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

1.1       root        1: /* sreset.c - sreset */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <proc.h>
                      6: #include <q.h>
                      7: #include <sem.h>
                      8: 
                      9: /*------------------------------------------------------------------------
                     10:  *  sreset  --  reset the count and queue of a semaphore
                     11:  *------------------------------------------------------------------------
                     12:  */
                     13: SYSCALL sreset(sem,count)
                     14:        int     sem;
                     15:        int     count;
                     16: {
                     17:        struct  sentry  *sptr;
                     18:        PStype  ps;
                     19:        int     pid;
                     20:        int     slist;
                     21: 
                     22:        disable(ps);
                     23:        if (isbadsem(sem) || count<0 || semaph[sem].sstate==SFREE) {
                     24:                restore(ps);
                     25:                return(SYSERR);
                     26:        }
                     27:        sptr = &semaph[sem];
                     28:        slist = sptr->sqhead;
                     29:        while ((pid=getfirst(slist)) != EMPTY)
                     30:                ready(pid,RESCHNO);
                     31:        sptr->semcnt = count;
                     32:        resched();
                     33:        restore(ps);
                     34:        return(OK);
                     35: }

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