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88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _nsDiskCacheStreams_h_
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#define _nsDiskCacheStreams_h_
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#include "nsDiskCacheBinding.h"
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#include "nsCache.h"
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#include "nsIInputStream.h"
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#include "nsIOutputStream.h"
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#include "pratom.h"
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class nsDiskCacheInputStream;
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class nsDiskCacheOutputStream;
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class nsDiskCacheDevice;
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class nsDiskCacheStreamIO : public nsISupports {
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public:
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nsDiskCacheStreamIO(nsDiskCacheBinding * binding);
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virtual ~nsDiskCacheStreamIO();
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NS_DECL_ISUPPORTS
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nsresult GetInputStream(uint32_t offset, nsIInputStream ** inputStream);
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nsresult GetOutputStream(uint32_t offset, nsIOutputStream ** outputStream);
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nsresult CloseOutputStream(nsDiskCacheOutputStream * outputStream);
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nsresult CloseOutputStreamInternal(nsDiskCacheOutputStream * outputStream);
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nsresult Write( const char * buffer,
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uint32_t count,
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uint32_t * bytesWritten);
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nsresult Seek(int32_t whence, int32_t offset);
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nsresult Tell(uint32_t * position);
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nsresult SetEOF();
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nsresult ClearBinding();
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void IncrementInputStreamCount() { PR_ATOMIC_INCREMENT(&mInStreamCount); }
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void DecrementInputStreamCount()
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{
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PR_ATOMIC_DECREMENT(&mInStreamCount);
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NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
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}
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size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf);
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// GCC 2.95.2 requires this to be defined, although we never call it.
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// and OS/2 requires that it not be private
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nsDiskCacheStreamIO() { NS_NOTREACHED("oops"); }
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private:
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void Close();
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nsresult OpenCacheFile(int flags, PRFileDesc ** fd);
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nsresult ReadCacheBlocks();
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nsresult FlushBufferToFile();
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void UpdateFileSize();
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void DeleteBuffer();
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nsresult Flush();
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nsDiskCacheBinding * mBinding; // not an owning reference
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nsDiskCacheDevice * mDevice;
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nsDiskCacheOutputStream * mOutStream; // not an owning reference
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int32_t mInStreamCount;
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nsCOMPtr<nsIFile> mLocalFile;
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PRFileDesc * mFD;
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uint32_t mStreamPos; // for Output Streams
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uint32_t mStreamEnd;
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uint32_t mBufPos; // current mark in buffer
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uint32_t mBufEnd; // current end of data in buffer
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uint32_t mBufSize; // current end of buffer
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bool mBufDirty;
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char * mBuffer;
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};
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#endif // _nsDiskCacheStreams_h_
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