1/* 2 * Copyright (c) 1998-2007 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 23#ifndef _IOFWSYNCER_H 24#define _IOFWSYNCER_H 25 26#include <libkern/c++/OSObject.h> 27#include <IOKit/IOTypes.h> 28#include <IOKit/IOLocks.h> 29 30class IOFWSyncer : public OSObject 31{ 32 OSDeclareDefaultStructors(IOFWSyncer) 33 34private: 35 // The spin lock that is used to guard the 'threadMustStop' variable. 36 IOSimpleLock *guardLock; 37 volatile bool threadMustStop; 38 IOReturn fResult; 39 virtual void free(); 40 virtual void privateSignal(); 41 42public: 43 44 static IOFWSyncer * create(bool twoRetains = true); 45 46 virtual bool init(bool twoRetains); 47 virtual void reinit(); 48 virtual IOReturn wait(bool autoRelease = true); 49 virtual void signal(IOReturn res = kIOReturnSuccess, 50 bool autoRelease = true); 51}; 52 53#endif /* !_IOFWSYNCER */ 54 55