/****************************************************************************
** $Id: qasyncio.h,v 1.5.2.1 1998/08/19 16:02:28 agulbra Exp $
**
** *** INTERNAL HEADER FILE ***
**
** This file is NOT a part of the Qt interface!
**
** Definition of asynchronous I/O classes
**
** Created : 970617
**
** Copyright (C) 1992-1998 Troll Tech AS. All rights reserved.
**
** This file is part of Troll Tech's internal development tree for Qt.
**
** This header text will be replaced by an appropriate text by the
** mkdist script which generates external distributions.
**
** If you are using the Qt Professional Edition or the Qt Free Edition,
** please notify Troll Tech at <info@troll.no> if you see this text.
**
** To Troll Tech developers: This header was generated by the script
** fixcopyright-int. It has the same number of text lines as the free
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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
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
| Copyright © 1998 Troll Tech | Trademarks | Qt version 1.41
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