NetBSD-5.0.2/lib/libpthread/pthread_mutex_unlock.3

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.\" $NetBSD: pthread_mutex_unlock.3,v 1.3 2008/05/04 19:43:05 martin Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" Copyright (c) 1997 Brian Cully <shmit@kublai.com>
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.\" modification, are permitted provided that the following conditions
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.\" $FreeBSD: src/lib/libpthread/man/pthread_mutex_unlock.3,v 1.12 2002/09/16 19:29:29 mini Exp $
.\"
.Dd January 30, 2003
.Dt PTHREAD_MUTEX_UNLOCK 3
.Os
.Sh NAME
.Nm pthread_mutex_unlock
.Nd unlock a mutex
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_mutex_unlock "pthread_mutex_t *mutex"
.Sh DESCRIPTION
If the current thread holds the lock on
.Fa mutex ,
then the
.Fn pthread_mutex_unlock
function unlocks
.Fa mutex .
.Sh RETURN VALUES
If successful,
.Fn pthread_mutex_unlock
will return zero, otherwise an error number will be returned to
indicate the error.
.Sh ERRORS
.Fn pthread_mutex_unlock
may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The value specified by
.Fa mutex
is invalid.
.It Bq Er EPERM
The current thread does not hold a lock on
.Fa mutex .
.El
.Sh SEE ALSO
.Xr pthread_mutex_destroy 3 ,
.Xr pthread_mutex_init 3 ,
.Xr pthread_mutex_lock 3 ,
.Xr pthread_mutex_trylock 3
.Sh STANDARDS
.Fn pthread_mutex_unlock
conforms to
.St -p1003.1-96 .