/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

        .file   "lock.s"

#include <sys/asm_linkage.h>

/*
 * lock_try(lp)
 *      - returns non-zero on success.
 */
        ENTRY(_lock_try)
        ldstub  [%o0], %o1              ! try to set lock, get value in %o1
        membar  #LoadLoad
        retl
          xor   %o1, 0xff, %o0          ! delay - return non-zero if success
        SET_SIZE(_lock_try)

/*
 * lock_clear(lp)
 *      - clear lock.
 */
        ENTRY(_lock_clear)
        membar  #LoadStore|#StoreStore
        retl
          clrb  [%o0]
        SET_SIZE(_lock_clear)