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