// -*- c++ -*-
/* This file is part of the KDE libraries
Copyright (C) 2000 Stephan Kulow <coolo@kde.org>
David Faure <faure@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __connection_h__
#define __connection_h__ "$Id: connection.h,v 1.16 2000/05/24 03:59:43 waba Exp $"
#include <sys/types.h>
#include <stdio.h>
#include <kprocess.h>
class KSocket;
class QSocketNotifier;
namespace KIO {
struct Task {
int cmd;
QByteArray data;
};
/**
* This class provides a simple means for IPC between two applications
* via a pipe.
* It handles a queue of commands to be sent, and has a internal signal
* called after a command has been sent, to send the next one (FIFO).
*/
class Connection : public QObject
{
Q_OBJECT
public:
Connection();
virtual ~Connection();
void init(KSocket *sock);
void connect(QObject *receiver = 0, const char *member = 0);
void close();
int fd_from() const { return fd_in; }
void init(int fd_in, int fd_out);
bool inited() const { return (fd_in != 0) && (f_out != 0); }
// send (queues the command to be sent)
void send(int cmd, const QByteArray &arr = QByteArray());
// send (without queue)
bool sendnow( int _cmd, const QByteArray &data );
/**
* Receive data
*
* @return >=0 indicates the received data size upon success
* -1 indicates error
*/
int read( int* _cmd, QByteArray & );
/**
* Don't handle incoming data until resumed
*/
void suspend();
/**
* Resume handling of incoming data
*/
void resume();
/**
* Returns status of connection
*/
bool suspended() const { return m_suspended; }
void queueOnly(bool queue);
protected slots:
void dequeue();
protected:
private:
bool queueonly;
int fd_in;
FILE *f_out;
KSocket *socket;
QSocketNotifier *notifier;
QObject *receiver;
const char *member;
QList<Task> tasks;
int unqueuedTasks;
bool m_suspended;
};
};
#endif