mirror of
https://github.com/reactos/reactos.git
synced 2025-03-10 10:14:44 +00:00
77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
/*++
|
|
|
|
Copyright (c) Microsoft. All rights reserved.
|
|
|
|
Module Name:
|
|
|
|
EventQueueUm.cpp
|
|
|
|
Abstract:
|
|
|
|
This module implements user mode specific functionality of event queue
|
|
|
|
This functionality needed to be separated out since the KM portion takes
|
|
a reference on driver object because KM MxWorkItem::_Free does not wait for
|
|
callback to return (i.e. rundown synchronously).
|
|
|
|
MxWorkItem::_Free in UM currently waits for callback to return (i.e. runs
|
|
down synchronously) hence does not need a reference on driver/devstack
|
|
object (see comments on top of MxWorkItemUm.h file).
|
|
|
|
In future if UM work-item is made similar to km workitem, UMDF may need to
|
|
ensure that modules stay loaded, though the mechanism to ensure that would
|
|
likely be different from a reference on the driver. It would likely be a
|
|
reference on the devicestack object.
|
|
|
|
Environment:
|
|
|
|
User mode only
|
|
|
|
Revision History:
|
|
|
|
|
|
|
|
|
|
--*/
|
|
|
|
#include "pnppriv.hpp"
|
|
|
|
VOID
|
|
FxWorkItemEventQueue::QueueWorkItem(
|
|
VOID
|
|
)
|
|
{
|
|
//
|
|
// In user mode WorkItem::_Free waits for workitem callbacks to return
|
|
// So we don't need outstanding reference on driver object or the devstack
|
|
//
|
|
|
|
m_WorkItem.Enqueue(
|
|
(PMX_WORKITEM_ROUTINE) _WorkItemCallback,
|
|
(FxEventQueue*) this);
|
|
}
|
|
|
|
VOID
|
|
FxWorkItemEventQueue::_WorkItemCallback(
|
|
__in MdDeviceObject DeviceObject,
|
|
__in PVOID Context
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
This is the work item that attempts to run the machine on a thread
|
|
separate from the one the caller was using. It implements step 9 above.
|
|
|
|
--*/
|
|
{
|
|
FxWorkItemEventQueue* This = (FxWorkItemEventQueue*) Context;
|
|
|
|
UNREFERENCED_PARAMETER(DeviceObject);
|
|
|
|
//
|
|
// In user mode WorkItem::_Free waits for workitem callbacks to return
|
|
// So we don't need outstanding reference on driver object
|
|
//
|
|
|
|
This->EventQueueWorker();
|
|
}
|