Copyright (c) 1998 Alex Nash
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modification, are permitted provided that the following conditions
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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$FreeBSD$
.Dd August 4, 1998 .Dt PTHREAD_RWLOCK_UNLOCK 3 .Os .Sh NAME .Nm pthread_rwlock_unlock .Nd release a read/write lock .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n 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.
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.
$FreeBSD$
.Dd August 4, 1998 .Dt PTHREAD_RWLOCK_UNLOCK 3 .Os .Sh NAME .Nm pthread_rwlock_unlock .Nd release a read/write lock .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n 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.
p The results are undefined if .Fa lock is not held by the calling thread. .Sh ERRORS The .Fn pthread_rwlock_unlock function may fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa lock is invalid. t Bq Er EPERM The current thread does not own the read/write lock. .El .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 HISTORY The .Fn pthread_rwlock_unlock function first appeared in .Fx 3.0 .