VMS Help POSIX Threads, PTHREAD routines, pthread_rwlock_getname_np, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 rwlock

    Address of the read-write lock object whose object name is to be
    obtained.

 name

    Location to store the obtained object name.

 len

    Length in bytes of buffer at the location specified by name.