Topspeed_JPI/gpm/M2SYM/COROUTIN.DEF

(* ========================================================= *)
(* Preliminary library module for Gardens Point Modula       *)
(* ========================================================= *)

FOREIGN DEFINITION MODULE Coroutines;(* coroutines as in PIM *)

  IMPORT IMPLEMENTATION FROM "coroutines.obj";
  FROM SYSTEM IMPORT ADDRESS;

  TYPE Coroutine = ADDRESS;  (* use of this type avoids SYSTEM import *)

  PROCEDURE NEWPROCESS (code  : PROC;		(* body of coroutine  *)	
			space : ADDRESS;	(* ptr to workspace   *)
			size  : CARDINAL;	(* size of workspace  *)
		    VAR this  : Coroutine);	(* returned coroutine *)

  PROCEDURE TRANSFER (VAR thisCo : Coroutine;	(* current saved here *)
		      VAR destCo : Coroutine);  (* target to activate *)

END Coroutines.