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/*
* Mach Operating System
* Copyright (c) 1993,1992 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.
*/
/*
* HISTORY
* $Log: cthreads.h,v $
* Revision 2.4 93/11/17 19:00:42 dbg
* When compiling with GCC, inline cthread_sp().
* [93/09/21 af]
*
* Revision 2.3 93/01/19 08:56:02 danner
* Locks are now 64bits.
* [92/12/30 af]
*
* Revision 2.2 93/01/14 18:04:28 danner
* Created.
* [92/05/31 af]
*
*/
#ifndef _MACHINE_CTHREADS_H_
#define _MACHINE_CTHREADS_H_
typedef long spin_lock_t;
#define SPIN_LOCK_INITIALIZER 0
#define spin_lock_init(s) *(s)=0
#define spin_lock_locked(s) (*(s) != 0)
#if defined(__GNUC__)
#define cthread_sp() \
({ register vm_offset_t _sp__; \
__asm__("or $31,$30,%0" \
: "=r" (_sp__) ); \
_sp__; })
#endif /* __GNUC__ */
#endif _MACHINE_CTHREADS_H_
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