181 lines
4.8 KiB
HTML
181 lines
4.8 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of PTHREAD_EXIT</TITLE>
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</HEAD><BODY>
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<H1>PTHREAD_EXIT</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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pthread_exit - terminate calling thread
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/pthread.h">pthread.h</A>></B>
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<B>void pthread_exit(void *</B><I>retval</I><B>);</B>
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Compile and link with <I>-pthread</I>.
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</PRE>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>pthread_exit</B>()
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function terminates the calling thread and returns a value via
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<I>retval</I>
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that (if the thread is joinable)
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is available to another thread in the same process that calls
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_join">pthread_join</A></B>(3).
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<P>
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Any clean-up handlers established by
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_cleanup_push">pthread_cleanup_push</A></B>(3)
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that have not yet been popped,
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are popped (in the reverse of the order in which they were pushed)
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and executed.
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If the thread has any thread-specific data, then,
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after the clean-up handlers have been executed,
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the corresponding destructor functions are called,
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in an unspecified order.
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<P>
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When a thread terminates,
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process-shared resources (e.g., mutexes, condition variables,
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semaphores, and file descriptors) are not released,
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and functions registered using
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<B><A HREF="/cgi-bin/man/man2html?3+atexit">atexit</A></B>(3)
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are not called.
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<P>
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After the last thread in a process terminates,
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the process terminates as by calling
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<B><A HREF="/cgi-bin/man/man2html?3+exit">exit</A></B>(3)
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with an exit status of zero;
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thus, process-shared resources
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are released and functions registered using
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<B><A HREF="/cgi-bin/man/man2html?3+atexit">atexit</A></B>(3)
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are called.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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This function does not return to the caller.
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<A NAME="lbAF"> </A>
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<H2>ERRORS</H2>
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This function always succeeds.
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<A NAME="lbAG"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>pthread_exit</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe<BR></TD></TR>
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</TABLE>
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<A NAME="lbAH"> </A>
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<H2>CONFORMING TO</H2>
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POSIX.1-2001, POSIX.1-2008.
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<A NAME="lbAI"> </A>
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<H2>NOTES</H2>
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Performing a return from the start function of any thread other
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than the main thread results in an implicit call to
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<B>pthread_exit</B>(),
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using the function's return value as the thread's exit status.
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<P>
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To allow other threads to continue execution,
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the main thread should terminate by calling
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<B>pthread_exit</B>()
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rather than
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<B><A HREF="/cgi-bin/man/man2html?3+exit">exit</A></B>(3).
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<P>
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The value pointed to by
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<I>retval</I>
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should not be located on the calling thread's stack,
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since the contents of that stack are undefined after the thread terminates.
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<A NAME="lbAJ"> </A>
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<H2>BUGS</H2>
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Currently,
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there are limitations in the kernel implementation logic for
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<B><A HREF="/cgi-bin/man/man2html?2+wait">wait</A></B>(2)ing
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on a stopped thread group with a dead thread group leader.
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This can manifest in problems such as a locked terminal if a stop signal is
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sent to a foreground process whose thread group leader has already called
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<B>pthread_exit</B>().
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<A NAME="lbAK"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_create">pthread_create</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_join">pthread_join</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?7+pthreads">pthreads</A></B>(7)
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<A NAME="lbAL"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="5"><A HREF="#lbAF">ERRORS</A><DD>
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<DT id="6"><A HREF="#lbAG">ATTRIBUTES</A><DD>
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<DT id="7"><A HREF="#lbAH">CONFORMING TO</A><DD>
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<DT id="8"><A HREF="#lbAI">NOTES</A><DD>
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<DT id="9"><A HREF="#lbAJ">BUGS</A><DD>
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<DT id="10"><A HREF="#lbAK">SEE ALSO</A><DD>
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<DT id="11"><A HREF="#lbAL">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:53 GMT, March 31, 2021
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</BODY>
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</HTML>
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