timer.h
资源名称:export.zip [点击查看]
上传用户:hepax88
上传日期:2007-01-03
资源大小:1101k
文件大小:2k
源码类别:
TCP/IP协议栈
开发平台:
Visual C++
- #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)(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 MAX_TIME (int32)4294967295 /* Max long integer */
- #ifndef MSPTICK
- #define MSPTICK 55 /* Milliseconds per tick */
- #endif
- #ifndef EALARM
- #define EALARM 106
- #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 kalarm(int32 ms);
- int ppause(int32 ms);
- int32 read_timer(struct timer *t);
- void set_timer(struct timer *t,int32 x);
- void start_timer(struct timer *t);
- void stop_timer(struct timer *timer);
- char *tformat(int32 t);
- /* In hardware.c: */
- int32 msclock(void);
- int32 secclock(void);
- int32 usclock(void);
- #endif /* _TIMER_H */