Section: POSIX Programmer's Manual (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.
mark state protected by robust mutex as consistent
int pthread_mutex_consistent(pthread_mutex_t *mutex);
is a robust mutex in an inconsistent state, the
function can be used to mark the state protected by the 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
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
terminates before calling either
the next thread that acquires the mutex lock shall be notified about
the state of the mutex by the return value
The behavior is undefined if the value specified by the
does not refer to an initialized mutex.
Upon successful completion, the
function shall return zero. Otherwise, an error value shall be returned
to indicate the error.
function shall fail if:
The mutex object referenced by
is not robust or does not protect an inconsistent state.
These functions shall not return an error code of
The following sections are informative.
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
without a prior call to
in which case subsequent threads that attempt to lock the mutex will
fail to acquire the lock and be returned
If an implementation detects that the value specified by the
does not refer to an initialized mutex, it is recommended that the
function should fail and report an
The Base Definitions volume of POSIX.1-2008,
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
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