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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_UniFFIResultPromise_h
#define mozilla_dom_UniFFIResultPromise_h
#include "nsThreadUtils.h"
#include "mozilla/MozPromise.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/UniFFIBinding.h"
namespace mozilla::uniffi {
extern mozilla::LazyLogModule gUniffiLogger;
class UniffiAsyncCallHandler;
class UniffiCallHandlerBase;
/**
* JS "bridge" for UniFFI
*
* This module intefaces with the SpiderMonkey JS API so that other code can
* focus on the core UniFFI logic.
*/
class ResultPromise {
public:
ResultPromise() = default;
// Initialize a ResultPromise, this must be done before calling any other
// methods.
//
// This must be called on the main thread.
void Init(const dom::GlobalObject& aGlobal, ErrorResult& aError);
// Get a raw `dom::Promise` pointer
//
// Use this to return the promise from a webidl-generated function.
// May only be called on the main thread.
dom::Promise* GetPromise() { return mPromise; }
// Complete the promise using a call handler, this can be called from any
// thread.
//
// After a promise is completed, it must not be used anymore.
void Complete(UniquePtr<UniffiCallHandlerBase> aHandler);
// Reject the promise with an unexpected error.
//
// Use this as a last resort, when something has gone very wrong in the FFI.
//
// After a promise is rejected, it must not be used anymore.
void RejectWithUnexpectedError();
private:
// The `nsMainThreadPtrHandle` ensures that if this type is destroyed
// from off-main-thread, it'll actually be released on the main thread.
// This is important because the promise is a main-thread-only object.
nsMainThreadPtrHandle<dom::Promise> mPromise;
};
} // namespace mozilla::uniffi
#endif // mozilla_dom_UniFFIResultPromise_h
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