1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/java_handler_thread.h"
#include <jni.h>
#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "base/base_jni/JavaHandlerThread_jni.h"
#include "base/functional/bind.h"
#include "base/message_loop/message_pump.h"
#include "base/message_loop/message_pump_type.h"
#include "base/run_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/sequence_manager/sequence_manager_impl.h"
#include "base/threading/platform_thread_internal_posix.h"
#include "base/threading/thread_id_name_manager.h"
#include "base/threading/thread_restrictions.h"
using base::android::AttachCurrentThread;
namespace base {
namespace android {
JavaHandlerThread::JavaHandlerThread(const char* name,
base::ThreadType thread_type)
: JavaHandlerThread(
name,
Java_JavaHandlerThread_create(
AttachCurrentThread(),
ConvertUTF8ToJavaString(AttachCurrentThread(), name),
base::internal::ThreadTypeToNiceValue(thread_type))) {}
JavaHandlerThread::JavaHandlerThread(
const char* name,
const base::android::ScopedJavaLocalRef<jobject>& obj)
: name_(name), java_thread_(obj) {}
JavaHandlerThread::~JavaHandlerThread() {
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(!Java_JavaHandlerThread_isAlive(env, java_thread_));
DCHECK(!state_ || state_->pump->IsAborted());
// TODO(mthiesse): We shouldn't leak the MessageLoop as this could affect
// future tests.
if (state_ && state_->pump->IsAborted()) {
// When the Pump has been aborted due to a crash, we intentionally leak the
// SequenceManager because the SequenceManager hasn't been shut down
// properly and would trigger DCHECKS. This should only happen in tests,
// where we handle the exception instead of letting it take down the
// process.
state_.release();
}
}
void JavaHandlerThread::Start() {
// Check the thread has not already been started.
DCHECK(!state_);
JNIEnv* env = base::android::AttachCurrentThread();
base::WaitableEvent initialize_event(
WaitableEvent::ResetPolicy::AUTOMATIC,
WaitableEvent::InitialState::NOT_SIGNALED);
Java_JavaHandlerThread_startAndInitialize(
env, java_thread_, reinterpret_cast<intptr_t>(this),
reinterpret_cast<intptr_t>(&initialize_event));
// Wait for thread to be initialized so it is ready to be used when Start
// returns.
base::ScopedAllowBaseSyncPrimitivesOutsideBlockingScope wait_allowed;
initialize_event.Wait();
}
void JavaHandlerThread::Stop() {
DCHECK(!task_runner()->BelongsToCurrentThread());
task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&JavaHandlerThread::StopOnThread, base::Unretained(this)));
JNIEnv* env = base::android::AttachCurrentThread();
Java_JavaHandlerThread_joinThread(env, java_thread_);
}
void JavaHandlerThread::InitializeThread(JNIEnv* env,
jlong event) {
base::ThreadIdNameManager::GetInstance()->RegisterThread(
base::PlatformThread::CurrentHandle().platform_handle(),
base::PlatformThread::CurrentId());
if (name_)
PlatformThread::SetName(name_);
thread_id_ = base::PlatformThread::CurrentId();
state_ = std::make_unique<State>();
#if DCHECK_IS_ON()
initialized_ = true;
#endif
Init();
reinterpret_cast<base::WaitableEvent*>(event)->Signal();
}
void JavaHandlerThread::OnLooperStopped(JNIEnv* env) {
DCHECK(task_runner()->BelongsToCurrentThread());
state_.reset();
CleanUp();
base::ThreadIdNameManager::GetInstance()->RemoveName(
base::PlatformThread::CurrentHandle().platform_handle(),
base::PlatformThread::CurrentId());
}
void JavaHandlerThread::StopSequenceManagerForTesting() {
DCHECK(task_runner()->BelongsToCurrentThread());
StopOnThread();
}
void JavaHandlerThread::JoinForTesting() {
DCHECK(!task_runner()->BelongsToCurrentThread());
JNIEnv* env = base::android::AttachCurrentThread();
Java_JavaHandlerThread_joinThread(env, java_thread_);
}
void JavaHandlerThread::ListenForUncaughtExceptionsForTesting() {
DCHECK(!task_runner()->BelongsToCurrentThread());
JNIEnv* env = base::android::AttachCurrentThread();
Java_JavaHandlerThread_listenForUncaughtExceptionsForTesting(env,
java_thread_);
}
ScopedJavaLocalRef<jthrowable> JavaHandlerThread::GetUncaughtExceptionIfAny() {
DCHECK(!task_runner()->BelongsToCurrentThread());
JNIEnv* env = base::android::AttachCurrentThread();
return Java_JavaHandlerThread_getUncaughtExceptionIfAny(env, java_thread_);
}
PlatformThreadId JavaHandlerThread::GetThreadId() const {
#if DCHECK_IS_ON()
DCHECK(initialized_);
#endif
return thread_id_;
}
void JavaHandlerThread::StopOnThread() {
DCHECK(task_runner()->BelongsToCurrentThread());
DCHECK(state_);
state_->pump->QuitWhenIdle(base::BindOnce(
&JavaHandlerThread::QuitThreadSafely, base::Unretained(this)));
}
void JavaHandlerThread::QuitThreadSafely() {
DCHECK(task_runner()->BelongsToCurrentThread());
JNIEnv* env = base::android::AttachCurrentThread();
Java_JavaHandlerThread_quitThreadSafely(env, java_thread_,
reinterpret_cast<intptr_t>(this));
}
JavaHandlerThread::State::State()
: sequence_manager(sequence_manager::CreateUnboundSequenceManager(
sequence_manager::SequenceManager::Settings::Builder()
.SetMessagePumpType(base::MessagePumpType::JAVA)
.Build())),
default_task_queue(
sequence_manager->CreateTaskQueue(sequence_manager::TaskQueue::Spec(
sequence_manager::QueueName::DEFAULT_TQ))) {
// TYPE_JAVA to get the Android java style message loop.
std::unique_ptr<MessagePump> message_pump =
MessagePump::Create(base::MessagePumpType::JAVA);
pump = static_cast<MessagePumpForUI*>(message_pump.get());
// We must set SetTaskRunner before binding because the Android UI pump
// creates a RunLoop which samples SingleThreadTaskRunner::GetCurrentDefault.
static_cast<sequence_manager::internal::SequenceManagerImpl*>(
sequence_manager.get())
->SetTaskRunner(default_task_queue->task_runner());
sequence_manager->BindToMessagePump(std::move(message_pump));
}
JavaHandlerThread::State::~State() = default;
} // namespace android
} // namespace base
|
