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Annotation of XNU/osfmk/ppc/lock.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /*
                     23:  * Copyright (C) 1998 Apple Computer
                     24:  * All Rights Reserved
                     25:  */
                     26: /*
                     27:  * @OSF_COPYRIGHT@
                     28:  */
                     29: 
                     30: /* 
                     31:  * Mach Operating System
                     32:  * Copyright (c) 1991,1990 Carnegie Mellon University
                     33:  * All Rights Reserved.
                     34:  * 
                     35:  * Permission to use, copy, modify and distribute this software and its
                     36:  * documentation is hereby granted, provided that both the copyright
                     37:  * notice and this permission notice appear in all copies of the
                     38:  * software, derivative works or modified versions, and any portions
                     39:  * thereof, and that both notices appear in supporting documentation.
                     40:  * 
                     41:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     42:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     43:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     44:  * 
                     45:  * Carnegie Mellon requests users of this software to return to
                     46:  * 
                     47:  *  Software Distribution Coordinator  or  [email protected]
                     48:  *  School of Computer Science
                     49:  *  Carnegie Mellon University
                     50:  *  Pittsburgh PA 15213-3890
                     51:  * 
                     52:  * any improvements or extensions that they make and grant Carnegie Mellon
                     53:  * the rights to redistribute these changes.
                     54:  */
                     55: 
                     56: #ifndef        _PPC_HW_LOCK_H_
                     57: #define        _PPC_HW_LOCK_H_
                     58: 
                     59: #include <kern/macro_help.h>
                     60: #include <kern/assert.h>
                     61: 
                     62: #define        NEED_ATOMIC 1
                     63: 
                     64: #define mutex_try      _mutex_try
                     65: #define mutex_lock(m)                          \
                     66: MACRO_BEGIN                                    \
                     67:        assert(assert_wait_possible());         \
                     68:        _mutex_lock((m));                       \
                     69: MACRO_END
                     70: 
                     71: extern unsigned int LockTimeOut;                       /* Number of hardware ticks of a lock timeout */
                     72: 
                     73: #endif /* _PPC_HW_LOCK_H_ */

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