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% $Id: simulation.sim,v 1.4 1997/02/14 16:33:03 cim Exp $
% Copyright (C) 1994 Sverre Hvammen Johansen and Stein Krogdahl,
% Department of Informatics, University of Oslo.
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; version 2.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
%ifdef included
%else
%timestamp simulation
%endif
% nameasvar on
%nonetest off
%casesensitive on
SIMSET CLASS SIMULATION;
BEGIN
REF(PROCESS) zzsqs;
REF(zzmain_program)MAIN;
REF(PROCESS) PROCEDURE CURRENT; CURRENT:-zzsqs.zzsqssuc;
LONG REAL PROCEDURE TIME; TIME:=zzsqs.zzsqssuc.zzevtime;
LINK CLASS PROCESS;
BEGIN
! From event notice: ;
REF(PROCESS) zzsqssuc, zzsqspred;
LONG REAL zzevtime;
! From old process: ;
BOOLEAN zzterminated_process;
BOOLEAN PROCEDURE IDLE; IDLE:= (zzsqssuc==NONE);
BOOLEAN PROCEDURE TERMINATED; TERMINATED:=zzterminated_process;
LONG REAL PROCEDURE EVTIME;
IF zzsqssuc==NONE THEN ERROR("No Evtime for idle process")
ELSE EVTIME:= zzevtime;
REF(PROCESS) PROCEDURE NEXTEV;
NEXTEV:-IF zzsqssuc==NONE OR ELSE zzsqssuc==zzsqs THEN NONE
ELSE zzsqssuc;
! Not necessary: ; zzsqssuc:- zzsqspred:- NONE;
DETACH;
INNER;
zzterminated_process:=TRUE;
! Remove from SQS: ;
zzsqssuc.zzsqspred:- zzsqspred;
zzsqspred.zzsqssuc:- zzsqssuc;
zzsqspred:- zzsqssuc:- NONE;
IF zzsqs.zzsqssuc==zzsqs THEN ERROR("SQS: Empty")
ELSE RESUME(zzsqs.zzsqssuc);
ERROR("SQS: Terminated process");
END PROCESS;
PROCEDURE activat(REAC,X,CODE,T,Y,PRIO);
REF(PROCESS)X,Y;
BOOLEAN REAC,PRIO;
CHARACTER CODE;
LONG REAL T;
BEGIN
REF(PROCESS) b, cur;
LONG REAL tm;
IF X =/= NONE AND THEN NOT X.zzterminated_process
AND THEN (REAC OR ELSE X.zzsqssuc == NONE) THEN
BEGIN
cur:- zzsqs.zzsqssuc; tm:=cur.zzevtime;
IF CODE = '!1!' THEN
BEGIN ! Direct ;
IF X==cur THEN GOTO exit;
T:=tm; b:- zzsqs;
END ELSE
IF CODE = '!2!' THEN
BEGIN !At;
IF T<=tm THEN
BEGIN IF PRIO AND THEN X==cur THEN GOTO exit ELSE T:=tm END;
END ELSE
IF CODE = '!3!' THEN
BEGIN !Delay;
T:= T+tm;
IF T<=tm THEN
BEGIN IF PRIO AND THEN X==cur THEN GOTO exit ELSE T:=tm END;
END ELSE
! CODE = '!4!' OR CODE = '!5!' ;
BEGIN ! 4=Before, 5=After ;
IF Y==NONE OR ELSE Y.zzsqssuc==NONE THEN
BEGIN
IF X.zzsqssuc=/=NONE THEN
BEGIN
X.zzsqssuc.zzsqspred:- X.zzsqspred;
X.zzsqspred.zzsqssuc:- X.zzsqssuc;
X.zzsqspred:- NONE; X.zzsqssuc:- NONE;
END;
IF zzsqs.zzsqssuc==zzsqs THEN ERROR("SQS: Empty");
