$JOIN_RMW

   Adds a new Resource Manager (RM) participant to a transaction.

   $JOIN_RMW always waits for the request to complete before
   returning to the caller. Other than this, it is identical to
   $JOIN_RM.

   Format

     SYS$JOIN_RMW  [efn] ,[flags] ,iosb ,[astadr] ,[astprm] ,rm_id

                   [,[tid] ,[part_name] ,[rm_context] ,[timout]

                   ,[bid] ]

   C Prototype

     int sys$join_rmw  (unsigned int efn, unsigned int

                       flags, struct _iosb *iosb, void

                       (*astadr)(__unknown_params), int

                       astprm, unsigned int rm_id,...);