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 54574Sraf * Common Development and Distribution License (the "License"). 64574Sraf * 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 */ 214574Sraf 220Sstevel@tonic-gate/* 236515Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 240Sstevel@tonic-gate * Use is subject to license terms. 250Sstevel@tonic-gate */ 260Sstevel@tonic-gate 27*7298SMark.J.Nelson@Sun.COM .file "_lwp_mutex_unlock.s" 280Sstevel@tonic-gate 290Sstevel@tonic-gate#include "SYS.h" 300Sstevel@tonic-gate#include <../assym.h> 310Sstevel@tonic-gate 320Sstevel@tonic-gate ENTRY(_lwp_mutex_unlock) 330Sstevel@tonic-gate movq %rdi, %rax 340Sstevel@tonic-gate addq $MUTEX_LOCK_WORD, %rax 350Sstevel@tonic-gate xorl %ecx, %ecx 360Sstevel@tonic-gate xchgl (%rax), %ecx /* clear lock and get old lock into %ecx */ 370Sstevel@tonic-gate andl $WAITER_MASK, %ecx /* was anyone waiting on it? */ 380Sstevel@tonic-gate je 1f 394574Sraf xorl %esi, %esi 404574Sraf SYSTRAP_RVAL1(lwp_mutex_wakeup) /* lwp_mutex_wakeup(mp, 0) */ 410Sstevel@tonic-gate SYSLWPERR 420Sstevel@tonic-gate RET 430Sstevel@tonic-gate1: 440Sstevel@tonic-gate RETC 450Sstevel@tonic-gate SET_SIZE(_lwp_mutex_unlock) 46