• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 "gin/modules/timer.h"
6 
7 #include "base/bind.h"
8 #include "gin/object_template_builder.h"
9 #include "gin/per_context_data.h"
10 
11 namespace gin {
12 
13 namespace {
14 
GetHiddenPropertyName(v8::Isolate * isolate)15 v8::Handle<v8::String> GetHiddenPropertyName(v8::Isolate* isolate) {
16   return gin::StringToSymbol(isolate, "::gin::Timer");
17 }
18 
19 }  // namespace
20 
21 // Timer =======================================================================
22 
23 gin::WrapperInfo Timer::kWrapperInfo = { gin::kEmbedderNativeGin };
24 
25 // static
Create(TimerType type,v8::Isolate * isolate,int delay_ms,v8::Handle<v8::Function> function)26 Handle<Timer> Timer::Create(TimerType type, v8::Isolate* isolate, int delay_ms,
27                             v8::Handle<v8::Function> function) {
28   return CreateHandle(isolate, new Timer(isolate, type == TYPE_REPEATING,
29                                          delay_ms, function));
30 }
31 
GetObjectTemplateBuilder(v8::Isolate * isolate)32 ObjectTemplateBuilder Timer::GetObjectTemplateBuilder(v8::Isolate* isolate) {
33   // We use Unretained() here because we directly own timer_, so we know it will
34   // be alive when these methods are called.
35   return Wrappable<Timer>::GetObjectTemplateBuilder(isolate)
36       .SetMethod("cancel",
37                  base::Bind(&base::Timer::Stop, base::Unretained(&timer_)))
38       .SetMethod("reset",
39                  base::Bind(&base::Timer::Reset, base::Unretained(&timer_)));
40 }
41 
Timer(v8::Isolate * isolate,bool repeating,int delay_ms,v8::Handle<v8::Function> function)42 Timer::Timer(v8::Isolate* isolate, bool repeating, int delay_ms,
43              v8::Handle<v8::Function> function)
44     : timer_(false, repeating),
45       runner_(PerContextData::From(
46           isolate->GetCurrentContext())->runner()->GetWeakPtr()),
47       weak_factory_(this) {
48   GetWrapper(runner_->GetContextHolder()->isolate())->SetHiddenValue(
49       GetHiddenPropertyName(isolate), function);
50   timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(delay_ms),
51                base::Bind(&Timer::OnTimerFired, weak_factory_.GetWeakPtr()));
52 }
53 
~Timer()54 Timer::~Timer() {
55 }
56 
OnTimerFired()57 void Timer::OnTimerFired() {
58   // This can happen in spite of the weak callback because it is possible for
59   // a gin::Handle<> to keep this object alive past when the isolate it is part
60   // of is destroyed.
61   if (!runner_.get()) {
62     return;
63   }
64 
65   Runner::Scope scope(runner_.get());
66   v8::Isolate* isolate = runner_->GetContextHolder()->isolate();
67   v8::Handle<v8::Function> function = v8::Handle<v8::Function>::Cast(
68       GetWrapper(isolate)->GetHiddenValue(GetHiddenPropertyName(isolate)));
69   runner_->Call(function, v8::Undefined(isolate), 0, NULL);
70 }
71 
72 
73 // TimerModule =================================================================
74 
75 const char TimerModule::kName[] = "timer";
76 WrapperInfo TimerModule::kWrapperInfo = { kEmbedderNativeGin };
77 
78 // static
Create(v8::Isolate * isolate)79 Handle<TimerModule> TimerModule::Create(v8::Isolate* isolate) {
80   return CreateHandle(isolate, new TimerModule());
81 }
82 
83 // static
GetModule(v8::Isolate * isolate)84 v8::Local<v8::Value> TimerModule::GetModule(v8::Isolate* isolate) {
85   return Create(isolate)->GetWrapper(isolate);
86 }
87 
TimerModule()88 TimerModule::TimerModule() {
89 }
90 
~TimerModule()91 TimerModule::~TimerModule() {
92 }
93 
GetObjectTemplateBuilder(v8::Isolate * isolate)94 ObjectTemplateBuilder TimerModule::GetObjectTemplateBuilder(
95     v8::Isolate* isolate) {
96   return Wrappable<TimerModule>::GetObjectTemplateBuilder(isolate)
97       .SetMethod("createOneShot",
98                  base::Bind(&Timer::Create, Timer::TYPE_ONE_SHOT))
99       .SetMethod("createRepeating",
100                  base::Bind(&Timer::Create, Timer::TYPE_REPEATING));
101 }
102 
103 }  // namespace gin
104