projects / apple / xnu.git / blame
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|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 8ad349bb | 4 | * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ |
| 1c79356b | 5 | * |
| 8ad349bb A |
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 | |
| 10 | * License may not be used to create, or enable the creation or | |
| 11 | * redistribution of, unlawful or unlicensed copies of an Apple operating | |
| 12 | * system, or to circumvent, violate, or enable the circumvention or | |
| 13 | * violation of, any terms of an Apple operating system software license | |
| 14 | * agreement. | |
| 15 | * | |
| 16 | * Please obtain a copy of the License at | |
| 17 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 18 | * file. | |
| 19 | * | |
| 20 | * The Original Code and all software distributed under the License are | |
| 21 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 22 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 23 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 24 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 25 | * Please see the License for the specific language governing rights and | |
| 26 | * limitations under the License. | |
| 27 | * | |
| 28 | * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ | |
| 1c79356b A |
29 | */ |
| 30 | #ifndef _IOSYNCER_H | |
| 31 | #define _IOSYNCER_H | |
| 32 | ||
| 33 | #include <libkern/c++/OSObject.h> | |
| 34 | #include <IOKit/IOTypes.h> | |
| 35 | #include <IOKit/IOLocks.h> | |
| 36 | ||
| 37 | class IOSyncer : public OSObject | |
| 38 | { | |
| 39 | OSDeclareDefaultStructors(IOSyncer) | |
| 40 | ||
| 41 | private: | |
| 42 | // The spin lock that is used to guard the 'threadMustStop' variable. | |
| 43 | IOSimpleLock *guardLock; | |
| 44 | volatile bool threadMustStop; | |
| 45 | IOReturn fResult; | |
| 46 | virtual void free(); | |
| 47 | virtual void privateSignal(); | |
| 48 | ||
| 49 | public: | |
| 50 | ||
| 51 | static IOSyncer * create(bool twoRetains = true); | |
| 52 | ||
| 53 | virtual bool init(bool twoRetains); | |
| 54 | virtual void reinit(); | |
| 55 | virtual IOReturn wait(bool autoRelease = true); | |
| 56 | virtual void signal(IOReturn res = kIOReturnSuccess, | |
| 57 | bool autoRelease = true); | |
| 58 | }; | |
| 59 | ||
| 60 | #endif /* !_IOSYNCER */ | |
| 61 |