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#include "base/android/java_handler_thread.h" 6 7#include <jni.h> 8 9#include "base/android/jni_android.h" 10#include "base/android/jni_string.h" 11#include "base/message_loop/message_loop.h" 12#include "base/synchronization/waitable_event.h" 13#include "base/threading/thread_restrictions.h" 14#include "jni/JavaHandlerThread_jni.h" 15 16namespace base { 17 18namespace android { 19 20JavaHandlerThread::JavaHandlerThread(const char* name) { 21 JNIEnv* env = base::android::AttachCurrentThread(); 22 23 java_thread_.Reset( 24 Java_JavaHandlerThread_create(env, ConvertUTF8ToJavaString(env, name))); 25} 26 27JavaHandlerThread::~JavaHandlerThread() { 28} 29 30void JavaHandlerThread::Start() { 31 // Check the thread has not already been started. 32 DCHECK(!message_loop_); 33 34 JNIEnv* env = base::android::AttachCurrentThread(); 35 base::WaitableEvent initialize_event( 36 WaitableEvent::ResetPolicy::AUTOMATIC, 37 WaitableEvent::InitialState::NOT_SIGNALED); 38 Java_JavaHandlerThread_start(env, java_thread_, 39 reinterpret_cast<intptr_t>(this), 40 reinterpret_cast<intptr_t>(&initialize_event)); 41 // Wait for thread to be initialized so it is ready to be used when Start 42 // returns. 43 base::ThreadRestrictions::ScopedAllowWait wait_allowed; 44 initialize_event.Wait(); 45} 46 47void JavaHandlerThread::Stop() { 48 JNIEnv* env = base::android::AttachCurrentThread(); 49 base::WaitableEvent shutdown_event(WaitableEvent::ResetPolicy::AUTOMATIC, 50 WaitableEvent::InitialState::NOT_SIGNALED); 51 Java_JavaHandlerThread_stop(env, java_thread_, 52 reinterpret_cast<intptr_t>(this), 53 reinterpret_cast<intptr_t>(&shutdown_event)); 54 // Wait for thread to shut down before returning. 55 base::ThreadRestrictions::ScopedAllowWait wait_allowed; 56 shutdown_event.Wait(); 57} 58 59void JavaHandlerThread::InitializeThread(JNIEnv* env, 60 const JavaParamRef<jobject>& obj, 61 jlong event) { 62 // TYPE_JAVA to get the Android java style message loop. 63 message_loop_.reset(new base::MessageLoop(base::MessageLoop::TYPE_JAVA)); 64 StartMessageLoop(); 65 reinterpret_cast<base::WaitableEvent*>(event)->Signal(); 66} 67 68void JavaHandlerThread::StopThread(JNIEnv* env, 69 const JavaParamRef<jobject>& obj, 70 jlong event) { 71 StopMessageLoop(); 72 reinterpret_cast<base::WaitableEvent*>(event)->Signal(); 73} 74 75void JavaHandlerThread::StartMessageLoop() { 76 static_cast<MessageLoopForUI*>(message_loop_.get())->Start(); 77} 78 79void JavaHandlerThread::StopMessageLoop() { 80 static_cast<MessageLoopForUI*>(message_loop_.get())->QuitWhenIdle(); 81} 82 83// static 84bool JavaHandlerThread::RegisterBindings(JNIEnv* env) { 85 return RegisterNativesImpl(env); 86} 87 88} // namespace android 89} // namespace base 90