barrier/io/CBufferedOutputStream.h

47 lines
1.0 KiB
C++

#ifndef CBUFFEREDOUTPUTSTREAM_H
#define CBUFFEREDOUTPUTSTREAM_H
#include "CStreamBuffer.h"
#include "IOutputStream.h"
class CMutex;
class IJob;
class CBufferedOutputStream : public IOutputStream {
public:
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) throw();
void pop(UInt32 n) throw();
// accessors
// return the number of bytes in the buffer
UInt32 getSize() const throw();
// IOutputStream overrides
// these all lock the mutex for their duration
virtual void close() throw(XIO);
virtual UInt32 write(const void*, UInt32 count) throw(XIO);
virtual void flush() throw(XIO);
private:
UInt32 getSizeWithLock() const throw();
private:
CMutex* m_mutex;
IJob* m_closeCB;
CStreamBuffer m_buffer;
bool m_closed;
};
#endif