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/* Memory barrier operations. Generic version.
Copyright (C) 2008 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd 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 of the
License, or (at your option) any later version.
The GNU Hurd 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 this program. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _BITS_MEMORY_H
#define _BITS_MEMORY_H 1
/* Prevent read and write reordering across this function. */
static inline void
__memory_barrier (void)
{
/* Any lock'ed instruction will do. */
__sync_synchronize ();
}
/* Prevent read reordering across this function. */
#define __memory_read_barrier __memory_barrier
/* Prevent write reordering across this function. */
#define __memory_write_barrier __memory_barrier
#endif
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