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_ANDROID_JAVA_HANDLER_THREAD_H_ 6 #define BASE_ANDROID_JAVA_HANDLER_THREAD_H_ 7 8 #include <jni.h> 9 10 #include <memory> 11 12 #include "base/android/scoped_java_ref.h" 13 14 namespace base { 15 16 class MessageLoop; 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, 37 const JavaParamRef<jobject>& obj, 38 jlong event); 39 void StopThread(JNIEnv* env, 40 const JavaParamRef<jobject>& obj, 41 jlong event); 42 43 virtual void StartMessageLoop(); 44 virtual void StopMessageLoop(); 45 46 static bool RegisterBindings(JNIEnv* env); 47 48 protected: 49 std::unique_ptr<base::MessageLoop> message_loop_; 50 51 private: 52 ScopedJavaGlobalRef<jobject> java_thread_; 53 }; 54 55 } // namespace android 56 } // namespace base 57 58 #endif // BASE_ANDROID_JAVA_HANDLER_THREAD_H_ 59
