1 files changed, 174 insertions, 0 deletions
diff --git a/dom/filehandle/ActorsParent.h b/dom/filehandle/ActorsParent.h
new file mode 100644
index 0000000000..319c50a0cf
--- /dev/null
+++ b/dom/filehandle/ActorsParent.h
@@ -0,0 +1,174 @@
+/* -*- 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_filehandle_ActorsParent_h
+#define mozilla_dom_filehandle_ActorsParent_h
+
+#include "mozilla/dom/FileHandleStorage.h"
+#include "mozilla/dom/PBackgroundMutableFileParent.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "mozilla/UniquePtr.h"
+#include "nsClassHashtable.h"
+#include "nsCOMPtr.h"
+#include "nsHashKeys.h"
+#include "nsString.h"
+#include "nsTArrayForwardDeclare.h"
+#include "nsTHashSet.h"
+
+template <class>
+struct already_AddRefed;
+class nsIFile;
+class nsIRunnable;
+class nsIThreadPool;
+
+namespace mozilla {
+
+namespace ipc {
+
+class PBackgroundParent;
+
+}  // namespace ipc
+
+namespace dom {
+
+class BlobImpl;
+class FileHandle;
+class FileHandleOp;
+
+class FileHandleThreadPool final {
+  class FileHandleQueue;
+  struct DelayedEnqueueInfo;
+  class DirectoryInfo;
+  struct StoragesCompleteCallback;
+
+  nsCOMPtr<nsIThreadPool> mThreadPool;
+  nsCOMPtr<nsIEventTarget> mOwningEventTarget;
+
+  nsClassHashtable<nsCStringHashKey, DirectoryInfo> mDirectoryInfos;
+
+  nsTArray<UniquePtr<StoragesCompleteCallback>> mCompleteCallbacks;
+
+  bool mShutdownRequested;
+  bool mShutdownComplete;
+
+ public:
+  static already_AddRefed<FileHandleThreadPool> Create();
+
+#ifdef DEBUG
+  void AssertIsOnOwningThread() const;
+
+  nsIEventTarget* GetThreadPoolEventTarget() const;
+#else
+  void AssertIsOnOwningThread() const {}
+#endif
+
+  void Enqueue(FileHandle* aFileHandle, FileHandleOp* aFileHandleOp,
+               bool aFinish);
+
+  NS_INLINE_DECL_REFCOUNTING(FileHandleThreadPool)
+
+  void WaitForDirectoriesToComplete(nsTArray<nsCString>&& aDirectoryIds,
+                                    nsIRunnable* aCallback);
+
+  void Shutdown();
+
+ private:
+  FileHandleThreadPool();
+
+  // Reference counted.
+  ~FileHandleThreadPool();
+
+  nsresult Init();
+
+  void Cleanup();
+
+  void FinishFileHandle(FileHandle* aFileHandle);
+
+  bool MaybeFireCallback(StoragesCompleteCallback* aCallback);
+};
+
+class BackgroundMutableFileParentBase : public PBackgroundMutableFileParent {
+  friend PBackgroundMutableFileParent;
+
+  nsTHashSet<FileHandle*> mFileHandles;
+  nsCString mDirectoryId;
+  nsString mFileName;
+  FileHandleStorage mStorage;
+  bool mInvalidated;
+  bool mActorWasAlive;
+  bool mActorDestroyed;
+
+ protected:
+  nsCOMPtr<nsIFile> mFile;
+
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(BackgroundMutableFileParentBase)
+
+  void Invalidate();
+
+  FileHandleStorage Storage() const { return mStorage; }
+
+  const nsCString& DirectoryId() const { return mDirectoryId; }
+
+  const nsString& FileName() const { return mFileName; }
+
+  bool RegisterFileHandle(FileHandle* aFileHandle);
+
+  void UnregisterFileHandle(FileHandle* aFileHandle);
+
+  void SetActorAlive();
+
+  bool IsActorDestroyed() const {
+    mozilla::ipc::AssertIsOnBackgroundThread();
+
+    return mActorWasAlive && mActorDestroyed;
+  }
+
+  bool IsInvalidated() const {
+    mozilla::ipc::AssertIsOnBackgroundThread();
+
+    return mInvalidated;
+  }
+
+  virtual void NoteActiveState() {}
+
+  virtual void NoteInactiveState() {}
+
+  virtual mozilla::ipc::PBackgroundParent* GetBackgroundParent() const = 0;
+
+  virtual already_AddRefed<nsISupports> CreateStream(bool aReadOnly);
+
+  virtual already_AddRefed<BlobImpl> CreateBlobImpl() { return nullptr; }
+
+ protected:
+  BackgroundMutableFileParentBase(FileHandleStorage aStorage,
+                                  const nsACString& aDirectoryId,
+                                  const nsAString& aFileName, nsIFile* aFile);
+
+  // Reference counted.
+  ~BackgroundMutableFileParentBase();
+
+  // IPDL methods are only called by IPDL.
+  virtual void ActorDestroy(ActorDestroyReason aWhy) override;
+
+  virtual PBackgroundFileHandleParent* AllocPBackgroundFileHandleParent(
+      const FileMode& aMode);
+
+  virtual mozilla::ipc::IPCResult RecvPBackgroundFileHandleConstructor(
+      PBackgroundFileHandleParent* aActor, const FileMode& aMode) override;
+
+  virtual bool DeallocPBackgroundFileHandleParent(
+      PBackgroundFileHandleParent* aActor);
+
+  mozilla::ipc::IPCResult RecvDeleteMe();
+
+  virtual mozilla::ipc::IPCResult RecvGetFileId(int64_t* aFileId);
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_filehandle_ActorsParent_h