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/*
29Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
30
31HISTORY
32    1998-7-13	Godfrey van der Linden(gvdl)
33        Created.
34]*/
35#include <IOKit/IOLib.h>
36
37#include <IOKit/IOEventSource.h>
38#include <IOKit/IOWorkLoop.h>
39
40#define super OSObject
41
42OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject)
43OSMetaClassDefineReservedUnused(IOEventSource, 0);
44OSMetaClassDefineReservedUnused(IOEventSource, 1);
45OSMetaClassDefineReservedUnused(IOEventSource, 2);
46OSMetaClassDefineReservedUnused(IOEventSource, 3);
47OSMetaClassDefineReservedUnused(IOEventSource, 4);
48OSMetaClassDefineReservedUnused(IOEventSource, 5);
49OSMetaClassDefineReservedUnused(IOEventSource, 6);
50OSMetaClassDefineReservedUnused(IOEventSource, 7);
51
52/* inline function implementations */
53void IOEventSource::signalWorkAvailable()	{ workLoop->signalWorkAvailable(); }
54void IOEventSource::openGate()			{ workLoop->openGate(); }
55void IOEventSource::closeGate()			{ workLoop->closeGate(); }
56bool IOEventSource::tryCloseGate()		{ return workLoop->tryCloseGate(); }
57int IOEventSource::sleepGate(void *event, UInt32 type)
58        { return workLoop->sleepGate(event, type); }
59void IOEventSource::wakeupGate(void *event, bool oneThread)
60        { workLoop->wakeupGate(event, oneThread); }
61
62bool IOEventSource::init(OSObject *inOwner,
63                         Action inAction)
64{
65    if (!inOwner)
66        return false;
67
68    owner = inOwner;
69
70    if ( !super::init() )
71        return false;
72
73    (void) setAction(inAction);
74    enabled = true;
75
76    return true;
77}
78
79IOEventSource::Action IOEventSource::getAction () const { return action; };
80
81void IOEventSource::setAction(Action inAction)
82{
83    action = inAction;
84}
85
86IOEventSource *IOEventSource::getNext() const { return eventChainNext; };
87
88void IOEventSource::setNext(IOEventSource *inNext)
89{
90    eventChainNext = inNext;
91}
92
93void IOEventSource::enable()
94{
95    enabled = true;
96    if (workLoop)
97        return signalWorkAvailable();
98}
99
100void IOEventSource::disable()
101{
102    enabled = false;
103}
104
105bool IOEventSource::isEnabled() const
106{
107    return enabled;
108}
109
110void IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
111{
112    if ( !inWorkLoop )
113        disable();
114    workLoop = inWorkLoop;
115}
116
117IOWorkLoop *IOEventSource::getWorkLoop() const
118{
119    return workLoop;
120}
121
122bool IOEventSource::onThread() const
123{
124    return (workLoop != 0) && workLoop->onThread();
125}
126