/**************************************************************************** ** $Id: qasyncio.h,v 1.10 1999/04/28 09:55:40 aavit Exp $ ** ** *** INTERNAL HEADER FILE *** ** ** This file is NOT a part of the Qt interface! ** ** Definition of asynchronous I/O classes ** ** Created : 970617 ** ** Copyright (C) 1992-1999 Troll Tech AS. All rights reserved. ** ** This file is part of the Qt GUI Toolkit. ** ** This file may be distributed under the terms of the Q Public License ** as defined by Troll Tech AS of Norway and appearing in the file ** LICENSE.QPL included in the packaging of this file. ** ** Licensees holding valid Qt Professional Edition licenses may use this ** file in accordance with the Qt Professional Edition License Agreement ** provided with the Qt Professional Edition. ** ** See http://www.troll.no/pricing.html or email sales@troll.no for ** information about the Professional Edition licensing, or see ** http://www.troll.no/qpl/ for QPL licensing information. ** *****************************************************************************/ #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 © 1999 Troll Tech | Trademarks | Qt version 2.0.2
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