All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the author nor the names of any co-contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
$FreeBSD: releng/10.2/share/man/man3/pthread_cond_timedwait.3 233648 2012-03-29 05:02:12Z eadler $
.Dd May 9, 2010 .Dt PTHREAD_COND_TIMEDWAIT 3 .Os .Sh NAME .Nm pthread_cond_timedwait .Nd "wait on a condition variable for a specific amount of time" .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n pthread.h .Ft int .Fn pthread_cond_timedwait "pthread_cond_t *cond" "pthread_mutex_t *mutex" "const struct timespec *abstime" .Sh DESCRIPTION The .Fn pthread_cond_timedwait function atomically blocks the current thread waiting on the condition variable specified by .Fa cond , and releases the mutex specified by .Fa mutex . The waiting thread unblocks only after another thread calls .Xr pthread_cond_signal 3 , or .Xr pthread_cond_broadcast 3 with the same condition variable, or if the system time reaches the time specified in .Fa abstime , and the current thread reacquires the lock on .Fa mutex .
p The clock used to measure .Fa abstime can be specified during creation of the condition variable using .Xr pthread_condattr_setclock 3 . .Sh RETURN VALUES If successful, the .Fn pthread_cond_timedwait function will return zero. Otherwise an error number will be returned to indicate the error. .Sh ERRORS The .Fn pthread_cond_timedwait function will fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa cond , .Fa mutex or .Fa abstime is invalid. t Bq Er ETIMEDOUT The system time has reached or exceeded the time specified in .Fa abstime . t Bq Er EPERM The specified .Fa mutex was not locked by the calling thread. .El .Sh SEE ALSO .Xr pthread_cond_broadcast 3 , .Xr pthread_cond_destroy 3 , .Xr pthread_cond_init 3 , .Xr pthread_cond_signal 3 , .Xr pthread_cond_wait 3 , .Xr pthread_condattr_setclock 3 .Sh STANDARDS The .Fn pthread_cond_timedwait function conforms to .St -p1003.1-96 .