1 /* $NetBSD: rwlock_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_RWLOCK_IMPL_H 33 #define _COMPAT_OPENSOLARIS_SYS_RWLOCK_IMPL_H 34 35 #define __RWLOCK_PRIVATE 36 #include <sys/rwlock.h> 37 38 #define _RW_READ_HELD(rw) ((((rw)->rw_owner & RW_WRITE_LOCKED) == 0) && \ 39 (((rw)->rw_owner & RW_THREAD) != 0)) 40 #define _RW_WRITE_HELD(rw) \ 41 (((rw)->rw_owner & RW_THREAD) && \ 42 ((rw)->rw_owner & RW_WRITE_LOCKED)) 43 #define _RW_ISWRITER(rw) \ 44 (((rw)->rw_owner & RW_WRITE_LOCKED) && \ 45 (((rw)->rw_owner & RW_THREAD) == \ 46 (uintptr_t)curlwp)) 47 48 #endif 49