_ptr)
{
if (aligned_ptr)
free (((void **) aligned_ptr) [-1]);
}
#endif /* _MM_MALLOC_H_INCLUDED */
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