VMS Help DCE_THREADS, Thread Intro, Mutex Routines  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   pthread_mutex_destroy     Destroys a mutex.

   pthread_mutex_init        Initializes a mutex with attributes
                             specified by the attributes argument.

   pthread_mutex_lock        Locks an unlocked mutex; if locked, the
                             caller waits for the mutex to become
                             available.

   pthread_mutex_trylock     Attempts to lock a mutex; returns
                             immediately if mutex is already locked.

   pthread_mutex_unlock      Unlocks a locked mutex.