Arguments

 

semaphore-id

   OpenVMS usage identifier
   type          longword (unsigned)
   access        read only
   mechanism     by reference
   Identifier of the specified semaphore. The semaphore-id argument
   is the address of an unsigned longword containing the identifier.

   Semaphore-id is returned by PPL$CREATE_SEMAPHORE.
 

semaphore-value

   OpenVMS usage word_signed
   type          word (signed)
   access        write only
   mechanism     by reference
   Receives information about the specified semaphore. The optional
   semaphore-value argument is the address of a signed word
   containing the current value of the semaphore or the number of
   blocked processes. If positive, semaphore-value contains the
   number of available resources associated with this semaphore;
   if negative, it contains the number of waiting processes. If the
   value returned is zero, there are no available resources and no
   waiting processes.
 

semaphore-maximum

   OpenVMS usage word_signed
   type          word (signed)
   access        write only
   mechanism     by reference
   Maximum value of the semaphore. The semaphore-maximum argument is
   the address of a signed word containing the maximum value of the
   semaphore specified by semaphore-id.