node/src/node_timer.cc at master · ymd6/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#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

node/src/node_timer.cc at master · ymd6/node · GitHub

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