1 #include <unistd.h>

2 #include <sys/time.h>

3

4 unsigned long get_msec()

5 {

6 static struct timeval tv0;

7 struct timeval tv;

8

9 gettimeofday(&tv, 0);

10 if(tv0.tv_sec == 0 && tv0.tv_usec == 0) {

11 tv0 = tv;

12 return 0;

13 }

14 return (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;

15 }

16

17 void wait_for(unsigned long msec)

18 {

19 usleep(msec * 1000);

20 }