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Annotation of XNU/iokit/Kernel/IOEventSource.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 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) 1998 Apple Computer, Inc.  All rights reserved.
        !            24: 
        !            25: HISTORY
        !            26:     1998-7-13  Godfrey van der Linden(gvdl)
        !            27:         Created.
        !            28: ]*/
        !            29: #include <IOKit/IOLib.h>
        !            30: 
        !            31: #include <IOKit/IOEventSource.h>
        !            32: #include <IOKit/IOWorkLoop.h>
        !            33: 
        !            34: #define super OSObject
        !            35: 
        !            36: OSDefineMetaClass(IOEventSource, OSObject)
        !            37: OSDefineAbstractStructors(IOEventSource, OSObject)
        !            38: 
        !            39: bool IOEventSource::init(OSObject *inOwner,
        !            40:                          Action inAction = 0)
        !            41: {
        !            42:     if (!inOwner)
        !            43:         return false;
        !            44: 
        !            45:     owner = inOwner;
        !            46: 
        !            47:     if ( !super::init() )
        !            48:         return false;
        !            49: 
        !            50:     (void) setAction(inAction);
        !            51:     enabled = true;
        !            52: 
        !            53:     return true;
        !            54: }
        !            55: 
        !            56: IOEventSource::Action IOEventSource::getAction () const { return action; };
        !            57: 
        !            58: void IOEventSource::setAction(Action inAction)
        !            59: {
        !            60:     action = inAction;
        !            61: }
        !            62: 
        !            63: IOEventSource *IOEventSource::getNext() const { return eventChainNext; };
        !            64: 
        !            65: void IOEventSource::setNext(IOEventSource *inNext)
        !            66: {
        !            67:     eventChainNext = inNext;
        !            68: }
        !            69: 
        !            70: void IOEventSource::enable()
        !            71: {
        !            72:     enabled = true;
        !            73:     if (workLoop)
        !            74:         return workLoop->signalWorkAvailable();
        !            75: }
        !            76: 
        !            77: void IOEventSource::disable()
        !            78: {
        !            79:     enabled = false;
        !            80: }
        !            81: 
        !            82: bool IOEventSource::isEnabled() const
        !            83: {
        !            84:     return enabled;
        !            85: }
        !            86: 
        !            87: void IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
        !            88: {
        !            89:     workLoop = inWorkLoop;
        !            90: }
        !            91: 
        !            92: IOWorkLoop *IOEventSource::getWorkLoop() const
        !            93: {
        !            94:     return workLoop;
        !            95: }
        !            96: 
        !            97: bool IOEventSource::onThread() const
        !            98: {
        !            99:     return (workLoop != 0) && workLoop->onThread();
        !           100: }

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