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