gecko-dev/netwerk/cache2/CacheFileOutputStream.h

/* 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 CacheFileOutputStream__h__
#define CacheFileOutputStream__h__

#include "nsIAsyncOutputStream.h"
#include "nsISeekableStream.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "CacheFileChunk.h"


namespace mozilla {
namespace net {

class CacheFile;
class CacheOutputCloseListener;

class CacheFileOutputStream : public nsIAsyncOutputStream
                            , public nsISeekableStream
                            , public CacheFileChunkListener
{
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIOUTPUTSTREAM
  NS_DECL_NSIASYNCOUTPUTSTREAM
  NS_DECL_NSISEEKABLESTREAM

public:
  CacheFileOutputStream(CacheFile *aFile,
                        CacheOutputCloseListener *aCloseListener,
                        bool aAlternativeData);

  NS_IMETHOD OnChunkRead(nsresult aResult, CacheFileChunk *aChunk) override;
  NS_IMETHOD OnChunkWritten(nsresult aResult, CacheFileChunk *aChunk) override;
  NS_IMETHOD OnChunkAvailable(nsresult aResult, uint32_t aChunkIdx,
                              CacheFileChunk *aChunk) override;
  NS_IMETHOD OnChunkUpdated(CacheFileChunk *aChunk) override;

  void NotifyCloseListener();
  bool IsAlternativeData() const { return mAlternativeData; };

  // Memory reporting
  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;

private:
  virtual ~CacheFileOutputStream();

  nsresult CloseWithStatusLocked(nsresult aStatus);
  void ReleaseChunk();
  void EnsureCorrectChunk(bool aReleaseOnly);
  void FillHole();
  void NotifyListener();

  RefPtr<CacheFile>        mFile;
  RefPtr<CacheFileChunk> mChunk;
  RefPtr<CacheOutputCloseListener> mCloseListener;
  int64_t                  mPos;
  bool                     mClosed : 1;
  bool const               mAlternativeData : 1;
  nsresult                 mStatus;

  nsCOMPtr<nsIOutputStreamCallback> mCallback;
  uint32_t                          mCallbackFlags;
  nsCOMPtr<nsIEventTarget>          mCallbackTarget;
};


} // namespace net
} // namespace mozilla

#endif