finishevent.java

对于CPU线程调度的模拟

package simcpu;

public class FinishEvent extends Event {

	public FinishEvent(int time, EventDriver driver, SimSystem sys) {
		super(time, driver, sys);
	}

	@Override
	public void handel() {
		SimThread nextThread = sys.schedul();
		SimThread curThread = sys.getRunningThread();
		curThread.setState(State.TERMINTED);
		curThread.setFinishTime(driver.getNow());
		curThread.setRoundTime(driver.getNow()-curThread.getArrivalTime());
		sys.setRunningThread(null);
		
		DataSource.addTurnroundTime(curThread.getRoundTime());
		
		if(nextThread==null || nextThread==curThread) {
			sys.setCpuBusy(false);
			return;
		}
		
		sys.readyQueue.remove(nextThread);
		
		int overhead = (curThread.getPid() == nextThread.getPid() ? DataSource
				.getThreadSwith() : DataSource.getProcessSwitch());
		driver.predict(new OverheadEvent(driver.now + overhead, driver, sys,
				nextThread));
	}

}