Subversion Repositories openrisc_2011-10-31

/* 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 */