174 lines
4.3 KiB
HTML
174 lines
4.3 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_MUTEX_CONSISTENT</TITLE>
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</HEAD><BODY>
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<H1>PTHREAD_MUTEX_CONSISTENT</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2019-10-10<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_mutex_consistent - make a robust mutex consistent
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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>int pthread_mutex_consistent(pthread_mutex_t *</B><I>mutex</I><B>);</B>
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</PRE>
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<P>
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Compile and link with <I>-pthread</I>.
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<P>
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Feature Test Macro Requirements for glibc (see
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<B><A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A></B>(7)):
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<P>
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<B>pthread_mutex_consistent</B>():
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<BR>
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<DL COMPACT><DT id="1"><DD>
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_POSIX_C_SOURCE >= 200809L
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</DL>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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This function makes a robust mutex consistent if it is in an inconsistent
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state.
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A mutex can be left in an inconsistent state if its owner terminates
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while holding the mutex, in which case the next owner who acquires the
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mutex will succeed and be notified by a return value of
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<B>EOWNERDEAD</B>
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from a call to
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<B>pthread_mutex_lock</B>().
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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On success,
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<I>pthread_mutex_consistent</I>()
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returns 0.
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Otherwise,
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it returns a positive error number to indicate the cause of the error.
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<A NAME="lbAF"> </A>
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<H2>ERRORS</H2>
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<DL COMPACT>
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<DT id="2"><B>EINVAL</B>
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<DD>
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The mutex is either not robust or is not in an inconsistent state.
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</DL>
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<A NAME="lbAG"> </A>
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<H2>VERSIONS</H2>
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<B>pthread_mutex_consistent</B>()
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was added to glibc in version 2.12.
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<A NAME="lbAH"> </A>
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<H2>CONFORMING TO</H2>
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POSIX.1-2008.
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<A NAME="lbAI"> </A>
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<H2>NOTES</H2>
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<B>pthread_mutex_consistent</B>()
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simply informs the implementation that the state (shared data)
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guarded by the mutex has been restored to a consistent state and that
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normal operations can now be performed with the mutex.
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It is the application's responsibility to ensure that the
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shared data has been restored to a consistent state before calling
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<B>pthread_mutex_consistent</B>().
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<P>
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Before the addition of
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<B>pthread_mutex_consistent</B>()
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to POSIX,
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glibc defined the following equivalent nonstandard function if
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<B>_GNU_SOURCE</B>
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was defined:
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<P>
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<PRE>
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<B>int pthread_mutex_consistent(const pthread_mutex_t *</B><I>mutex</I><B>);</B>
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</PRE>
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<P>
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This GNU-specific API, which first appeared in glibc 2.4,
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is nowadays obsolete and should not be used in new programs.
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<A NAME="lbAJ"> </A>
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<H2>EXAMPLE</H2>
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See
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_mutexattr_setrobust">pthread_mutexattr_setrobust</A></B>(3).
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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_mutexattr_init">pthread_mutexattr_init</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_mutex_lock">pthread_mutex_lock</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_mutexattr_getrobust">pthread_mutexattr_getrobust</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+pthread_mutexattr_setrobust">pthread_mutexattr_setrobust</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="3"><A HREF="#lbAB">NAME</A><DD>
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<DT id="4"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="5"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="6"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="7"><A HREF="#lbAF">ERRORS</A><DD>
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<DT id="8"><A HREF="#lbAG">VERSIONS</A><DD>
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<DT id="9"><A HREF="#lbAH">CONFORMING TO</A><DD>
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<DT id="10"><A HREF="#lbAI">NOTES</A><DD>
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<DT id="11"><A HREF="#lbAJ">EXAMPLE</A><DD>
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<DT id="12"><A HREF="#lbAK">SEE ALSO</A><DD>
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<DT id="13"><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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