dom/storage/SessionStorageObserver.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 "SessionStorageObserver.h"
   8 #include "StorageIPC.h"
   9 #include "mozilla/dom/LocalStorageCommon.h"
  10
  11 namespace mozilla {
  12 namespace dom {
  13
  14 namespace {
  15
  16 SessionStorageObserver* gSessionStorageObserver = nullptr;
  17
  18 }  // namespace
  19
  20 SessionStorageObserver::SessionStorageObserver() : mActor(nullptr) {
  21   AssertIsOnOwningThread();
  22   MOZ_ASSERT(NextGenLocalStorageEnabled());
  23
  24   MOZ_ASSERT(!gSessionStorageObserver);
  25   gSessionStorageObserver = this;
  26 }
  27
  28 SessionStorageObserver::~SessionStorageObserver() {
  29   AssertIsOnOwningThread();
  30
  31   if (mActor) {
  32     mActor->SendDeleteMeInternal();
  33     MOZ_ASSERT(!mActor, "SendDeleteMeInternal should have cleared!");
  34   }
  35
  36   MOZ_ASSERT(gSessionStorageObserver);
  37   gSessionStorageObserver = nullptr;
  38 }
  39
  40 // static
  41 SessionStorageObserver* SessionStorageObserver::Get() {
  42   MOZ_ASSERT(NS_IsMainThread());
  43   MOZ_ASSERT(NextGenLocalStorageEnabled());
  44
  45   return gSessionStorageObserver;
  46 }
  47
  48 void SessionStorageObserver::SetActor(SessionStorageObserverChild* aActor) {
  49   AssertIsOnOwningThread();
  50   MOZ_ASSERT(aActor);
  51   MOZ_ASSERT(!mActor);
  52
  53   mActor = aActor;
  54 }
  55
  56 }  // namespace dom
  57 }  // namespace mozilla