include/dbus-c++/eventloop-integration.h

/*
 *
 *  D-Bus++ - C++ bindings for D-Bus
 *
 *  Copyright (C) 2005-2007  Paolo Durante <shackan@gmail.com>
 *
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


#ifndef __DBUSXX_EVENTLOOP_INTEGRATION_H
#define __DBUSXX_EVENTLOOP_INTEGRATION_H

#include <cstring>
#include <errno.h>
#include <unistd.h>
#include "api.h"
#include "dispatcher.h"
#include "util.h"
#include "eventloop.h"

namespace DBus {

/* 
 * Glue between the event loop and the DBus library
 */

class BusDispatcher;

class DXXAPI BusTimeout : public Timeout, public DefaultTimeout
{
	BusTimeout(Timeout::Internal *, BusDispatcher *);

	void toggle();

friend class BusDispatcher;
};

class DXXAPI BusWatch : public Watch, public DefaultWatch
{
	BusWatch(Watch::Internal *, BusDispatcher *);

	void toggle();

friend class BusDispatcher;
};

class DXXAPI BusDispatcher : public Dispatcher, public DefaultMainLoop
{
public:

	int _pipe[2];

	BusDispatcher() : _running(false)
	{
		//pipe to create a new fd used to unlock a dispatcher at any
    // moment (used by leave function)
		int ret = pipe(_pipe);
		if (ret == -1) {
                  char buffer[128]; // buffer copied in Error constructor
                  throw Error("PipeError:errno", strerror_r(errno,
                                                            buffer,
                                                            sizeof(buffer)));
                }
		_fdunlock[0] = _pipe[0];
		_fdunlock[1] = _pipe[1];
		
	}

	~BusDispatcher()
	{}

	virtual void enter();

	virtual void leave();

	virtual void do_iteration();

	virtual Timeout *add_timeout(Timeout::Internal *);

	virtual void rem_timeout(Timeout *);

	virtual Watch *add_watch(Watch::Internal *);

	virtual void rem_watch(Watch *);

	void watch_ready(DefaultWatch &);

	void timeout_expired(DefaultTimeout &);

private:

	bool _running;
};

} /* namespace DBus */

#endif//__DBUSXX_EVENTLOOP_INTEGRATION_H