| | 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 | } |
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