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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef BASE_THREADING_JAVA_THREAD_H_
      6 #define BASE_THREADING_JAVA_THREAD_H_
      7 
      8 #include <jni.h>
      9 
     10 #include "base/android/scoped_java_ref.h"
     11 #include "base/memory/scoped_ptr.h"
     12 
     13 namespace base {
     14 
     15 class MessageLoop;
     16 class WaitableEvent;
     17 
     18 namespace android {
     19 
     20 // A Java Thread with a native message loop. To run tasks, post them
     21 // to the message loop and they will be scheduled along with Java tasks
     22 // on the thread.
     23 // This is useful for callbacks where the receiver expects a thread
     24 // with a prepared Looper.
     25 class BASE_EXPORT JavaHandlerThread {
     26  public:
     27   JavaHandlerThread(const char* name);
     28   virtual ~JavaHandlerThread();
     29 
     30   base::MessageLoop* message_loop() const { return message_loop_.get(); }
     31   void Start();
     32   void Stop();
     33 
     34   // Called from java on the newly created thread.
     35   // Start() will not return before this methods has finished.
     36   void InitializeThread(JNIEnv* env, jobject obj, jint event);
     37 
     38   static bool RegisterBindings(JNIEnv* env);
     39 
     40  private:
     41   scoped_ptr<base::MessageLoop> message_loop_;
     42   ScopedJavaGlobalRef<jobject> java_thread_;
     43 };
     44 
     45 }  // namespace android
     46 }  // namespace base
     47 
     48 #endif  // BASE_THREADING_JAVA_THREAD_H_
     49