1/*
2 * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef _IOPMPOWERSTATEQUEUE_H_
30#define _IOPMPOWERSTATEQUEUE_H_
31
32#include <IOKit/IOWorkLoop.h>
33#include <IOKit/IOEventSource.h>
34#include <IOKit/IOService.h>
35extern "C" {
36    #include <kern/queue.h>
37}
38
39class IOPMPowerStateQueue : public IOEventSource
40 {
41    OSDeclareDefaultStructors(IOPMPowerStateQueue);
42
43private:
44    enum {
45        kUnIdle = 0,
46        kPMFeatureChange = 1
47    };
48
49    // Queue of requested states
50    struct PowerChangeEntry
51    {
52        void                    *next;
53        uint16_t                actionType;
54        uint32_t                state;
55        IOService               *target;
56    };
57
58    void                        *changes;
59#ifndef __ppc__
60    IOLock                      *tmpLock;
61#endif
62
63protected:
64    virtual bool checkForWork(void);
65
66public:
67    //typedef void (*Action)(IOService *target, unsigned long state);
68
69    virtual bool init(OSObject *owner, Action action = 0);
70
71    // static initialiser
72    static IOPMPowerStateQueue *PMPowerStateQueue(OSObject *owner);
73
74    // Enqueues an activityTickle request to be executed on the workloop
75    virtual bool unIdleOccurred(IOService *, unsigned long);
76
77    // Enqueues a feature changed notify request to be executed on the workloop
78    virtual bool featureChangeOccurred(uint32_t, IOService *);
79 };
80
81 #endif /* _IOPMPOWERSTATEQUEUE_H_ */
82
83