1/*
2 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
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 License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28#ifndef _IOSYNCER_H
29#define _IOSYNCER_H
30
31#include <libkern/c++/OSObject.h>
32#include <IOKit/IOTypes.h>
33#include <IOKit/IOLocks.h>
34
35class IOSyncer : public OSObject
36{
37 OSDeclareDefaultStructors(IOSyncer)
38
39private:
40 // The spin lock that is used to guard the 'threadMustStop' variable.
41 IOSimpleLock *guardLock;
42 volatile bool threadMustStop;
43 IOReturn fResult;
44 virtual void free() APPLE_KEXT_OVERRIDE;
45 virtual void privateSignal();
46
47public:
48
49 static IOSyncer * create(bool twoRetains = true)
50 APPLE_KEXT_DEPRECATED;
51
52 virtual bool init(bool twoRetains)
53 APPLE_KEXT_DEPRECATED;
54 virtual void reinit()
55 APPLE_KEXT_DEPRECATED;
56 virtual IOReturn wait(bool autoRelease = true)
57 APPLE_KEXT_DEPRECATED;
58 virtual void signal(IOReturn res = kIOReturnSuccess,
59 bool autoRelease = true)
60 APPLE_KEXT_DEPRECATED;
61};
62
63#endif /* !_IOSYNCER */
64
65