| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> | |
| <HTML> | |
| <HEAD> | |
| <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8"> | |
| <TITLE>"PTHREAD_RWLOCKATTR_DESTROY"(P) manual page</TITLE> | |
| <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.1.3 (Linux)"> | |
| <META NAME="CREATED" CONTENT="20050505;504000"> | |
| <META NAME="CHANGED" CONTENT="20050505;18474200"> | |
| <!-- manual page source format generated by PolyglotMan v3.2, --> | |
| <!-- available at http://polyglotman.sourceforge.net/ --> | |
| </HEAD> | |
| <BODY LANG="en-GB" BGCOLOR="#ffffff" DIR="LTR"> | |
| <H4>POSIX Threads for Windows – REFERENCE - <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A></H4> | |
| <P><A HREF="index.html">Reference Index</A></P> | |
| <P><A HREF="#toc">Table of Contents</A></P> | |
| <H2><A HREF="#toc0" NAME="sect0">Name</A></H2> | |
| <P>pthread_rwlockattr_destroy, pthread_rwlockattr_init - destroy and | |
| initialize the read-write lock attributes object | |
| </P> | |
| <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> | |
| <P><B>#include <pthread.h> </B> | |
| </P> | |
| <P><B>int pthread_rwlockattr_destroy(pthread_rwlockattr_t <I>*</I></B><I>attr</I><B>); | |
| <BR>int pthread_rwlockattr_init(pthread_rwlockattr_t <I>*</I></B><I>attr</I><B>); | |
| </B> | |
| </P> | |
| <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> | |
| <P>The <B>pthread_rwlockattr_destroy</B> function shall destroy a | |
| read-write lock attributes object. A destroyed <I>attr</I> attributes | |
| object can be reinitialized using <B>pthread_rwlockattr_init</B> ; | |
| the results of otherwise referencing the object after it has been | |
| destroyed are undefined. An implementation may cause | |
| <B>pthread_rwlockattr_destroy</B> to set the object referenced by | |
| <I>attr</I> to an invalid value. | |
| </P> | |
| <P>The <B>pthread_rwlockattr_init</B> function shall initialize a | |
| read-write lock attributes object <I>attr</I> with the default value | |
| for all of the attributes defined by the implementation. | |
| </P> | |
| <P>Results are undefined if <B>pthread_rwlockattr_init</B> is called | |
| specifying an already initialized <I>attr</I> attributes object. | |
| </P> | |
| <P>After a read-write lock attributes object has been used to | |
| initialize one or more read-write locks, any function affecting the | |
| attributes object (including destruction) shall not affect any | |
| previously initialized read-write locks. | |
| </P> | |
| <P><B>Pthreads-w32</B> defines <B>_POSIX_READER_WRITER_LOCKS</B> in | |
| pthread.h as 200112L to indicate that the reader/writer routines are | |
| implemented and may be used.</P> | |
| <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> | |
| <P>If successful, the <B>pthread_rwlockattr_destroy</B> and | |
| <B>pthread_rwlockattr_init</B> functions shall return zero; | |
| otherwise, an error number shall be returned to indicate the error. | |
| </P> | |
| <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> | |
| <P>The <B>pthread_rwlockattr_destroy</B> function may fail if: | |
| </P> | |
| <DL> | |
| <DT><B>EINVAL</B> | |
| </DT><DD STYLE="margin-bottom: 0.5cm"> | |
| The value specified by <I>attr</I> is invalid. | |
| </DD></DL> | |
| <P> | |
| The <B>pthread_rwlockattr_init</B> function shall fail if: | |
| </P> | |
| <DL> | |
| <DT><B>ENOMEM</B> | |
| </DT><DD STYLE="margin-bottom: 0.5cm"> | |
| Insufficient memory exists to initialize the read-write lock | |
| attributes object. | |
| </DD></DL> | |
| <P> | |
| These functions shall not return an error code of [EINTR]. | |
| </P> | |
| <P><I>The following sections are informative.</I> | |
| </P> | |
| <H2><A HREF="#toc5" NAME="sect5">Examples</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc6" NAME="sect6">Application Usage</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc7" NAME="sect7">Rationale</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc8" NAME="sect8">Future Directions</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc9" NAME="sect9">See Also</A></H2> | |
| <P><A HREF="pthread_rwlock_init.html"><B>pthread_rwlock_destroy</B>(3)</A> | |
| <B>,</B> <A HREF="pthread_rwlockattr_setpshared.html"><B>pthread_rwlockattr_getpshared</B>(3)</A> | |
| <B>,</B> <A HREF="pthread_rwlockattr_setpshared.html"><B>pthread_rwlockattr_setpshared</B>(3)</A> | |
| <B>,</B> the Base Definitions volume of IEEE Std 1003.1-2001, | |
| <I><pthread.h></I> | |
| </P> | |
| <H2><A HREF="#toc10" NAME="sect10">Copyright</A></H2> | |
| <P>Portions of this text are reprinted and reproduced in electronic | |
| form from IEEE Std 1003.1, 2003 Edition, Standard for Information | |
| Technology -- Portable Operating System Interface (POSIX), The Open | |
| Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the | |
| Institute of Electrical and Electronics Engineers, Inc and The Open | |
| Group. In the event of any discrepancy between this version and the | |
| original IEEE and The Open Group Standard, the original IEEE and The | |
| Open Group Standard is the referee document. The original Standard | |
| can be obtained online at <A HREF="http://www.opengroup.org/unix/online.html">http://www.opengroup.org/unix/online.html</A> | |
| . | |
| </P> | |
| <P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A>.</P> | |
| <HR> | |
| <P><A NAME="toc"></A><B>Table of Contents</B></P> | |
| <UL> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Return | |
| Value</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect4" NAME="toc4">Errors</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect5" NAME="toc5">Examples</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect6" NAME="toc6">Application | |
| Usage</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect7" NAME="toc7">Rationale</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect8" NAME="toc8">Future | |
| Directions</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect9" NAME="toc9">See | |
| Also</A> | |
| </P> | |
| <LI><P><A HREF="#sect10" NAME="toc10">Copyright</A> | |
| </P> | |
| </UL> | |
| </BODY> | |
| </HTML> |