projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 55e303ae A |
1 | /* |
| 2 | * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. | |
| 7 | * | |
| 8 | * This file contains Original Code and/or Modifications of Original Code | |
| 9 | * as defined in and that are subject to the Apple Public Source License | |
| 10 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 11 | * compliance with the License. Please obtain a copy of the License at | |
| 12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 13 | * file. | |
| 14 | * | |
| 15 | * The Original Code and all software distributed under the License are | |
| 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 20 | * Please see the License for the specific language governing rights and | |
| 21 | * limitations under the License. | |
| 22 | * | |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | ||
| 26 | #include "IOPMPowerStateQueue.h" | |
| 27 | #undef super | |
| 28 | #define super IOEventSource | |
| 29 | OSDefineMetaClassAndStructors(IOPMPowerStateQueue, IOEventSource); | |
| 30 | ||
| 31 | IOPMPowerStateQueue *IOPMPowerStateQueue::PMPowerStateQueue(OSObject *inOwner) | |
| 32 | { | |
| 33 | IOPMPowerStateQueue *me = new IOPMPowerStateQueue; | |
| 34 | ||
| 35 | if(me && !me->init(inOwner, 0) ) | |
| 36 | { | |
| 37 | me->release(); | |
| 38 | return NULL; | |
| 39 | } | |
| 40 | ||
| 41 | return me; | |
| 42 | } | |
| 43 | ||
| 44 | bool IOPMPowerStateQueue::init(OSObject *owner, Action action) | |
| 45 | { | |
| 46 | if(!(super::init(owner, (IOEventSource::Action) action))) return false; | |
| 47 | ||
| 48 | // Queue of powerstate changes | |
| 49 | changes = NULL; | |
| 50 | ||
| 51 | return true; | |
| 52 | } | |
| 53 | ||
| 54 | ||
| 55 | bool IOPMPowerStateQueue::unIdleOccurred(IOService *inTarget, unsigned long inState) | |
| 56 | { | |
| 57 | PowerChangeEntry *new_one = NULL; | |
| 58 | ||
| 59 | new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry)); | |
| 60 | if(!new_one) return false; | |
| 61 | ||
| 62 | new_one->actionType = IOPMPowerStateQueue::kUnIdle; | |
| 63 | new_one->state = inState; | |
| 64 | new_one->target = inTarget; | |
| 65 | ||
| 66 | // Change to queue | |
| 67 | OSEnqueueAtomic((void **)&changes, (void *)new_one, 0); | |
| 68 | ||
| 69 | signalWorkAvailable(); | |
| 70 | ||
| 71 | return true; | |
| 72 | } | |
| 73 | ||
| 74 | // checkForWork() is called in a gated context | |
| 75 | bool IOPMPowerStateQueue::checkForWork() | |
| 76 | { | |
| 77 | PowerChangeEntry *theNode; | |
| 78 | int theState; | |
| 79 | IOService *theTarget; | |
| 80 | UInt16 theAction; | |
| 81 | ||
| 82 | // Dequeue and process the state change request | |
| 83 | if((theNode = (PowerChangeEntry *)OSDequeueAtomic((void **)&changes, 0))) | |
| 84 | { | |
| 85 | theState = theNode->state; | |
| 86 | theTarget = theNode->target; | |
| 87 | theAction = theNode->actionType; | |
| 88 | IOFree((void *)theNode, sizeof(PowerChangeEntry)); | |
| 89 | ||
| 90 | switch (theAction) | |
| 91 | { | |
| 92 | case kUnIdle: | |
| 93 | theTarget->command_received(theState, 0, 0, 0); | |
| 94 | break; | |
| 95 | } | |
| 96 | } | |
| 97 | ||
| 98 | // Return true if there's more work to be done | |
| 99 | if(changes) return true; | |
| 100 | else return false; | |
| 101 | } |