/*** EXTERNAL DECLARATIONS FOR THE PMM ***/

DECLARE
   Message$exchange  LITERALLY  'STRUCTURE (
     message$head  ADDRESS,
     message$tail  ADDRESS,
     task$head     ADDRESS,
     task$tail     ADDRESS,
     exchange$link ADDRESS)',

   RQFSAX   Message$exchange    EXTERNAL,  /* Free$space$pool (UC)Get$msg */
   RQFSRX   Message$exchange    EXTERNAL,  /* Free$Space$pool reclaimation */
   RQFLMX   Message$exchange    EXTERNAL;  /* (UC)Get$msg requests */