/* * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #include "IOPMPowerStateQueue.h" #undef super #define super IOEventSource OSDefineMetaClassAndStructors(IOPMPowerStateQueue, IOEventSource); IOPMPowerStateQueue *IOPMPowerStateQueue::PMPowerStateQueue(OSObject *inOwner) { IOPMPowerStateQueue *me = new IOPMPowerStateQueue; if(me && !me->init(inOwner, 0) ) { me->release(); return NULL; } return me; } bool IOPMPowerStateQueue::init(OSObject *owner, Action action) { if(!(super::init(owner, (IOEventSource::Action) action))) return false; // Queue of powerstate changes changes = NULL; return true; } bool IOPMPowerStateQueue::unIdleOccurred(IOService *inTarget, unsigned long inState) { PowerChangeEntry *new_one = NULL; new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry)); if(!new_one) return false; new_one->actionType = IOPMPowerStateQueue::kUnIdle; new_one->state = inState; new_one->target = inTarget; // Change to queue OSEnqueueAtomic((void **)&changes, (void *)new_one, 0); signalWorkAvailable(); return true; } // checkForWork() is called in a gated context bool IOPMPowerStateQueue::checkForWork() { PowerChangeEntry *theNode; int theState; IOService *theTarget; UInt16 theAction; // Dequeue and process the state change request if((theNode = (PowerChangeEntry *)OSDequeueAtomic((void **)&changes, 0))) { theState = theNode->state; theTarget = theNode->target; theAction = theNode->actionType; IOFree((void *)theNode, sizeof(PowerChangeEntry)); switch (theAction) { case kUnIdle: theTarget->command_received(theState, 0, 0, 0); break; } } // Return true if there's more work to be done if(changes) return true; else return false; }