contrib/bind-9.5.2/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
  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 }