File: [local] / prex / sys / include / timer.h (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:46:56 2008 UTC (16 years ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*-
* Copyright (c) 2005-2007, Kohsuke Ohtani
* 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 author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#ifndef _TIMER_H
#define _TIMER_H
#include <event.h>
struct timer {
struct list link; /* linkage on timer chain */
int active; /* true if active */
u_long expire; /* expire time (ticks) */
u_long interval; /* time interval */
struct event event; /* event for this timer */
void (*func)(void *); /* function to call */
void *arg; /* function argument */
};
/*
* Macro to compare two timer counts.
* time_after() returns true if a is after b.
*/
#define time_after(a,b) (((long)(b) - (long)(a)) < 0)
#define time_before(a,b) time_after(b,a)
#define time_after_eq(a,b) (((long)(a) - (long)(b)) >= 0)
#define time_before_eq(a,b) time_after_eq(b,a)
/*
* Macro to convert milliseconds and tick.
*/
#define msec_to_tick(ms) (((ms) >= 0x20000) ? \
((ms) / 1000UL) * HZ : ((ms) * HZ) / 1000UL)
#define tick_to_msec(tick) (((tick) * 1000) / HZ)
extern void timer_callout(struct timer *, u_long, void (*)(void *),
void *);
extern void timer_stop(struct timer *);
extern u_long timer_delay(u_long);
extern int timer_sleep(u_long, u_long *);
extern int timer_alarm(u_long, u_long *);
extern int timer_periodic(struct thread *, u_long, u_long);
extern int timer_waitperiod(void);
extern void timer_cleanup(struct thread *);
extern int timer_hook(void (*)(int));
extern void timer_tick(void);
extern u_long timer_count(void);
extern void timer_info(struct info_timer *);
extern void timer_init(void);
#endif /* !_TIMER_H */