1/*
2 * Copyright (C) 2008 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 _BIONIC_FUTEX_H
29#define _BIONIC_FUTEX_H
30
31#include <linux/futex.h>
32
33extern int __futex_wait(volatile void *ftx, int val, const struct timespec *timeout);
34extern int __futex_wake(volatile void *ftx, int count);
35
36extern int __futex_syscall3(volatile void *ftx, int op, int val);
37extern int __futex_syscall4(volatile void *ftx, int op, int val, const struct timespec *timeout);
38
39#ifndef FUTEX_PRIVATE_FLAG
40#define FUTEX_PRIVATE_FLAG  128
41#endif
42
43#ifndef FUTEX_WAIT_PRIVATE
44#define FUTEX_WAIT_PRIVATE  (FUTEX_WAIT|FUTEX_PRIVATE_FLAG)
45#endif
46
47#ifndef FUTEX_WAKE_PRIVATE
48#define FUTEX_WAKE_PRIVATE  (FUTEX_WAKE|FUTEX_PRIVATE_FLAG)
49#endif
50
51/* Like __futex_wait/wake, but take an additionnal 'pshared' argument.
52 * when non-0, this will use normal futexes. Otherwise, private futexes.
53 */
54extern int  __futex_wake_ex(volatile void *ftx, int pshared, int val);
55extern int  __futex_wait_ex(volatile void *ftx, int pshared, int val, const struct timespec *timeout);
56
57#endif /* _BIONIC_FUTEX_H */
58