/contrib/bind9/lib/isc/pthreads/condition.c

 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
33isc_result_t
34isc_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}