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
isc_condition_waituntil(isc_condition_t * c,isc_mutex_t * m,isc_time_t * 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