cnd.c revision 1.1.2.2
1 1.1.2.2 christos /* $NetBSD: cnd.c,v 1.1.2.2 2019/06/10 22:05:26 christos Exp $ */ 2 1.1.2.2 christos 3 1.1.2.2 christos /*- 4 1.1.2.2 christos * Copyright (c) 2016 The NetBSD Foundation, Inc. 5 1.1.2.2 christos * All rights reserved. 6 1.1.2.2 christos * 7 1.1.2.2 christos * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 christos * by Kamil Rytarowski. 9 1.1.2.2 christos * 10 1.1.2.2 christos * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 christos * modification, are permitted provided that the following conditions 12 1.1.2.2 christos * are met: 13 1.1.2.2 christos * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 christos * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 christos * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 christos * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 christos * documentation and/or other materials provided with the distribution. 18 1.1.2.2 christos * 19 1.1.2.2 christos * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 christos * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 christos * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 christos * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 christos * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 christos * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 christos * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 christos * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 christos * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 christos * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 christos * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 christos */ 31 1.1.2.2 christos 32 1.1.2.2 christos #include <sys/cdefs.h> 33 1.1.2.2 christos __RCSID("$NetBSD: cnd.c,v 1.1.2.2 2019/06/10 22:05:26 christos Exp $"); 34 1.1.2.2 christos 35 1.1.2.2 christos #include <assert.h> 36 1.1.2.2 christos #include <errno.h> 37 1.1.2.2 christos #include <pthread.h> 38 1.1.2.2 christos #include <threads.h> 39 1.1.2.2 christos 40 1.1.2.2 christos int 41 1.1.2.2 christos cnd_broadcast(cnd_t *cond) 42 1.1.2.2 christos { 43 1.1.2.2 christos 44 1.1.2.2 christos _DIAGASSERT(cond != NULL); 45 1.1.2.2 christos 46 1.1.2.2 christos if (pthread_cond_broadcast(cond) == 0) 47 1.1.2.2 christos return thrd_success; 48 1.1.2.2 christos 49 1.1.2.2 christos return thrd_error; 50 1.1.2.2 christos } 51 1.1.2.2 christos 52 1.1.2.2 christos void 53 1.1.2.2 christos cnd_destroy(cnd_t *cond) 54 1.1.2.2 christos { 55 1.1.2.2 christos 56 1.1.2.2 christos _DIAGASSERT(cond != NULL); 57 1.1.2.2 christos 58 1.1.2.2 christos /* 59 1.1.2.2 christos * The cnd_destroy(3) function that conforms to C11 returns no value. 60 1.1.2.2 christos */ 61 1.1.2.2 christos (void)pthread_cond_destroy(cond); 62 1.1.2.2 christos } 63 1.1.2.2 christos 64 1.1.2.2 christos int 65 1.1.2.2 christos cnd_init(cnd_t *cond) 66 1.1.2.2 christos { 67 1.1.2.2 christos 68 1.1.2.2 christos _DIAGASSERT(cond != NULL); 69 1.1.2.2 christos 70 1.1.2.2 christos if (pthread_cond_init(cond, NULL) == 0) 71 1.1.2.2 christos return thrd_success; 72 1.1.2.2 christos 73 1.1.2.2 christos return thrd_error; 74 1.1.2.2 christos } 75 1.1.2.2 christos 76 1.1.2.2 christos int 77 1.1.2.2 christos cnd_signal(cnd_t *cond) 78 1.1.2.2 christos { 79 1.1.2.2 christos 80 1.1.2.2 christos _DIAGASSERT(cond != NULL); 81 1.1.2.2 christos 82 1.1.2.2 christos if (pthread_cond_signal(cond) == 0) 83 1.1.2.2 christos return thrd_success; 84 1.1.2.2 christos 85 1.1.2.2 christos return thrd_error; 86 1.1.2.2 christos } 87 1.1.2.2 christos 88 1.1.2.2 christos int 89 1.1.2.2 christos cnd_timedwait(cnd_t * __restrict cond, mtx_t * __restrict mtx, 90 1.1.2.2 christos const struct timespec * __restrict ts) 91 1.1.2.2 christos { 92 1.1.2.2 christos 93 1.1.2.2 christos _DIAGASSERT(cond != NULL); 94 1.1.2.2 christos _DIAGASSERT(mtx != NULL); 95 1.1.2.2 christos _DIAGASSERT(ts != NULL); 96 1.1.2.2 christos 97 1.1.2.2 christos switch (pthread_cond_timedwait(cond, mtx, ts)) { 98 1.1.2.2 christos case 0: 99 1.1.2.2 christos return thrd_success; 100 1.1.2.2 christos case ETIMEDOUT: 101 1.1.2.2 christos return thrd_timedout; 102 1.1.2.2 christos default: 103 1.1.2.2 christos return thrd_error; 104 1.1.2.2 christos } 105 1.1.2.2 christos } 106 1.1.2.2 christos 107 1.1.2.2 christos int 108 1.1.2.2 christos cnd_wait(cnd_t *cond, mtx_t *mtx) 109 1.1.2.2 christos { 110 1.1.2.2 christos 111 1.1.2.2 christos _DIAGASSERT(cond != NULL); 112 1.1.2.2 christos _DIAGASSERT(mtx != NULL); 113 1.1.2.2 christos 114 1.1.2.2 christos if (pthread_cond_wait(cond, mtx) == 0) 115 1.1.2.2 christos return thrd_success; 116 1.1.2.2 christos 117 1.1.2.2 christos return thrd_error; 118 1.1.2.2 christos } 119
Indexes created Wed Oct 01 18:09:54 GMT 2025