/* * 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 1.1 2002/05/27 02:13:47 roland * 2002-05-26 Roland McGrath * * * alpha/cthreads.h, alpha/thread.c, alpha/csw.S, alpha/lock.S: * New files, verbatim from CMU release MK83a user/threads/alpha. * * 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_