/* * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (C) 1998 Apple Computer * All Rights Reserved */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* * File: kern/simple_lock.h (derived from kern/lock.h) * Author: Avadis Tevanian, Jr., Michael Wayne Young * Date: 1985 * * Atomic primitives and Simple Locking primitives definitions */ #ifdef KERNEL_PRIVATE #ifndef _KERN_SIMPLE_LOCK_H_ #define _KERN_SIMPLE_LOCK_H_ #include <sys/cdefs.h> #include <mach/boolean.h> #include <kern/kern_types.h> #include <machine/simple_lock.h> #ifdef MACH_KERNEL_PRIVATE #include <mach_ldebug.h> extern void hw_lock_init( hw_lock_t); extern void hw_lock_lock( hw_lock_t); extern void hw_lock_unlock( hw_lock_t); extern unsigned int hw_lock_to( hw_lock_t, unsigned int); extern unsigned int hw_lock_try( hw_lock_t); extern unsigned int hw_lock_held( hw_lock_t); #endif /* MACH_KERNEL_PRIVATE */ __BEGIN_DECLS extern uint32_t hw_atomic_add( volatile uint32_t *dest, uint32_t delt); extern uint32_t hw_atomic_sub( volatile uint32_t *dest, uint32_t delt); extern uint32_t hw_atomic_or( volatile uint32_t *dest, uint32_t mask); extern uint32_t hw_atomic_and( volatile uint32_t *dest, uint32_t mask); /* * Variant of hw_atomic_or which doesn't return a value; potentially * more efficient on some platforms. */ extern void hw_atomic_or_noret( volatile uint32_t *dest, uint32_t mask); /* * Variant of hw_atomic_and which doesn't return a value; potentially * more efficient on some platforms. */ extern void hw_atomic_and_noret( volatile uint32_t *dest, uint32_t mask); extern uint32_t hw_compare_and_store( uint32_t oldval, uint32_t newval, volatile uint32_t *dest); extern void hw_queue_atomic( unsigned int *anchor, unsigned int *elem, unsigned int disp); extern void hw_queue_atomic_list( unsigned int *anchor, unsigned int *first, unsigned int *last, unsigned int disp); extern unsigned int *hw_dequeue_atomic( unsigned int *anchor, unsigned int disp); extern void usimple_lock_init( usimple_lock_t, unsigned short); extern void usimple_lock( usimple_lock_t); extern void usimple_unlock( usimple_lock_t); extern unsigned int usimple_lock_try( usimple_lock_t); __END_DECLS #define ETAP_NO_TRACE 0 #define ETAP_IO_AHA 0 /* * If we got to here and we still don't have simple_lock_init * defined, then we must either be outside the osfmk component, * running on a true SMP, or need debug. */ #if !defined(simple_lock_init) #define simple_lock_init(l,t) usimple_lock_init(l,t) #define simple_lock(l) usimple_lock(l) #define simple_unlock(l) usimple_unlock(l) #define simple_lock_try(l) usimple_lock_try(l) #define simple_lock_addr(l) (&(l)) #define thread_sleep_simple_lock(l, e, i) \ thread_sleep_usimple_lock((l), (e), (i)) #endif /* !defined(simple_lock_init) */ #endif /*!_KERN_SIMPLE_LOCK_H_*/ #endif /* KERNEL_PRIVATE */