pthread_mutex_consistent(3p) — Linux manual page



PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       pthread_mutex_consistent — mark state protected by robust mutex as

SYNOPSIS         top

       #include <pthread.h>

       int pthread_mutex_consistent(pthread_mutex_t *mutex);

DESCRIPTION         top

       If mutex is a robust mutex in an inconsistent state, the
       pthread_mutex_consistent() function can be used to mark the state
       protected by the mutex referenced by mutex as consistent again.

       If an owner of a robust mutex terminates while holding the mutex, the
       mutex becomes inconsistent and the next thread that acquires the
       mutex lock shall be notified of the state by the return value
       [EOWNERDEAD].  In this case, the mutex does not become normally
       usable again until the state is marked consistent.

       If the thread which acquired the mutex lock with the return value
       [EOWNERDEAD] terminates before calling either
       pthread_mutex_consistent() or pthread_mutex_unlock(), the next thread
       that acquires the mutex lock shall be notified about the state of the
       mutex by the return value [EOWNERDEAD].

       The behavior is undefined if the value specified by the mutex
       argument to pthread_mutex_consistent() does not refer to an
       initialized mutex.

RETURN VALUE         top

       Upon successful completion, the pthread_mutex_consistent() function
       shall return zero. Otherwise, an error value shall be returned to
       indicate the error.

ERRORS         top

       The pthread_mutex_consistent() function shall fail if:

       EINVAL The mutex object referenced by mutex is not robust or does not
              protect an inconsistent state.

       These functions shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES         top



       The pthread_mutex_consistent() function is only responsible for
       notifying the implementation that the state protected by the mutex
       has been recovered and that normal operations with the mutex can be
       resumed. It is the responsibility of the application to recover the
       state so it can be reused. If the application is not able to perform
       the recovery, it can notify the implementation that the situation is
       unrecoverable by a call to pthread_mutex_unlock() without a prior
       call to pthread_mutex_consistent(), in which case subsequent threads
       that attempt to lock the mutex will fail to acquire the lock and be
       returned [ENOTRECOVERABLE].

RATIONALE         top

       If an implementation detects that the value specified by the mutex
       argument to pthread_mutex_consistent() does not refer to an
       initialized mutex, it is recommended that the function should fail
       and report an [EINVAL] error.



SEE ALSO         top

       pthread_mutex_lock(3p), pthread_mutexattr_getrobust(3p)

       The Base Definitions volume of POSIX.1‐2008, pthread.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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 .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see .

IEEE/The Open Group                 2013        PTHREAD_MUTEX_CONSISTENT(3P)

Pages that refer to this page: pthread.h(0p)pthread_mutexattr_getrobust(3p)pthread_mutex_lock(3p)pthread_mutex_unlock(3p)