Merge pull request #3767 from michaelcontento/android-add-runOnGLThread-back-again

[ci skip]re-introduce Cocos2dxHelper.runOnGLThread(Runnable)

cocos2dx/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java

@@ -23,8 +23,10 @@ THE SOFTWARE.
  ****************************************************************************/
 package org.cocos2dx.lib;
 
+import java.util.concurrent.ConcurrentLinkedQueue;
 import java.io.UnsupportedEncodingException;
 import java.util.Locale;
+import java.lang.Runnable;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -44,6 +46,7 @@ public class Cocos2dxHelper {
 	// Constants
 	// ===========================================================
 	private static final String PREFS_NAME = "Cocos2dxPrefsFile";
+	private static final int RUNNABLES_PER_FRAME = 5;
 
 	// ===========================================================
 	// Fields
@@ -57,7 +60,8 @@ public class Cocos2dxHelper {
 	private static String sFileDirectory;
 	private static Activity sActivity = null;
 	private static Cocos2dxHelperListener sCocos2dxHelperListener;
-	
+	private static ConcurrentLinkedQueue<Runnable> jobs = new ConcurrentLinkedQueue<Runnable>();
+
     /**
      * Optional meta-that can be in the manifest for this component, specifying
      * the name of the native shared library to load.  If not specified,
@@ -70,6 +74,20 @@ public class Cocos2dxHelper {
 	// Constructors
 	// ===========================================================
 
+	public static void dispatchPendingRunnables() {
+		for (int i = RUNNABLES_PER_FRAME; i > 0; i--) {
+			Runnable job = jobs.poll();
+			if (job == null) {
+				return;
+			}
+			job.run();
+		}
+	}
+
+	public static void runOnGLThread(final Runnable r) {
+		jobs.add(r);
+	}
+
 	public static void init(final Activity activity) {
 		final ApplicationInfo applicationInfo = activity.getApplicationInfo();
 		

cocos2dx/platform/android/nativeactivity.cpp

@@ -211,6 +211,30 @@ static cocos_dimensions engine_init_display(struct engine* engine) {
     return r;
 }
 
+/**
+ * Invoke the dispatching of the next bunch of Runnables in the Java-Land
+ */
+static void dispatch_pending_runnables() {
+    static cocos2d::JniMethodInfo info;
+    static bool initialized = false;
+
+    if (!initialized) {
+        initialized = cocos2d::JniHelper::getStaticMethodInfo(
+            info,
+            "org/cocos2dx/lib/Cocos2dxHelper",
+            "dispatchPendingRunnables",
+            "()V"
+        );
+
+        if (!initialized) {
+            LOGW("Unable to dispatch pending Runnables!");
+            return;
+        }
+    }
+
+    info.env->CallStaticVoidMethod(info.classID, info.methodID);
+}
+
 /**
  * Just the current frame in the display.
  */
@@ -225,6 +249,7 @@ static void engine_draw_frame(struct engine* engine) {
         return;
     }
 
+    dispatch_pending_runnables();
     cocos2d::Director::getInstance()->mainLoop();
     LOG_RENDER_DEBUG("engine_draw_frame : just called cocos' mainLoop()");