Quelle environment.vdmrt Sprache: VDM

class Environment is subclass of GLOBAL

types

InputTP   = (Time * seq of inline);

inline  = FOId * int * int * Altitude * Time;

FOOut = FOId * Coordinates * Altitude * FOWarning *
        MinimumSafetyAltitude * Time;
RadarOut = Coordinates * nat1 * RadarWarning * nat *  Time;


outline = FOOut | RadarOut;

instance variables

  io : IO := new IO();
  inlines  : seq of inline  := [];
  outlines : seq of outline := [];

  airspace : [AirSpace] := nil;
  busy : bool := true;
  updating : bool := false;
  simtime : Time;
operations

public Environment : String ==> Environment
Environment(fname) ==
  def mk_(-,mk_(timeval,input)) = io.freadval[InputTP](fname)
  in
    (inlines := input;
     simtime := timeval);

public setAirSpace : AirSpace ==> ()
setAirSpace(as) ==
  airspace := as;

public handleFOWarningEvent : FOId * Coordinates * Altitude * FOWarning *
                              MinimumSafetyAltitude * Time ==> ()
handleFOWarningEvent(id,coord,alt,warn,msa,t) ==
  outlines := outlines ^ [mk_(id,coord,alt,warn,msa,t)];

public handleRadarWarningEvent : Coordinates * nat1 * RadarWarning *
                                 nat *  Time ==> ()
handleRadarWarningEvent(coord,range,radWarn,num,pt) ==
  outlines := outlines ^ [mk_(coord,range,radWarn,num,pt)];

public showResult : () ==> ()
showResult() ==
  def - = io.writeval[seq of outline](outlines) in skip;

private updateFOs : () ==> ()
updateFOs() ==
(if len inlines > 0
  then
    (dcl curtime : Time := time,
         done : bool := false;
     while not done do
       def mk_(id,x,y, altitude,pt) = hd inlines
       in
         if pt <= curtime
         then
          (airspace.updateFO(id,mk_Coordinates(x,y),altitude);
           inlines := tl inlines;
           updating := true;
           done := len inlines = 0
           )
         else done := true
     )
  else busy := false
);


public isFinished : () ==> ()
isFinished() == skip;

sync

mutex(updateFOs);
mutex(handleFOWarningEvent,updateFOs,handleRadarWarningEvent);

mutex(handleFOWarningEvent);

per isFinished => not busy;

mutex(handleRadarWarningEvent);
mutex(handleRadarWarningEvent,handleFOWarningEvent);

thread
periodic (1000E6,10,30,0)(updateFOs)

end Environment

quality92%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.