Copyright (c) 1997 Brian Cully <shmit@kublai.com>
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_mutex_trylock.3 172880 2007-10-22 10:08:01Z ru $
.Dd July 30, 1998 .Dt PTHREAD_MUTEX_TRYLOCK 3 .Os .Sh NAME .Nm pthread_mutex_trylock .Nd attempt to lock a mutex without blocking .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n pthread.h .Ft int .Fn pthread_mutex_trylock "pthread_mutex_t *mutex" .Sh DESCRIPTION The .Fn pthread_mutex_trylock function locks .Fa mutex . If the mutex is already locked, .Fn pthread_mutex_trylock will not block waiting for the mutex, but will return an error condition. .Sh RETURN VALUES If successful, .Fn pthread_mutex_trylock will return zero, otherwise an error number will be returned to indicate the error. .Sh ERRORS The .Fn pthread_mutex_trylock function will fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa mutex is invalid. t Bq Er EBUSY .Fa Mutex is already locked. .El .Sh SEE ALSO .Xr pthread_mutex_destroy 3 , .Xr pthread_mutex_init 3 , .Xr pthread_mutex_lock 3 , .Xr pthread_mutex_unlock 3 .Sh STANDARDS The .Fn pthread_mutex_trylock function conforms to .St -p1003.1-96 .
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_mutex_trylock.3 172880 2007-10-22 10:08:01Z ru $
.Dd July 30, 1998 .Dt PTHREAD_MUTEX_TRYLOCK 3 .Os .Sh NAME .Nm pthread_mutex_trylock .Nd attempt to lock a mutex without blocking .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n pthread.h .Ft int .Fn pthread_mutex_trylock "pthread_mutex_t *mutex" .Sh DESCRIPTION The .Fn pthread_mutex_trylock function locks .Fa mutex . If the mutex is already locked, .Fn pthread_mutex_trylock will not block waiting for the mutex, but will return an error condition. .Sh RETURN VALUES If successful, .Fn pthread_mutex_trylock will return zero, otherwise an error number will be returned to indicate the error. .Sh ERRORS The .Fn pthread_mutex_trylock function will fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa mutex is invalid. t Bq Er EBUSY .Fa Mutex is already locked. .El .Sh SEE ALSO .Xr pthread_mutex_destroy 3 , .Xr pthread_mutex_init 3 , .Xr pthread_mutex_lock 3 , .Xr pthread_mutex_unlock 3 .Sh STANDARDS The .Fn pthread_mutex_trylock function conforms to .St -p1003.1-96 .