pthread_mutex_consistent(3) — Linux manual page

pthread_m...onsistent(3) Library Functions Manualpthread_m...onsistent(3)

NAME         top

       pthread_mutex_consistent - make a robust mutex consistent

LIBRARY         top

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS         top

       #include <pthread.h>

       int pthread_mutex_consistent(pthread_mutex_t *mutex);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       pthread_mutex_consistent():
           _POSIX_C_SOURCE >= 200809L

DESCRIPTION         top

       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 pthread_mutex_lock().

RETURN VALUE         top

       On success, pthread_mutex_consistent() returns 0.  Otherwise, it
       returns a positive error number to indicate the error.

ERRORS         top

       EINVAL The mutex is either not robust or is not in an inconsistent
              state.

STANDARDS         top

       POSIX.1-2008.

HISTORY         top

       glibc 2.12.  POSIX.1-2008.

       Before the addition of pthread_mutex_consistent() to POSIX, glibc
       defined the following equivalent nonstandard function if
       _GNU_SOURCE was defined:

       [[deprecated]]
       int pthread_mutex_consistent_np(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; since
       glibc 2.34 it has been marked as deprecated.

NOTES         top

       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 pthread_mutex_consistent().

EXAMPLES         top

       See pthread_mutexattr_setrobust(3).

SEE ALSO         top

       pthread_mutex_lock(3), pthread_mutexattr_getrobust(3),
       pthread_mutexattr_init(3), pthread_mutexattr_setrobust(3),
       pthreads(7)

COLOPHON         top

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Linux man-pages 6.15            2025-05-17       pthread_m...onsistent(3)

Pages that refer to this page: pthread_mutexattr_setrobust(3)

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