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Copy pathnode_timer.cc
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179 lines (121 loc) · 4.32 KB
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#include <node.h>
#include <node_timer.h>
#include <assert.h>
namespace node {
using namespace v8;
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();
}
} // namespace node