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#ifndef _IOPMPOWERSTATEQUEUE_H_ 30#define _IOPMPOWERSTATEQUEUE_H_ 31 32#include <IOKit/IOWorkLoop.h> 33#include <IOKit/IOEventSource.h> 34#include <IOKit/IOService.h> 35extern "C" { 36 #include <kern/queue.h> 37} 38 39class IOPMPowerStateQueue : public IOEventSource 40 { 41 OSDeclareDefaultStructors(IOPMPowerStateQueue); 42 43private: 44 enum { 45 kUnIdle = 0, 46 kPMFeatureChange = 1 47 }; 48 49 // Queue of requested states 50 struct PowerChangeEntry 51 { 52 void *next; 53 uint16_t actionType; 54 uint32_t state; 55 IOService *target; 56 }; 57 58 void *changes; 59#ifndef __ppc__ 60 IOLock *tmpLock; 61#endif 62 63protected: 64 virtual bool checkForWork(void); 65 66public: 67 //typedef void (*Action)(IOService *target, unsigned long state); 68 69 virtual bool init(OSObject *owner, Action action = 0); 70 71 // static initialiser 72 static IOPMPowerStateQueue *PMPowerStateQueue(OSObject *owner); 73 74 // Enqueues an activityTickle request to be executed on the workloop 75 virtual bool unIdleOccurred(IOService *, unsigned long); 76 77 // Enqueues a feature changed notify request to be executed on the workloop 78 virtual bool featureChangeOccurred(uint32_t, IOService *); 79 }; 80 81 #endif /* _IOPMPOWERSTATEQUEUE_H_ */ 82 83