X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=era.mi%2Fsrc%2Fera%2Fmi%2Flogic%2Ftimeline%2FTimeline.java;h=c0100632a25f4590b9a40eefe69d5d5f2bf9e59e;hb=08e8b43a28e078ec84cff02edf9d640bcbad2a35;hp=2392f4c20d7329c00ba9891db67837d66c772acb;hpb=33d4533c5e48fbb5d1d0057f2b08d3d6f8e29a87;p=Mograsim.git

diff --git a/era.mi/src/era/mi/logic/timeline/Timeline.java b/era.mi/src/era/mi/logic/timeline/Timeline.java
index 2392f4c2..c0100632 100644
--- a/era.mi/src/era/mi/logic/timeline/Timeline.java
+++ b/era.mi/src/era/mi/logic/timeline/Timeline.java
@@ -1,95 +1,203 @@
 package era.mi.logic.timeline;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.PriorityQueue;
+import java.util.function.BooleanSupplier;
+import java.util.function.Consumer;
+import java.util.function.LongSupplier;
 
 /**
  * Orders Events by the time they are due to be executed. Can execute Events individually.
+ * 
  * @author Fabian Stemmler
  *
  */
 public class Timeline
 {
 	private PriorityQueue<InnerEvent> events;
-	private long currentTime = 0;
-	
+	private LongSupplier time;
+	private long lastTimeUpdated = 0;
+
+	private final List<Consumer<TimelineEvent>> eventAddedListener;
+
 	public Timeline(int initCapacity)
 	{
-		events = new PriorityQueue<InnerEvent>(initCapacity, (a, b) -> {
-			long difference = a.getTiming() - b.getTiming();
-			if(difference == 0)
-				return 0;
-			return difference < 0 ? -1 : 1;
-		});
+		events = new PriorityQueue<InnerEvent>(initCapacity);
+
+		eventAddedListener = new ArrayList<>();
+		time = () -> lastTimeUpdated;
+	}
+
+	/**
+	 * @param timestamp exclusive
+	 * @return true if the first event is later than the timestamp
+	 */
+	public BooleanSupplier laterThan(long timestamp)
+	{
+		return () -> timeCmp(events.peek().getTiming(), timestamp) > 0;
 	}
-	
+
 	public boolean hasNext()
 	{
 		return !events.isEmpty();
 	}
 
+	/**
+	 * Executes all events at the next timestamp, at which there are any
+	 */
 	public void executeNext()
 	{
-		InnerEvent first = events.poll();
-		currentTime = first.getTiming();
-		first.run();
+		InnerEvent first = events.peek();
+		if (first != null)
+			executeUntil(laterThan(first.getTiming()), -1);
 	}
-	
+
 	public void executeAll()
 	{
 		while (hasNext())
 			executeNext();
 	}
 
