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tag: v0.1.99
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// Copyright 2009 Ryan Dahl <ry@tinyclouds.org>
#include <node_io_watcher.h>
#include <node.h>
#include <v8.h>
#include <assert.h>
namespace node {
using namespace v8;
Persistent<FunctionTemplate> IOWatcher::constructor_template;
Persistent<String> callback_symbol;
void IOWatcher::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(IOWatcher::New);
constructor_template = Persistent<FunctionTemplate>::New(t);
constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
constructor_template->SetClassName(String::NewSymbol("IOWatcher"));
NODE_SET_PROTOTYPE_METHOD(constructor_template, "start", IOWatcher::Start);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "stop", IOWatcher::Stop);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "set", IOWatcher::Set);
target->Set(String::NewSymbol("IOWatcher"), constructor_template->GetFunction());
callback_symbol = NODE_PSYMBOL("callback");
}
void IOWatcher::Callback(EV_P_ ev_io *w, int revents) {
IOWatcher *io = static_cast<IOWatcher*>(w->data);
assert(w == &io->watcher_);
HandleScope scope;
Local<Value> callback_v = io->handle_->Get(callback_symbol);
if (!callback_v->IsFunction()) {
io->Stop();
return;
}
Local<Function> callback = Local<Function>::Cast(callback_v);
TryCatch try_catch;
Local<Value> argv[2];
argv[0] = Local<Value>::New(revents & EV_READ ? True() : False());
argv[1] = Local<Value>::New(revents & EV_WRITE ? True() : False());
io->Ref();
callback->Call(io->handle_, 2, argv);
io->Unref();
if (try_catch.HasCaught()) {
FatalException(try_catch);
}
}
//
// var io = new process.IOWatcher();
// process.callback = function (readable, writable) { ... };
// io.set(fd, true, false);
// io.start();
//
Handle<Value> IOWatcher::New(const Arguments& args) {
HandleScope scope;
IOWatcher *s = new IOWatcher();
s->Wrap(args.This());
return args.This();
}
Handle<Value> IOWatcher::Start(const Arguments& args) {
HandleScope scope;
IOWatcher *io = ObjectWrap::Unwrap<IOWatcher>(args.Holder());
io->Start();
return Undefined();
}
Handle<Value> IOWatcher::Stop(const Arguments& args) {
HandleScope scope;
IOWatcher *io = ObjectWrap::Unwrap<IOWatcher>(args.Holder());
io->Stop();
return Undefined();
}
void IOWatcher::Start() {
if (!ev_is_active(&watcher_)) {
ev_io_start(EV_DEFAULT_UC_ &watcher_);
Ref();
}
}
void IOWatcher::Stop() {
if (ev_is_active(&watcher_)) {
ev_io_stop(EV_DEFAULT_UC_ &watcher_);
Unref();
}
}
Handle<Value> IOWatcher::Set(const Arguments& args) {
HandleScope scope;
IOWatcher *io = ObjectWrap::Unwrap<IOWatcher>(args.Holder());
if (!args[0]->IsInt32()) {
return ThrowException(Exception::TypeError(
String::New("First arg should be a file descriptor.")));
}
int fd = args[0]->Int32Value();
if (!args[1]->IsBoolean()) {
return ThrowException(Exception::TypeError(
String::New("Second arg should boolean (readable).")));
}
int events = 0;
if (args[1]->IsTrue()) events |= EV_READ;
if (!args[2]->IsBoolean()) {
return ThrowException(Exception::TypeError(
String::New("Third arg should boolean (writable).")));
}
if (args[2]->IsTrue()) events |= EV_WRITE;
ev_io_set(&io->watcher_, fd, events);
return Undefined();
}
} // namespace node
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