0f2001b147
Change-Id: I14f275392fcd70cc15e307470e0a099777c7c09e Author: H.J. Lu <hjl.tools@gmail.com> Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_ATOMICS_H
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#define _SYS_ATOMICS_H
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#include <sys/cdefs.h>
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#include <sys/time.h>
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__BEGIN_DECLS
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static inline __attribute__((always_inline)) int
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__atomic_cmpxchg(int old, int _new, volatile int *ptr)
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{
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return !__sync_bool_compare_and_swap (ptr, old, _new);
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}
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static inline __attribute__((always_inline)) int
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__atomic_swap(int _new, volatile int *ptr)
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{
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return __sync_lock_test_and_set(ptr, _new);
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}
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static inline __attribute__((always_inline)) int
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__atomic_dec(volatile int *ptr)
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{
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return __sync_fetch_and_sub (ptr, 1);
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}
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static inline __attribute__((always_inline)) int
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__atomic_inc(volatile int *ptr)
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{
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return __sync_fetch_and_add (ptr, 1);
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}
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int __futex_wait(volatile void *ftx, int val, const struct timespec *timeout);
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int __futex_wake(volatile void *ftx, int count);
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__END_DECLS
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#endif /* _SYS_ATOMICS_H */
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