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/***************************************************************************
multibuffer.h
-------------------
begin : Sat Aug 20 2005
copyright : (C) 2005 by Martin Witte
email : witte@kawo1.rwth-aachen.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef KRADIO_MULTIBUFFER_H
#define KRADIO_MULTIBUFFER_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <tqsemaphore.h>
#include <tqstring.h>
class MultiBuffer
{
public:
MultiBuffer(size_t n_buffers, size_t buffersize);
~MultiBuffer();
char *lockWriteBuffer (size_t &bufferSize);
bool unlockWriteBuffer (size_t bufferSize); // return value: complete buffer full / ready for read
void unlockAllWriteBuffers();
char *wait4ReadBuffer (size_t &buffer_fill);
char *getCurrentReadBuffer(size_t &buffer_fill) const;
const TQString &getErrorString() const { return m_errorString; }
bool hasError() const { return m_error; }
void resetError();
size_t getWriteBufferFill() const { return (m_currentReadBuffer != m_currentWriteBuffer) ? m_buffersFill[m_currentWriteBuffer] : 0; }
size_t getAvailableWriteBuffer() const;
size_t getAvailableReadBuffers() const;
size_t getCurrentReadBufferIdx() const { return m_currentReadBuffer; }
size_t getCurrentWriteBufferIdx() const { return m_currentWriteBuffer; }
protected:
size_t m_nBuffers;
size_t m_BufferSize;
char **m_buffers;
size_t *m_buffersFill;
size_t m_currentReadBuffer;
size_t m_currentWriteBuffer;
TQSemaphore m_readLock;
TQString m_errorString;
bool m_error;
};
#endif
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