1 /* $NetBSD: condition.c,v 1.5 2014/12/10 04:38:00 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007, 2012 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 1998-2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: condition.c,v 1.36 2007/06/19 23:47:18 tbox Exp */ 21 22 /*! \file */ 23 24 #include <config.h> 25 26 #include <errno.h> 27 28 #include <isc/condition.h> 29 #include <isc/msgs.h> 30 #include <isc/strerror.h> 31 #include <isc/string.h> 32 #include <isc/time.h> 33 #include <isc/util.h> 34 35 isc_result_t 36 isc_condition_waituntil(isc_condition_t *c, isc_mutex_t *m, isc_time_t *t) { 37 int presult; 38 isc_result_t result; 39 struct timespec ts; 40 char strbuf[ISC_STRERRORSIZE]; 41 42 REQUIRE(c != NULL && m != NULL && t != NULL); 43 44 /* 45 * POSIX defines a timespec's tv_sec as time_t. 46 */ 47 result = isc_time_secondsastimet(t, &ts.tv_sec); 48 49 /* 50 * If we have a range error ts.tv_sec is most probably a signed 51 * 32 bit value. Set ts.tv_sec to INT_MAX. This is a kludge. 52 */ 53 if (result == ISC_R_RANGE) 54 ts.tv_sec = INT_MAX; 55 else if (result != ISC_R_SUCCESS) 56 return (result); 57 58 /*! 59 * POSIX defines a timespec's tv_nsec as long. isc_time_nanoseconds 60 * ensures its return value is < 1 billion, which will fit in a long. 61 */ 62 ts.tv_nsec = (long)isc_time_nanoseconds(t); 63 64 do { 65 #if ISC_MUTEX_PROFILE 66 presult = pthread_cond_timedwait(c, &m->mutex, &ts); 67 #else 68 presult = pthread_cond_timedwait(c, m, &ts); 69 #endif 70 if (presult == 0) 71 return (ISC_R_SUCCESS); 72 if (presult == ETIMEDOUT) 73 return (ISC_R_TIMEDOUT); 74 } while (presult == EINTR); 75 76 isc__strerror(presult, strbuf, sizeof(strbuf)); 77 UNEXPECTED_ERROR(__FILE__, __LINE__, 78 "pthread_cond_timedwait() %s %s", 79 isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, 80 ISC_MSG_RETURNED, "returned"), 81 strbuf); 82 return (ISC_R_UNEXPECTED); 83 } 84