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Annotation of kernel/kernserv/lock.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1989 Carnegie-Mellon University
        !            28:  * Copyright (c) 1988 Carnegie-Mellon University
        !            29:  * Copyright (c) 1987 Carnegie-Mellon University
        !            30:  * All rights reserved.  The CMU software License Agreement specifies
        !            31:  * the terms and conditions for use and redistribution.
        !            32:  */
        !            33: /*
        !            34:  * HISTORY
        !            35:  * 11-Jul-91  Gregg Kellogg (gk) at NeXT
        !            36:  *     Initial version.
        !            37:  */
        !            38: /*
        !            39:  *     File:   kernserv/lock.h
        !            40:  *     Author: Avadis Tevanian, Jr., Michael Wayne Young
        !            41:  *     Copyright (C) 1985, Avadis Tevanian, Jr., Michael Wayne Young
        !            42:  *
        !            43:  *     Exported locking primitives definitions
        !            44:  *
        !            45:  */
        !            46: 
        !            47: #ifdef KERNEL_PRIVATE
        !            48: #warning Obsolete header file: <kernserv/lock.h>. use <kern/lock.h> \
        !            49:        instead; or better yet, just say no!!
        !            50: #import <kern/lock.h>
        !            51: 
        !            52: #else  /* KERNEL_PRIVATE */
        !            53: 
        !            54: #ifndef        _KERN_LOCK_H_
        !            55: #define _KERN_LOCK_H_
        !            56: 
        !            57: #import <mach/boolean.h>
        !            58: 
        !            59: /*
        !            60:  *     A simple spin lock.
        !            61:  */
        !            62: 
        !            63: #import        <mach/machine/simple_lock.h>
        !            64: 
        !            65: typedef void   *lock_t;
        !            66: 
        !            67: /* Sleep locks must work even if no multiprocessing */
        !            68: 
        !            69: extern lock_t          lock_alloc();
        !            70: extern void            lock_free();
        !            71: extern void            lock_init();
        !            72: extern void            lock_sleepable();
        !            73: extern void            lock_write();
        !            74: extern void            lock_read();
        !            75: extern void            lock_done();
        !            76: extern boolean_t       lock_read_to_write();
        !            77: extern void            lock_write_to_read();
        !            78: extern boolean_t       lock_try_write();
        !            79: extern boolean_t       lock_try_read();
        !            80: extern boolean_t       lock_try_read_to_write();
        !            81: 
        !            82: #define lock_read_done(l)      lock_done(l)
        !            83: #define lock_write_done(l)     lock_done(l)
        !            84: 
        !            85: extern void            lock_set_recursive();
        !            86: extern void            lock_clear_recursive();
        !            87: 
        !            88: #endif /* _KERN_LOCK_H_ */
        !            89: 
        !            90: #endif /* KERNEL_PRIVATE */

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