| | 1 | /* |
| | 2 | * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | |
| | 23 | #include "IOPMPowerStateQueue.h" |
| | 24 | #undef super |
| | 25 | #define super IOEventSource |
| | 26 | OSDefineMetaClassAndStructors(IOPMPowerStateQueue, IOEventSource); |
| | 27 | |
| | 28 | IOPMPowerStateQueue *IOPMPowerStateQueue::PMPowerStateQueue(OSObject *inOwner) |
| | 29 | { |
| | 30 | IOPMPowerStateQueue *me = new IOPMPowerStateQueue; |
| | 31 | |
| | 32 | if(me && !me->init(inOwner, 0) ) |
| | 33 | { |
| | 34 | me->release(); |
| | 35 | return NULL; |
| | 36 | } |
| | 37 | |
| | 38 | return me; |
| | 39 | } |
| | 40 | |
| | 41 | bool IOPMPowerStateQueue::init(OSObject *owner, Action action) |
| | 42 | { |
| | 43 | if(!(super::init(owner, (IOEventSource::Action) action))) return false; |
| | 44 | |
| | 45 | // Queue of powerstate changes |
| | 46 | changes = NULL; |
| | 47 | |
| | 48 | return true; |
| | 49 | } |
| | 50 | |
| | 51 | |
| | 52 | bool IOPMPowerStateQueue::unIdleOccurred(IOService *inTarget, unsigned long inState) |
| | 53 | { |
| | 54 | PowerChangeEntry *new_one = NULL; |
| | 55 | |
| | 56 | new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry)); |
| | 57 | if(!new_one) return false; |
| | 58 | |
| | 59 | new_one->actionType = IOPMPowerStateQueue::kUnIdle; |
| | 60 | new_one->state = inState; |
| | 61 | new_one->target = inTarget; |
| | 62 | |
| | 63 | // Change to queue |
| | 64 | OSEnqueueAtomic((void **)&changes, (void *)new_one, 0); |
| | 65 | |
| | 66 | signalWorkAvailable(); |
| | 67 | |
| | 68 | return true; |
| | 69 | } |
| | 70 | |
| | 71 | // checkForWork() is called in a gated context |
| | 72 | bool IOPMPowerStateQueue::checkForWork() |
| | 73 | { |
| | 74 | PowerChangeEntry *theNode; |
| | 75 | int theState; |
| | 76 | IOService *theTarget; |
| | 77 | UInt16 theAction; |
| | 78 | |
| | 79 | // Dequeue and process the state change request |
| | 80 | if((theNode = (PowerChangeEntry *)OSDequeueAtomic((void **)&changes, 0))) |
| | 81 | { |
| | 82 | theState = theNode->state; |
| | 83 | theTarget = theNode->target; |
| | 84 | theAction = theNode->actionType; |
| | 85 | IOFree((void *)theNode, sizeof(PowerChangeEntry)); |
| | 86 | |
| | 87 | switch (theAction) |
| | 88 | { |
| | 89 | case kUnIdle: |
| | 90 | theTarget->command_received(theState, 0, 0, 0); |
| | 91 | break; |
| | 92 | } |
| | 93 | } |
| | 94 | |
| | 95 | // Return true if there's more work to be done |
| | 96 | if(changes) return true; |
| | 97 | else return false; |
| | 98 | } |
projects / apple / xnu.git / blame_incremental