1/*	$NetBSD: condition.c,v 1.2.6.2 2012/12/15 05:40:09 riz 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
35isc_result_t
36isc_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