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The Tor Browser
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LockManager.h (2211B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      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 #ifndef mozilla_dom_LockManager_h
      8 #define mozilla_dom_LockManager_h
      9 
     10 #include "js/TypeDecls.h"
     11 #include "mozilla/ErrorResult.h"
     12 #include "mozilla/dom/BindingDeclarations.h"
     13 #include "mozilla/dom/Lock.h"
     14 #include "mozilla/dom/LockManagerBinding.h"
     15 #include "mozilla/dom/WorkerRef.h"
     16 #include "nsCycleCollectionParticipant.h"
     17 #include "nsHashKeys.h"
     18 #include "nsTHashMap.h"
     19 #include "nsTHashSet.h"
     20 #include "nsWrapperCache.h"
     21 
     22 class nsIGlobalObject;
     23 
     24 namespace mozilla::dom {
     25 
     26 class LockGrantedCallback;
     27 struct LockOptions;
     28 
     29 namespace locks {
     30 class LockManagerChild;
     31 }
     32 
     33 class LockManager final : public nsISupports, public nsWrapperCache {
     34 public:
     35  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
     36  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(LockManager)
     37 
     38 private:
     39  explicit LockManager(nsIGlobalObject* aGlobal);
     40 
     41 public:
     42  static already_AddRefed<LockManager> Create(nsIGlobalObject& aGlobal);
     43 
     44  nsIGlobalObject* GetParentObject() const { return mOwner; }
     45 
     46  JSObject* WrapObject(JSContext* aCx,
     47                       JS::Handle<JSObject*> aGivenProto) override;
     48 
     49  already_AddRefed<Promise> Request(const nsAString& aName,
     50                                    LockGrantedCallback& aCallback,
     51                                    ErrorResult& aRv);
     52  already_AddRefed<Promise> Request(const nsAString& aName,
     53                                    const LockOptions& aOptions,
     54                                    LockGrantedCallback& aCallback,
     55                                    ErrorResult& aRv);
     56 
     57  already_AddRefed<Promise> Query(ErrorResult& aRv);
     58 
     59  void Shutdown();
     60 
     61 private:
     62  ~LockManager() = default;
     63 
     64  nsCOMPtr<nsIGlobalObject> mOwner;
     65  RefPtr<locks::LockManagerChild> mActor;
     66 
     67  // Revokes itself and triggers LockManagerChild deletion on worker shutdown
     68  // callback.
     69  RefPtr<WeakWorkerRef> mWorkerRef;
     70 };
     71 
     72 }  // namespace mozilla::dom
     73 
     74 #endif  // mozilla_dom_LockManager_h