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promise.cc
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promise.cc
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#include "napi.h"
class PromiseWrap : public Napi::ObjectWrap<PromiseWrap> {
public:
static Napi::Object Init(Napi::Env env, Napi::Object exports);
PromiseWrap(const Napi::CallbackInfo& info);
~PromiseWrap();
Napi::Promise::Deferred* deferred;
private:
static Napi::FunctionReference constructor;
Napi::Value Resolve(const Napi::CallbackInfo& info);
Napi::Value Reject(const Napi::CallbackInfo& info);
};
Napi::FunctionReference PromiseWrap::constructor;
Napi::Object PromiseWrap::Init(Napi::Env env, Napi::Object exports) {
Napi::HandleScope scope(env);
Napi::Function func = DefineClass(env, "PromiseWrap", {
InstanceMethod("resolve", &PromiseWrap::Resolve),
InstanceMethod("reject", &PromiseWrap::Reject),
});
constructor = Napi::Persistent(func);
constructor.SuppressDestruct();
exports.Set("PromiseWrap", func);
return exports;
}
PromiseWrap::PromiseWrap(const Napi::CallbackInfo& info) : Napi::ObjectWrap<PromiseWrap>(info) {
const Napi::Env env = info.Env();
this->deferred = new Napi::Promise::Deferred(env);
Napi::Object obj = info.This().As<Napi::Object>();
obj.Set("promise", deferred->Promise());
}
PromiseWrap::~PromiseWrap() {
delete this->deferred;
}
Napi::Value PromiseWrap::Resolve(const Napi::CallbackInfo& info) {
const Napi::Env env = info.Env();
if (info.Length() != 1) {
Napi::TypeError::New(env, "Wrong number of arguments").ThrowAsJavaScriptException();
return env.Null();
}
deferred->Resolve(info[0]);
return info.This();
}
Napi::Value PromiseWrap::Reject(const Napi::CallbackInfo& info) {
const Napi::Env env = info.Env();
if (info.Length() != 1) {
Napi::TypeError::New(env, "Wrong number of arguments").ThrowAsJavaScriptException();
return env.Null();
}
deferred->Reject(info[0]);
return info.This();
}
Napi::Object Init(Napi::Env env, Napi::Object exports) {
return PromiseWrap::Init(env, exports);
}
NODE_API_MODULE(make_promise, Init)