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#include "node.h"
#include "timers.h"
#include <assert.h>
using namespace v8;
class Timer {
public:
Timer(Handle<Function> callback, int argc, Handle<Value> argv[], ev_tstamp after, ev_tstamp repeat);
~Timer();
Local<External> CreateTimeoutID ();
void CallCallback ();
private:
ev_timer watcher;
Persistent<External> timeoutID;
Persistent<Function> callback;
int argc;
Persistent<Value> argv[];
};
static void
onTimeout (struct ev_loop *loop, ev_timer *watcher, int revents)
{
Timer *timer = static_cast<Timer*>(watcher->data);
timer->CallCallback();
// use ev_is_active instead?
if(watcher->repeat == 0.)
delete timer;
}
Timer::Timer (Handle<Function> _callback, int _argc, Handle<Value> _argv[], ev_tstamp after, ev_tstamp repeat)
{
HandleScope scope;
callback = Persistent<Function>::New(_callback);
argc = _argc;
ev_timer_init (&watcher, onTimeout, after, repeat);
watcher.data = this;
ev_timer_start (node_loop(), &watcher);
}
Timer::~Timer ()
{
ev_timer_stop (node_loop(), &watcher);
callback.Dispose();
timeoutID.Dispose();
timeoutID.Clear();
}
void
Timer::CallCallback ()
{
HandleScope scope;
TryCatch try_catch;
callback->Call (Context::GetCurrent()->Global(), argc, argv);
if(try_catch.HasCaught())
node_fatal_exception(try_catch);
}
Local<External>
Timer::CreateTimeoutID ()
{
HandleScope scope;
Local<External> timeoutID_local = External::New(this);
timeoutID = Persistent<External>::New(timeoutID_local);
return scope.Close(timeoutID_local);
}
static Timer *
UnwrapTimeoutID (Handle<External> timeoutID)
{
HandleScope scope;
Timer *timer = static_cast<Timer*>(timeoutID->Value());
return timer;
}
// timeoutID = setTimeout(func, delay, [param1, param2, ...]);
// timeoutID = setTimeout(code, delay);
//
// * timeoutID is the ID of the timeout, which can be used with
// clearTimeout.
//
// * func is the function you want to execute after delay milliseconds.
//
// * code in the alternate syntax, is a string of code you want to execute
// after delay milliseconds. (not recommended)
//
// * delay is the number of milliseconds (thousandths of a second) that the
// function call should be delayed by.
NODE_METHOD(setTimeout)
{
if (args.Length() < 2)
return Undefined();
HandleScope scope;
Local<Function> callback = Local<Function>::Cast(args[0]);
int delay = args[1]->IntegerValue();
ev_tstamp after = (double)delay / 1000.0;
if (args.Length() > 2)
assert(0 && "extra params to setTimeout not yet implemented.");
int argc = 0;
Handle<Value> argv[] = {};
/*
int argc = args.Length() - 2;
Handle<Value> argv[] = new Handle<Value>[argc];
// the rest of the arguments, if any arg parameters for the callback
for(int i = 2; i < args.Length(); i++)
argv[i - 2] = args[i];
*/
Timer *timer = new Timer(callback, argc, argv, after, 0.0);
Local<External> timeoutID = timer->CreateTimeoutID();
return scope.Close(timeoutID);
}
// clearTimeout(timeoutID)
NODE_METHOD(clearTimeout)
{
if (args.Length() < 1)
return Undefined();
Handle<External> timeoutID = Handle<External>::Cast(args[0]);
Timer *timer = UnwrapTimeoutID(timeoutID);
delete timer;
return Undefined();
}
// intervalID = setInterval(func, delay[, param1, param2, ...]);
// intervalID = setInterval(code, delay);
//
// where
//
// * intervalID is a unique interval ID you can pass to clearInterval().
//
// * func is the function you want to be called repeatedly.
//
// * code in the alternate syntax, is a string of code you want to be executed
// repeatedly.
//
// * delay is the number of milliseconds (thousandths of a second) that the
// setInterval() function should wait before each call to func.
NODE_METHOD(setInterval)
{
if (args.Length() < 2)
return Undefined();
HandleScope scope;
Local<Function> callback = Local<Function>::Cast(args[0]);
int delay = args[1]->IntegerValue();
ev_tstamp after = (double)delay / 1000.0;
if (args.Length() > 2)
assert(0 && "extra params to setInterval not yet implemented.");
int argc = 0;
Handle<Value> argv[] = {};
Timer *timer = new Timer(callback, argc, argv, after, after);
Local<External> timeoutID = timer->CreateTimeoutID();
return scope.Close(timeoutID);
}
void
NodeInit_timers (Handle<Object> target)
{
HandleScope scope;
NODE_SET_METHOD(target, "setTimeout", setTimeout);
NODE_SET_METHOD(target, "clearTimeout", clearTimeout);
NODE_SET_METHOD(target, "setInterval", setInterval);
NODE_SET_METHOD(target, "clearInterval", clearTimeout);
}
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