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 #include <sys/cdefs.h> 33 34 __BEGIN_DECLS 35 36 extern int __futex_wait(volatile void *ftx, int val, const struct timespec *timeout); 37 extern int __futex_wake(volatile void *ftx, int count); 38 39 extern int __futex_syscall3(volatile void *ftx, int op, int val); 40 extern int __futex_syscall4(volatile void *ftx, int op, int val, const struct timespec *timeout); 41 42 #ifndef FUTEX_PRIVATE_FLAG 43 #define FUTEX_PRIVATE_FLAG 128 44 #endif 45 46 #ifndef FUTEX_WAIT_PRIVATE 47 #define FUTEX_WAIT_PRIVATE (FUTEX_WAIT|FUTEX_PRIVATE_FLAG) 48 #endif 49 50 #ifndef FUTEX_WAKE_PRIVATE 51 #define FUTEX_WAKE_PRIVATE (FUTEX_WAKE|FUTEX_PRIVATE_FLAG) 52 #endif 53 54 /* Like __futex_wait/wake, but take an additionnal 'pshared' argument. 55 * when non-0, this will use normal futexes. Otherwise, private futexes. 56 */ 57 extern int __futex_wake_ex(volatile void *ftx, int pshared, int val); 58 extern int __futex_wait_ex(volatile void *ftx, int pshared, int val, const struct timespec *timeout); 59 60 __END_DECLS 61 62 #endif /* _BIONIC_FUTEX_H */ 63
