GopherProxy

	sleep.c - 9base - revived minimalist port of Plan 9 userland to Unix
	git clone git://git.suckless.org/9base
	Log
	Files
	Refs
	README
	LICENSE
	---
	sleep.c (889B)
	---
	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 <= 200611)
	9 #if !defined(sched_yield)
	10 # define sched_yield() \
	11 do{ struct timespec ts; \
	12 ts.tv_sec = 0; \
	13 ts.tv_nsec = 0; \
	14 nanosleep(&ts, 0); \
	15 }while(0)
	16 #endif
	17 #endif
	18
	19 int
	20 p9sleep(long milli)
	21 {
	22 struct timeval tv;
	23
	24 if(milli == 0){
	25 sched_yield();
	26 return 0;
	27 }
	28
	29 tv.tv_sec = milli/1000;
	30 tv.tv_usec = (milli%1000)*1000;
	31 return select(0, 0, 0, 0, &tv);
	32 }
	33
	34 long
	35 p9alarm(ulong milli)
	36 {
	37 struct itimerval itv;
	38 struct itimerval oitv;
	39
	40 itv.it_interval.tv_sec = 0;
	41 itv.it_interval.tv_usec = 0;
	42 itv.it_value.tv_sec = milli/1000;
	43 itv.it_value.tv_usec = (milli%1000)*1000;
	44 if(setitimer(ITIMER_REAL, &itv, &oitv) < 0)
	45 return -1;
	46 return oitv.it_value.tv_sec*1000+oitv.it_value.tv_usec/1000;
	47 }