1 #include <u.h>
2 #define NOPLAN9DEFINES
3 #include <sys/param.h>
4 #include <sys/time.h>
5 #include <sched.h>
6 #include <libc.h>
7 
8 #if defined(__NetBSD__) || (defined(__OpenBSD__) && OpenBSD <= 200511)
9 #	define sched_yield() \
10 		do{ struct timespec ts; \
11 			ts.tv_sec = 0; \
12 			ts.tv_nsec = 0; \
13 			nanosleep(&ts, 0); \
14 		}while(0)
15 #endif
16 
17 int
18 p9sleep(long milli)
19 {
20 	struct timeval tv;
21 
22 	if(milli == 0){
23 		sched_yield();
24 		return 0;
25 	}
26 
27 	tv.tv_sec = milli/1000;
28 	tv.tv_usec = (milli%1000)*1000;
29 	return select(0, 0, 0, 0, &tv);
30 }
31 
32 long
33 p9alarm(ulong milli)
34 {
35 	struct itimerval itv;
36 	struct itimerval oitv;
37 
38 	itv.it_interval.tv_sec = 0;
39 	itv.it_interval.tv_usec = 0;
40 	itv.it_value.tv_sec = milli/1000;
41 	itv.it_value.tv_usec = (milli%1000)*1000;
42 	if(setitimer(ITIMER_REAL, &itv, &oitv) < 0)
43 		return -1;
44 	return oitv.it_value.tv_sec*1000+oitv.it_value.tv_usec/1000;
45 }