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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// An implementation of WebThread in terms of base::MessageLoop and
// base::Thread
#include "webkit/glue/webthread_impl.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/message_loop.h"
#include "base/pending_task.h"
#include "base/threading/platform_thread.h"
namespace webkit_glue {
WebThreadBase::WebThreadBase() { }
WebThreadBase::~WebThreadBase() { }
class WebThreadBase::TaskObserverAdapter :
public base::MessageLoop::TaskObserver {
public:
TaskObserverAdapter(WebThread::TaskObserver* observer)
: observer_(observer) { }
virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
observer_->willProcessTask();
}
virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
observer_->didProcessTask();
}
private:
WebThread::TaskObserver* observer_;
};
void WebThreadBase::addTaskObserver(TaskObserver* observer) {
CHECK(isCurrentThread());
std::pair<TaskObserverMap::iterator, bool> result = task_observer_map_.insert(
std::make_pair(observer, static_cast<TaskObserverAdapter*>(NULL)));
if (result.second)
result.first->second = new TaskObserverAdapter(observer);
base::MessageLoop::current()->AddTaskObserver(result.first->second);
}
void WebThreadBase::removeTaskObserver(TaskObserver* observer) {
CHECK(isCurrentThread());
TaskObserverMap::iterator iter = task_observer_map_.find(observer);
if (iter == task_observer_map_.end())
return;
base::MessageLoop::current()->RemoveTaskObserver(iter->second);
delete iter->second;
task_observer_map_.erase(iter);
}
WebThreadImpl::WebThreadImpl(const char* name)
: thread_(new base::Thread(name)) {
thread_->Start();
}
void WebThreadImpl::postTask(Task* task) {
thread_->message_loop()->PostTask(
FROM_HERE, base::Bind(&WebKit::WebThread::Task::run, base::Owned(task)));
}
void WebThreadImpl::postDelayedTask(
Task* task, long long delay_ms) {
thread_->message_loop()->PostDelayedTask(
FROM_HERE,
base::Bind(&WebKit::WebThread::Task::run, base::Owned(task)),
base::TimeDelta::FromMilliseconds(delay_ms));
}
void WebThreadImpl::enterRunLoop() {
CHECK(isCurrentThread());
CHECK(!thread_->message_loop()->is_running()); // We don't support nesting.
thread_->message_loop()->Run();
}
void WebThreadImpl::exitRunLoop() {
CHECK(isCurrentThread());
CHECK(thread_->message_loop()->is_running());
thread_->message_loop()->Quit();
}
bool WebThreadImpl::isCurrentThread() const {
return thread_->thread_id() == base::PlatformThread::CurrentId();
}
WebThreadImpl::~WebThreadImpl() {
thread_->Stop();
}
WebThreadImplForMessageLoop::WebThreadImplForMessageLoop(
base::MessageLoopProxy* message_loop)
: message_loop_(message_loop) {
}
void WebThreadImplForMessageLoop::postTask(Task* task) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&WebKit::WebThread::Task::run, base::Owned(task)));
}
void WebThreadImplForMessageLoop::postDelayedTask(
Task* task, long long delay_ms) {
message_loop_->PostDelayedTask(
FROM_HERE,
base::Bind(&WebKit::WebThread::Task::run, base::Owned(task)),
base::TimeDelta::FromMilliseconds(delay_ms));
}
void WebThreadImplForMessageLoop::enterRunLoop() {
CHECK(isCurrentThread());
CHECK(!base::MessageLoop::current()
->is_running()); // We don't support nesting.
base::MessageLoop::current()->Run();
}
void WebThreadImplForMessageLoop::exitRunLoop() {
CHECK(isCurrentThread());
CHECK(base::MessageLoop::current()->is_running());
base::MessageLoop::current()->Quit();
}
bool WebThreadImplForMessageLoop::isCurrentThread() const {
return message_loop_->BelongsToCurrentThread();
}
WebThreadImplForMessageLoop::~WebThreadImplForMessageLoop() {
}
}
|
