10Sstevel@tonic-gate/* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7298SMark.J.Nelson@Sun.COM * Common Development and Distribution License (the "License"). 6*7298SMark.J.Nelson@Sun.COM * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate/* 220Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 230Sstevel@tonic-gate * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 26*7298SMark.J.Nelson@Sun.COM .file "lock.s" 270Sstevel@tonic-gate 280Sstevel@tonic-gate#include "SYS.h" 290Sstevel@tonic-gate 300Sstevel@tonic-gate/ 310Sstevel@tonic-gate/ _lock_try(lp) 320Sstevel@tonic-gate/ - returns non-zero on success. 330Sstevel@tonic-gate/ 340Sstevel@tonic-gate ENTRY(_lock_try) 350Sstevel@tonic-gate movl $1,%eax 360Sstevel@tonic-gate movl 4(%esp),%ecx 370Sstevel@tonic-gate xchgb %al, (%ecx) 380Sstevel@tonic-gate xorb $1, %al 390Sstevel@tonic-gate ret 400Sstevel@tonic-gate SET_SIZE(_lock_try) 410Sstevel@tonic-gate 420Sstevel@tonic-gate/ 430Sstevel@tonic-gate/ _lock_clear(lp) 440Sstevel@tonic-gate/ - clear lock and force it to appear unlocked in memory. 450Sstevel@tonic-gate/ 460Sstevel@tonic-gate ENTRY(_lock_clear) 470Sstevel@tonic-gate movl 4(%esp),%eax 480Sstevel@tonic-gate movb $0, (%eax) 490Sstevel@tonic-gate ret 500Sstevel@tonic-gate SET_SIZE(_lock_clear) 510Sstevel@tonic-gate 52