11.6Sriastrad/* $NetBSD: mutex.h,v 1.6 2023/07/12 12:50:13 riastradh Exp $ */ 21.1Sjmcneill 31.1Sjmcneill/*- 41.1Sjmcneill * Copyright (c) 2002, 2006 The NetBSD Foundation, Inc. 51.1Sjmcneill * All rights reserved. 61.1Sjmcneill * 71.1Sjmcneill * This code is derived from software contributed to The NetBSD Foundation 81.1Sjmcneill * by Jason R. Thorpe and Andrew Doran. 91.1Sjmcneill * 101.1Sjmcneill * Redistribution and use in source and binary forms, with or without 111.1Sjmcneill * modification, are permitted provided that the following conditions 121.1Sjmcneill * are met: 131.1Sjmcneill * 1. Redistributions of source code must retain the above copyright 141.1Sjmcneill * notice, this list of conditions and the following disclaimer. 151.1Sjmcneill * 2. Redistributions in binary form must reproduce the above copyright 161.1Sjmcneill * notice, this list of conditions and the following disclaimer in the 171.1Sjmcneill * documentation and/or other materials provided with the distribution. 181.1Sjmcneill * 191.1Sjmcneill * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.1Sjmcneill * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.1Sjmcneill * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.1Sjmcneill * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.1Sjmcneill * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.1Sjmcneill * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.1Sjmcneill * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.1Sjmcneill * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.1Sjmcneill * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.1Sjmcneill * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.1Sjmcneill * POSSIBILITY OF SUCH DAMAGE. 301.1Sjmcneill */ 311.1Sjmcneill 321.2Sjmcneill#ifndef _ARCH_USERMODE_INCLUDE_MUTEX_H_ 331.2Sjmcneill#define _ARCH_USERMODE_INCLUDE_MUTEX_H_ 341.1Sjmcneill 351.6Sriastrad#include <sys/types.h> 361.6Sriastrad 371.5Sriastrad#ifdef __MUTEX_PRIVATE 381.5Sriastrad#include <machine/intr.h> 391.5Sriastrad#endif 401.5Sriastrad 411.1Sjmcneillstruct kmutex { 421.1Sjmcneill union { 431.1Sjmcneill volatile uintptr_t mtxa_owner; 441.1Sjmcneill#ifdef __MUTEX_PRIVATE 451.1Sjmcneill struct { 461.1Sjmcneill volatile uint8_t mtxs_dummy; 471.1Sjmcneill ipl_cookie_t mtxs_ipl; 481.1Sjmcneill __cpu_simple_lock_t mtxs_lock; 491.1Sjmcneill volatile uint8_t mtxs_unused; 501.1Sjmcneill } s; 511.1Sjmcneill#endif 521.1Sjmcneill } u; 531.1Sjmcneill}; 541.1Sjmcneill 551.1Sjmcneill#ifdef __MUTEX_PRIVATE 561.1Sjmcneill 571.1Sjmcneill#define mtx_owner u.mtxa_owner 581.1Sjmcneill#define mtx_ipl u.s.mtxs_ipl 591.1Sjmcneill#define mtx_lock u.s.mtxs_lock 601.1Sjmcneill 611.1Sjmcneill#define __HAVE_SIMPLE_MUTEXES 1 621.1Sjmcneill 631.1Sjmcneill#define MUTEX_CAS(p, o, n) \ 641.1Sjmcneill (_atomic_cas_ulong((volatile unsigned long *)(p), (o), (n)) == (o)) 651.1Sjmcneill 661.1Sjmcneillunsigned long _atomic_cas_ulong(volatile unsigned long *, 671.1Sjmcneill unsigned long, unsigned long); 681.1Sjmcneill 691.1Sjmcneill#endif /* __MUTEX_PRIVATE */ 701.1Sjmcneill 711.2Sjmcneill#endif /* _ARCH_USERMODE_INCLUDE_MUTEX_H_ */ 72