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Diffstat (limited to 'libthreads/alpha/cthreads.h')
| -rw-r--r-- | libthreads/alpha/cthreads.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/libthreads/alpha/cthreads.h b/libthreads/alpha/cthreads.h new file mode 100644 index 00000000..f2218f40 --- /dev/null +++ b/libthreads/alpha/cthreads.h @@ -0,0 +1,61 @@ +/* + * 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_ |