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Annotation of xinu/sys/resume.c, revision 1.1.1.1

1.1       root        1: /* resume.c - resume */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <proc.h>
                      6: 
                      7: /*------------------------------------------------------------------------
                      8:  * resume  --  unsuspend a process, making it ready; return the priority
                      9:  *------------------------------------------------------------------------
                     10:  */
                     11: SYSCALL resume(pid)
                     12:        int     pid;
                     13: {
                     14:        PStype  ps;                     /* saved processor status       */
                     15:        struct  pentry  *pptr;          /* pointer to proc. tab. entry  */
                     16:        int     prio;                   /* priority to return           */
                     17: 
                     18:        disable(ps);
                     19:        if (isbadpid(pid) || (pptr = &proctab[pid])->pstate != PRSUSP) {
                     20:                restore(ps);
                     21:                return(SYSERR);
                     22:        }
                     23:        prio = pptr->pprio;
                     24:        ready(pid, RESCHYES);
                     25:        restore(ps);
                     26:        return(prio);
                     27: }

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