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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>qasyncio.h</h1>
<p>This is the verbatim text of the qasyncio.h include file. It is provided only for illustration; the copyright remains with Trolltech.
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<pre>
/****************************************************************************
** $Id: qt/qasyncio.h 3.3.7 edited Aug 31 2005 $
**
** Definition of asynchronous I/O classes
**
** Created : 970617
**
** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/
#ifndef QASYNCIO_H
#define QASYNCIO_H
#ifndef QT_H
#include "qobject.h"
#include "qsignal.h"
#include "qtimer.h"
#endif // QT_H
#ifndef QT_NO_ASYNC_IO
class QIODevice;
class Q_EXPORT QAsyncIO {
public:
virtual ~QAsyncIO();
void connect(QObject*, const char *member);
protected:
void ready();
private:
QSignal signal;
};
class Q_EXPORT QDataSink : public QAsyncIO {
public:
// Call this to know how much I can take.
virtual int readyToReceive()=0;
virtual void receive(const uchar*, int count)=0;
virtual void eof()=0;
void maybeReady();
};
class Q_EXPORT QDataSource : public QAsyncIO {
public:
virtual int readyToSend()=0; // returns -1 when never any more ready
virtual void sendTo(QDataSink*, int count)=0;
void maybeReady();
virtual bool rewindable() const;
virtual void enableRewind(bool);
virtual void rewind();
};
class Q_EXPORT QIODeviceSource : public QDataSource {
const int buf_size;
uchar *buffer;
QIODevice* iod;
bool rew;
public:
QIODeviceSource(QIODevice*, int bufsize=4096);
~QIODeviceSource();
int readyToSend();
void sendTo(QDataSink* sink, int n);
bool rewindable() const;
void enableRewind(bool on);
void rewind();
};
class Q_EXPORT QDataPump : public QObject {
Q_OBJECT
int interval;
QTimer timer;
QDataSource* source;
QDataSink* sink;
public:
QDataPump(QDataSource*, QDataSink*);
private slots:
void kickStart();
void tryToPump();
};
#endif // QT_NO_ASYNC_IO
#endif
</pre>
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