| /* |
| * Copyright (C) 2008 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 _BIONIC_FUTEX_H |
| #define _BIONIC_FUTEX_H |
| |
| #include <errno.h> |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <sys/cdefs.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| #define FUTEX_WAIT 0 |
| #define FUTEX_WAKE 1 |
| #define FUTEX_FD 2 |
| #define FUTEX_REQUEUE 3 |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_CMP_REQUEUE 4 |
| #define FUTEX_WAKE_OP 5 |
| #define FUTEX_LOCK_PI 6 |
| #define FUTEX_UNLOCK_PI 7 |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_TRYLOCK_PI 8 |
| #define FUTEX_WAIT_BITSET 9 |
| #define FUTEX_WAKE_BITSET 10 |
| #define FUTEX_WAIT_REQUEUE_PI 11 |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_CMP_REQUEUE_PI 12 |
| #define FUTEX_PRIVATE_FLAG 128 |
| #define FUTEX_CLOCK_REALTIME 256 |
| #define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME) |
| #define FUTEX_TID_MASK 0x3fffffff |
| #define FUTEX_OWNER_DIED 0x40000000 |
| #define FUTEX_WAITERS 0x80000000 |
| |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_REQUEUE_PRIVATE (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG) |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_WAKE_OP_PRIVATE (FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_LOCK_PI_PRIVATE (FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_UNLOCK_PI_PRIVATE (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG) |
| /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ |
| #define FUTEX_WAIT_BITSET_PRIVATE (FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_WAKE_BITSET_PRIVATE (FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_WAIT_REQUEUE_PI_PRIVATE (FUTEX_WAIT_REQUEUE_PI | FUTEX_PRIVATE_FLAG) |
| #define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | FUTEX_PRIVATE_FLAG) |
| #ifndef __predict_false |
| #define __predict_false(exp) __builtin_expect((exp) != 0, 0) |
| #endif // __predict_false |
| |
| struct timespec; |
| |
| static inline __always_inline int __futex(volatile void* ftx, int op, int value, const struct timespec* timeout) |
| { |
| // Our generated syscall assembler sets errno, but our callers (pthread functions) don't want to. |
| int result = syscall(__NR_futex, ftx, op, value, timeout); |
| return result; |
| } |
| |
| static inline int __futex_wake(volatile void* ftx, int count) |
| { |
| return __futex(ftx, FUTEX_WAKE, count, NULL); |
| } |
| |
| static inline int __futex_wake_ex(volatile void* ftx, bool shared, int count) |
| { |
| return __futex(ftx, shared ? FUTEX_WAKE : FUTEX_WAKE_PRIVATE, count, NULL); |
| } |
| |
| static inline int __futex_wait(volatile void* ftx, int value, const struct timespec* timeout) |
| { |
| return __futex(ftx, FUTEX_WAIT, value, timeout); |
| } |
| |
| static inline int __futex_wait_ex(volatile void* ftx, bool shared, int value, const struct timespec* timeout) |
| { |
| return __futex(ftx, shared ? FUTEX_WAIT : FUTEX_WAIT_PRIVATE, value, timeout); |
| } |
| |
| #endif /* _BIONIC_FUTEX_H */ |