NetBSD/usr.sbin/rtadvd/timer.h

/*	$NetBSD: timer.h,v 1.7 2011/12/10 19:14:29 roy Exp $	*/
/*	$KAME: timer.h,v 1.5 2002/05/31 13:30:38 jinmei Exp $	*/

/*
 * Copyright (C) 1998 WIDE Project.
 * 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 must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* a < b */
#define TIMEVAL_LT(a, b) (((a).tv_sec < (b).tv_sec) ||\
			  (((a).tv_sec == (b).tv_sec) && \
			    ((a).tv_usec < (b).tv_usec)))

/* a <= b */
#define TIMEVAL_LEQ(a, b) (((a).tv_sec < (b).tv_sec) ||\
			   (((a).tv_sec == (b).tv_sec) &&\
 			    ((a).tv_usec <= (b).tv_usec)))

extern TAILQ_HEAD(rtadvd_timer_head_t, rtadvd_timer) ra_timer;
struct rtadvd_timer {
	TAILQ_ENTRY(rtadvd_timer) next;
	struct rainfo *rai;
	struct timeval tm;

	struct rtadvd_timer *(*expire) (void *); /* expiration function */
	void *expire_data;
	void (*update) __P((void *, struct timeval *));	/* update function */
	void *update_data;
};

void rtadvd_timer_init(void);
struct rtadvd_timer *rtadvd_add_timer(struct rtadvd_timer *(*) (void *),
		void (*) (void *, struct timeval *), void *, void *);
void rtadvd_set_timer(struct timeval *, struct rtadvd_timer *);
void rtadvd_remove_timer(struct rtadvd_timer **);
struct timeval * rtadvd_check_timer(void);
struct timeval * rtadvd_timer_rest(struct rtadvd_timer *);
void TIMEVAL_ADD(struct timeval *, struct timeval *,
		      struct timeval *);
void TIMEVAL_SUB(struct timeval *, struct timeval *,
		      struct timeval *);