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Annotation of embedaddon/ntp/lib/isc/pthreads/condition.c, revision 1.1.1.1

1.1       misho       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
                     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: }