dom/cache/CacheStorageChild.h

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