pthread_mutex_consistent(3) - Linux manual page (original) (raw)

pthreadm...onsistent(3) Library Functions Manual_pthreadm...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, _pthreadmutexconsistent_() 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)](../man3/pthread%5Fmutexattr%5Fsetrobust.3.html).

SEE ALSO top

   [pthread_mutex_lock(3)](../man3/pthread%5Fmutex%5Flock.3.html), [pthread_mutexattr_getrobust(3)](../man3/pthread%5Fmutexattr%5Fgetrobust.3.html),
   [pthread_mutexattr_init(3)](../man3/pthread%5Fmutexattr%5Finit.3.html), [pthread_mutexattr_setrobust(3)](../man3/pthread%5Fmutexattr%5Fsetrobust.3.html),
   [pthreads(7)](../man7/pthreads.7.html)

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Linux man-pages 6.10 2024-07-23 pthreadm...onsistent(3)

Pages that refer to this page:pthread_mutexattr_setrobust(3)