pthread_mutex_consistent - make a robust mutex consistent
int pthread_mutex_consistent(pthread_mutex_t *mutex);
Compile and link with -pthread.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_POSIX_C_SOURCE >= 200809L
This function makes a robust mutex consistent if it is in an inconsistent 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
On success, pthread_mutex_consistent() returns 0. Otherwise, it returns a
positive error number to indicate the cause of the error.
pthread_mutex_consistent() was added to glibc in version 2.12.
pthread_mutex_consistent() simply informs the implementation that the
state (shared data) guarded by the mutex has been restored to a consistent
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
- The mutex is either not robust or is not in an inconsistent state.
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.
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