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Annotation of xinu/sys/sreset.c, revision 1.1.1.2

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:        int     pid;
                     19:        int     slist;
                     20: 
1.1.1.2 ! root       21: #ifdef DEBUG
        !            22:        dotrace("sreset", &sem, 1);
        !            23: #endif
        !            24:        disable();
1.1       root       25:        if (isbadsem(sem) || count<0 || semaph[sem].sstate==SFREE) {
1.1.1.2 ! root       26:                restore();
1.1       root       27:                return(SYSERR);
                     28:        }
                     29:        sptr = &semaph[sem];
                     30:        slist = sptr->sqhead;
                     31:        while ((pid=getfirst(slist)) != EMPTY)
                     32:                ready(pid,RESCHNO);
                     33:        sptr->semcnt = count;
                     34:        resched();
1.1.1.2 ! root       35:        restore();
1.1       root       36:        return(OK);
                     37: }

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