diff options
author | alex <alex@FreeBSD.org> | 1998-09-07 19:01:43 +0000 |
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committer | alex <alex@FreeBSD.org> | 1998-09-07 19:01:43 +0000 |
commit | fe02148d3f8adf07ccb0cd4f4491ed4eadc9a710 (patch) | |
tree | be26836ebbbdc58cff84aa54c1c720ab317da73d /share/man/man3/pthread_rwlock_unlock.3 | |
parent | 06f84d5212709c1fffd29e99fe45de2c81683197 (diff) | |
download | FreeBSD-src-fe02148d3f8adf07ccb0cd4f4491ed4eadc9a710.zip FreeBSD-src-fe02148d3f8adf07ccb0cd4f4491ed4eadc9a710.tar.gz |
Implement pthread read/write locks as defined by Version 2 of the Single
UNIX Specification.
As with our standard mutexes, process shared locks are not supported at
this time.
Diffstat (limited to 'share/man/man3/pthread_rwlock_unlock.3')
-rw-r--r-- | share/man/man3/pthread_rwlock_unlock.3 | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/share/man/man3/pthread_rwlock_unlock.3 b/share/man/man3/pthread_rwlock_unlock.3 new file mode 100644 index 0000000..1c9fd05 --- /dev/null +++ b/share/man/man3/pthread_rwlock_unlock.3 @@ -0,0 +1,79 @@ +.\" Copyright (c) 1998 Alex Nash +.\" 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. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. +.\" +.\" $Id$ +.\" +.Dd August 4, 1998 +.Dt PTHREAD_RWLOCK_UNLOCK 3 +.Os +.Sh NAME +.Nm pthread_rwlock_unlock +.Nd release a read/write lock +.Sh SYNOPSIS +.Fd #include <pthread.h> +.Ft int +.Fn pthread_rwlock_unlock "pthread_rwlock_t *lock" +.Sh DESCRIPTION +The +.Fn pthread_rwlock_unlock +function is used to release the read/write lock previously obtained by +.Fn pthread_rwlock_rdlock , +.Fn pthread_rwlock_wrlock , +.Fn pthread_rwlock_tryrdlock , +or +.Fn pthread_rwlock_trywrlock . +.Sh RETURN VALUES +If successful, the +.Fn pthread_rwlock_unlock +function will return zero. Otherwise an error number will be returned +to indicate the error. +.Pp +The results are undefined if +.Fa lock +is not held by the calling thread. +.Sh SEE ALSO +.Xr pthread_rwlock_rdlock 3 , +.Xr pthread_rwlock_wrlock 3 +.Sh STANDARDS +The +.Fn pthread_rwlock_unlock +function is expected to conform to +.St -susv2 . +.Sh ERRORS +The +.Fn pthread_rwlock_unlock +function may fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +The value specified by +.Fa lock +is invalid. +.It Bq Er EPERM +The current thread does not own the read/write lock. +.El +.Sh HISTORY +The +.Fn pthread_rwlock_unlock +function first appeared in +.Fx 3.0 . |