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1/*
2 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
3 *
6601e61a 4 * @APPLE_LICENSE_HEADER_START@
1c79356b 5 *
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6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
8f6c56a5 11 *
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12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
8f6c56a5 19 *
6601e61a 20 * @APPLE_LICENSE_HEADER_END@
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21 */
22#include <libkern/c++/OSObject.h>
0c530ab8 23#include <IOKit/IOLocks.h>
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24#include <IOKit/IOReturn.h>
25
26class IOPMinformee;
27class IOService;
28
29class IOPMinformeeList : public OSObject
30{
31OSDeclareDefaultStructors(IOPMinformeeList)
32
33private:
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34 IOPMinformee *firstItem; // pointer to first informee in the list
35 unsigned long length; // how many informees are in the list
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36
37public:
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38 void initialize ( void );
39 void free ( void );
1c79356b 40
0c530ab8 41 unsigned long numberOfItems ( void );
1c79356b 42
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43 IOReturn addToList ( IOPMinformee * newInformee );
44 IOReturn removeFromList ( IOService * theItem );
45
46 IOPMinformee * firstInList ( void );
47 IOPMinformee * nextInList ( IOPMinformee * currentItem );
48
49 IOPMinformee * findItem ( IOService * driverOrChild );
1c79356b 50
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51 // This lock must be held while modifying list or length
52 static IORecursiveLock * getSharedRecursiveLock( void );
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53};
54