+	/**
+	 * Executes all events until a given condition is met. The simulation process can be constrained by a real world timestamp.
+	 * 
+	 * @param condition  the condition until which the events are be processed
+	 * @param stopMillis the System.currentTimeMillis() when simulation definitely needs to stop. A value of -1 means no timeout.
+	 * @return State of the event execution
+	 * @formatter:off
+	 * <code>NOTHING_DONE</code> if the {@link Timeline} was already empty
+	 * <code>EXEC_OUT_OF_TIME</code> if the given maximum time was reached
+	 * <code>EXEC_UNTIL_CONDITION</code> if the condition was met
+	 * <code>EXEC_UNTIL_EMPTY</code> if events were executed until the {@link Timeline} was empty
+	 * @formatter:on
+	 * @author Christian Femers, Fabian Stemmler
+	 */
+	public ExecutionResult executeUntil(BooleanSupplier condition, long stopMillis)
+	{
+		if (events.isEmpty())
+		{
+			lastTimeUpdated = getSimulationTime();
+			return ExecutionResult.NOTHING_DONE;
+		}
+		int checkStop = 0;
+		InnerEvent first = events.peek();
+		while (hasNext() && !condition.getAsBoolean())
+		{
+			events.remove();
+			lastTimeUpdated = first.getTiming();
+			first.run();
+			// Don't check after every run
+			checkStop = (checkStop + 1) % 10;
+			if (checkStop == 0 && System.currentTimeMillis() >= stopMillis)
+				return ExecutionResult.EXEC_OUT_OF_TIME;
+			first = events.peek();
+		}
+		lastTimeUpdated = getSimulationTime();
+		return hasNext() ? ExecutionResult.EXEC_UNTIL_EMPTY : ExecutionResult.EXEC_UNTIL_CONDITION;
+	}
+
+	public void setTimeFunction(LongSupplier time)
+	{
+		this.time = time;
+	}
+
 	public long getSimulationTime()
 	{
-		return currentTime;
+		return time.getAsLong();
+	}
+
+	public long nextEventTime()
+	{
+		if (!hasNext())
+			return -1;
+		return events.peek().getTiming();
 	}
-	
+
 	public void reset()
 	{
 		events.clear();
-		currentTime = 0;
+		lastTimeUpdated = 0;
+	}
+
+	public void addEventAddedListener(Consumer<TimelineEvent> listener)
+	{
+		eventAddedListener.add(listener);
+	}
+
+	public void removeEventAddedListener(Consumer<TimelineEvent> listener)
+	{
+		eventAddedListener.remove(listener);
 	}
-	
+
 	/**
 	 * Adds an Event to the {@link Timeline}
-	 * @param function The {@link TimelineEventHandler} that will be executed, when the {@link InnerEvent} occurs on the timeline.
+	 * 
+	 * @param function       The {@link TimelineEventHandler} that will be executed, when the {@link InnerEvent} occurs on the timeline.
 	 * @param relativeTiming The amount of MI ticks in which the {@link InnerEvent} is called, starting from the current time.
 	 */
 	public void addEvent(TimelineEventHandler function, int relativeTiming)
 	{
-		long timing = currentTime + relativeTiming;
-		events.add(new InnerEvent(function, new TimelineEvent(timing), timing));
+		long timing = getSimulationTime() + relativeTiming;
+		TimelineEvent event = new TimelineEvent(timing);
+		events.add(new InnerEvent(function, event));
+		eventAddedListener.forEach(l -> l.accept(event));
 	}
-	
-	private class InnerEvent
-	{
 
-		private final long timing;
+	private class InnerEvent implements Runnable, Comparable<InnerEvent>
+	{
 		private final TimelineEventHandler function;
 		private final TimelineEvent event;
-		
+
 		/**
 		 * Creates an {@link InnerEvent}
+		 * 
 		 * @param function {@link TimelineEventHandler} to be executed when the {@link InnerEvent} occurs
-		 * @param timing Point in the MI simulation {@link Timeline}, at which the {@link InnerEvent} is executed;
+		 * @param timing   Point in the MI simulation {@link Timeline}, at which the {@link InnerEvent} is executed;
 		 */
-		InnerEvent(TimelineEventHandler function, TimelineEvent event, long timing)
+		InnerEvent(TimelineEventHandler function, TimelineEvent event)
 		{
 			this.function = function;
 			this.event = event;
-			this.timing = timing;
 		}
 
 		public long getTiming()
 		{
-			return timing;
+			return event.getTiming();
 		}
-		
+
+		@Override
 		public void run()
 		{
 			function.handle(event);
 		}
-		
+
+		@Override
+		public String toString()
+		{
+			return event.toString();
+		}
+
+		@Override
+		public int compareTo(InnerEvent o)
+		{
+			return timeCmp(getTiming(), o.getTiming());
+		}
+	}
+
+	public static int timeCmp(long a, long b)
+	{
+		return Long.signum(a - b);
+	}
+
+	@Override
+	public String toString()
+	{
+		return String.format("Simulation time: %s, Last update: %d, Events: %s", getSimulationTime(), lastTimeUpdated, events.toString());
+	}
+
+	public enum ExecutionResult
+	{
+		NOTHING_DONE, EXEC_UNTIL_EMPTY, EXEC_UNTIL_CONDITION, EXEC_OUT_OF_TIME
 	}
 }
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