1 /* 2 * Copyright (c) 2001-2019 Apple 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/IOEventSource.h> 33 #include <IOKit/IOLocks.h> 34 #include <kern/queue.h> 35 36 typedef void (*IOPMPowerStateQueueAction)(OSObject *, uint32_t event, void *, uint64_t); 37 38 class IOPMPowerStateQueue : public IOEventSource 39 { 40 OSDeclareDefaultStructors(IOPMPowerStateQueue); 41 42 private: 43 struct PowerEventEntry { 44 queue_chain_t chain; 45 uint32_t eventType; 46 void * arg0; 47 uint64_t arg1; 48 }; 49 50 queue_head_t queueHead; 51 IOLock * queueLock; 52 53 protected: 54 virtual bool checkForWork( void ) APPLE_KEXT_OVERRIDE; 55 virtual bool init( OSObject * owner, Action action ) APPLE_KEXT_OVERRIDE; 56 57 public: 58 static IOPMPowerStateQueue * PMPowerStateQueue( OSObject * owner, Action action ); 59 60 bool submitPowerEvent( uint32_t eventType, void * arg0 = NULL, uint64_t arg1 = 0 ); 61 }; 62 63 #endif /* _IOPMPOWERSTATEQUEUE_H_ */ 64