/* * Copyright (c) 2002-2007 Apple Inc. All rights reserved. * * @APPLE_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. 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_LICENSE_HEADER_END@ */ #ifndef __IOKIT_SCSI_PARALLEL_TIMER_H__ #define __IOKIT_SCSI_PARALLEL_TIMER_H__ //----------------------------------------------------------------------------- // Includes //----------------------------------------------------------------------------- // General IOKit includes #include <IOKit/IOWorkLoop.h> #include <IOKit/IOTimerEventSource.h> // SCSI Parallel Family includes #include "SCSIParallelTask.h" //----------------------------------------------------------------------------- // Constants //----------------------------------------------------------------------------- #define kTimeoutValueNone 0 //----------------------------------------------------------------------------- // Class Declarations //----------------------------------------------------------------------------- class SCSIParallelTimer : public IOTimerEventSource { OSDeclareDefaultStructors ( SCSIParallelTimer ) public: static SCSIParallelTimer * CreateTimerEventSource ( OSObject * owner, Action action = 0 ); bool Init ( OSObject * owner, Action action ); void Enable ( void ); void Disable ( void ); void CancelTimeout ( void ); bool Rearm ( void ); void BeginTimeoutContext ( void ); void EndTimeoutContext ( void ); IOReturn SetTimeout ( SCSIParallelTaskIdentifier taskIdentifier, UInt32 timeoutInMS = kTimeoutValueNone ); void RemoveTask ( SCSIParallelTaskIdentifier taskIdentifier ); SCSIParallelTaskIdentifier GetExpiredTask ( void ); protected: inline static SInt32 CompareDeadlines ( AbsoluteTime time1, AbsoluteTime time2 ); AbsoluteTime GetDeadline ( SCSIParallelTask * task ); UInt32 GetTimeoutDuration ( SCSIParallelTask * task ); private: queue_head_t fListHead; bool fHandlingTimeout; }; #endif /* __IOKIT_SCSI_PARALLEL_TIMER_H__ */