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 |
32 | OSDefineMetaClassAndStructors( IOPMPowerStateQueue, IOEventSource ) |
33 | |
34 | IOPMPowerStateQueue * 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 | |
48 | bool 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 | |
62 | bool 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 | |
85 | bool 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 | |