1 extern int timer_start;

2

3 #define timer_start_period(cycles) \

4 timer_start = cycles;

5

6 #define timer_end_period(cycles) \

7 do \

8 { \

9 int diff = timer_start - cycles; \

10 timer_count -= diff; \

11 timer_start = cycles; \

12 if (timer_count <= 0) \

13 { \

14 timer_process(); \

15 timer_update_outstanding(); \

16 } \

17 } while (0)

18

19 #define timer_clock() \

20 do \

21 { \

22 int diff = timer_start - cycles; \

23 timer_count -= diff; \

24 timer_start = cycles; \

25 timer_process(); \

26 timer_update_outstanding(); \

27 } while (0)

28

29 void timer_process();

30 void timer_update_outstanding();

31 void timer_reset();

32 int timer_add(void (*callback)(void *priv), int *count, int *enable, void *priv);

33 void timer_set_callback(int timer, void (*callback)(void *priv));

34

35 #define TIMER_ALWAYS_ENABLED &timer_one

36

37 extern int timer_count;

38 extern int timer_one;

39

40 #define TIMER_SHIFT 6

41

42 extern int TIMER_USEC;