Arguments

 

lock-id

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

   Lock-id is returned by PPL$CREATE_SPIN_LOCK.
 

flags

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

   PPL$M_NON_         The lock is seized if and only if it can
   BLOCKING           be done without causing the caller to wait
                      (spin). (This can be useful in situations
                      where the cost of waiting for a resource is
                      not desirable, or if the caller merely intends
                      to request immediate access to any one of a
                      number of resources.)