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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - qasyncio.h include file</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>qasyncio.h</h1><br clear="all">This is the verbatim text of the qasyncio.h include file. It isprovided only for illustration; the copyrightremains with Trolltech.<hr><pre>/****************************************************************************** $Id: qt/src/kernel/qasyncio.h 2.3.8 edited 2004-05-12 $**** Definition of asynchronous I/O classes**** Created : 970617**** Copyright (C) 1992-2000 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.**** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for** 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.**** Contact info@trolltech.com if any conditions of this licensing are** not clear to you.************************************************************************/#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_IOclass <a href="qiodevice.html">QIODevice</a>;class Q_EXPORT <a href="qasyncio.html">QAsyncIO</a> {public: virtual ~QAsyncIO(); void connect(QObject*, const char *member);protected: void ready();private: QSignal signal;};class Q_EXPORT <a href="qdatasink.html">QDataSink</a> : public <a href="qasyncio.html">QAsyncIO</a> {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 <a href="qdatasource.html">QDataSource</a> : public <a href="qasyncio.html">QAsyncIO</a> {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 <a href="qiodevicesource.html">QIODeviceSource</a> : public <a href="qdatasource.html">QDataSource</a> { 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 <a href="qdatapump.html">QDataPump</a> : public <a href="qobject.html">QObject</a> { 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><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright ⌨️ 快捷键说明
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