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<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8">
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<TITLE>PTHREAD_DETACH(3) manual page</TITLE>
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<META NAME="GENERATOR" CONTENT="OpenOffice.org 2.0 (Linux)">
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<META NAME="CREATED" CONTENT="20050504;18010700">
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<META NAME="CHANGEDBY" CONTENT="Ross Johnson">
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<META NAME="CHANGED" CONTENT="20060408;9255600">
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<BODY LANG="en-GB" BGCOLOR="#ffffff" DIR="LTR">
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<H4>POSIX Threads for Windows – REFERENCE - <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A></H4>
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<P><A HREF="index.html">Reference Index</A></P>
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<P><A HREF="#toc">Table of Contents</A></P>
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<H2><A HREF="#toc0" NAME="sect0">Name</A></H2>
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<P>pthread_detach - put a running thread in the detached state
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</P>
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<H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2>
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<P><B>#include <pthread.h></B>
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</P>
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<P><B>int pthread_detach(pthread_t </B><I>th</I><B>);</B>
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</P>
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<H2><A HREF="#toc2" NAME="sect2">Description</A></H2>
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<P><B>pthread_detach</B> puts the thread <I>th</I> in the detached
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state. This guarantees that the resources consumed by <I>th</I> will
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be freed immediately when <I>th</I> terminates. However, this
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prevents other threads from synchronizing on the termination of <I>th</I>
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using <B>pthread_join</B>. If, when <B>pthread_detach</B> is called,
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<I>th</I> has already terminated, all of <I>th</I>'s remaining
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resources will be freed.</P>
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<P>A thread can be created initially in the detached state, using the
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<B>detachstate</B> attribute to <A HREF="pthread_create.html"><B>pthread_create</B>(3)</A>
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. In contrast, <B>pthread_detach</B> applies to threads created in
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the joinable state, and which need to be put in the detached state
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later.
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</P>
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<P>After <B>pthread_detach</B> completes, subsequent attempts to
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perform <B>pthread_join</B> on <I>th</I> will fail. If another thread
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is already joining the thread <I>th</I> at the time <B>pthread_detach</B>
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is called, <I>th</I> will be detached and <B>pthread_join</B> will
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eventually return when <I>th</I> terminates but may not return with
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<I>th</I>'s correct return code.
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</P>
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<H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2>
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<P>On success, 0 is returned. On error, a non-zero error code is
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returned.
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</P>
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<H2><A HREF="#toc4" NAME="sect4">Errors</A></H2>
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<DL>
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<DT><B>ESRCH</B>
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</DT><DD>
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No thread could be found corresponding to that specified by <I>th</I>
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</DD><DT>
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<B>EINVAL</B>
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</DT><DD STYLE="margin-bottom: 0.5cm">
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the thread <I>th</I> is already in the detached state
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</DD></DL>
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<H2>
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<A HREF="#toc5" NAME="sect5">Author</A></H2>
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<P>Xavier Leroy <Xavier.Leroy@inria.fr>
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</P>
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<P>Modified by Ross Johnson for use with Pthreads-w32.</P>
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<H2><A HREF="#toc6" NAME="sect6">See Also</A></H2>
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<P><A HREF="pthread_create.html"><B>pthread_create</B>(3)</A> ,
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<A HREF="pthread_join.html"><B>pthread_join</B>(3)</A> ,
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<A HREF="pthread_attr_init.html"><B>pthread_attr_setdetachstate</B>(3)</A>
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</P>
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<HR>
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<P><A NAME="toc"></A><B>Table of Contents</B></P>
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<UL>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Return
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Value</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect4" NAME="toc4">Errors</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect5" NAME="toc5">Author</A>
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</P>
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<LI><P><A HREF="#sect6" NAME="toc6">See Also</A>
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</P>
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</UL>
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