Node.js - add constat values to exports of native addon

constants.cc

#define NODE_SET_MEMBER(target, name, value)                                            \
    do {                                                                                \
        v8::Isolate* isolate = target->GetIsolate();                                    \
        v8::Local<v8::Context> context = isolate->GetCurrentContext();                  \
        v8::Local<v8::String> constant_name = v8::String::NewFromUtf8(isolate, (name)); \
        (target)->Set(v8::Local<Value>::New(isolate,                                    \
                          v8::String::NewFromUtf8(isolate, name)),                      \
            value);                                                                     \
    } while (0)

#define DEFINE_CONSTANT(target, name, constant)                                                                        \
    do {                                                                                                               \
        v8::Isolate* isolate = target->GetIsolate();                                                                   \
        v8::Local<v8::Context> context = isolate->GetCurrentContext();                                                 \
        v8::Local<v8::String> constant_name = v8::String::NewFromUtf8(isolate, (name));                                \
        v8::Local<v8::Number> constant_value = v8::Number::New(isolate, static_cast<double>(constant));                \
        v8::PropertyAttribute constant_attributes = static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete); \
        (target)->DefineOwnProperty(context,                                                                           \
                    constant_name,                                                                                     \
                    constant_value,                                                                                    \
                    constant_attributes)                                                                               \
            .FromJust();                                                                                               \
    } while (0)


enum ServiceStatus {
    START_PENDING = 0x04,
    RUNNING = 0x03,
    STOP_PENDING = 0x02,
    STOPPED = 0x01,
};

void initializeModule(v8::Local<Object> exports) {
    v8::Local<Object> serviceStatus = v8::Object::New(isolate);
    DEFINE_CONSTANT(serviceStatus, "START_PENDING", ServiceStatus::START_PENDING);
    DEFINE_CONSTANT(serviceStatus, "RUNNING",       ServiceStatus::RUNNING);
    DEFINE_CONSTANT(serviceStatus, "STOP_PENDING",  ServiceStatus::STOP_PENDING);
    DEFINE_CONSTANT(serviceStatus, "STOPPED",       ServiceStatus::STOPPED);

    NODE_SET_MEMBER(exports, "ServiceStatus", serviceStatus);
}

NODE_MODULE(NODE_GYP_MODULE_NAME, initializeModule)