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/**************************************************************************
A/V Stream Camera Sample
Copyright (c) 2014, Microsoft Corporation.
File:
workitem.h
Abstract:
This module contains a class wrapper definition for an IO_WORKITEM.
A KWorkItem inherits from CRef and is reference counted. The object
cannot be destroyed until all references are released. This includes
the reference held when the workitem is in flight. This allows you
to store the workitem in an object that has a lifecycle shorter than
the parent device object.
History:
created 5/30/2014
**************************************************************************/
#pragma once
class KWorkItem :
public CRef // Reference counted...
{
private:
PIO_WORKITEM m_WorkItem;
PIO_WORKITEM_ROUTINE m_Callback;
PVOID m_Context;
WORK_QUEUE_TYPE m_QueueType;
public:
KWorkItem(
_In_ PDEVICE_OBJECT DeviceObj,
_In_ PIO_WORKITEM_ROUTINE Callback,
_In_ PVOID Context=nullptr,
_In_ WORK_QUEUE_TYPE QueueType=NormalWorkQueue
);
virtual
~KWorkItem();
BOOLEAN
IsValid()
{
return m_WorkItem != nullptr;
}
// Returns FALSE if failed to start.
BOOLEAN
Start();
private:
static
IO_WORKITEM_ROUTINE
Handler;
};
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