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