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