dom/webauthn/WebAuthnManagerBase.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/WebAuthnManagerBase.h"
   8 #include "mozilla/dom/WebAuthnTransactionChild.h"
   9 #include "mozilla/ipc/BackgroundChild.h"
  10 #include "mozilla/ipc/PBackgroundChild.h"
  11
  12 namespace mozilla::dom {
  13
  14 WebAuthnManagerBase::WebAuthnManagerBase(nsPIDOMWindowInner* aParent)
  15     : mParent(aParent) {
  16   MOZ_ASSERT(NS_IsMainThread());
  17   MOZ_ASSERT(aParent);
  18 }
  19
  20 WebAuthnManagerBase::~WebAuthnManagerBase() { MOZ_ASSERT(NS_IsMainThread()); }
  21
  22 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WebAuthnManagerBase)
  23   NS_INTERFACE_MAP_ENTRY(nsISupports)
  24 NS_INTERFACE_MAP_END
  25
  26 NS_IMPL_CYCLE_COLLECTION(WebAuthnManagerBase, mParent)
  27
  28 NS_IMPL_CYCLE_COLLECTING_ADDREF(WebAuthnManagerBase)
  29 NS_IMPL_CYCLE_COLLECTING_RELEASE(WebAuthnManagerBase)
  30
  31 /***********************************************************************
  32  * IPC Protocol Implementation
  33  **********************************************************************/
  34
  35 bool WebAuthnManagerBase::MaybeCreateBackgroundActor() {
  36   MOZ_ASSERT(NS_IsMainThread());
  37
  38   if (mChild) {
  39     return true;
  40   }
  41
  42   ::mozilla::ipc::PBackgroundChild* actorChild =
  43       ::mozilla::ipc::BackgroundChild::GetOrCreateForCurrentThread();
  44   if (NS_WARN_IF(!actorChild)) {
  45     return false;
  46   }
  47
  48   RefPtr<WebAuthnTransactionChild> mgr(new WebAuthnTransactionChild(this));
  49   PWebAuthnTransactionChild* constructedMgr =
  50       actorChild->SendPWebAuthnTransactionConstructor(mgr);
  51
  52   if (NS_WARN_IF(!constructedMgr)) {
  53     return false;
  54   }
  55
  56   MOZ_ASSERT(constructedMgr == mgr);
  57   mChild = std::move(mgr);
  58
  59   return true;
  60 }
  61
  62 void WebAuthnManagerBase::ActorDestroyed() {
  63   MOZ_ASSERT(NS_IsMainThread());
  64   mChild = nullptr;
  65 }
  66
  67 }  // namespace mozilla::dom