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

    This routine changes the object name in the condition variable
    object specified by the cond argument to the value specified
    by the name argument. To set a new condition variable object's
    object name, call this routine immediately after initializing the
    condition variable object.

    The object name is a C language string and provides an identifier
    that is meaningful to a person debugging a multithreaded
    application. The maximum number of characters in the object name
    is 31.