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Annotation of kernel/kernserv/lock.h, revision 1.1.1.1

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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