1 /* $NetBSD: condition.c,v 1.3 2025/01/26 16:25:36 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 /*! \file */ 17 18 #include <errno.h> 19 20 #include <isc/condition.h> 21 #include <isc/strerr.h> 22 #include <isc/string.h> 23 #include <isc/time.h> 24 #include <isc/util.h> 25 26 isc_result_t 27 isc__condition_waituntil(pthread_cond_t *c, pthread_mutex_t *m, isc_time_t *t) { 28 int presult; 29 isc_result_t result; 30 struct timespec ts; 31 32 REQUIRE(c != NULL && m != NULL && t != NULL); 33 34 /* 35 * POSIX defines a timespec's tv_sec as time_t. 36 */ 37 result = isc_time_secondsastimet(t, &ts.tv_sec); 38 39 /* 40 * If we have a range error ts.tv_sec is most probably a signed 41 * 32 bit value. Set ts.tv_sec to INT_MAX. This is a kludge. 42 */ 43 if (result == ISC_R_RANGE) { 44 ts.tv_sec = INT_MAX; 45 } else if (result != ISC_R_SUCCESS) { 46 return result; 47 } 48 49 /*! 50 * POSIX defines a timespec's tv_nsec as long. isc_time_nanoseconds 51 * ensures its return value is < 1 billion, which will fit in a long. 52 */ 53 ts.tv_nsec = (long)isc_time_nanoseconds(t); 54 55 do { 56 presult = pthread_cond_timedwait(c, m, &ts); 57 if (presult == 0) { 58 return ISC_R_SUCCESS; 59 } 60 if (presult == ETIMEDOUT) { 61 return ISC_R_TIMEDOUT; 62 } 63 } while (presult == EINTR); 64 65 UNEXPECTED_SYSERROR(presult, "pthread_cond_timedwait()"); 66 return ISC_R_UNEXPECTED; 67 } 68