Xinu7/src/serve11/sys/sleep10.c

/* sleep10.c - sleep10 */

#include <conf.h>
#include <kernel.h>
#include <proc.h>
#include <q.h>
#include <sleep.h>

/*------------------------------------------------------------------------
 * sleep10  --  delay the caller for a time specified in tenths of seconds
 *------------------------------------------------------------------------
 */
SYSCALL	sleep10(n)
	int n;
{
	char ps;

	if (n < 0  || clkruns==0)
		return(SYSERR);
        disable(ps);
	if (n == 0) {			/* sleep10(0) -> end time slice	*/
		;
	} else {
	        insertd(currpid,clockq,n);
		slnempty = TRUE;
		sltop = (int *) & q[q[clockq].qnext].qkey;
	        proctab[currpid].pstate = PRSLEEP;
	}
	resched();
        restore(ps);
	return(OK);
}