From 1b2cb79cec1d587f4a529f8d1e862efeee3e965c Mon Sep 17 00:00:00 2001
From: Fabian Stemmler <stemmler@in.tum.de>
Date: Sat, 5 Oct 2019 16:58:52 +0200
Subject: [PATCH] Fixed 2 Simulation bugs

Pausing the timeline now stops the execution of events during
executeUntil() -> suspending the DebugTarget on a rising edge of the
clock now has an immediate effect

The Simulation can no longer lag behind the TimeFunction, as the
TimeFunction is now set back in such an event
---
 .../logic/core/timeline/Timeline.java         | 27 ++++++++++++-------
 .../mograsim/logic/model/LogicExecuter.java   |  7 ++++-
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/Timeline.java b/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/Timeline.java
index 5fcb111e..12cf5bd1 100644
--- a/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/Timeline.java
+++ b/plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/timeline/Timeline.java
@@ -16,7 +16,7 @@ public class Timeline
 {
 	private PriorityQueue<InnerEvent> events;
 	private TimeFunction time;
-	private long lastTimeUpdated = 0;
+	private long processedUntil = 0;
 	private long eventCounter = 0;
 
 	private final List<Consumer<TimelineEvent>> eventAddedListener;
@@ -27,13 +27,13 @@ public class Timeline
 		@Override
 		public void setTime(long time)
 		{
-			lastTimeUpdated = time;
+			processedUntil = time;
 		}
 
 		@Override
 		public long getTime()
 		{
-			return lastTimeUpdated;
+			return processedUntil;
 		}
 	};
 	public final TimeFunction realTimeExec = new TimeFunction()
@@ -119,7 +119,7 @@ public class Timeline
 	{
 		if (events.isEmpty())
 		{
-			lastTimeUpdated = getSimulationTime();
+			processedUntil = getSimulationTime();
 			return ExecutionResult.NOTHING_DONE;
 		}
 		working();
@@ -131,19 +131,18 @@ public class Timeline
 			{
 				event = events.remove();
 			}
-			lastTimeUpdated = event.getTiming();
+			processedUntil = event.getTiming();
 			event.run();
 			// Don't check after every run
 			checkStop = (checkStop + 1) % 10;
 			if (checkStop == 0 && System.currentTimeMillis() >= stopMillis)
 			{
 				notWorking();
-				lastTimeUpdated = getSimulationTime();
 				return ExecutionResult.EXEC_OUT_OF_TIME;
 			}
 		}
 		notWorking();
-		lastTimeUpdated = getSimulationTime();
+		processedUntil = getSimulationTime();
 		return hasNext() ? ExecutionResult.EXEC_UNTIL_EMPTY : ExecutionResult.EXEC_UNTIL_CONDITION;
 	}
 
@@ -165,7 +164,7 @@ public class Timeline
 	 */
 	public long getSimulationTime()
 	{
-		return isWorking() ? lastTimeUpdated : time.getTime();
+		return isWorking() ? processedUntil : time.getTime();
 	}
 
 	/**
@@ -189,7 +188,7 @@ public class Timeline
 		{
 			events.clear();
 		}
-		lastTimeUpdated = time.getTime();
+		processedUntil = time.getTime();
 	}
 
 	/**
@@ -288,7 +287,7 @@ public class Timeline
 		{
 			eventsString = events.toString();
 		}
-		return String.format("Simulation time: %s, Last update: %d, Events: %s", getSimulationTime(), lastTimeUpdated, eventsString);
+		return String.format("Simulation time: %s, Last update: %d, Events: %s", getSimulationTime(), processedUntil, eventsString);
 	}
 
 	public static enum ExecutionResult
@@ -302,4 +301,12 @@ public class Timeline
 
 		void setTime(long time);
 	}
+
+	/**
+	 * Sets the time of the {@link TimeFunction} to the timestamp of the latest processed event
+	 */
+	public void synchTime()
+	{
+		time.setTime(processedUntil);
+	}
 }
\ No newline at end of file
diff --git a/plugins/net.mograsim.logic.model/src/net/mograsim/logic/model/LogicExecuter.java b/plugins/net.mograsim.logic.model/src/net/mograsim/logic/model/LogicExecuter.java
index 1eff4112..52adeba0 100644
--- a/plugins/net.mograsim.logic.model/src/net/mograsim/logic/model/LogicExecuter.java
+++ b/plugins/net.mograsim.logic.model/src/net/mograsim/logic/model/LogicExecuter.java
@@ -5,6 +5,7 @@ import java.util.concurrent.atomic.AtomicLong;
 
 import net.mograsim.logic.core.timeline.PauseableTimeFunction;
 import net.mograsim.logic.core.timeline.Timeline;
+import net.mograsim.logic.core.timeline.Timeline.ExecutionResult;
 
 //TODO maybe move to logic core?
 public class LogicExecuter
@@ -42,7 +43,11 @@ public class LogicExecuter
 				while (shouldBeRunningLive.get())
 				{
 					long current = tf.getTime();
-					timeline.executeUntil(timeline.laterThan(current), System.currentTimeMillis() + 10);
+					// The tf.isPaused() condition is justified, because timeline.getSimulationTime() returns the timestamp of the last
+					// processed event during executeUntil()
+					if (timeline.executeUntil(() -> timeline.laterThan(current).getAsBoolean() || tf.isPaused(),
+							System.currentTimeMillis() + 10) == ExecutionResult.EXEC_OUT_OF_TIME)
+						timeline.synchTime(); // TODO: should this also be called if tf.isPaused() condition is met?
 					long nextEventTime = timeline.nextEventTime();
 					long sleepTime;
 					if (timeline.hasNext())
-- 
2.17.1