GOTO exit;
END;
IF X==Y THEN GOTO exit;
T:= Y.zzevtime;
IF CODE = '!4!' THEN b:- Y.zzsqspred ELSE b:- Y;
END;
IF X.zzsqssuc =/= NONE THEN
BEGIN
X.zzsqssuc.zzsqspred:- X.zzsqspred;
X.zzsqspred.zzsqssuc:- X.zzsqssuc;
END;
IF b==NONE THEN
BEGIN ! Not `direct', `after' or `before' ;
b:- zzsqs.zzsqspred;
WHILE b.zzevtime>T DO b:- b.zzsqspred;
IF PRIO THEN
WHILE b.zzevtime=T DO b:- b.zzsqspred;
END;
X.zzevtime:= T;
X.zzsqspred:- b; X.zzsqssuc:- b.zzsqssuc;
b.zzsqssuc:- X; X.zzsqssuc.zzsqspred:- X;
IF zzsqs.zzsqssuc=/=cur THEN RESUME(zzsqs.zzsqssuc);
END;
exit:
END activat;
PROCEDURE HOLD(t);
LONG REAL t;
BEGIN
REF(PROCESS) p,q; p:- zzsqs.zzsqssuc;
IF t>0 THEN p.zzevtime:= p.zzevtime + t;
t:= p.zzevtime; ! New evtime ;
IF p.zzsqssuc=/=zzsqs AND THEN p.zzsqssuc.zzevtime<=t THEN
BEGIN
p.zzsqssuc.zzsqspred:- p.zzsqspred;
p.zzsqspred.zzsqssuc:- p.zzsqssuc;
q:- zzsqs.zzsqspred;
WHILE q.zzevtime>t DO q:- q.zzsqspred;
p.zzsqspred:- q; p.zzsqssuc:- q.zzsqssuc;
q.zzsqssuc:- p; p.zzsqssuc.zzsqspred:- p;
RESUME(zzsqs.zzsqssuc);
END IF;
END HOLD;
PROCEDURE PASSIVATE;
BEGIN
REF(PROCESS) p; p:- zzsqs.zzsqssuc;
p.zzsqssuc.zzsqspred:- p.zzsqspred;
p.zzsqspred.zzsqssuc:- p.zzsqssuc;
p.zzsqspred:- NONE; p.zzsqssuc:- NONE;
IF zzsqs.zzsqssuc==zzsqs THEN ERROR("SQS: Empty")
ELSE RESUME(zzsqs.zzsqssuc);
END PASSIVATE;
PROCEDURE WAIT(S);REF(HEAD)S;
BEGIN
REF(PROCESS) p; p:- zzsqs.zzsqssuc;
p.INTO(S); ! May also be expanded inline ;
p.zzsqssuc.zzsqspred:- p.zzsqspred;
p.zzsqspred.zzsqssuc:- p.zzsqssuc;
p.zzsqspred:- NONE; p.zzsqssuc:- NONE;
IF zzsqs.zzsqssuc==zzsqs THEN ERROR("SQS: Empty")
ELSE RESUME(zzsqs.zzsqssuc);
END WAIT;
PROCEDURE CANCEL(x); REF(PROCESS)x;
BEGIN
REF(PROCESS) cur;
IF x=/=NONE AND THEN x.zzsqssuc=/=NONE THEN
BEGIN
cur:- zzsqs.zzsqssuc;
x.zzsqssuc.zzsqspred:- x.zzsqspred;
x.zzsqspred.zzsqssuc:- x.zzsqssuc;
x.zzsqspred:- NONE; x.zzsqssuc:- NONE;
IF x==cur THEN
BEGIN
IF zzsqs.zzsqssuc==zzsqs THEN ERROR("SQS: Empty")
ELSE RESUME(zzsqs.zzsqssuc);
END;
END;
END CANCEL;
PROCESS CLASS zzmain_program;
BEGIN
WHILE TRUE DO DETACH
END MAIN_PROGRAM;
PROCEDURE ACCUM(A,B,C,D);NAME A,B,C;
LONG REAL A,B,C,D;
BEGIN
A:=A+C*(TIME-B); B:=TIME; C:=C+D;
END ACCUM;
zzsqs:- NEW PROCESS; zzsqs.zzevtime:= -1;
MAIN:- NEW zzmain_program;
zzsqs.zzsqssuc:- MAIN; zzsqs.zzsqspred:- MAIN;
MAIN.zzsqssuc:- zzsqs; MAIN.zzsqspred:- zzsqs;
END SIMULATION;
%CASESENSITIVE OFF
%eof
|
