dom/broadcastchannel/BroadcastChannelParent.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
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "BroadcastChannelParent.h"
   8 #include "BroadcastChannelService.h"
   9 #include "mozilla/dom/File.h"
  10 #include "mozilla/dom/IPCBlobUtils.h"
  11 #include "mozilla/ipc/BackgroundParent.h"
  12 #include "mozilla/ipc/IPCStreamUtils.h"
  13 #include "mozilla/Unused.h"
  14
  15 namespace mozilla {
  16
  17 using namespace ipc;
  18
  19 namespace dom {
  20
  21 BroadcastChannelParent::BroadcastChannelParent(
  22     const nsAString& aOriginChannelKey)
  23     : mService(BroadcastChannelService::GetOrCreate()),
  24       mOriginChannelKey(aOriginChannelKey) {
  25   AssertIsOnBackgroundThread();
  26   mService->RegisterActor(this, mOriginChannelKey);
  27 }
  28
  29 BroadcastChannelParent::~BroadcastChannelParent() {
  30   AssertIsOnBackgroundThread();
  31 }
  32
  33 mozilla::ipc::IPCResult BroadcastChannelParent::RecvPostMessage(
  34     const MessageData& aData) {
  35   AssertIsOnBackgroundThread();
  36
  37   if (NS_WARN_IF(!mService)) {
  38     return IPC_FAIL_NO_REASON(this);
  39   }
  40
  41   mService->PostMessage(this, aData, mOriginChannelKey);
  42   return IPC_OK();
  43 }
  44
  45 mozilla::ipc::IPCResult BroadcastChannelParent::RecvClose() {
  46   AssertIsOnBackgroundThread();
  47
  48   if (NS_WARN_IF(!mService)) {
  49     return IPC_FAIL_NO_REASON(this);
  50   }
  51
  52   mService->UnregisterActor(this, mOriginChannelKey);
  53   mService = nullptr;
  54
  55   Unused << Send__delete__(this);
  56
  57   return IPC_OK();
  58 }
  59
  60 void BroadcastChannelParent::ActorDestroy(ActorDestroyReason aWhy) {
  61   AssertIsOnBackgroundThread();
  62
  63   if (mService) {
  64     // This object is about to be released and with it, also mService will be
  65     // released too.
  66     mService->UnregisterActor(this, mOriginChannelKey);
  67   }
  68 }
  69
  70 }  // namespace dom
  71 }  // namespace mozilla