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- #ifndef _TIMER_H
- #define _TIMER_H
-
- #ifndef _GLOBAL_H
- #include "global.h"
- #endif
-
- /* Software timers
- * There is one of these structures for each simulated timer.
- * Whenever the timer is running, it is on a linked list
- * pointed to by "Timers". The list is sorted in ascending order of
- * expiration, with the first timer to expire at the head. This
- * allows the timer process to avoid having to scan the entire list
- * on every clock tick; once it finds an unexpired timer, it can
- * stop searching.
- *
- * Stopping a timer or letting it expire causes it to be removed
- * from the list. Starting a timer puts it on the list at the right
- * place.
- */
- struct timer {
- struct timer *next; /* Linked-list pointer */
- int32 duration; /* Duration of timer, in ticks */
- int32 expiration; /* Clock time at expiration */
- void (*func) __ARGS((void *)); /* Function to call at expiration */
- void *arg; /* Arg to pass function */
- char state; /* Timer state */
- #define TIMER_STOP 0
- #define TIMER_RUN 1
- #define TIMER_EXPIRE 2
- };
- #define NULLTIMER (struct timer *)0
- #define MAX_TIME (int32)4294967295 /* Max long integer */
- #ifndef MSPTICK
- #define MSPTICK 55 /* Milliseconds per tick */
- #endif
- /* Useful user macros that hide the timer structure internals */
- #define dur_timer(t) ((t)->duration*MSPTICK)
- #define run_timer(t) ((t)->state == TIMER_RUN)
-
- extern int Tick;
- extern void (*Cfunc[])(); /* List of clock tick functions */
-
- /* In timer.c: */
- void alarm __ARGS((int32 ms));
- int pause __ARGS((int32 ms));
- int32 read_timer __ARGS((struct timer *t));
- void set_timer __ARGS((struct timer *t,int32 x));
- void start_timer __ARGS((struct timer *t));
- void stop_timer __ARGS((struct timer *timer));
- char *tformat __ARGS((int32 t));
-
- /* In hardware.c: */
- int32 msclock __ARGS((void));
- int32 secclock __ARGS((void));
-
- #endif /* _TIMER_H */
-