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Annotation of kernel/kern/msg_queue.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: #ifndef        _KERN_MSG_QUEUE_H_
                     35: #define _KERN_MSG_QUEUE_H_
                     36: 
                     37: #import <kern/queue.h>
                     38: #import <kern/lock.h>
                     39: #import <kernserv/macro_help.h>
                     40: 
                     41: typedef struct {
                     42:        queue_head_t messages;
                     43:        decl_simple_lock_data(,lock)
                     44:        queue_head_t blocked_threads;
                     45: } msg_queue_t;
                     46: 
                     47: #define msg_queue_lock(mq)     simple_lock(&(mq)->lock)
                     48: #define msg_queue_unlock(mq)   simple_unlock(&(mq)->lock)
                     49: 
                     50: #define msg_queue_init(mq)                     \
                     51: MACRO_BEGIN                                    \
                     52:        simple_lock_init(&(mq)->lock);          \
                     53:        queue_init(&(mq)->messages);            \
                     54:        queue_init(&(mq)->blocked_threads);     \
                     55: MACRO_END
                     56: 
                     57: #endif /* _KERN_MSG_QUEUE_H_ */

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