resume.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 84 行

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1.3
date	97.09.21.19.29.30;	author dls;	state Dist;
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1.2
date	94.05.07.19.26.36;	author dls;	state Works;
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1.1
date	94.05.06.03.12.23;	author dls;	state Works;
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@pre-3e code
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@/* resume.c - resume */

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

/*------------------------------------------------------------------------
 * resume  --  unsuspend a process, making it ready; return the priority
 *------------------------------------------------------------------------
 */
SYSCALL resume(pid)
	int	pid;
{
	STATWORD ps;    
	struct	pentry	*pptr;		/* pointer to proc. tab. entry	*/
	int	prio;			/* priority to return		*/

	disable(ps);
	if (isbadpid(pid) || (pptr= &proctab[pid])->pstate!=PRSUSP) {
		restore(ps);
		return(SYSERR);
	}
	prio = pptr->pprio;
	ready(pid, RESCHYES);
	restore(ps);
	return(prio);
}
@


1.2
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@*** empty log message ***
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@a18 1
kprintf("resume: (pid %d) ps %x\n", pid, ps[0]);
a24 1
kprintf("resume: (pid %d) restore ps %x\n", pid, ps[0]);
@


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@Initial revision
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@d19 1
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