1*8d741a5dSApple OSS Distributions /* 2*8d741a5dSApple OSS Distributions * Copyright (c) 1998-2019 Apple Inc. All rights reserved. 3*8d741a5dSApple OSS Distributions * 4*8d741a5dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*8d741a5dSApple OSS Distributions * 6*8d741a5dSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*8d741a5dSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*8d741a5dSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*8d741a5dSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*8d741a5dSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*8d741a5dSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*8d741a5dSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*8d741a5dSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*8d741a5dSApple OSS Distributions * 15*8d741a5dSApple OSS Distributions * Please obtain a copy of the License at 16*8d741a5dSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*8d741a5dSApple OSS Distributions * 18*8d741a5dSApple OSS Distributions * The Original Code and all software distributed under the License are 19*8d741a5dSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*8d741a5dSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*8d741a5dSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*8d741a5dSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*8d741a5dSApple OSS Distributions * Please see the License for the specific language governing rights and 24*8d741a5dSApple OSS Distributions * limitations under the License. 25*8d741a5dSApple OSS Distributions * 26*8d741a5dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*8d741a5dSApple OSS Distributions */ 28*8d741a5dSApple OSS Distributions #ifndef _IOSYNCER_H 29*8d741a5dSApple OSS Distributions #define _IOSYNCER_H 30*8d741a5dSApple OSS Distributions 31*8d741a5dSApple OSS Distributions #include <libkern/c++/OSObject.h> 32*8d741a5dSApple OSS Distributions #include <IOKit/IOTypes.h> 33*8d741a5dSApple OSS Distributions #include <IOKit/IOLocks.h> 34*8d741a5dSApple OSS Distributions 35*8d741a5dSApple OSS Distributions class IOSyncer : public OSObject 36*8d741a5dSApple OSS Distributions { 37*8d741a5dSApple OSS Distributions OSDeclareDefaultStructors(IOSyncer); 38*8d741a5dSApple OSS Distributions 39*8d741a5dSApple OSS Distributions private: 40*8d741a5dSApple OSS Distributions // The spin lock that is used to guard the 'threadMustStop' variable. 41*8d741a5dSApple OSS Distributions IOSimpleLock *guardLock; 42*8d741a5dSApple OSS Distributions volatile bool threadMustStop; 43*8d741a5dSApple OSS Distributions IOReturn fResult; 44*8d741a5dSApple OSS Distributions virtual void free() APPLE_KEXT_OVERRIDE; 45*8d741a5dSApple OSS Distributions virtual void privateSignal(); 46*8d741a5dSApple OSS Distributions 47*8d741a5dSApple OSS Distributions public: 48*8d741a5dSApple OSS Distributions 49*8d741a5dSApple OSS Distributions static IOSyncer * create(bool twoRetains = true) 50*8d741a5dSApple OSS Distributions APPLE_KEXT_DEPRECATED; 51*8d741a5dSApple OSS Distributions 52*8d741a5dSApple OSS Distributions virtual bool init(bool twoRetains) 53*8d741a5dSApple OSS Distributions APPLE_KEXT_DEPRECATED; 54*8d741a5dSApple OSS Distributions virtual void reinit() 55*8d741a5dSApple OSS Distributions APPLE_KEXT_DEPRECATED; 56*8d741a5dSApple OSS Distributions virtual IOReturn wait(bool autoRelease = true) 57*8d741a5dSApple OSS Distributions APPLE_KEXT_DEPRECATED; 58*8d741a5dSApple OSS Distributions virtual void signal(IOReturn res = kIOReturnSuccess, 59*8d741a5dSApple OSS Distributions bool autoRelease = true) 60*8d741a5dSApple OSS Distributions APPLE_KEXT_DEPRECATED; 61*8d741a5dSApple OSS Distributions }; 62*8d741a5dSApple OSS Distributions 63*8d741a5dSApple OSS Distributions #endif /* !_IOSYNCER */ 64