1*5c2921b0SApple OSS Distributions /* 2*5c2921b0SApple OSS Distributions * Copyright (c) 1998-2019 Apple Inc. All rights reserved. 3*5c2921b0SApple OSS Distributions * 4*5c2921b0SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*5c2921b0SApple OSS Distributions * 6*5c2921b0SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*5c2921b0SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*5c2921b0SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*5c2921b0SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*5c2921b0SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*5c2921b0SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*5c2921b0SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*5c2921b0SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*5c2921b0SApple OSS Distributions * 15*5c2921b0SApple OSS Distributions * Please obtain a copy of the License at 16*5c2921b0SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*5c2921b0SApple OSS Distributions * 18*5c2921b0SApple OSS Distributions * The Original Code and all software distributed under the License are 19*5c2921b0SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*5c2921b0SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*5c2921b0SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*5c2921b0SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*5c2921b0SApple OSS Distributions * Please see the License for the specific language governing rights and 24*5c2921b0SApple OSS Distributions * limitations under the License. 25*5c2921b0SApple OSS Distributions * 26*5c2921b0SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*5c2921b0SApple OSS Distributions */ 28*5c2921b0SApple OSS Distributions #ifndef _IOSYNCER_H 29*5c2921b0SApple OSS Distributions #define _IOSYNCER_H 30*5c2921b0SApple OSS Distributions 31*5c2921b0SApple OSS Distributions #include <libkern/c++/OSObject.h> 32*5c2921b0SApple OSS Distributions #include <IOKit/IOTypes.h> 33*5c2921b0SApple OSS Distributions #include <IOKit/IOLocks.h> 34*5c2921b0SApple OSS Distributions 35*5c2921b0SApple OSS Distributions class IOSyncer : public OSObject 36*5c2921b0SApple OSS Distributions { 37*5c2921b0SApple OSS Distributions OSDeclareDefaultStructors(IOSyncer); 38*5c2921b0SApple OSS Distributions 39*5c2921b0SApple OSS Distributions private: 40*5c2921b0SApple OSS Distributions // The spin lock that is used to guard the 'threadMustStop' variable. 41*5c2921b0SApple OSS Distributions IOSimpleLock *guardLock; 42*5c2921b0SApple OSS Distributions volatile bool threadMustStop; 43*5c2921b0SApple OSS Distributions IOReturn fResult; 44*5c2921b0SApple OSS Distributions virtual void free() APPLE_KEXT_OVERRIDE; 45*5c2921b0SApple OSS Distributions virtual void privateSignal(); 46*5c2921b0SApple OSS Distributions 47*5c2921b0SApple OSS Distributions public: 48*5c2921b0SApple OSS Distributions 49*5c2921b0SApple OSS Distributions static IOSyncer * create(bool twoRetains = true) 50*5c2921b0SApple OSS Distributions APPLE_KEXT_DEPRECATED; 51*5c2921b0SApple OSS Distributions 52*5c2921b0SApple OSS Distributions virtual bool init(bool twoRetains) 53*5c2921b0SApple OSS Distributions APPLE_KEXT_DEPRECATED; 54*5c2921b0SApple OSS Distributions virtual void reinit() 55*5c2921b0SApple OSS Distributions APPLE_KEXT_DEPRECATED; 56*5c2921b0SApple OSS Distributions virtual IOReturn wait(bool autoRelease = true) 57*5c2921b0SApple OSS Distributions APPLE_KEXT_DEPRECATED; 58*5c2921b0SApple OSS Distributions virtual void signal(IOReturn res = kIOReturnSuccess, 59*5c2921b0SApple OSS Distributions bool autoRelease = true) 60*5c2921b0SApple OSS Distributions APPLE_KEXT_DEPRECATED; 61*5c2921b0SApple OSS Distributions }; 62*5c2921b0SApple OSS Distributions 63*5c2921b0SApple OSS Distributions #endif /* !_IOSYNCER */ 64