tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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LSObserver.cpp (1626B)

      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 "LSObserver.h"
      8 
      9 // Local includes
     10 #include "ActorsChild.h"
     11 
     12 // Global includes
     13 
     14 #include "mozilla/StaticPtr.h"
     15 #include "nsHashKeys.h"
     16 #include "nsTHashMap.h"
     17 
     18 namespace mozilla::dom {
     19 
     20 namespace {
     21 
     22 using LSObserverHashtable = nsTHashMap<nsCStringHashKey, LSObserver*>;
     23 
     24 StaticAutoPtr<LSObserverHashtable> gLSObservers;
     25 
     26 }  // namespace
     27 
     28 LSObserver::LSObserver(const nsACString& aOrigin)
     29    : mActor(nullptr), mOrigin(aOrigin) {
     30  AssertIsOnOwningThread();
     31 
     32  if (!gLSObservers) {
     33    gLSObservers = new LSObserverHashtable();
     34  }
     35 
     36  MOZ_ASSERT(!gLSObservers->Contains(mOrigin));
     37  gLSObservers->InsertOrUpdate(mOrigin, this);
     38 }
     39 
     40 LSObserver::~LSObserver() {
     41  AssertIsOnOwningThread();
     42 
     43  if (mActor) {
     44    mActor->SendDeleteMeInternal();
     45    MOZ_ASSERT(!mActor, "SendDeleteMeInternal should have cleared!");
     46  }
     47 
     48  MOZ_ASSERT(gLSObservers);
     49  MOZ_ASSERT(gLSObservers->Get(mOrigin));
     50  gLSObservers->Remove(mOrigin);
     51 
     52  if (!gLSObservers->Count()) {
     53    gLSObservers = nullptr;
     54  }
     55 }
     56 
     57 // static
     58 LSObserver* LSObserver::Get(const nsACString& aOrigin) {
     59  return gLSObservers ? gLSObservers->Get(aOrigin) : nullptr;
     60 }
     61 
     62 void LSObserver::SetActor(LSObserverChild* aActor) {
     63  AssertIsOnOwningThread();
     64  MOZ_ASSERT(aActor);
     65  MOZ_ASSERT(!mActor);
     66 
     67  mActor = aActor;
     68 }
     69 
     70 }  // namespace mozilla::dom