1/*
2 * Copyright (c) 2001-2019 Apple 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
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25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef _IOPMPOWERSTATEQUEUE_H_
30#define _IOPMPOWERSTATEQUEUE_H_
31
32#include <IOKit/IOEventSource.h>
33#include <IOKit/IOLocks.h>
34#include <kern/queue.h>
35
36typedef void (*IOPMPowerStateQueueAction)(OSObject *, uint32_t event, void *, uint64_t);
37
38class IOPMPowerStateQueue : public IOEventSource
39{
40 OSDeclareDefaultStructors(IOPMPowerStateQueue);
41
42private:
43 struct PowerEventEntry {
44 queue_chain_t chain;
45 uint32_t eventType;
46 void * arg0;
47 uint64_t arg1;
48 };
49
50 queue_head_t queueHead;
51 IOLock * queueLock;
52
53protected:
54 virtual bool checkForWork( void ) APPLE_KEXT_OVERRIDE;
55 virtual bool init( OSObject * owner, Action action ) APPLE_KEXT_OVERRIDE;
56
57public:
58 static IOPMPowerStateQueue * PMPowerStateQueue( OSObject * owner, Action action );
59
60 bool submitPowerEvent( uint32_t eventType, void * arg0 = NULL, uint64_t arg1 = 0 );
61};
62
63#endif /* _IOPMPOWERSTATEQUEUE_H_ */
64