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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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PTHREAD_...NSISTENT(3P) POSIX Programmer's Manual PTHREAD_...NSISTENT(3P)
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.
pthread_mutex_consistent — mark state protected by robust mutex as
consistent
#include <pthread.h>
int pthread_mutex_consistent(pthread_mutex_t *mutex);
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.
Upon successful completion, the pthread_mutex_consistent()
function shall return zero. Otherwise, an error value shall be
returned to indicate the error.
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.
None.
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].
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.
None.
pthread_mutex_lock(3p), pthread_mutexattr_getrobust(3p)
The Base Definitions volume of POSIX.1‐2017, pthread.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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
http://www.opengroup.org/unix/online.html .
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
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 PTHREAD_...NSISTENT(3P)
Pages that refer to this page: pthread.h(0p), pthread_mutexattr_getrobust(3p), pthread_mutex_lock(3p)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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