gecko-dev/netwerk/cache2/CacheFileInputStream.h

74 строки
2.1 KiB
C++

/* 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 CacheFileInputStream__h__
#define CacheFileInputStream__h__
#include "nsIAsyncInputStream.h"
#include "nsISeekableStream.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "CacheFileChunk.h"
namespace mozilla {
namespace net {
class CacheFile;
class CacheFileInputStream : public nsIAsyncInputStream
, public nsISeekableStream
, public CacheFileChunkListener
{
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIINPUTSTREAM
NS_DECL_NSIASYNCINPUTSTREAM
NS_DECL_NSISEEKABLESTREAM
public:
explicit CacheFileInputStream(CacheFile *aFile);
NS_IMETHOD OnChunkRead(nsresult aResult, CacheFileChunk *aChunk) MOZ_OVERRIDE;
NS_IMETHOD OnChunkWritten(nsresult aResult, CacheFileChunk *aChunk) MOZ_OVERRIDE;
NS_IMETHOD OnChunkAvailable(nsresult aResult, uint32_t aChunkIdx,
CacheFileChunk *aChunk) MOZ_OVERRIDE;
NS_IMETHOD OnChunkUpdated(CacheFileChunk *aChunk) MOZ_OVERRIDE;
// Memory reporting
size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
uint32_t GetPosition() const { return mPos; };
private:
virtual ~CacheFileInputStream();
nsresult CloseWithStatusLocked(nsresult aStatus);
void ReleaseChunk();
void EnsureCorrectChunk(bool aReleaseOnly);
// CanRead returns negative value when output stream truncates the data before
// the input stream's mPos.
void CanRead(int64_t *aCanRead, const char **aBuf);
void NotifyListener();
void MaybeNotifyListener();
nsRefPtr<CacheFile> mFile;
nsRefPtr<CacheFileChunk> mChunk;
int64_t mPos;
bool mClosed;
nsresult mStatus;
bool mWaitingForUpdate;
int64_t mListeningForChunk;
nsCOMPtr<nsIInputStreamCallback> mCallback;
uint32_t mCallbackFlags;
nsCOMPtr<nsIEventTarget> mCallbackTarget;
};
} // net
} // mozilla
#endif