Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/system/sleep.c

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/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */

#include <kernel.h>
#include <proc.h>
#include <queue.h>
#include <clock.h>

syscall sleep(int ms)
{
        irqmask ps;

#ifdef RTCLOCK
        ASSERT( ms >= 0 );

        if (ms > 0) 
        {
                /* tinkering with processes, no interrupts */
                ps = disable();
                insertd(currpid, sleepq, ms);
                proctab[currpid].state = PRSLEEP;
                restore(ps);
        }

        resched();
        return OK;
#elif
        /* if we have no clock, sleep was an erroneous call */
        return SYSERR;
#endif
}

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