Adding StateMachine.hasMessages(), StateMachine.hasDeferredMessages()

Bug: 23067429
Change-Id: Ia66fd1a6ff248520e86f6e502767b22c4d9d4814

core/java/com/android/internal/util/StateMachine.java

@@ -1878,6 +1878,33 @@ public class StateMachine {
         }
     }
 
+    /**
+     * Check if there are any pending messages with code 'what' in deferred messages queue.
+     */
+    protected final boolean hasDeferredMessages(int what) {
+        SmHandler smh = mSmHandler;
+        if (smh == null) return false;
+
+        Iterator<Message> iterator = smh.mDeferredMessages.iterator();
+        while (iterator.hasNext()) {
+            Message msg = iterator.next();
+            if (msg.what == what) return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Check if there are any pending posts of messages with code 'what' in
+     * the message queue. This does NOT check messages in deferred message queue.
+     */
+    protected final boolean hasMessages(int what) {
+        SmHandler smh = mSmHandler;
+        if (smh == null) return false;
+
+        return smh.hasMessages(what);
+    }
+
     /**
      * Validate that the message was sent by
      * {@link StateMachine#quit} or {@link StateMachine#quitNow}.