1 /*
2 * Copyright (C) 2004, 2005, 2007 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 if (result != ISC_R_SUCCESS)
47 return (result);
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 #if ISC_MUTEX_PROFILE
57 presult = pthread_cond_timedwait(c, &m->mutex, &ts);
58 #else
59 presult = pthread_cond_timedwait(c, m, &ts);
60 #endif
61 if (presult == 0)
62 return (ISC_R_SUCCESS);
63 if (presult == ETIMEDOUT)
64 return (ISC_R_TIMEDOUT);
65 } while (presult == EINTR);
66
67 isc__strerror(presult, strbuf, sizeof(strbuf));
68 UNEXPECTED_ERROR(__FILE__, __LINE__,
69 "pthread_cond_timedwait() %s %s",
70 isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
71 ISC_MSG_RETURNED, "returned"),
72 strbuf);
73 return (ISC_R_UNEXPECTED);
74 }
75