Move talk/examples/* to webrtc/examples.

talk/examples/android/src/org/appspot/apprtc/util/LooperExecutor.java

-/*
- * libjingle
- * Copyright 2015 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package org.appspot.apprtc.util;
-
-import android.os.Handler;
-import android.os.Looper;
-import android.util.Log;
-
-import java.util.concurrent.Executor;
-
-/**
- * Looper based executor class.
- */
-public class LooperExecutor extends Thread implements Executor {
-  private static final String TAG = "LooperExecutor";
-  // Object used to signal that looper thread has started and Handler instance
-  // associated with looper thread has been allocated.
-  private final Object looperStartedEvent = new Object();
-  private Handler handler = null;
-  private boolean running = false;
-  private long threadId;
-
-  @Override
-  public void run() {
-    Looper.prepare();
-    synchronized (looperStartedEvent) {
-      Log.d(TAG, "Looper thread started.");
-      handler = new Handler();
-      threadId = Thread.currentThread().getId();
-      looperStartedEvent.notify();
-    }
-    Looper.loop();
-  }
-
-  public synchronized void requestStart() {
-    if (running) {
-      return;
-    }
-    running = true;
-    handler = null;
-    start();
-    // Wait for Hander allocation.
-    synchronized (looperStartedEvent) {
-      while (handler == null) {
-        try {
-          looperStartedEvent.wait();
-        } catch (InterruptedException e) {
-          Log.e(TAG, "Can not start looper thread");
-          running = false;
-        }
-      }
-    }
-  }
-
-  public synchronized void requestStop() {
-    if (!running) {
-      return;
-    }
-    running = false;
-    handler.post(new Runnable() {
-      @Override
-      public void run() {
-        Looper.myLooper().quit();
-        Log.d(TAG, "Looper thread finished.");
-      }
-    });
-  }
-
-  // Checks if current thread is a looper thread.
-  public boolean checkOnLooperThread() {
-    return (Thread.currentThread().getId() == threadId);
-  }
-
-  @Override
-  public synchronized void execute(final Runnable runnable) {
-    if (!running) {
-      Log.w(TAG, "Running looper executor without calling requestStart()");
-      return;
-    }
-    if (Thread.currentThread().getId() == threadId) {
-      runnable.run();
-    } else {
-      handler.post(runnable);
-    }
-  }
-
-}