hades.simulator
Class RealTimeSimKernel

java.lang.Object
  hades.simulator.SimKernel
      hades.simulator.RealTimeSimKernel

All Implemented Interfaces:

ContextToolTip, java.lang.Runnable, Simulatable

public class RealTimeSimKernel

extends SimKernel

implements java.lang.Runnable

RealTimeSimKernel -- A subclass of the event-based HADES simulation engine with support for interactive 'real time' simulation 'a la DIGLOG.

Once started, the RealTimeSimKernel will dispatch Events in real time: No events will be processed faster than their scheduled time (in seconds). Naturally, Events cannot be processed faster than the Java virtual machine allows.

If no Events remain, the RealTimeSimKernel will enter into a sleep phase, polling the EventList all 100msec, to look for further interactive (user generated) Events.

Field Summary

(package private) static boolean	ddebug
(package private) static boolean	debug
(package private) int	delta_resync_iterations
(package private) double	eventTime
(package private) int	global_errors
(package private) double	lastSyncTime
(package private) int	n_resync_iterations
(package private) double	realTime
static int	t_sleep
(package private) long	t0
(package private) long	t1
(package private) static java.lang.String	versionString

Fields inherited from class hades.simulator.SimKernel

commandQueue, console, controlPanel, design, ELABORATE, endTime, eventList, n_interactive, n_interactive_transferred, n_iterations, n_processed, n_scheduled, n_simulators, name, painter, PAUSED, RESET, runner, RUNNING, shouldStop, simTime, simulatorID, SINGLESTEP, state, STOPPED

Constructor Summary

RealTimeSimKernel()
constructor for an so far idle simulation engine

Method Summary

void	addPendingEvent(SimEvent se, Port target) the standard simulation engines don't support VHDL-style two-list simulation with delta-cycles.
void	initializeSimulator() initialize the simulator: stop any running simulation, then create a new eventlist, initialize start and end times, ...
void	printStatus() printStatus(): print a short message about current simulation and real times, as well as the number of scheduled and processed events.
void	resync() resync(): update our 'realTime' variable from the JVM system clock.
void	run() run the simulation until ready or interrupted.
void	runForever() set the simulation end time to Double.MAX_VALUE, then start/continue the simulation from the current time.
void	sleep() sleep for t_sleep milliseconds.
java.lang.String	toString() standard identification method

Methods inherited from class hades.simulator.SimKernel

checkClearWaveforms, continueSimulation, dbg, deleteAllEventsFromSource, elaborate, elaborateComponents, evaluate, executeSingleStep, getDebug, getEventList, getNumberOfProcessedEvents, getNumberOfScheduledEvents, getSimTime, getState, getSyncPainter, getToolTip, hasEvents, isPaused, isReset, isRunning, isSingleStep, main, message, pauseSimulation_NEW, pauseSimulation, printNextPendingEvent, processPendingRepaints, run_debug, runFor, scheduleEvent, scheduleInteractiveEvent, scheduleWakeup, setConsole, setControlPanel, setDebug, setDesign, setName, setSyncPainter, singleStep, stopSimulation_NEW, stopSimulation, usage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

debug

static boolean debug

ddebug

static boolean ddebug

versionString

static java.lang.String versionString

realTime

double realTime

lastSyncTime

double lastSyncTime

eventTime

double eventTime

t0

long t0

t1

long t1

n_resync_iterations

int n_resync_iterations

delta_resync_iterations

int delta_resync_iterations

global_errors

int global_errors

t_sleep

public static int t_sleep

Constructor Detail

RealTimeSimKernel

public RealTimeSimKernel()

constructor for an so far idle simulation engine

Method Detail

runForever

public void runForever()

set the simulation end time to Double.MAX_VALUE, then start/continue the simulation from the current time.

Overrides:

runForever in class SimKernel

initializeSimulator

public void initializeSimulator()

Description copied from class: SimKernel

initialize the simulator: stop any running simulation, then create a new eventlist, initialize start and end times, ...

Overrides:

initializeSimulator in class SimKernel

addPendingEvent

public void addPendingEvent(SimEvent se,
                            Port target)

the standard simulation engines don't support VHDL-style two-list simulation with delta-cycles. Therefore, instead of storing a 'pending event' for later execution, we execute it right now.

Overrides:

addPendingEvent in class SimKernel

run

public void run()

run the simulation until ready or interrupted. This method processes all remaining SimEvents in 'real time' as follows: All Events with scheduled time smaller than the current time are processed as fast as possible. If no such Events remain, the simulator Thread will sleep() itself for 100msec. each, until the user generates new Events or the time is ripe for the Events scheduled for later times.

Variable 't0' holds the JVM clock at start of the simulation, 't1' is used for the curent JVM clock value.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class SimKernel

resync

public void resync()

resync(): update our 'realTime' variable from the JVM system clock.

printStatus

public void printStatus()

printStatus(): print a short message about current simulation and real times, as well as the number of scheduled and processed events.

Overrides:

printStatus in class SimKernel

sleep

public void sleep()

sleep for t_sleep milliseconds.

toString

public java.lang.String toString()

standard identification method

Overrides:

toString in class SimKernel