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
|
#include <node.h>
#include <node_timer.h>
#include <assert.h>
using namespace v8;
using namespace node;
Persistent<FunctionTemplate> Timer::constructor_template;
static Persistent<String> timeout_symbol;
static Persistent<String> repeat_symbol;
static Persistent<String> callback_symbol;
void
Timer::Initialize (Handle<Object> target)
{
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(Timer::New);
constructor_template = Persistent<FunctionTemplate>::New(t);
constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
constructor_template->SetClassName(String::NewSymbol("Timer"));
timeout_symbol = NODE_PSYMBOL("timeout");
repeat_symbol = NODE_PSYMBOL("repeat");
callback_symbol = NODE_PSYMBOL("callback");
NODE_SET_PROTOTYPE_METHOD(constructor_template, "start", Timer::Start);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "stop", Timer::Stop);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "again", Timer::Again);
constructor_template->InstanceTemplate()->SetAccessor(repeat_symbol,
RepeatGetter, RepeatSetter);
target->Set(String::NewSymbol("Timer"), constructor_template->GetFunction());
}
Handle<Value>
Timer::RepeatGetter (Local<String> property, const AccessorInfo& info)
{
HandleScope scope;
Timer *timer = ObjectWrap::Unwrap<Timer>(info.This());
assert(timer);
assert (property == repeat_symbol);
Local<Integer> v = Integer::New(timer->watcher_.repeat);
return scope.Close(v);
}
void
Timer::RepeatSetter (Local<String> property, Local<Value> value, const AccessorInfo& info)
{
HandleScope scope;
Timer *timer = ObjectWrap::Unwrap<Timer>(info.This());
assert(timer);
assert(property == repeat_symbol);
timer->watcher_.repeat = NODE_V8_UNIXTIME(value);
}
void
Timer::OnTimeout (EV_P_ ev_timer *watcher, int revents)
{
Timer *timer = static_cast<Timer*>(watcher->data);
assert(revents == EV_TIMEOUT);
HandleScope scope;
Local<Value> callback_v = timer->handle_->Get(callback_symbol);
if (!callback_v->IsFunction()) {
timer->Stop();
return;
}
Local<Function> callback = Local<Function>::Cast(callback_v);
TryCatch try_catch;
callback->Call(timer->handle_, 0, NULL);
if (try_catch.HasCaught()) {
FatalException(try_catch);
}
if (timer->watcher_.repeat == 0) timer->Unref();
}
Timer::~Timer ()
{
ev_timer_stop(EV_DEFAULT_UC_ &watcher_);
}
Handle<Value>
Timer::New (const Arguments& args)
{
if (!args.IsConstructCall()) {
return FromConstructorTemplate(constructor_template, args);
}
HandleScope scope;
Timer *t = new Timer();
t->Wrap(args.Holder());
return args.This();
}
Handle<Value>
Timer::Start (const Arguments& args)
{
HandleScope scope;
Timer *timer = ObjectWrap::Unwrap<Timer>(args.Holder());
if (args.Length() != 2)
return ThrowException(String::New("Bad arguments"));
bool was_active = ev_is_active(&timer->watcher_);
ev_tstamp after = NODE_V8_UNIXTIME(args[0]);
ev_tstamp repeat = NODE_V8_UNIXTIME(args[1]);
ev_timer_init(&timer->watcher_, Timer::OnTimeout, after, repeat);
timer->watcher_.data = timer;
// Update the event loop time. Need to call this because processing JS can
// take non-negligible amounts of time.
ev_now_update(EV_DEFAULT_UC);
ev_timer_start(EV_DEFAULT_UC_ &timer->watcher_);
if (!was_active) timer->Ref();
return Undefined();
}
Handle<Value> Timer::Stop(const Arguments& args) {
HandleScope scope;
Timer *timer = ObjectWrap::Unwrap<Timer>(args.Holder());
timer->Stop();
return Undefined();
}
void Timer::Stop () {
if (watcher_.active) {
ev_timer_stop(EV_DEFAULT_UC_ &watcher_);
Unref();
}
}
Handle<Value> Timer::Again(const Arguments& args) {
HandleScope scope;
Timer *timer = ObjectWrap::Unwrap<Timer>(args.Holder());
int was_active = ev_is_active(&timer->watcher_);
if (args.Length() > 0) {
ev_tstamp repeat = NODE_V8_UNIXTIME(args[0]);
if (repeat > 0) timer->watcher_.repeat = repeat;
}
ev_timer_again(EV_DEFAULT_UC_ &timer->watcher_);
// ev_timer_again can start or stop the watcher.
// So we need to check what happened and adjust the ref count
// appropriately.
if (ev_is_active(&timer->watcher_)) {
if (!was_active) timer->Ref();
} else {
if (was_active) timer->Unref();
}
return Undefined();
}
|