115 lines
3.2 KiB
C++
115 lines
3.2 KiB
C++
// --------------------------------------------------------------------------
|
|
// Module Name: WorkItem.cpp
|
|
//
|
|
// Copyright (c) 1999-2000, Microsoft Corporation
|
|
//
|
|
// Class that implements the handling of queuing a work item and calling the
|
|
// entry point of the work item function when entered in a worker thread.
|
|
//
|
|
// History: 1999-11-26 vtan created
|
|
// 2000-08-25 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
#include "StandardHeader.h"
|
|
#include "WorkItem.h"
|
|
|
|
#include "StatusCode.h"
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CWorkItem::CWorkItem
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Constructor for CWorkItem.
|
|
//
|
|
// History: 1999-11-26 vtan created
|
|
// 2000-08-25 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
CWorkItem::CWorkItem (void)
|
|
|
|
{
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CWorkItem::~CWorkItem
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Destructor for CWorkItem.
|
|
//
|
|
// History: 1999-11-26 vtan created
|
|
// 2000-08-25 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
CWorkItem::~CWorkItem (void)
|
|
|
|
{
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CWorkItem::Queue
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Queues the work item entry function to be executed.
|
|
//
|
|
// History: 1999-11-26 vtan created
|
|
// 2000-08-25 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CWorkItem::Queue (void)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
// Initially add a reference to this work item. If the queue succeeds
|
|
// then leave the reference for WorkItemEntryProc to release. Otherwise
|
|
// on failure release the reference.
|
|
|
|
AddRef();
|
|
if (QueueUserWorkItem(WorkItemEntryProc, this, WT_EXECUTEDEFAULT) != FALSE)
|
|
{
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
Release();
|
|
status = CStatusCode::StatusCodeOfLastError();
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CWorkItem::WorkItemEntryProc
|
|
//
|
|
// Arguments: pParameter = Context pointer passed in when queued.
|
|
//
|
|
// Returns: DWORD
|
|
//
|
|
// Purpose: Callback entry point for queued work item. Takes the context
|
|
// pointer and calls the virtual function that implements the
|
|
// actual work.
|
|
//
|
|
// History: 1999-11-26 vtan created
|
|
// 2000-08-25 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
DWORD WINAPI CWorkItem::WorkItemEntryProc (void *pParameter)
|
|
|
|
{
|
|
CWorkItem *pWorkItem;
|
|
|
|
pWorkItem = reinterpret_cast<CWorkItem*>(pParameter);
|
|
pWorkItem->Entry();
|
|
pWorkItem->Release();
|
|
return(0);
|
|
}
|
|
|