Mercurial > illumos > illumos-gate
view usr/src/lib/libc/amd64/gen/lock.s @ 7298:b69e27387f74
6733918 Teamware has retired, please welcome your new manager, Mercurial
4758439 some files use "current date" sccs keywords
6560843 asm sources should not rely on .file "%M%" for naming STT_FILE symbols
6560958 Solaris:: perl modules should not use SCCS keywords in version information
6729074 webrev doesn't deal well with remote ssh hg parents
author | Mark J. Nelson <Mark.J.Nelson@Sun.COM> |
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date | Wed, 06 Aug 2008 16:29:39 -0600 |
parents | 68f95e015346 |
children |
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/* * 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.h" / / _lock_try(lp) / - returns non-zero on success. / ENTRY(_lock_try) movl $1,%eax xchgb %al, (%rdi) xorb $1, %al ret SET_SIZE(_lock_try) / / _lock_clear(lp) / - clear lock and force it to appear unlocked in memory. / ENTRY(_lock_clear) movb $0, (%rdi) ret SET_SIZE(_lock_clear)