v0.4.3b: game logic thread now uses wait/notify

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Actor.java

@@ -222,7 +222,17 @@ public abstract class Actor implements Bundlable {
 				doNext = false;
 			}
 
-		} while (doNext);
+			if (!doNext){
+				synchronized (Thread.currentThread()) {
+					try {
+						Thread.currentThread().wait();
+					} catch (InterruptedException e) {
+						ShatteredPixelDungeon.reportException(e);
+					}
+				}
+			}
+
+		} while (true);
 	}
 	
 	public static void add( Actor actor ) {

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/GameScene.java

@@ -402,7 +402,12 @@ public class GameScene extends PixelScene {
 		}
 	}
 
-	private Thread t;
+	private final Thread t = new Thread() {
+		@Override
+		public void run() {
+			Actor.process();
+		}
+	};
 
 	@Override
 	public synchronized void update() {
@@ -414,16 +419,16 @@ public class GameScene extends PixelScene {
 		
 		if (!freezeEmitters) water.offset( 0, -5 * Game.elapsed );
 
-		if (!Actor.processing() && (t == null || !t.isAlive()) && Dungeon.hero.isAlive()) {
+		if (!Actor.processing() && Dungeon.hero.isAlive()) {
-			t = new Thread() {
+			if (!t.isAlive()) {
-				@Override
+				//if cpu time is limited, game should prefer drawing the current frame
-				public void run() {
+				t.setPriority(Thread.NORM_PRIORITY - 1);
-					Actor.process();
+				t.start();
+			} else {
+				synchronized (t) {
+					t.notify();
 				}
-			};
+			}
-			//if cpu time is limited, game should prefer drawing the current frame
-			t.setPriority(Thread.NORM_PRIORITY-1);
-			t.start();
 		}
 		
 		if (Dungeon.hero.ready && Dungeon.hero.paralysed == 0) {