Viewing file:  gmm_malloc.h (2.27 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Copyright (C) 2004-2022 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>
#if __STDC_HOSTED__
#include <errno.h>
#endif
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))
{
#if __STDC_HOSTED__
errno = EINVAL;
#endif
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 */
|
