| Bruce Beare | 0f2001b | 2011-01-27 10:24:52 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | #ifndef _SYS_ATOMICS_H |
| 29 | #define _SYS_ATOMICS_H |
| 30 | |
| 31 | #include <sys/cdefs.h> |
| 32 | #include <sys/time.h> |
| 33 | |
| 34 | __BEGIN_DECLS |
| 35 | |
| 36 | static inline __attribute__((always_inline)) int |
| 37 | __atomic_cmpxchg(int old, int _new, volatile int *ptr) |
| 38 | { |
| 39 | return !__sync_bool_compare_and_swap (ptr, old, _new); |
| 40 | } |
| 41 | |
| 42 | static inline __attribute__((always_inline)) int |
| 43 | __atomic_swap(int _new, volatile int *ptr) |
| 44 | { |
| 45 | return __sync_lock_test_and_set(ptr, _new); |
| 46 | } |
| 47 | |
| 48 | static inline __attribute__((always_inline)) int |
| 49 | __atomic_dec(volatile int *ptr) |
| 50 | { |
| 51 | return __sync_fetch_and_sub (ptr, 1); |
| 52 | } |
| 53 | |
| 54 | static inline __attribute__((always_inline)) int |
| 55 | __atomic_inc(volatile int *ptr) |
| 56 | { |
| 57 | return __sync_fetch_and_add (ptr, 1); |
| 58 | } |
| 59 | |
| 60 | int __futex_wait(volatile void *ftx, int val, const struct timespec *timeout); |
| 61 | int __futex_wake(volatile void *ftx, int count); |
| 62 | |
| 63 | __END_DECLS |
| 64 | |
| 65 | #endif /* _SYS_ATOMICS_H */ |