78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Copyright (C) 2004 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 2, 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GCC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/* As a special exception, if you include this header file into source
|
|
files compiled by GCC, this header file does not by itself cause
|
|
the resulting executable to be covered by the GNU General Public
|
|
License. This exception does not however invalidate any other
|
|
reasons why the executable file might be covered by the GNU General
|
|
Public License. */
|
|
|
|
#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 */
|