sleep.c,v
来自「TCP-IP红宝书源代码」· C,V 代码 · 共 57 行
C,V
57 行
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comment @ * @;
1.1
date 97.09.21.19.29.30; author dls; state Dist;
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1.1
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@pre-3e code
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@/* sleep.c - sleep */
#include <conf.h>
#include <kernel.h>
#include <proc.h>
#include <q.h>
#include <sleep.h>
/*------------------------------------------------------------------------
* sleep -- delay the calling process n seconds
*------------------------------------------------------------------------
*/
SYSCALL sleep(n)
int n;
{
STATWORD ps;
if (n<0 || clkruns==0)
return(SYSERR);
if (n == 0) {
disable(ps);
resched();
restore(ps);
return(OK);
}
while (n >= 1000) {
sleep10(10000);
n -= 1000;
}
if (n > 0)
sleep10(10*n);
return(OK);
}
@
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