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
OSDefineMetaClassAndStructors(IOPMPowerStateQueue,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 me->release();
41 return NULL;
42 }
43
44 return me;
45 }
46
47 bool
init(OSObject * inOwner,Action inAction)48 IOPMPowerStateQueue::init( OSObject * inOwner, Action inAction )
49 {
50 if (!inAction || !(super::init(inOwner, inAction))) {
51 return false;
52 }
53
54 queue_init( &queueHead );
55
56 queueLock = IOLockAlloc();
57 if (!queueLock) {
58 return false;
59 }
60
61 return true;
62 }
63
64 bool
submitPowerEvent(uint32_t eventType,void * arg0,uint64_t arg1)65 IOPMPowerStateQueue::submitPowerEvent(
66 uint32_t eventType,
67 void * arg0,
68 uint64_t arg1 )
69 {
70 PowerEventEntry * entry;
71
72 entry = IOMallocType(PowerEventEntry);
73
74 entry->eventType = eventType;
75 entry->arg0 = arg0;
76 entry->arg1 = arg1;
77
78 IOLockLock(queueLock);
79 queue_enter(&queueHead, entry, PowerEventEntry *, chain);
80 IOLockUnlock(queueLock);
81 signalWorkAvailable();
82
83 return true;
84 }
85
86 bool
checkForWork(void)87 IOPMPowerStateQueue::checkForWork( void )
88 {
89 IOPMPowerStateQueueAction queueAction = (IOPMPowerStateQueueAction) action;
90 PowerEventEntry * entry;
91
92 IOLockLock(queueLock);
93 while (!queue_empty(&queueHead)) {
94 queue_remove_first(&queueHead, entry, PowerEventEntry *, chain);
95 IOLockUnlock(queueLock);
96
97 (*queueAction)(owner, entry->eventType, entry->arg0, entry->arg1);
98 IOFreeType(entry, PowerEventEntry);
99
100 IOLockLock(queueLock);
101 }
102 IOLockUnlock(queueLock);
103
104 return false;
105 }
106