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

    This routine adds a specified interval to the current absolute
    system time and returns a new absolute time. This new absolute
    time may then be used as the expiration time in a call to
    pthread_cond_timedwait().

    The timespec structure contains the following two fields:

    o  tv_sec is an integral number of seconds.

    o  tv_nsec is an integral number of nanoseconds.