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Annotation of driverkit/Examples/IOStub/IOStub.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: /*     IOStub.h        1.0     01/29/91        (c) 1991 NeXT   
        !            25:  *
        !            26:  * IOStub.h - Interface for trivial I/O device subclass.
        !            27:  *
        !            28:  * HISTORY
        !            29:  * 29-Jan-91    Doug Mitchell at NeXT
        !            30:  *      Created. 
        !            31:  */
        !            32:  
        !            33: #import <driverkit/return.h>
        !            34: #import <mach/mach.h>
        !            35: #import <mach/vm_param.h>
        !            36: #import <driverkit/IODisk.h>
        !            37: #import <driverkit/IODiskRwDistributed.h>
        !            38: #import <driverkit/generalFuncs.h>
        !            39: #import <kernserv/queue.h>
        !            40: 
        !            41: #define        SUPPORT_ASYNC   0
        !            42: 
        !            43: @interface IOStub: IODisk<IODiskReadingAndWriting, DiskRwDistributed>
        !            44: {
        !            45:        char            *stub_data;     // read/write data
        !            46:        id              ioQLock;        // NXConditionLock. Protects ioQueue;
        !            47:                                        //    I/O thread sleeps on this.
        !            48:        queue_head_t    ioQueue;        // queue of IOBuf's
        !            49: }
        !            50: 
        !            51: /* 
        !            52:  * Condition variable states for  ioQLock.
        !            53:  */
        !            54: #define NO_WORK_AVAILABLE      0
        !            55: #define WORK_AVAILABLE         1
        !            56: 
        !            57: /*
        !            58:  * Init and free instances.
        !            59:  */
        !            60: - initStub : (int)unitNum;
        !            61: - free;
        !            62: 
        !            63: @end

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