1 /* $OpenBSD: futex.h,v 1.2 2018/08/26 06:50:30 visa Exp $ */ 2 /* 3 * Copyright (c) 2017 Martin Pieuchot 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 static inline int 19 futex_wake(volatile uint32_t *p, int n, int priv) 20 { 21 return futex(p, FUTEX_WAKE | priv, n, NULL, NULL); 22 } 23 24 static inline void 25 futex_wait(volatile uint32_t *p, int val, int priv) 26 { 27 while (*p != (uint32_t)val) 28 futex(p, FUTEX_WAIT | priv, val, NULL, NULL); 29 } 30 31 static inline int 32 futex_twait(volatile uint32_t *p, int val, clockid_t clockid, 33 const struct timespec *timeout, int priv) 34 { 35 return futex(p, FUTEX_WAIT | priv, val, timeout, NULL); 36 } 37 38 static inline int 39 futex_requeue(volatile uint32_t *p, int n, int m, volatile uint32_t *q) 40 { 41 return futex(p, FUTEX_REQUEUE, n, (void *)(long)m, q); 42 } 43