src/java.desktop/macosx/native/libawt_lwawt/awt/LWCToolkit.m

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -368,17 +368,27 @@
  * Signature: (J)Z
  */
 JNIEXPORT jboolean JNICALL Java_sun_lwawt_macosx_LWCToolkit_nativeSyncQueue
 (JNIEnv *env, jobject self, jlong timeout)
 {
-    int currentEventNum = [AWTToolkit getEventCount];
+    long currentEventNum = [AWTToolkit getEventCount];
 
     NSApplication* sharedApp = [NSApplication sharedApplication];
     if ([sharedApp isKindOfClass:[NSApplicationAWT class]]) {
         NSApplicationAWT* theApp = (NSApplicationAWT*)sharedApp;
-        [theApp postDummyEvent];
-        [theApp waitForDummyEvent:timeout];
+        // We use two different API to post events to the application,
+        //  - [NSApplication postEvent]
+        //  - CGEventPost(), see CRobot.m
+        // It was found that if we post an event via CGEventPost in robot and
+        // immediately after this we will post the second event via
+        // [NSApp postEvent] then sometimes the second event will be handled
+        // first. The opposite isn't proved, but we use both here to be safer.
+        [theApp postDummyEvent:false];
+        [theApp waitForDummyEvent:timeout / 2.0];
+        [theApp postDummyEvent:true];
+        [theApp waitForDummyEvent:timeout / 2.0];
+
     } else {
         // could happen if we are embedded inside SWT application,
         // in this case just spin a single empty block through 
         // the event loop to give it a chance to process pending events
         [JNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){}];