diff options
Diffstat (limited to 'kern/mach_clock.h')
| -rw-r--r-- | kern/mach_clock.h | 63 |
1 files changed, 50 insertions, 13 deletions
diff --git a/kern/mach_clock.h b/kern/mach_clock.h index e6f746b..93237aa 100644 --- a/kern/mach_clock.h +++ b/kern/mach_clock.h @@ -1,6 +1,5 @@ /* - * - * Copyright (C) 2006 Free Software Foundation, Inc. + * Copyright (C) 2006, 2007 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -16,34 +15,72 @@ * along with this program; if not, write to the Free Software * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * - * Author: Barry deFreese. - */ -/* - * + * Author: Barry deFreese and others. */ #ifndef _KERN_MACH_CLOCK_H_ #define _KERN_MACH_CLOCK_H_ -#include <sys/types.h> -#include <kern/time_out.h> +/* + * Mach time-out and time-of-day facility. + */ + #include <mach/machine/kern_return.h> +#include <mach/time_value.h> +#include <kern/host.h> +#include <kern/queue.h> + + +/* Timers in kernel. */ +extern unsigned long elapsed_ticks; /* number of ticks elapsed since bootup */ +extern int hz; /* number of ticks per second */ +extern int tick; /* number of usec per tick */ + + +/* Time-out element. */ +struct timer_elt { + queue_chain_t chain; /* chain in order of expiration */ + int (*fcn)(); /* function to call */ + char * param; /* with this parameter */ + unsigned long ticks; /* expiration time, in ticks */ + int set; /* unset | set | allocated */ +}; +#define TELT_UNSET 0 /* timer not set */ +#define TELT_SET 1 /* timer set */ +#define TELT_ALLOC 2 /* timer allocated from pool */ + +typedef struct timer_elt timer_elt_data_t; +typedef struct timer_elt *timer_elt_t; + extern void clock_interrupt( int usec, boolean_t usermode, boolean_t basepri); -extern void softclock(); +extern void softclock (void); +/* For `private' timer elements. */ extern void set_timeout( timer_elt_t telt, unsigned int interval); - extern boolean_t reset_timeout(timer_elt_t telt); -extern void init_timeout(); +#define set_timeout_setup(telt,fcn,param,interval) \ + ((telt)->fcn = (fcn), \ + (telt)->param = (param), \ + (telt)->private = TRUE, \ + set_timeout((telt), (interval))) + +#define reset_timeout_check(t) \ + MACRO_BEGIN \ + if ((t)->set) \ + reset_timeout((t)); \ + MACRO_END +extern void init_timeout (void); + +/* Read the current time into STAMP. */ extern void record_time_stamp (time_value_t *stamp); extern kern_return_t host_get_time( @@ -59,10 +96,10 @@ extern kern_return_t host_adjust_time( time_value_t new_adjustment, time_value_t *old_adjustment); -extern void mapable_time_init(); +extern void mapable_time_init (void); +/* For public timer elements. */ extern void timeout(int (*fcn)(), char *param, int interval); - extern boolean_t untimeout(int (*fcn)(), char *param); #endif /* _KERN_MACH_CLOCK_H_ */ |