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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 _nsDiskCacheStreams_h_
#define _nsDiskCacheStreams_h_
#include "mozilla/MemoryReporting.h"
#include "nsDiskCacheBinding.h"
#include "nsCache.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "mozilla/Atomics.h"
class nsDiskCacheDevice;
class nsDiskCacheStreamIO : public nsIOutputStream {
public:
explicit nsDiskCacheStreamIO(nsDiskCacheBinding * binding);
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOUTPUTSTREAM
nsresult GetInputStream(uint32_t offset, nsIInputStream ** inputStream);
nsresult GetOutputStream(uint32_t offset, nsIOutputStream ** outputStream);
nsresult ClearBinding();
void IncrementInputStreamCount() { mInStreamCount++; }
void DecrementInputStreamCount()
{
mInStreamCount--;
NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
}
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
// GCC 2.95.2 requires this to be defined, although we never call it.
// and OS/2 requires that it not be private
nsDiskCacheStreamIO() { NS_NOTREACHED("oops"); }
private:
virtual ~nsDiskCacheStreamIO();
nsresult OpenCacheFile(int flags, PRFileDesc ** fd);
nsresult ReadCacheBlocks(uint32_t bufferSize);
nsresult FlushBufferToFile();
void UpdateFileSize();
void DeleteBuffer();
nsresult CloseOutputStream();
nsresult SeekAndTruncate(uint32_t offset);
nsDiskCacheBinding * mBinding; // not an owning reference
nsDiskCacheDevice * mDevice;
mozilla::Atomic<int32_t> mInStreamCount;
PRFileDesc * mFD;
uint32_t mStreamEnd; // current size of data
uint32_t mBufSize; // current end of buffer
char * mBuffer;
bool mOutputStreamIsOpen;
};
#endif // _nsDiskCacheStreams_h_
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