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

   pthread_mutexattr_init    Initializes a mutex attributes object.

   pthread_mutexattr_destroy
                             Destroys a mutex attributes object.

   pthread_mutexattr_gettype
                             Obtains the mutex type attribute of a
                             mutex attributes object.

   pthread_mutexattr_settype
                             Changes the mutex type attribute of a
                             mutex attributes object.