1/* $NetBSD: cnd.c,v 1.1 2019/04/24 11:43:19 kamil Exp $ */ 2 3/*- 4 * Copyright (c) 2016 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Kamil Rytarowski. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__RCSID("$NetBSD: cnd.c,v 1.1 2019/04/24 11:43:19 kamil Exp $"); 34 35#include <assert.h> 36#include <errno.h> 37#include <pthread.h> 38#include <threads.h> 39 40int 41cnd_broadcast(cnd_t *cond) 42{ 43 44 _DIAGASSERT(cond != NULL); 45 46 if (pthread_cond_broadcast(cond) == 0) 47 return thrd_success; 48 49 return thrd_error; 50} 51 52void 53cnd_destroy(cnd_t *cond) 54{ 55 56 _DIAGASSERT(cond != NULL); 57 58 /* 59 * The cnd_destroy(3) function that conforms to C11 returns no value. 60 */ 61 (void)pthread_cond_destroy(cond); 62} 63 64int 65cnd_init(cnd_t *cond) 66{ 67 68 _DIAGASSERT(cond != NULL); 69 70 if (pthread_cond_init(cond, NULL) == 0) 71 return thrd_success; 72 73 return thrd_error; 74} 75 76int 77cnd_signal(cnd_t *cond) 78{ 79 80 _DIAGASSERT(cond != NULL); 81 82 if (pthread_cond_signal(cond) == 0) 83 return thrd_success; 84 85 return thrd_error; 86} 87 88int 89cnd_timedwait(cnd_t * __restrict cond, mtx_t * __restrict mtx, 90 const struct timespec * __restrict ts) 91{ 92 93 _DIAGASSERT(cond != NULL); 94 _DIAGASSERT(mtx != NULL); 95 _DIAGASSERT(ts != NULL); 96 97 switch (pthread_cond_timedwait(cond, mtx, ts)) { 98 case 0: 99 return thrd_success; 100 case ETIMEDOUT: 101 return thrd_timedout; 102 default: 103 return thrd_error; 104 } 105} 106 107int 108cnd_wait(cnd_t *cond, mtx_t *mtx) 109{ 110 111 _DIAGASSERT(cond != NULL); 112 _DIAGASSERT(mtx != NULL); 113 114 if (pthread_cond_wait(cond, mtx) == 0) 115 return thrd_success; 116 117 return thrd_error; 118} 119