1*4d495c6eSApple OSS Distributions /* 2*4d495c6eSApple OSS Distributions * Copyright (c) 1998-2019 Apple Inc. All rights reserved. 3*4d495c6eSApple OSS Distributions * 4*4d495c6eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*4d495c6eSApple OSS Distributions * 6*4d495c6eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*4d495c6eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*4d495c6eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*4d495c6eSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*4d495c6eSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*4d495c6eSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*4d495c6eSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*4d495c6eSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*4d495c6eSApple OSS Distributions * 15*4d495c6eSApple OSS Distributions * Please obtain a copy of the License at 16*4d495c6eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*4d495c6eSApple OSS Distributions * 18*4d495c6eSApple OSS Distributions * The Original Code and all software distributed under the License are 19*4d495c6eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*4d495c6eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*4d495c6eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*4d495c6eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*4d495c6eSApple OSS Distributions * Please see the License for the specific language governing rights and 24*4d495c6eSApple OSS Distributions * limitations under the License. 25*4d495c6eSApple OSS Distributions * 26*4d495c6eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*4d495c6eSApple OSS Distributions */ 28*4d495c6eSApple OSS Distributions #ifndef _IOSYNCER_H 29*4d495c6eSApple OSS Distributions #define _IOSYNCER_H 30*4d495c6eSApple OSS Distributions 31*4d495c6eSApple OSS Distributions #include <libkern/c++/OSObject.h> 32*4d495c6eSApple OSS Distributions #include <IOKit/IOTypes.h> 33*4d495c6eSApple OSS Distributions #include <IOKit/IOLocks.h> 34*4d495c6eSApple OSS Distributions 35*4d495c6eSApple OSS Distributions class IOSyncer : public OSObject 36*4d495c6eSApple OSS Distributions { 37*4d495c6eSApple OSS Distributions OSDeclareDefaultStructors(IOSyncer); 38*4d495c6eSApple OSS Distributions 39*4d495c6eSApple OSS Distributions private: 40*4d495c6eSApple OSS Distributions // The spin lock that is used to guard the 'threadMustStop' variable. 41*4d495c6eSApple OSS Distributions IOSimpleLock *guardLock; 42*4d495c6eSApple OSS Distributions volatile bool threadMustStop; 43*4d495c6eSApple OSS Distributions IOReturn fResult; 44*4d495c6eSApple OSS Distributions virtual void free() APPLE_KEXT_OVERRIDE; 45*4d495c6eSApple OSS Distributions virtual void privateSignal(); 46*4d495c6eSApple OSS Distributions 47*4d495c6eSApple OSS Distributions public: 48*4d495c6eSApple OSS Distributions 49*4d495c6eSApple OSS Distributions static IOSyncer * create(bool twoRetains = true) 50*4d495c6eSApple OSS Distributions APPLE_KEXT_DEPRECATED; 51*4d495c6eSApple OSS Distributions 52*4d495c6eSApple OSS Distributions virtual bool init(bool twoRetains) 53*4d495c6eSApple OSS Distributions APPLE_KEXT_DEPRECATED; 54*4d495c6eSApple OSS Distributions virtual void reinit() 55*4d495c6eSApple OSS Distributions APPLE_KEXT_DEPRECATED; 56*4d495c6eSApple OSS Distributions virtual IOReturn wait(bool autoRelease = true) 57*4d495c6eSApple OSS Distributions APPLE_KEXT_DEPRECATED; 58*4d495c6eSApple OSS Distributions virtual void signal(IOReturn res = kIOReturnSuccess, 59*4d495c6eSApple OSS Distributions bool autoRelease = true) 60*4d495c6eSApple OSS Distributions APPLE_KEXT_DEPRECATED; 61*4d495c6eSApple OSS Distributions }; 62*4d495c6eSApple OSS Distributions 63*4d495c6eSApple OSS Distributions #endif /* !_IOSYNCER */ 64