CSE2410 Fall 2014 Bounce

// 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 "handle_wrap.h"

namespace node {

using v8::Function;

using v8::FunctionCallbackInfo;

using v8::FunctionTemplate;

using v8::Handle;

using v8::HandleScope;

using v8::Integer;

using v8::Local;

using v8::Object;

using v8::String;

using v8::Value;

static Cached<String> onsignal_sym;

class SignalWrap : public HandleWrap {

 public:

  static void Initialize(Handle<Object> target) {

    HandleScope scope(node_isolate);

    HandleWrap::Initialize(target);

    Local<FunctionTemplate> constructor = FunctionTemplate::New(New);

    constructor->InstanceTemplate()->SetInternalFieldCount(1);

    constructor->SetClassName(String::NewSymbol("Signal"));

    NODE_SET_PROTOTYPE_METHOD(constructor, "close", HandleWrap::Close);

    NODE_SET_PROTOTYPE_METHOD(constructor, "ref", HandleWrap::Ref);

    NODE_SET_PROTOTYPE_METHOD(constructor, "unref", HandleWrap::Unref);

    NODE_SET_PROTOTYPE_METHOD(constructor, "start", Start);

    NODE_SET_PROTOTYPE_METHOD(constructor, "stop", Stop);

    onsignal_sym = String::New("onsignal");

    target->Set(String::NewSymbol("Signal"), constructor->GetFunction());

  }

 private:

  static void New(const FunctionCallbackInfo<Value>& args) {

    // This constructor should not be exposed to public javascript.

    // Therefore we assert that we are not trying to call this as a

    // normal function.

    assert(args.IsConstructCall());

    HandleScope scope(node_isolate);

    new SignalWrap(args.This());

  }

  explicit SignalWrap(Handle<Object> object)

      : HandleWrap(object, reinterpret_cast<uv_handle_t*>(&handle_)) {

    int r = uv_signal_init(uv_default_loop(), &handle_);

    assert(r == 0);

  }

  ~SignalWrap() {

  }

  static void Start(const FunctionCallbackInfo<Value>& args) {

    HandleScope scope(node_isolate);

    UNWRAP(SignalWrap)

    int signum = args[0]->Int32Value();

    int err = uv_signal_start(&wrap->handle_, OnSignal, signum);

    args.GetReturnValue().Set(err);

  }

  static void Stop(const FunctionCallbackInfo<Value>& args) {

    HandleScope scope(node_isolate);

    UNWRAP(SignalWrap)

    int err = uv_signal_stop(&wrap->handle_);

    args.GetReturnValue().Set(err);

  }

  static void OnSignal(uv_signal_t* handle, int signum) {

    HandleScope scope(node_isolate);

    SignalWrap* wrap = container_of(handle, SignalWrap, handle_);

    assert(wrap);

    Local<Value> argv[1] = { Integer::New(signum, node_isolate) };

    MakeCallback(wrap->object(), onsignal_sym, ARRAY_SIZE(argv), argv);

  }

  uv_signal_t handle_;

};

}  // namespace node

NODE_MODULE(node_signal_wrap, node::SignalWrap::Initialize)