jiapengyu
47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
#ifndef PROMISE_COMPLETION
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#define PROMISE_COMPLETION
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#include <nan.h>
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#include "async_baton.h"
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// PromiseCompletion forwards either the resolved result or the rejection reason
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// to the native layer, once the promise completes
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//
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// inherits ObjectWrap so it can be used in v8 and managed by the garbage collector
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// it isn't wired up to be instantiated or accessed from the JS layer other than
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// for the purpose of promise result forwarding
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class PromiseCompletion : public Nan::ObjectWrap
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{
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// callback type called when a promise completes
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typedef void (*Callback) (bool isFulfilled, AsyncBaton *baton, v8::Local<v8::Value> resultOfPromise);
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static NAN_METHOD(New);
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static NAN_METHOD(PromiseFulfilled);
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static NAN_METHOD(PromiseRejected);
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// persistent handles for NAN_METHODs
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static Nan::Persistent<v8::Function> newFn;
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static Nan::Persistent<v8::Function> promiseFulfilled;
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static Nan::Persistent<v8::Function> promiseRejected;
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static v8::Local<v8::Value> Bind(Nan::Persistent<v8::Function> &method, v8::Local<v8::Object> object);
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static void CallCallback(bool isFulfilled, const Nan::FunctionCallbackInfo<v8::Value> &info);
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// callback and baton stored for the promise that this PromiseCompletion is
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// attached to. when the promise completes, the callback will be called with
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// the result, and the stored baton.
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Callback callback;
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AsyncBaton *baton;
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void Setup(v8::Local<v8::Function> thenFn, v8::Local<v8::Value> result, AsyncBaton *baton, Callback callback);
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public:
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// If result is a promise, this will instantiate a new PromiseCompletion
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// and have it forward the promise result / reason via the baton and callback
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static bool ForwardIfPromise(v8::Local<v8::Value> result, AsyncBaton *baton, Callback callback);
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static void InitializeComponent();
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};
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#endif
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