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Annotation of kernel/kern/msg_queue.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: #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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