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https://github.com/nodejs/node-v0.x-archive.git
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baed9d514d
This is sloppy: after each ObjectWrap allocation the user needs to call ObjectWrap::InformV8ofAllocation(). In addition each class deriving from ObjectWrap needs to implement the virtual method size() which should return the size of the derived class. If I was better at C++ I could possibly make this less ugly. For now this is how it is. Memory usage looks much better after this commit.
106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
#include "node.h"
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#include "timer.h"
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#include <assert.h>
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using namespace v8;
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using namespace node;
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#define CALLBACK_SYMBOL String::NewSymbol("callback")
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Persistent<FunctionTemplate> Timer::constructor_template;
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void
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Timer::Initialize (Handle<Object> target)
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{
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HandleScope scope;
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Local<FunctionTemplate> t = FunctionTemplate::New(Timer::New);
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constructor_template = Persistent<FunctionTemplate>::New(t);
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constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
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NODE_SET_PROTOTYPE_METHOD(constructor_template, "start", Timer::Start);
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NODE_SET_PROTOTYPE_METHOD(constructor_template, "stop", Timer::Stop);
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target->Set(String::NewSymbol("Timer"), constructor_template->GetFunction());
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}
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void
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Timer::OnTimeout (EV_P_ ev_timer *watcher, int revents)
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{
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Timer *timer = static_cast<Timer*>(watcher->data);
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HandleScope scope;
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Local<Value> callback_value = timer->handle_->GetHiddenValue(CALLBACK_SYMBOL);
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if (!callback_value->IsFunction())
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return;
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Local<Function> callback = Local<Function>::Cast(callback_value);
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TryCatch try_catch;
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callback->Call (timer->handle_, 0, NULL);
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if (try_catch.HasCaught())
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fatal_exception(try_catch);
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/* XXX i'm a bit worried if this is the correct test?
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* it's rather crutial for memory leaks the conditional here test to see
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* if the watcher will make another callback.
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*/
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if (!ev_is_active(&timer->watcher_))
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timer->Detach();
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}
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Timer::Timer (Handle<Object> handle, Handle<Function> callback, ev_tstamp after, ev_tstamp repeat)
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: ObjectWrap(handle)
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{
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HandleScope scope;
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handle_->SetHiddenValue(CALLBACK_SYMBOL, callback);
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ev_timer_init(&watcher_, Timer::OnTimeout, after, repeat);
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watcher_.data = this;
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}
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Timer::~Timer ()
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{
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ev_timer_stop (EV_DEFAULT_UC_ &watcher_);
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}
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Handle<Value>
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Timer::New (const Arguments& args)
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{
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if (args.Length() < 2)
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return Undefined();
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HandleScope scope;
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Local<Function> callback = Local<Function>::Cast(args[0]);
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ev_tstamp after = (double)(args[1]->IntegerValue()) / 1000.0;
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ev_tstamp repeat = (double)(args[2]->IntegerValue()) / 1000.0;
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Timer *t = new Timer(args.Holder(), callback, after, repeat);
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ObjectWrap::InformV8ofAllocation(t);
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return args.This();
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}
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Handle<Value>
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Timer::Start (const Arguments& args)
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{
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Timer *timer = NODE_UNWRAP(Timer, args.Holder());
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ev_timer_start(EV_DEFAULT_UC_ &timer->watcher_);
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timer->Attach();
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return Undefined();
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}
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Handle<Value>
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Timer::Stop (const Arguments& args)
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{
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Timer *timer = NODE_UNWRAP(Timer, args.Holder());
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ev_timer_stop(EV_DEFAULT_UC_ &timer->watcher_);
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timer->Detach();
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return Undefined();
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}
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