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Diffstat (limited to 'console-client/timer.h')
-rw-r--r-- | console-client/timer.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/console-client/timer.h b/console-client/timer.h new file mode 100644 index 00000000..4204192e --- /dev/null +++ b/console-client/timer.h @@ -0,0 +1,72 @@ +/* timer.h - Interface to a timer module for Mach. + Copyright (C) 1995,96,2000,02 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG and Marcus Brinkmann. + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + +#ifndef _TIMER_H_ +#define _TIMER_H_ + +#include <errno.h> +#include <maptime.h> + + +/* Initialize the timer component. Must be called once at startup. */ +error_t timer_init (void); + +/* The data structure of a timer. A user can set the values EXPIRES, + DATA and FUNCTION, and should leave the other fields alone. */ +struct timer_list +{ + struct timer_list *next, **prev; /* things like to test "T->prev != NULL" */ + long long expires; + + /* The function to be called when the timer expires. If the + function returns a non-zero value, the timer is put back on the + list. */ + int (*fnc) (void *); + void *fnc_data; +}; + +/* Initialize the timer TIMER. */ +void timer_clear (struct timer_list *timer); + +/* Add the timer TIMER to the list. */ +void timer_add (struct timer_list *timer); + +/* Remove the timer TIMER from the list. */ +int timer_remove (struct timer_list *timer); + +/* Change the expiration time of the timer TIMER to EXPIRES. */ +void timer_change (struct timer_list *timer, long long expires); + +extern inline long long +fetch_jiffies () +{ + extern volatile struct mapped_time_value *timer_mapped_time; + extern long long timer_root_jiffies; + struct timeval tv; + long long j; + + maptime_read (timer_mapped_time, &tv); + +#define HZ 100 + j = (long long) tv.tv_sec * HZ + ((long long) tv.tv_usec * HZ) / 1000000; + return j - timer_root_jiffies; +} + +#endif /* _TIMER_H_ */ |