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#include "IOPMPowerStateQueue.h"
30
31#define super IOEventSource
32OSDefineMetaClassAndStructors( IOPMPowerStateQueue, IOEventSource )
33
34IOPMPowerStateQueue * IOPMPowerStateQueue::PMPowerStateQueue(
35 OSObject * inOwner, Action inAction )
36{
37 IOPMPowerStateQueue * me = new IOPMPowerStateQueue;
38
39 if (me && !me->init(inOwner, inAction))
40 {
41 me->release();
42 return NULL;
43 }
44
45 return me;
46}
47
48bool IOPMPowerStateQueue::init( OSObject * inOwner, Action inAction )
49{
50 if (!inAction || !(super::init(inOwner, inAction)))
51 return false;
52
53 queue_init( &queueHead );
54
55 queueLock = IOLockAlloc();
56 if (!queueLock)
57 return false;
58
59 return true;
60}
61
62bool IOPMPowerStateQueue::submitPowerEvent(
63 uint32_t eventType,
64 void * arg0,
65 uint64_t arg1 )
66{
67 PowerEventEntry * entry;
68
69 entry = IONew(PowerEventEntry, 1);
70 if (!entry)
71 return false;
72
73 entry->eventType = eventType;
74 entry->arg0 = arg0;
75 entry->arg1 = arg1;
76
77 IOLockLock(queueLock);
78 queue_enter(&queueHead, entry, PowerEventEntry *, chain);
79 IOLockUnlock(queueLock);
80 signalWorkAvailable();
81
82 return true;
83}
84
85bool IOPMPowerStateQueue::checkForWork( void )
86{
87 IOPMPowerStateQueueAction queueAction = (IOPMPowerStateQueueAction) action;
88 PowerEventEntry * entry;
89
90 IOLockLock(queueLock);
91 while (!queue_empty(&queueHead))
92 {
93 queue_remove_first(&queueHead, entry, PowerEventEntry *, chain);
94 IOLockUnlock(queueLock);
95
96 (*queueAction)(owner, entry->eventType, entry->arg0, entry->arg1);
97 IODelete(entry, PowerEventEntry, 1);
98
99 IOLockLock(queueLock);
100 }
101 IOLockUnlock(queueLock);
102
103 return false;
104}
105