ll-timers.h

一个很好的LINUX底下的GPRS协议栈

/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */

/* By Sandeep Kumar, Kopparapu Suman and Richa Jain, 
 * Indian Institute of Technology, Bombay.
 * June, 2001.
*/ 

/* Copyright (c) 2001 Indian Insitute of Technology, Bombay.  
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code and binary code must contain
 * the above copyright notice, this list of conditions and the following 
 * disclaimer.
 * 
 * 2. All advertising materials mentioning features or use of this software
 * must display the following acknowledgement: 
 * This product includes software developed at Indian Insitute of
 * Technology, Bombay. 
 *
 * 3. The name of the Institute may not be used to endorse or promote 
 * products derived from this software without specific prior written 
 * permission.
 * INDIAN INSTITUTE OF TECHNOLOGY, BOMBAY, MAKES NO REPRESENTATIONS 
 * CONCERNING EITHER THE MERCHANTABILITY OF THIS SOFTWARE OR THE 
 * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE.  The software 
 * is provided "as is" without express or implied warranty of any kind.
*/

#ifndef __ll_timers_h__
#define __ll_timers_h__
class LL;
class LLTimer : public Handler {
public:
	LLTimer(LL* m, double s = 0) : ll(m), slottime(s) {
		busy_ = paused_ = 0; stime = rtime = 0.0;
	}

	virtual void handle(Event *e) = 0;

	virtual void start(double time);
	virtual void stop(void);
	virtual void pause(void) { assert(0); }
	virtual void resume(void) { assert(0); }

	inline int busy(void) { return busy_; }
	inline int paused(void) { return paused_; }
	inline double expire(void) {
		return ((stime + rtime) - Scheduler::instance().clock());
	}

protected:
	LL	*ll;
	int		busy_;
	int		paused_;
	Event		intr;
	double		stime;	// start time
	double		rtime;	// remaining time
	double		slottime;
};

class llTxTimer : public LLTimer {
public:
	llTxTimer(LL *m) : LLTimer(m) {}

	void	handle(Event *e);
};

class llackTimer : public LLTimer {
public:
	llackTimer(LL *m) : LLTimer(m) {}

	void	handle(Event *e);
};


#endif