NetBSD/lib/libpthread/pthread_rwlockattr.3
2003-07-04 08:36:06 +00:00

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.\" $NetBSD: pthread_rwlockattr.3,v 1.4 2003/07/04 08:36:06 wiz Exp $
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" Copyright (c) 1998 Alex Nash
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.\" modification, are permitted provided that the following conditions
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.\" $FreeBSD: src/lib/libpthread/man/pthread_rwlockattr_init.3,v 1.7 2002/09/16 19:29:29 mini Exp $
.\"
.Dd January 30, 2003
.Dt PTHREAD_RWLOCKATTR 3
.Os
.Sh NAME
.Nm pthread_rwlockattr_init ,
.Nm pthread_rwlockattr_destroy
.Nd initialize or destroy read/write lock attributes
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_rwlockattr_init "pthread_rwlockattr_t *attr"
.Ft int
.Fn pthread_rwlockattr_destroy "pthread_rwlockattr_t *attr"
.Sh DESCRIPTION
The
.Fn pthread_rwlockattr_init
function is used to initialize a read/write lock attributes object.
.Pp
The
.Fn pthread_rwlockattr_destroy
function is used to destroy a read/write lock attribute object
previously created with
.Fn pthread_rwlockattr_init .
.Sh RETURN VALUES
If successful, the
.Fn pthread_rwlockattr_init
and
.Fn pthread_rwlockattr_destroy
functions return zero. Otherwise an error number will be returned
to indicate the error.
.Sh ERRORS
.Fn pthread_rwlockattr_init
shall fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
Insufficent memory exists to initialize the read/write lock attributes object.
.El
.Pp
.Fn pthread_rwlockattr_init
and
.Fn pthread_rwlockattr_destroy
may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The value specified by
.Fa attr
is invalid.
.El
.Sh SEE ALSO
.Xr pthread_rwlock_init 3
.Sh STANDARDS
The
.Fn pthread_rwlockattr_init
and
.Fn pthread_rwlockattr_destroy
functions conform to
.St -p1003.1-96 .