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| author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
| commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
| tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /pthreads/manual/pthread_condattr_setpshared.html | |
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Diffstat (limited to 'pthreads/manual/pthread_condattr_setpshared.html')
| -rw-r--r-- | pthreads/manual/pthread_condattr_setpshared.html | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/pthreads/manual/pthread_condattr_setpshared.html b/pthreads/manual/pthread_condattr_setpshared.html new file mode 100644 index 000000000..eda357e07 --- /dev/null +++ b/pthreads/manual/pthread_condattr_setpshared.html @@ -0,0 +1,153 @@ +<!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_CONDATTR_GETPSHARED"(P) manual page</TITLE> + <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.1.3 (Linux)"> + <META NAME="CREATED" CONTENT="20050504;17542300"> + <META NAME="CHANGED" CONTENT="20050505;18293100"> + <!-- 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_condattr_getpshared, pthread_condattr_setpshared - get and +set the process-shared condition variable attributes +</P> +<H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> +<P><B>#include <pthread.h> </B> +</P> +<P><B>int pthread_condattr_getpshared(const pthread_condattr_t +*restrict</B> <I>attr</I><B>, int *restrict</B> <I>pshared</I><B>); +<BR>int pthread_condattr_setpshared(pthread_condattr_t *</B><I>attr</I><B>, +int</B> <I>pshared</I><B>); </B> +</P> +<H2><A HREF="#toc2" NAME="sect2">Description</A></H2> +<P>The <B>pthread_condattr_getpshared</B> function shall obtain the +value of the <I>process-shared</I> attribute from the attributes +object referenced by <I>attr</I>. The <B>pthread_condattr_setpshared</B> +function shall set the <I>process-shared</I> attribute in an +initialized attributes object referenced by <I>attr</I>. +</P> +<P>The <I>process-shared</I> attribute is set to +<B>PTHREAD_PROCESS_SHARED</B> to permit a condition variable to be +operated upon by any thread that has access to the memory where the +condition variable is allocated, even if the condition variable is +allocated in memory that is shared by multiple processes. If the +<I>process-shared</I> attribute is <B>PTHREAD_PROCESS_PRIVATE</B>, +the condition variable shall only be operated upon by threads created +within the same process as the thread that initialized the condition +variable; if threads of differing processes attempt to operate on +such a condition variable, the behavior is undefined. The default +value of the attribute is <B>PTHREAD_PROCESS_PRIVATE</B>. +</P> +<P><B>Pthreads-w32</B> defines _<B>POSIX_THREAD_PROCESS_SHARED</B> in +pthread.h as -1 to indicate that these routines are implemented but +that the process shared attribute is not supported.</P> +<H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> +<P>If successful, the <B>pthread_condattr_setpshared</B> function +shall return zero; otherwise, an error number shall be returned to +indicate the error. +</P> +<P>If successful, the <B>pthread_condattr_getpshared</B> function +shall return zero and store the value of the <I>process-shared</I> +attribute of <I>attr</I> into the object referenced by the <I>pshared</I> +parameter. 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_condattr_getpshared</B> and +<B>pthread_condattr_setpshared</B> functions 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_condattr_setpshared</B> function may fail if: +</P> +<DL> + <DT><B>EINVAL</B> + </DT><DD STYLE="margin-bottom: 0.5cm"> + The new value specified for the attribute is outside the range of + legal values for that attribute. + </DD><DT> + <B>ENOSYS</B> + </DT><DD STYLE="margin-bottom: 0.5cm"> + The value specified by <I>attr</I> was <B>PTHREAD_PROCESS_SHARED</B> + (Pthreads-w32).</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><B>Pthreads-w32</B> defines <B>_POSIX_THREAD_PROCESS_SHARED</B> in +pthread.h as -1 to indicate that these routines are implemented and +may be used, but do not support the process shared option.</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_create.html"><B>pthread_create</B>(3)</A> <B>,</B> +<A HREF="pthread_cond_init.html"><B>pthread_cond_destroy</B>(3)</A> <B>,</B> +<A HREF="pthread_condattr_init.html"><B>pthread_condattr_destroy</B>(3)</A> +<B>,</B> <A HREF="pthread_mutex_init.html"><B>pthread_mutex_destroy</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> |