FreeBSD/Linux Kernel Cross Reference
sys/iokit/IOKit/IOPMEventSource.h

     /*
      * Copyright (c) 2001-2002 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
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     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
     
     #ifndef _IOPMEVENTSOURCE_H_
     #define _IOPMEVENTSOURCE_H_
     
     #include <IOKit/IOWorkLoop.h>
     #include <IOKit/IOEventSource.h>
        
        // Queue of requested states
         typedef struct {
            unsigned long           state;
            void                    *next;
        } ActivityTickleStateList;
    
     class IOPMEventSource : public IOEventSource
     {
        OSDeclareDefaultStructors(IOPMEventSource);
    
    protected:
        virtual bool checkForWork(void);
    
        ActivityTickleStateList             *states;
    
    public:
        typedef void (*Action)(OSObject *owner, unsigned long state);
    
        // static initialiser
        static IOPMEventSource *PMEventSource(OSObject *owner, Action action);
        
        virtual bool init(OSObject *owner, Action action);
         
        // Enqueues an activityTickle request to be executed on the workloop
        virtual IOReturn activityTickleOccurred(unsigned long);
     };
     
     #endif /* _IOPMEVENTSOURCE_H_ */
     

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