'\" tr.\" -*- nroff -*-.\".\" @(#) WR.9,v 1.1.4.1 2004/01/12 23:32:57 brian Exp.\".\" =========================================================================.\".\" Copyright (C) 2001-2004  OpenSS7 Corp. <www.openss7.com>.\".\" All Rights Reserved..\".\" Permission is granted to make and distribute verbatim copies of this.\" manual provided the copyright notice and this permission notice are.\" preserved on all copies..\".\" Permission is granted to copy and distribute modified versions of this.\" manual under the conditions for verbatim copying, provided that the.\" entire resulting derived work is distributed under the terms of a.\" permission notice identical to this one.\" .\" Since the Linux kernel and libraries are constantly changing, this.\" manual page may be incorrect or out-of-date.  The author(s) assume no.\" responsibility for errors or omissions, or for damages resulting from.\" the use of the information contained herein.  The author(s) may not.\" have taken the same level of care in the production of this manual,.\" which is licensed free of charge, as they might when working.\" professionally..\" .\" Formatted or processed versions of this manual, if unaccompanied by.\" the source, must acknowledge the copyright and authors of this work..\".\" =========================================================================.\".\" Modified 2004/01/12 23:32:57 by brian.\".\" =========================================================================.so lis.macros.R1bracket-label "\fR[\fB" "\fR]" "\fR, \fB"no-default-databasedatabase lis.refsaccumulatemove-punctuationabbreviate Ajoin-authors ", " ", " " and "et-al " et al" 2 3abbreviate-label-ranges ".."sort-adjacent-labels.R2.\".\".TH WR 9 "2004/01/12 23:32:57" "LiS-2_16_18-8" "Linux STREAMS DDI/DKI".SH NAME.B WR\- return the write queue of a \fISTREAMS\fR queue pair.SH SYNOPSIS.PP.B #include <sys/stream.h>.HP 8.BI "queue_t *" wq " = WR(" q );.SH DESCRIPTION.PP.BR WR ()returns the write queue associated with the queue pair indicated by the queuepointer.IR q ,regardless of whether.I qpoints to the write queue or the write queue of the queue pair..PP.BR WR ()is typically and often used to find the write queue from a pointer to one ofthe queues in a queue pair..SH "RETURN VALUES".PPUpon success,.BR WR ()returns a pointer to the write queue of the queue pair referenced by.IR q ..PPUpon failure,.BR WR ()returns.BR NULL ..SH ERRORS.PPWhen.BR WR ()fails, it returns.BR NULL ..BR WR ()fails when the queue pointer.I qis.BR NULL ;.I qdoes not point to a valid queue structure;.I q->q_otheris.BR NULL ;.I q->q_otherdoes not point to a valid queue structure..SH CAVEATS.PP.B LiS.[LiS.]implements.BR WR ()as a function rather than as the more obviousmacro:.sp.nf#define WR(__q) __q->q_flags & QREADR ? __q->q_other : __q.fi.PPThe.B LiS.[LiS.]function call is inefficient, particularly as this function is called oftenand regularly..SH "SEE ALSO".PP.BR WR (9),.BR OTHERQ (9),.BR SAMESTR (9)..SH VERSIONS.PPThis manpage was written for.B LiS\c..[LiS.].\".\".XX.[magic.].[svr42.].[svr4.].\".\".[$LIST$.].TA