1 files changed, 111 insertions, 0 deletions
diff --git a/dom/cache/CacheChild.h b/dom/cache/CacheChild.h
new file mode 100644
index 000000000..8888007b0
--- /dev/null
+++ b/dom/cache/CacheChild.h
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_cache_CacheChild_h
+#define mozilla_dom_cache_CacheChild_h
+
+#include "mozilla/dom/cache/ActorChild.h"
+#include "mozilla/dom/cache/PCacheChild.h"
+
+class nsIAsyncInputStream;
+class nsIGlobalObject;
+
+namespace mozilla {
+namespace dom {
+
+class Promise;
+
+namespace cache {
+
+class Cache;
+class CacheOpArgs;
+
+class CacheChild final : public PCacheChild
+                       , public ActorChild
+{
+public:
+  class MOZ_RAII AutoLock final
+  {
+    CacheChild* mActor;
+
+  public:
+    explicit AutoLock(CacheChild* aActor)
+      : mActor(aActor)
+    {
+      MOZ_DIAGNOSTIC_ASSERT(mActor);
+      mActor->Lock();
+    }
+
+    ~AutoLock()
+    {
+      mActor->Unlock();
+    }
+  };
+
+  CacheChild();
+  ~CacheChild();
+
+  void SetListener(Cache* aListener);
+
+  // Must be called by the associated Cache listener in its DestroyInternal()
+  // method.  Also, Cache must call StartDestroyFromListener() on the actor in
+  // its destructor to trigger ActorDestroy() if it has not been called yet.
+  void ClearListener();
+
+  void
+  ExecuteOp(nsIGlobalObject* aGlobal, Promise* aPromise,
+            nsISupports* aParent, const CacheOpArgs& aArgs);
+
+  // Our parent Listener object has gone out of scope and is being destroyed.
+  void StartDestroyFromListener();
+
+private:
+  // ActorChild methods
+
+  // WorkerHolder is trying to destroy due to worker shutdown.
+  virtual void StartDestroy() override;
+
+  // PCacheChild methods
+  virtual void
+  ActorDestroy(ActorDestroyReason aReason) override;
+
+  virtual PCacheOpChild*
+  AllocPCacheOpChild(const CacheOpArgs& aOpArgs) override;
+
+  virtual bool
+  DeallocPCacheOpChild(PCacheOpChild* aActor) override;
+
+  // utility methods
+  void
+  NoteDeletedActor();
+
+  void
+  MaybeFlushDelayedDestroy();
+
+  // Methods used to temporarily force the actor alive.  Only called from
+  // AutoLock.
+  void
+  Lock();
+
+  void
+  Unlock();
+
+  // Use a weak ref so actor does not hold DOM object alive past content use.
+  // The Cache object must call ClearListener() to null this before its
+  // destroyed.
+  Cache* MOZ_NON_OWNING_REF mListener;
+  uint32_t mNumChildActors;
+  bool mDelayedDestroy;
+  bool mLocked;
+
+  NS_DECL_OWNINGTHREAD
+};
+
+} // namespace cache
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_cache_CacheChild_h