kern_lock.c (99c9d3490b96615ab51aacd966105d36b2841187) kern_lock.c (6bdfe06ad9337a33a402bc933006265c30980780)
1/*
2 * Copyright (c) 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Copyright (C) 1997
6 * John S. Dyson. All rights reserved.
7 *
8 * This code contains ideas from software contributed to Berkeley by

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506 lkp->lk_timo = timo;
507 lkp->lk_lockholder = LK_NOPROC;
508}
509
510/*
511 * Determine the status of a lock.
512 */
513int
1/*
2 * Copyright (c) 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Copyright (C) 1997
6 * John S. Dyson. All rights reserved.
7 *
8 * This code contains ideas from software contributed to Berkeley by

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506 lkp->lk_timo = timo;
507 lkp->lk_lockholder = LK_NOPROC;
508}
509
510/*
511 * Determine the status of a lock.
512 */
513int
514lockstatus(lkp)
514lockstatus(lkp, p)
515 struct lock *lkp;
515 struct lock *lkp;
516 struct proc *p;
516{
517 int lock_type = 0;
518
519 simple_lock(&lkp->lk_interlock);
517{
518 int lock_type = 0;
519
520 simple_lock(&lkp->lk_interlock);
520 if (lkp->lk_exclusivecount != 0)
521 lock_type = LK_EXCLUSIVE;
522 else if (lkp->lk_sharecount != 0)
521 if (lkp->lk_exclusivecount != 0) {
522 if (p == NULL || lkp->lk_lockholder == p->p_pid)
523 lock_type = LK_EXCLUSIVE;
524 else
525 lock_type = LK_EXCLOTHER;
526 } else if (lkp->lk_sharecount != 0)
523 lock_type = LK_SHARED;
524 simple_unlock(&lkp->lk_interlock);
525 return (lock_type);
526}
527
528/*
529 * Determine the number of holders of a lock.
530 */

--- 127 unchanged lines hidden --- 		527 lock_type = LK_SHARED;
528 simple_unlock(&lkp->lk_interlock);
529 return (lock_type);
530}
531
532/*
533 * Determine the number of holders of a lock.
534 */

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