// 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 "async-wrap.h"

#include "async-wrap-inl.h"

#include "env.h"

#include "env-inl.h"

#include "handle_wrap.h"

#include "util.h"

#include "util-inl.h"

#include "v8.h"

namespace node {

using v8::Context;

using v8::FunctionCallbackInfo;

using v8::FunctionTemplate;

using v8::HandleScope;

using v8::Integer;

using v8::Local;

using v8::Object;

using v8::Value;

namespace {

class SignalWrap : public HandleWrap {

public:

static void Initialize(Local<Object> target,

Local<Value> unused,

Local<Context> context) {

Environment* env = Environment::GetCurrent(context);

Local<FunctionTemplate> constructor = env->NewFunctionTemplate(New);

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

constructor->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Signal"));

env->SetProtoMethod(constructor, "close", HandleWrap::Close);

env->SetProtoMethod(constructor, "ref", HandleWrap::Ref);

env->SetProtoMethod(constructor, "unref", HandleWrap::Unref);

env->SetProtoMethod(constructor, "hasRef", HandleWrap::HasRef);

env->SetProtoMethod(constructor, "start", Start);

env->SetProtoMethod(constructor, "stop", Stop);

target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "Signal"),

constructor->GetFunction());

}

size_t self_size() const override { return sizeof(*this); }

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.

CHECK(args.IsConstructCall());

Environment* env = Environment::GetCurrent(args);

new SignalWrap(env, args.This());

}

SignalWrap(Environment* env, Local<Object> object)

: HandleWrap(env,

object,

reinterpret_cast<uv_handle_t*>(&handle_),

AsyncWrap::PROVIDER_SIGNALWRAP) {

int r = uv_signal_init(env->event_loop(), &handle_);

CHECK_EQ(r, 0);

}

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

SignalWrap* wrap;

ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());

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

#if defined(__POSIX__) && HAVE_INSPECTOR

if (signum == SIGPROF) {

Environment* env = Environment::GetCurrent(args);

if (env->inspector_agent()->IsStarted()) {

fprintf(stderr, "process.on(SIGPROF) is reserved while debugging\n");

return;

}

}

#endif

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

args.GetReturnValue().Set(err);

}

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

SignalWrap* wrap;

ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());

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

args.GetReturnValue().Set(err);

}

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

SignalWrap* wrap = ContainerOf(&SignalWrap::handle_, handle);

Environment* env = wrap->env();

HandleScope handle_scope(env->isolate());

Context::Scope context_scope(env->context());

Local<Value> arg = Integer::New(env->isolate(), signum);

wrap->MakeCallback(env->onsignal_string(), 1, &arg);

}

uv_signal_t handle_;

};

} // anonymous namespace

} // namespace node

NODE_MODULE_CONTEXT_AWARE_BUILTIN(signal_wrap, node::SignalWrap::Initialize)