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Root/tags/2.3/i386/include/IOKit/usb/IOUSBWorkLoop.h

Source at commit 2862 created 3 years 3 months ago.
By ifabio, Tag 2.3 release, bump svn to 2.4
1/*
2 * Copyright (c) 2001-2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_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. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#ifndef _IOKIT_IOUSBWORKLOOP_H
25#define _IOKIT_IOUSBWORKLOOP_H
26
27#include <IOKit/IOWorkLoop.h>
28
29/*!
30 @class IOUSBWorkLoop
31 @abstract Subclass of IOWorkloop that allows the USB stack to more finely control sleep and wake.
32 */
33class IOUSBWorkLoop : public IOWorkLoop
34{
35 OSDeclareDefaultStructors(IOUSBWorkLoop)
36
37protected:
38 void *fSleepToken;
39#ifndef __OPEN_SOURCE__
40lck_grp_t *fLockGroup;
41#endif
42bool init ( const char * controllerLocation );
43void free ( void );
44
45 // Overrides to check for sleeping
46 virtual void closeGate();
47 virtual bool tryCloseGate();
48
49public:
50 // Create a workloop
51 static IOUSBWorkLoop * workLoop(const char * controllerLocation);
52
53 // Put workloop to sleep (Must have gate closed, opens gate if successful)
54 virtual IOReturn sleep(void *token);
55
56 // Wake workloop up (closes gate if successful)
57 virtual IOReturn wake(void *token);
58
59 void CloseGate(void);
60 void OpenGate(void);
61};
62
63#endif /* ! _IOKIT_IOUSBWORKLOOP_H */
64
65

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