VMS Help RTL Routines, PPL$, PPL$DECREMENT_SEMAPHORE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Decrement a Semaphore routine waits for a semaphore to have a
    value greater than 0, then decrements the value by 1 to indicate
    the allocation of a resource.

    Format

      PPL$DECREMENT_SEMAPHORE  semaphore-id [,flags] [,spin]

  Additional Information (explode) :

• Arguments