/* -*- 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_ipc_IPCBlobInputStreamParent_h

#define mozilla_dom_ipc_IPCBlobInputStreamParent_h

#include "mozilla/ipc/PIPCBlobInputStreamParent.h"

class nsIInputStream;

namespace mozilla {

namespace dom {

class NS_NO_VTABLE IPCBlobInputStreamParentCallback

{

public:

  virtual void

  ActorDestroyed(const nsID& aID) = 0;

  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING

protected:

  virtual ~IPCBlobInputStreamParentCallback()

  { }

};

class IPCBlobInputStreamParent final

  : public mozilla::ipc::PIPCBlobInputStreamParent

{

public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(IPCBlobInputStreamParent)

  // The size of the inputStream must be passed as argument in order to avoid

  // the use of nsIInputStream::Available() which could open a fileDescriptor in

  // case the stream is a nsFileStream.

  template<typename M>

  static already_AddRefed<IPCBlobInputStreamParent>

  Create(nsIInputStream* aInputStream, uint64_t aSize,

         uint64_t aChildID, nsresult* aRv, M* aManager);

  static already_AddRefed<IPCBlobInputStreamParent>

  Create(const nsID& aID, uint64_t aSize,

         mozilla::ipc::PBackgroundParent* aManager);

  void

  ActorDestroy(IProtocol::ActorDestroyReason aReason) override;

  const nsID&

  ID() const

  {

    return mID;

  }

  uint64_t

  Size() const

  {

    return mSize;

  }

  void

  SetCallback(IPCBlobInputStreamParentCallback* aCallback);

  mozilla::ipc::IPCResult

  RecvStreamNeeded() override;

  mozilla::ipc::IPCResult

  RecvLengthNeeded() override;

  mozilla::ipc::IPCResult

  RecvClose() override;

  mozilla::ipc::IPCResult

  Recv__delete__() override;

  bool

  HasValidStream() const;

private:

  IPCBlobInputStreamParent(const nsID& aID, uint64_t aSize,

                           nsIContentParent* aManager);

  IPCBlobInputStreamParent(const nsID& aID, uint64_t aSize,

                           mozilla::ipc::PBackgroundParent* aManager);

  ~IPCBlobInputStreamParent() = default;

  const nsID mID;

  const uint64_t mSize;

  // Only 1 of these 2 is set. Raw pointer because these 2 managers are keeping

  // the parent actor alive. The pointers will be nullified in ActorDestroyed.

  nsIContentParent* mContentManager;

  mozilla::ipc::PBackgroundParent* mPBackgroundManager;

  RefPtr<IPCBlobInputStreamParentCallback> mCallback;

  bool mMigrating;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_ipc_IPCBlobInputStreamParent_h