diff options
Diffstat (limited to 'libthreads/sync.c')
| -rw-r--r-- | libthreads/sync.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/libthreads/sync.c b/libthreads/sync.c deleted file mode 100644 index d65eb654..00000000 --- a/libthreads/sync.c +++ /dev/null @@ -1,86 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1992,1991,1990,1989 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: sync.c,v $ - * Revision 2.8 93/01/14 18:06:23 danner - * Converted file to ANSI C. - * [92/12/18 pds] - * - * Revision 2.7 92/03/06 14:09:59 rpd - * Replaced swtch_pri with yield. - * [92/03/06 rpd] - * - * Revision 2.6 91/05/14 17:59:54 mrt - * Correcting copyright - * - * Revision 2.5 91/02/14 14:21:38 mrt - * Added new Mach copyright - * [91/02/13 12:41:42 mrt] - * - * Revision 2.4 90/11/05 14:38:08 rpd - * Fix casting. Use new macros. - * [90/10/31 rwd] - * - * Revision 2.3 90/08/07 14:31:50 rpd - * Removed RCS keyword nonsense. - * - * Revision 2.2 89/12/08 19:55:01 rwd - * Changed spin_lock to spin_lock_solid to optimize. - * [89/11/13 rwd] - * Added copyright. Move mutexes to cproc.c. Spin locks are now - * old mutexes. - * [89/10/23 rwd] - * - */ -/* - * sync.c - * - * Spin locks - */ - -#include <cthreads.h> -#include "cthread_internals.h" - -/* - * Spin locks. - * Use test and test-and-set logic on all architectures. - */ - -int cthread_spin_count=0; - -void -spin_lock_solid(register spin_lock_t *p) -{ - while (spin_lock_locked(p) || !spin_try_lock(p)) { -#ifdef STATISTICS - cthread_spin_count++; -#endif -#ifdef SPIN_RESCHED - yield(); -#endif - } -} |