FreeBSD/Linux Kernel Cross Reference
sys/iokit/Kernel/IOEventSource.cpp

     /*
      * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
      * Version 2.0 (the 'License'). You may not use this file except in
      * compliance with the License. The rights granted to you under the License
     * may not be used to create, or enable the creation or redistribution of,
     * unlawful or unlicensed copies of an Apple operating system, or to
     * circumvent, violate, or enable the circumvention or violation of, any
     * terms of an Apple operating system software license agreement.
     * 
     * Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    /*
    Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
    
    HISTORY
        1998-7-13   Godfrey van der Linden(gvdl)
            Created.
    ]*/
    #include <IOKit/IOLib.h>
    
    #include <IOKit/IOEventSource.h>
    #include <IOKit/IOWorkLoop.h>
    
    #define super OSObject
    
    OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject)
    OSMetaClassDefineReservedUnused(IOEventSource, 0);
    OSMetaClassDefineReservedUnused(IOEventSource, 1);
    OSMetaClassDefineReservedUnused(IOEventSource, 2);
    OSMetaClassDefineReservedUnused(IOEventSource, 3);
    OSMetaClassDefineReservedUnused(IOEventSource, 4);
    OSMetaClassDefineReservedUnused(IOEventSource, 5);
    OSMetaClassDefineReservedUnused(IOEventSource, 6);
    OSMetaClassDefineReservedUnused(IOEventSource, 7);
    
    /* inline function implementations */
    void IOEventSource::signalWorkAvailable()       { workLoop->signalWorkAvailable(); }
    void IOEventSource::openGate()                  { workLoop->openGate(); }
    void IOEventSource::closeGate()                 { workLoop->closeGate(); }
    bool IOEventSource::tryCloseGate()              { return workLoop->tryCloseGate(); }
    int IOEventSource::sleepGate(void *event, UInt32 type)
            { return workLoop->sleepGate(event, type); }
    void IOEventSource::wakeupGate(void *event, bool oneThread)
            { workLoop->wakeupGate(event, oneThread); }
    
    bool IOEventSource::init(OSObject *inOwner,
                             Action inAction)
    {
        if (!inOwner)
            return false;
    
        owner = inOwner;
    
        if ( !super::init() )
            return false;
    
        (void) setAction(inAction);
        enabled = true;
    
        return true;
    }
    
    IOEventSource::Action IOEventSource::getAction () const { return action; };
    
    void IOEventSource::setAction(Action inAction)
    {
        action = inAction;
    }
    
    IOEventSource *IOEventSource::getNext() const { return eventChainNext; };
    
    void IOEventSource::setNext(IOEventSource *inNext)
    {
        eventChainNext = inNext;
    }
    
    void IOEventSource::enable()
    {
        enabled = true;
        if (workLoop)
            return signalWorkAvailable();
    }
    
   void IOEventSource::disable()
   {
       enabled = false;
   }
   
   bool IOEventSource::isEnabled() const
   {
       return enabled;
   }
   
   void IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
   {
       if ( !inWorkLoop )
           disable();
       workLoop = inWorkLoop;
   }
   
   IOWorkLoop *IOEventSource::getWorkLoop() const
   {
       return workLoop;
   }
   
   bool IOEventSource::onThread() const
   {
       return (workLoop != 0) && workLoop->onThread();
   }

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