dom/quota/PromiseUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/quota/PromiseUtils.h"
   8
   9 #include "jsapi.h"
  10 #include "MainThreadUtils.h"
  11 #include "nsDebug.h"
  12 #include "xpcpublic.h"
  13 #include "mozilla/Assertions.h"
  14 #include "mozilla/ErrorResult.h"
  15 #include "mozilla/RefPtr.h"
  16 #include "mozilla/dom/Promise.h"
  17
  18 namespace mozilla::dom::quota {
  19
  20 nsresult CreatePromise(JSContext* aContext, Promise** aPromise) {
  21   MOZ_ASSERT(NS_IsMainThread());
  22   MOZ_ASSERT(aContext);
  23
  24   nsIGlobalObject* global =
  25       xpc::NativeGlobal(JS::CurrentGlobalOrNull(aContext));
  26   if (NS_WARN_IF(!global)) {
  27     return NS_ERROR_FAILURE;
  28   }
  29
  30   ErrorResult result;
  31   RefPtr<Promise> promise = Promise::Create(global, result);
  32   if (result.Failed()) {
  33     return result.StealNSResult();
  34   }
  35
  36   promise.forget(aPromise);
  37   return NS_OK;
  38 }
  39
  40 }  // namespace mozilla::dom::quota