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// Timer.hh for fluxbox
// Copyright (c) 2002 Henrik Kinnunen (fluxgen at linuxmail.org)
//
// Timer.hh for Blackbox - An X11 Window Manager
// Copyright (c) 1997 - 2000 Brad Hughes (bhughes at tcac.net)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the 
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software. 
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
	
#ifndef	 TIMER_HH
#define	 TIMER_HH

#include <ctime> 
#include <list>

/**
	Inherit this to have a timed object, that calls
	timeout function when the time is out
*/
class TimeoutHandler {
public:
	/// called when the time is out
	virtual void timeout() = 0;
};

/**
	Handles TimeoutHandles
*/
class BTimer {
public:
	explicit BTimer(TimeoutHandler *handler);
	virtual ~BTimer();

	inline int isTiming() const { return m_timing; } 
	inline int doOnce() const { return m_once; }

	inline const timeval &getTimeout() const { return m_timeout; }
	inline const timeval &getStartTime() const { return m_start; }

	inline void fireOnce(bool once) { m_once = once; }
	/// set timeout
	void setTimeout(long val);
	/// set timeout 
	void setTimeout(timeval val);
	/// start timing
	void start();
	/// stop timing
	void stop();
	/// update all timers
	static void updateTimers(int file_descriptor);

protected:
	/// force a timeout
	void fireTimeout();

private:
	/// add a timer to the static list
	static void addTimer(BTimer *timer);
	/// remove a timer from the static list
	static void removeTimer(BTimer *timer);
	
	typedef std::list<BTimer *> TimerList;
    static TimerList m_timerlist; ///< list of all timers
	
	TimeoutHandler *m_handler; ///< handler
	
	bool m_timing; ///< clock running?
	bool m_once;  ///< do timeout only once?

	timeval m_start;    ///< start time
	timeval m_timeout; ///< time length

};

#endif // TIMER_HH