98 lines
3 KiB
C
98 lines
3 KiB
C
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/*
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* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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/*
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*
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* History:
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* 11-Feb-1999 Umesh Vaishampayan (umeshv@apple.com)
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* Added atomic_or().
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*
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* 26-Oct-1998 Umesh Vaishampayan (umeshv@apple.com)
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* Made the header c++ friendly.
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*
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* 12-Oct-1998 Umesh Vaishampayan (umeshv@apple.com)
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* Changed simple_ to spin_ so as to coexist with cthreads till
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* the merge to the system framework.
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*
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* 8-Oct-1998 Umesh Vaishampayan (umeshv@apple.com)
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* Created from the kernel code to be in a dynamic shared library.
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* Kernel code created by: Bill Angell (angell@apple.com)
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*/
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#ifndef _ATOMIC_H_
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#define _ATOMIC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Locking routines */
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struct spin_lock { /* sizeof cache line */
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unsigned int lock_data;
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unsigned int pad[7];
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};
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typedef struct spin_lock *spin_lock_t;
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extern void spin_lock_init(spin_lock_t);
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extern void spin_lock_unlock(spin_lock_t);
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extern unsigned int spin_lock_lock(spin_lock_t);
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extern unsigned int spin_lock_bit(spin_lock_t, unsigned int bits);
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extern unsigned int spin_unlock_bit(spin_lock_t, unsigned int bits);
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extern unsigned int spin_lock_try(spin_lock_t);
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extern unsigned int spin_lock_held(spin_lock_t);
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/* Other atomic routines */
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extern unsigned int compare_and_store(unsigned int oval,
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unsigned int nval, unsigned int *area);
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extern unsigned int atomic_add(unsigned int *area, int val);
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extern unsigned int atomic_or(unsigned int *area, unsigned int mask);
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extern unsigned int atomic_sub(unsigned int *area, int val);
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extern void queue_atomic(unsigned int *anchor,
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unsigned int *elem, unsigned int disp);
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extern void queue_atomic_list(unsigned int *anchor,
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unsigned int *first, unsigned int *last,
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unsigned int disp);
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extern unsigned int *dequeue_atomic(unsigned int *anchor, unsigned int disp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ATOMIC_H_ */
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