view gcc/config/i386/gmm_malloc.h @ 111:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents a06113de4d67
children 84e7813d76e9
line wrap: on
line source

/* Copyright (C) 2004-2017 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
   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
   <>.  */


#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 */