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/* atomic.h - wrapper for atomic gcc built-ins
*
* Copyright (C) 2009 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or later as
* published by the Free Software Foundation.
*
* See http://www.gnu.org/ for details.
*/
#ifndef TF_ATOMIC_H
#define TF_ATOMIC_H
#define tf_atomic_inc(var) \
__sync_add_and_fetch(&(var), 1)
#define tf_atomic_dec(var) \
__sync_add_and_fetch(&(var), -1)
#define tf_atomic_cmpxchg(ptr, old, new) \
__sync_bool_compare_and_swap(ptr, old, new)
#define tf_atomic_xchg(ptr, new) \
((typeof(*(ptr)))__sync_lock_test_and_set(ptr, new))
#endif
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