gcc/testsuite/gm2/cse/pass/testcse31.mod

   1 (* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. *)
   2 (* This file is part of GNU Modula-2.
   3
   4 GNU Modula-2 is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 GNU Modula-2 is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License along
  15 with gm2; see the file COPYING.  If not, write to the Free Software
  16 Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)
  17 MODULE testcse31 ;
  18
  19 FROM SYSTEM IMPORT ADDRESS ;
  20
  21 TYPE
  22    DESCRIPTOR= POINTER TO Descriptor ;    (* handle onto a process         *)
  23    Descriptor= RECORD
  24                   Volatiles  : ADDRESS ;  (* process volatile environment  *)
  25                END ;
  26
  27 PROCEDURE TRANSFER (p1, p2: ADDRESS) ;
  28 BEGIN
  29 END TRANSFER ;
  30
  31 PROCEDURE Reschedule ; (* (VAR From, Highest: DESCRIPTOR) ; *)
  32 VAR From, Highest: DESCRIPTOR ;
  33 BEGIN
  34    Highest := NIL ;
  35    IF From#CurrentProcess
  36    THEN
  37       From := CurrentProcess ;
  38       CurrentProcess := Highest ;
  39       TRANSFER(From^.Volatiles, Highest^.Volatiles)
  40    END
  41 END Reschedule ;
  42
  43
  44 VAR
  45    CurrentProcess: DESCRIPTOR ;
  46 BEGIN
  47    Reschedule ; (* (CurrentProcess, CurrentProcess) ; *)
  48    CurrentProcess := NIL
  49 END testcse31.