public:

static void Initialize(v8::Handle<v8::Object> target);

protected:

static v8::Persistent<v8::FunctionTemplate> constructor_template;

IOWatcher() : ObjectWrap() {

ev_init(&watcher_, IOWatcher::Callback);

watcher_.data = this;

}

~IOWatcher() {

ev_io_stop(EV_DEFAULT_UC_ &watcher_);

assert(!ev_is_active(&watcher_));

assert(!ev_is_pending(&watcher_));

}

static v8::Handle<v8::Value> New(const v8::Arguments& args);

static v8::Handle<v8::Value> Flush(const v8::Arguments& args);

static v8::Handle<v8::Value> Start(const v8::Arguments& args);

static v8::Handle<v8::Value> Stop(const v8::Arguments& args);

static v8::Handle<v8::Value> Set(const v8::Arguments& args);

private:

static void Callback(EV_P_ ev_io *watcher, int revents);

static void Dump(EV_P_ ev_prepare *watcher, int revents);

static void Dump();

void Start();

void Stop();

// stats. TODO: expose to js, add reset() method

uint64_t dumps_;

ev_tstamp last_dump_;

ev_io watcher_;