dom/quota/NotifyUtilsCommon.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=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/NotifyUtilsCommon.h"
   8
   9 #include "mozilla/Services.h"
  10 #include "mozilla/dom/quota/QuotaCommon.h"
  11 #include "mozilla/dom/quota/ResultExtensions.h"
  12 #include "nsCOMPtr.h"
  13 #include "nsError.h"
  14 #include "nsIObserverService.h"
  15 #include "nsThreadUtils.h"
  16
  17 namespace mozilla::dom::quota {
  18
  19 void NotifyObserversOnMainThread(
  20     const char* aTopic,
  21     std::function<already_AddRefed<nsISupports>()>&& aSubjectGetter) {
  22   auto mainThreadFunction = [topic = aTopic,
  23                              subjectGetter = std::move(aSubjectGetter)]() {
  24     nsCOMPtr<nsIObserverService> observerService =
  25         mozilla::services::GetObserverService();
  26     QM_TRY(MOZ_TO_RESULT(observerService), QM_VOID);
  27
  28     nsCOMPtr<nsISupports> subject;
  29     if (subjectGetter) {
  30       subject = subjectGetter();
  31     }
  32
  33     observerService->NotifyObservers(subject, topic, u"");
  34   };
  35
  36   MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(
  37       NS_NewRunnableFunction("dom::quota::NotifyObserversOnMainThread",
  38                              std::move(mainThreadFunction))));
  39 }
  40
  41 }  // namespace mozilla::dom::quota