1 /* $NetBSD: mutex_impl.h,v 1.1 2010/02/21 01:46:36 darran Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe and Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _COMPAT_OPENSOLARIS_SYS_MUTEX_IMPL_H 33 #define _COMPAT_OPENSOLARIS_SYS_MUTEX_IMPL_H 34 35 #define __MUTEX_PRIVATE 36 #include <sys/mutex.h> 37 38 #define mtx_owner u.mtxa_owner 39 #define MUTEX_THREAD ((uintptr_t)-16L) 40 #define MUTEX_OWNER(mtx) \ 41 ((mtx)->mtx_owner & MUTEX_THREAD) 42 #define MUTEX_NO_OWNER 0 43 44 #define MUTEX_BIT_SPIN 0x01 45 #define MUTEX_TYPE_ADAPTIVE(mtx) (((mtx)->mtx_owner & MUTEX_BIT_SPIN) == 0) 46 #define MUTEX_TYPE_SPIN(mtx) (((mtx)->mtx_owner & MUTEX_BIT_SPIN) != 0) 47 48 #endif 49