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    1: /*	$NetBSD: schedule.h,v 1.8 2009/08/17 12:00:53 vanhu Exp $	*/
    2: 
    3: /* Id: schedule.h,v 1.5 2006/05/03 21:53:42 vanhu Exp */
    4: 
    5: /*
    6:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    7:  * Copyright (C) 2008 Timo Teras.
    8:  * All rights reserved.
    9:  * 
   10:  * Redistribution and use in source and binary forms, with or without
   11:  * modification, are permitted provided that the following conditions
   12:  * are met:
   13:  * 1. Redistributions of source code must retain the above copyright
   14:  *    notice, this list of conditions and the following disclaimer.
   15:  * 2. Redistributions in binary form must reproduce the above copyright
   16:  *    notice, this list of conditions and the following disclaimer in the
   17:  *    documentation and/or other materials provided with the distribution.
   18:  * 3. Neither the name of the project nor the names of its contributors
   19:  *    may be used to endorse or promote products derived from this software
   20:  *    without specific prior written permission.
   21:  * 
   22:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   23:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   26:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32:  * SUCH DAMAGE.
   33:  */
   34: 
   35: #ifndef _SCHEDULE_H
   36: #define _SCHEDULE_H
   37: 
   38: #include <stddef.h>
   39: 
   40: #include <sys/queue.h>
   41: #if TIME_WITH_SYS_TIME
   42: # include <sys/time.h>
   43: # include <time.h>
   44: #else
   45: # if HAVE_SYS_TIME_H
   46: #  include <sys/time.h>
   47: # else
   48: #  include <time.h>
   49: # endif
   50: #endif
   51: #include "gnuc.h"
   52: 
   53: #ifndef offsetof
   54: #ifdef __compiler_offsetof
   55: #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
   56: #else
   57: #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
   58: #endif
   59: #endif
   60: 
   61: #ifndef container_of
   62: #define container_of(ptr, type, member) ({                      \
   63:         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
   64:         (type *)( (char *)__mptr - offsetof(type,member) );})
   65: #endif
   66: 
   67: 
   68: /* scheduling table */
   69: /* the head is the nearest event. */
   70: struct sched {
   71: 	void (*func) __P((struct sched *));	/* callback on timeout */
   72: 	struct timeval xtime;			/* expiration time */
   73: 	struct timeval tick;			/* relative timeout */
   74: 	TAILQ_ENTRY(sched) chain;
   75: 	long id;				/* for debug */
   76: };
   77: 
   78: #define SCHED_INITIALIZER() { NULL, }
   79: 
   80: struct scheddump {
   81: 	time_t xtime;
   82: 	long id;
   83: 	time_t created;
   84: 	time_t tick;
   85: };
   86: 
   87: time_t sched_monotonic_to_time_t __P((struct timeval *tv,
   88: 				      struct timeval *now));
   89: void sched_get_monotonic_time __P((struct timeval *tv));
   90: 
   91: struct timeval *schedular __P((void));
   92: void sched_schedule __P((struct sched *, time_t,
   93: 			 void (*func) __P((struct sched *))));
   94: void sched_cancel __P((struct sched *));
   95: 
   96: int sched_dump __P((caddr_t *, int *));
   97: void sched_init __P((void));
   98: 
   99: #endif /* _SCHEDULE_H */