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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 ManualPTHREAD_...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 2024-06-26 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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