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
16 namespace base {
17
18 namespace android {
19
JavaHandlerThread(const char * name)20 JavaHandlerThread::JavaHandlerThread(const char* name) {
21 JNIEnv* env = base::android::AttachCurrentThread();
22
23 java_thread_.Reset(Java_JavaHandlerThread_create(
24 env, ConvertUTF8ToJavaString(env, name).obj()));
25 }
26
~JavaHandlerThread()27 JavaHandlerThread::~JavaHandlerThread() {
28 }
29
Start()30 void 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,
39 java_thread_.obj(),
40 reinterpret_cast<intptr_t>(this),
41 reinterpret_cast<intptr_t>(&initialize_event));
42 // Wait for thread to be initialized so it is ready to be used when Start
43 // returns.
44 base::ThreadRestrictions::ScopedAllowWait wait_allowed;
45 initialize_event.Wait();
46 }
47
Stop()48 void JavaHandlerThread::Stop() {
49 JNIEnv* env = base::android::AttachCurrentThread();
50 base::WaitableEvent shutdown_event(WaitableEvent::ResetPolicy::AUTOMATIC,
51 WaitableEvent::InitialState::NOT_SIGNALED);
52 Java_JavaHandlerThread_stop(env,
53 java_thread_.obj(),
54 reinterpret_cast<intptr_t>(this),
55 reinterpret_cast<intptr_t>(&shutdown_event));
56 // Wait for thread to shut down before returning.
57 base::ThreadRestrictions::ScopedAllowWait wait_allowed;
58 shutdown_event.Wait();
59 }
60
InitializeThread(JNIEnv * env,const JavaParamRef<jobject> & obj,jlong event)61 void JavaHandlerThread::InitializeThread(JNIEnv* env,
62 const JavaParamRef<jobject>& obj,
63 jlong event) {
64 // TYPE_JAVA to get the Android java style message loop.
65 message_loop_.reset(new base::MessageLoop(base::MessageLoop::TYPE_JAVA));
66 static_cast<MessageLoopForUI*>(message_loop_.get())->Start();
67 reinterpret_cast<base::WaitableEvent*>(event)->Signal();
68 }
69
StopThread(JNIEnv * env,const JavaParamRef<jobject> & obj,jlong event)70 void JavaHandlerThread::StopThread(JNIEnv* env,
71 const JavaParamRef<jobject>& obj,
72 jlong event) {
73 static_cast<MessageLoopForUI*>(message_loop_.get())->QuitWhenIdle();
74 reinterpret_cast<base::WaitableEvent*>(event)->Signal();
75 }
76
77 // static
RegisterBindings(JNIEnv * env)78 bool JavaHandlerThread::RegisterBindings(JNIEnv* env) {
79 return RegisterNativesImpl(env);
80 }
81
82 } // namespace android
83 } // namespace base
84