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- // -*- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
-
- #ifndef __connection_h__
- #define __connection_h__
-
- #include <kdelibs_export.h>
-
- #include <sys/types.h>
-
- #include <stdio.h>
- #include <qptrlist.h>
- #include <qobject.h>
-
- class KSocket;
- class QSocketNotifier;
-
- namespace KIO {
-
- struct KIO_EXPORT 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 which makes it possible to
- * queue data before an actual connection has been established.
- */
- class KIO_EXPORT Connection : public QObject
- {
- Q_OBJECT
- public:
- /**
- * Creates a new connection.
- * @see init()
- */
- Connection();
- virtual ~Connection();
-
- /**
- * Initialize this connection to use the given socket.
- * @param sock the socket to use
- * @see inited()
- */
- void init(KSocket *sock);
- /**
- * Initialize the connection to use the given file
- * descriptors.
- * @param fd_in the input file descriptor to use
- * @param fd_out the output file descriptor to use
- * @see inited()
- */
- void init(int fd_in, int fd_out); // Used by KDENOX
- void connect(QObject *receiver = 0, const char *member = 0);
- /// Closes the connection.
- void close();
-
- /**
- * Returns the input file descriptor.
- * @return the input file descriptor
- */
- int fd_from() const { return fd_in; }
- /**
- * Returns the output file descriptor.
- * @return the output file descriptor
- */
- int fd_to() const { return fileno( f_out ); }
-
- /**
- * Checks whether the connection has been initialized.
- * @return true if the initialized
- * @see init()
- */
- bool inited() const { return (fd_in != -1) && (f_out != 0); }
-
- /**
- * Sends/queues the given command to be sent.
- * @param cmd the command to set
- * @param arr the bytes to send
- */
- void send(int cmd, const QByteArray &arr = QByteArray());
-
- /**
- * Sends the given command immediately.
- * @param _cmd the command to set
- * @param data the bytes to send
- * @return true if successful, false otherwise
- */
- bool sendnow( int _cmd, const QByteArray &data );
-
- /**
- * Receive data.
- *
- * @param _cmd the received command will be written here
- * @param data the received data will be written here
- * @return >=0 indicates the received data size upon success
- * -1 indicates error
- */
- int read( int* _cmd, QByteArray &data );
-
- /**
- * Don't handle incoming data until resumed.
- */
- void suspend();
-
- /**
- * Resume handling of incoming data.
- */
- void resume();
-
- /**
- * Returns status of connection.
- * @return true if suspended, false otherwise
- */
- bool suspended() const { return m_suspended; }
-
- protected slots:
- void dequeue();
-
- protected:
-
-
- private:
- int fd_in;
- FILE *f_out;
- KSocket *socket;
- QSocketNotifier *notifier;
- QObject *receiver;
- const char *member;
- QPtrList<Task> tasks;
- bool m_suspended;
- private:
- class ConnectionPrivate* d;
- };
-
- }
-
- #endif
-