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" 306812Sraf#include <../assym.h> 310Sstevel@tonic-gate 320Sstevel@tonic-gate ENTRY(_lwp_mutex_unlock) 330Sstevel@tonic-gate movl 4(%esp), %eax 340Sstevel@tonic-gate addl $MUTEX_LOCK_WORD, %eax 350Sstevel@tonic-gate xorl %ecx, %ecx 360Sstevel@tonic-gate xchgl (%eax), %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 movl 0(%esp), %ecx / prepare to call lwp_mutex_wakeup() 404574Sraf movl 4(%esp), %edx 414574Sraf movl $0, 4(%esp) 424574Sraf movl %edx, 0(%esp) 434574Sraf pushl %ecx 444574Sraf SYSTRAP_RVAL1(lwp_mutex_wakeup) / lwp_mutex_wakeup(mp, 0) 454574Sraf popl %ecx / reconstruct the stack frame 464574Sraf movl 0(%esp), %edx 474574Sraf movl %edx, 4(%esp) 484574Sraf movl %ecx, 0(%esp) 490Sstevel@tonic-gate SYSLWPERR 500Sstevel@tonic-gate RET 510Sstevel@tonic-gate1: 520Sstevel@tonic-gate RETC 530Sstevel@tonic-gate SET_SIZE(_lwp_mutex_unlock) 54