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 class WaitableEvent; 18 19 namespace android { 20 21 // A Java Thread with a native message loop. To run tasks, post them 22 // to the message loop and they will be scheduled along with Java tasks 23 // on the thread. 24 // This is useful for callbacks where the receiver expects a thread 25 // with a prepared Looper. 26 class BASE_EXPORT JavaHandlerThread { 27 public: 28 JavaHandlerThread(const char* name); 29 virtual ~JavaHandlerThread(); 30 message_loop()31 base::MessageLoop* message_loop() const { return message_loop_.get(); } 32 void Start(); 33 void Stop(); 34 35 // Called from java on the newly created thread. 36 // Start() will not return before this methods has finished. 37 void InitializeThread(JNIEnv* env, 38 const JavaParamRef<jobject>& obj, 39 jlong event); 40 void StopThread(JNIEnv* env, 41 const JavaParamRef<jobject>& obj, 42 jlong event); 43 44 static bool RegisterBindings(JNIEnv* env); 45 46 private: 47 std::unique_ptr<base::MessageLoop> message_loop_; 48 ScopedJavaGlobalRef<jobject> java_thread_; 49 }; 50 51 } // namespace android 52 } // namespace base 53 54 #endif // BASE_ANDROID_JAVA_HANDLER_THREAD_H_ 55