71 lines
2.3 KiB
C++
71 lines
2.3 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 "mozilla/MemoryReporting.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 "mozilla/Atomics.h"
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class nsDiskCacheDevice;
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class nsDiskCacheStreamIO : public nsIOutputStream {
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public:
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explicit nsDiskCacheStreamIO(nsDiskCacheBinding * binding);
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIOUTPUTSTREAM
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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 ClearBinding();
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void IncrementInputStreamCount() { mInStreamCount++; }
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void DecrementInputStreamCount()
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{
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mInStreamCount--;
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NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
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}
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf 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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virtual ~nsDiskCacheStreamIO();
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nsresult OpenCacheFile(int flags, PRFileDesc ** fd);
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nsresult ReadCacheBlocks(uint32_t bufferSize);
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nsresult FlushBufferToFile();
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void UpdateFileSize();
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void DeleteBuffer();
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nsresult CloseOutputStream();
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nsresult SeekAndTruncate(uint32_t offset);
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nsDiskCacheBinding * mBinding; // not an owning reference
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nsDiskCacheDevice * mDevice;
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mozilla::Atomic<int32_t> mInStreamCount;
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PRFileDesc * mFD;
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uint32_t mStreamEnd; // current size of data
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uint32_t mBufSize; // current end of buffer
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char * mBuffer;
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bool mOutputStreamIsOpen;
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};
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#endif // _nsDiskCacheStreams_h_
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