/* signaln.c - signaln */

#include 

/*------------------------------------------------------------------------
 *  signaln  -  Signal a semaphore n times, releasing n waiting processes
 *------------------------------------------------------------------------
 */
syscall signaln(
          sid32         sem,            /* ID of semaphore to signal    */
          int32         count           /* Number of times to signal    */
        )
{
        intmask mask;                   /* Saved interrupt mask         */
        struct  sentry  *semptr;        /* Ptr to sempahore table entry */

        mask = disable();
        if (isbadsem(sem) || (count < 0)) {
                restore(mask);
                return SYSERR;
        }
        semptr = &semtab[sem];
        if (semptr->sstate == S_FREE) {
                restore(mask);
                return SYSERR;
        }

        resched_cntl(DEFER_START);
        for (; count > 0; count--) {
                if ((semptr->scount++) < 0) {
                        ready(dequeue(semptr->squeue));
                }
        }
        resched_cntl(DEFER_STOP);
        restore(mask);
        return OK;
}