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Annotation of prex-old/sys/include/timer.h, Revision 1.1.1.1.2.1

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 2005-2007, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #ifndef _TIMER_H
                     31: #define _TIMER_H
                     32:
                     33: #include <event.h>
                     34:
                     35: struct timer {
                     36:        struct list     link;           /* linkage on timer chain */
                     37:        int             active;         /* true if active */
                     38:        u_long          expire;         /* expire time (ticks) */
                     39:        u_long          interval;       /* time interval */
                     40:        struct event    event;          /* event for this timer */
                     41:        void (*func)(void *);           /* function to call */
                     42:        void            *arg;           /* function argument */
                     43: };
                     44:
                     45: /*
                     46:  * Macro to compare two timer counts.
                     47:  * time_after() returns true if a is after b.
                     48:  */
                     49: #define time_after(a,b)                (((long)(b) - (long)(a)) < 0)
                     50: #define time_before(a,b)       time_after(b,a)
                     51:
                     52: #define time_after_eq(a,b)     (((long)(a) - (long)(b)) >= 0)
                     53: #define time_before_eq(a,b)    time_after_eq(b,a)
                     54:
                     55: /*
                     56:  * Macro to convert milliseconds and tick.
                     57:  */
                     58: #define msec_to_tick(ms)       (((ms) >= 0x20000) ? \
                     59:                                 ((ms) / 1000UL) * HZ : ((ms) * HZ) / 1000UL)
                     60:
                     61: #define tick_to_msec(tick)     (((tick) * 1000) / HZ)
                     62:
                     63:
1.1.1.1.2.1! nbrk       64: extern void     timer_callout(struct timer *, u_long, void (*)(void *),
        !            65:                               void *);
1.1       nbrk       66: extern void     timer_stop(struct timer *);
                     67: extern u_long   timer_delay(u_long);
                     68: extern int      timer_sleep(u_long, u_long *);
                     69: extern int      timer_alarm(u_long, u_long *);
                     70: extern int      timer_periodic(struct thread *, u_long, u_long);
                     71: extern int      timer_waitperiod(void);
                     72: extern void     timer_cleanup(struct thread *);
                     73: extern int      timer_hook(void (*)(int));
                     74: extern void     timer_tick(void);
                     75: extern u_long   timer_count(void);
                     76: extern void     timer_info(struct info_timer *);
                     77: extern void     timer_init(void);
                     78:
                     79: #endif /* !_TIMER_H */