v0.9.2b: simplified thread coordination to reduce deadlock risk

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

@@ -26,7 +26,6 @@ import com.shatteredpixel.shatteredpixeldungeon.Statistics;
 import com.shatteredpixel.shatteredpixeldungeon.actors.blobs.Blob;
 import com.shatteredpixel.shatteredpixeldungeon.actors.buffs.Buff;
 import com.shatteredpixel.shatteredpixeldungeon.actors.mobs.Mob;
-import com.shatteredpixel.shatteredpixeldungeon.scenes.GameScene;
 import com.watabou.utils.Bundlable;
 import com.watabou.utils.Bundle;
 import com.watabou.utils.SparseArray;
@@ -283,11 +282,9 @@ public abstract class Actor implements Bundlable {
 						current = null;
 						interrupted = false;
 					}
-					
-					synchronized (GameScene.class){
-						//signals to the gamescene that actor processing is finished for now
-						GameScene.class.notify();
-					}
+
+					//signals to the gamescene that actor processing is finished for now
+					Thread.currentThread().notify();
 					
 					try {
 						Thread.currentThread().wait();

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

@@ -555,21 +555,17 @@ public class GameScene extends PixelScene {
 	}
 
 	public boolean waitForActorThread(int msToWait ){
-		synchronized (GameScene.class) {
-			if (actorThread == null || !actorThread.isAlive()) {
-				return true;
-			}
-			synchronized (actorThread) {
-				actorThread.interrupt();
-			}
+		if (actorThread == null || !actorThread.isAlive()) {
+			return true;
+		}
+		synchronized (actorThread) {
+			actorThread.interrupt();
 			try {
-				GameScene.class.wait(msToWait);
+				actorThread.wait(msToWait);
 			} catch (InterruptedException e) {
 				ShatteredPixelDungeon.reportException(e);
 			}
-			synchronized (actorThread) {
-				return !Actor.processing();
-			}
+			return !Actor.processing();
 		}
 	}