barrier/io/CBufferedOutputStream.h

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#ifndef CBUFFEREDOUTPUTSTREAM_H
#define CBUFFEREDOUTPUTSTREAM_H
#include "CStreamBuffer.h"
#include "IOutputStream.h"
#include "CCondVar.h"
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class CMutex;
class IJob;
class CBufferedOutputStream : public IOutputStream {
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public:
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CBufferedOutputStream(CMutex*, IJob* adoptedCloseCB);
~CBufferedOutputStream();
// the caller is expected to lock the mutex before calling
// methods unless otherwise noted.
// manipulators
// peek() returns a buffer of n bytes (which must be <= getSize()).
// pop() discards the next n bytes.
const void* peek(UInt32 n);
void pop(UInt32 n);
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// accessors
// return the number of bytes in the buffer
UInt32 getSize() const;
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// IOutputStream overrides
// these all lock the mutex for their duration
virtual void close();
virtual UInt32 write(const void*, UInt32 count);
virtual void flush();
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private:
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CMutex* m_mutex;
IJob* m_closeCB;
CCondVar<bool> m_empty;
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CStreamBuffer m_buffer;
bool m_closed;
};
#endif