PTHREAD_MUTEX_CONSISTENT(3)Linux Programmer's ManuaPTHREAD_MUTEX_CONSISTENT(3)NAME
pthread_mutex_consistent - make a robust mutex consistent
SYNOPSIS
#include <pthread.h>
int pthread_mutex_consistent(pthread_mutex_t *mutex);
Compile and link with -pthread.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
pthread_mutex_consistent():
_POSIX_C_SOURCE >= 200809L
DESCRIPTION
This function makes a robust mutex consistent if it is in an inconsis‐
tent state. A mutex can be left in an inconsistent state if its owner
terminates while holding the mutex, in which case the next owner who
acquires the mutex will succeed and be notified by a return value of
EOWNERDEAD from a call to pthread_mutex_lock().
RETURN VALUE
On success, pthread_mutex_consistent() returns 0. Otherwise, it
returns a positive error number to indicate the cause of the error.
ERRORS
EINVAL The mutex is either not robust or is not in an inconsistent
state.
VERSIONSpthread_mutex_consistent() was added to glibc in version 2.12.
CONFORMING TO
POSIX.1-2008.
NOTESpthread_mutex_consistent() simply informs the implementation that the
state (shared data) guarded by the mutex has been restored to a consis‐
tent state and that normal operations can now be performed with the
mutex. It is the application's responsibility to ensure that the
shared data has been restored to a consistent state before calling
pthread_mutex_consistent().
Before the addition of pthread_mutex_consistent() to POSIX, glibc
defined the following equivalent nonstandard function if _GNU_SOURCE
was defined:
int pthread_mutex_consistent(const pthread_mutex_t *mutex);
This GNU-specific API, which first appeared in glibc 2.4, is nowadays
obsolete and should not be used in new programs.
EXAMPLE
See pthread_mutexattr_setrobust(3).
SEE ALSOpthread_mutexattr_init(3), pthread_mutex_lock(3),
pthread_mutexattr_setrobust(3), pthread_mutexattr_getrobust(3),
pthreads(7)COLOPHON
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Linux 2017-08-20 PTHREAD_MUTEX_CONSISTENT(3)
