Arguments

 

semaphore-id

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

   Semaphore-id is returned by PPL$CREATE_SEMAPHORE.
 

flags

   OpenVMS usage mask_longword
   type          longword (unsigned)
   access        read only
   mechanism     by reference
   Bit mask specifying options for decrementing the semaphore. The
   flags argument is a longword bit mask containing the flag. The
   valid values for flags are as follows:

   PPL$M_NON_         Indicates that the caller is not to block if
   BLOCKING           the resource is not available. The default is
                      FALSE: the caller will block if resource is
                      unavailable.
   PPL$M_SPIN_WAIT    Indicates that the caller is never to block,
                      but rather to always spin while waiting at
                      this barrier.
   PPL$M_SPIN_        Indicates that the caller wishes to spin for
   COUNTED            a given amount of instructions and then to
                      block. The default is block immediately, do
                      not spin at all.
 

spin

   OpenVMS usage mask_longword
   type          long (unsigned)
   access        read only
   mechanism     by reference
   This value must be specified when using the PPL$M_SPIN_COUNTED
   flag and represents a relative time that a process will spin
   before blocking.