1/*
2 * Copyright (c) 2001 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 * Copyright (c) 2001 Apple Computer, Inc.  All rights reserved.
24 *
25 * HISTORY
26 *
27 */
28
29
30#ifndef _IOKIT_IOFWWORKLOOP_H
31#define _IOKIT_IOFWWORKLOOP_H
32
33#include <IOKit/IOWorkLoop.h>
34#include <libkern/c++/OSSet.h>
35
36class IOFWWorkLoop : public IOWorkLoop
37{
38    OSDeclareDefaultStructors(IOFWWorkLoop)
39
40protected:
41    void *				fSleepToken;
42	static SInt32		sLockGroupCount;
43	lck_grp_t *			fLockGroup;
44
45	IOThread			fRemoveSourceThread;
46	OSSet *				fRemoveSourceDeferredSet;
47
48	bool init( void );
49	void free( void );
50
51    // Overrides to check for sleeping
52    virtual void closeGate();
53    virtual bool tryCloseGate();
54
55public:
56    // Create a workloop
57    static IOFWWorkLoop * workLoop();
58
59    // Put workloop to sleep (Must have gate closed, opens gate if successful)
60    virtual IOReturn sleep( void *token );
61
62    // Wake workloop up (closes gate if successful)
63    virtual IOReturn wake( void *token );
64
65	virtual IOReturn removeEventSource(IOEventSource *toRemove);
66
67};
68
69#endif /* ! _IOKIT_IOFWWORKLOOP_H */
70
71