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CacheStorageChild.h (2860B)

      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 #ifndef mozilla_dom_cache_CacheStorageChild_h
      8 #define mozilla_dom_cache_CacheStorageChild_h
      9 
     10 #include "mozilla/dom/cache/ActorChild.h"
     11 #include "mozilla/dom/cache/CacheOpChild.h"
     12 #include "mozilla/dom/cache/PCacheStorageChild.h"
     13 #include "mozilla/dom/cache/TypeUtils.h"
     14 #include "mozilla/dom/cache/Types.h"
     15 
     16 class nsIGlobalObject;
     17 
     18 namespace mozilla::dom {
     19 
     20 class Promise;
     21 
     22 namespace cache {
     23 
     24 class CacheOpArgs;
     25 class CacheStorage;
     26 class CacheWorkerRef;
     27 class PCacheChild;
     28 
     29 class CacheStorageChild final : public PCacheStorageChild,
     30                                public CacheActorChild {
     31  friend class PCacheStorageChild;
     32 
     33 public:
     34  CacheStorageChild(CacheStorageChildListener* aListener,
     35                    SafeRefPtr<CacheWorkerRef> aWorkerRef,
     36                    ActorChild* aParentActor = nullptr);
     37 
     38  // Must be called by the associated CacheStorage listener in its
     39  // OnActorDestroy() method.  Also, CacheStorage must call
     40  // SendDestroyFromListener() on the actor in its destructor to trigger
     41  // ActorDestroy() if it has not been called yet.
     42  void ClearListener();
     43 
     44  template <typename PromiseType>
     45  void ExecuteOp(nsIGlobalObject* aGlobal, PromiseType& aPromise,
     46                 nsISupports* aParent, const CacheOpArgs& aArgs) {
     47    (void)SendPCacheOpConstructor(
     48        new CacheOpChild(GetWorkerRefPtr().clonePtr(), aGlobal, aParent,
     49                         aPromise, this),
     50        aArgs);
     51  }
     52 
     53  // Our parent Listener object has gone out of scope and is being destroyed.
     54  void StartDestroyFromListener();
     55 
     56  NS_INLINE_DECL_REFCOUNTING(CacheStorageChild, override)
     57  void NoteDeletedActor() override;
     58 
     59 private:
     60  ~CacheStorageChild();
     61 
     62  void DestroyInternal();
     63 
     64  // ActorChild methods
     65  // CacheWorkerRef is trying to destroy due to worker shutdown.
     66  virtual void StartDestroy() override;
     67 
     68  // PCacheStorageChild methods
     69  virtual void ActorDestroy(ActorDestroyReason aReason) override;
     70 
     71  PCacheOpChild* AllocPCacheOpChild(const CacheOpArgs& aOpArgs);
     72 
     73  bool DeallocPCacheOpChild(PCacheOpChild* aActor);
     74 
     75  // utility methods
     76  inline uint32_t NumChildActors() { return ManagedPCacheOpChild().Count(); }
     77 
     78  ActorChild* mParentActor;
     79 
     80  // Use a weak ref so actor does not hold DOM object alive past content use.
     81  // The CacheStorage object must call ClearListener() to null this before its
     82  // destroyed.
     83  CacheStorageChildListener* MOZ_NON_OWNING_REF mListener;
     84  bool mDelayedDestroy;
     85 };
     86 
     87 }  // namespace cache
     88 }  // namespace mozilla::dom
     89 
     90 #endif  // mozilla_dom_cache_CacheStorageChild_h