iopcasyncio.cpp

此为Insight opc client InfoServerExplorer源程序

/////////////////////////////////////////////////////////////////////////////
//
//  OPC Data Access VC++ Client:	IOPCAsyncIO.CPP
//									(Source File)
//
/////////////////////////////////////////////////////////////////////////////
//
//          Author: Raphael Imhof
//    Initial Date: 11/04/98
//       $Workfile: IOPCAsyncIO.cpp $
//       $Revision: 1 $
//           $Date: 7/27/99 5:23p $
//   Target System: Microsoft Windows NT 4.0
//     Environment: Visual C++ 5.0 / OPC DataAccess 1.0
//         Remarks: 
//
/////////////////////////////////////////////////////////////////////////////
//
//     Description: implementation of the CIOPCAsyncIO class.
//					IOPCAsyncIO wrapper.
//					
//
/////////////////////////////////////////////////////////////////////////////
//
//  History of Changes     (Please remove very old comments and blank lines!)
//            $Log: /IDK/OPCServer/clients/VC++/InfoServerExplorer/IOPCAsyncIO.cpp $
// 
// 1     7/27/99 5:23p Imhof
// 
// 1     7/27/99 5:18p Imhof
// 
// 3     1/15/99 6:43p Imhof
// Updated legal notice.
// 
// 2     11/10/98 2:20p Imhof
// Added file header's.
// 
//  $Nokeywords:$ (To avoid useless search while checking in.)
/////////////////////////////////////////////////////////////////////////////
//  Copyright (C) 1998, Siemens Building Technologies, Inc. Landis Division
//
// SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING
// EXAMPLES OF CODE AS SAMPLE ONLY.
//
// SIEMENS BUILDING TECHNOLOGIES, INC.  MAKES NO REPRESENTATIONS
// OR WARRANTIES OF ANY KIND  WITH RESPECT TO THE VALIDTY OF THE 
// CODES   OR   DESIRED   RESULTS   AND   DISCLAIMS   ALL   SUCH 
// REPRESENTATIONS   AND   WARRANTIES,  INCLUDING  FOR  EXAMPLE, 
// WARRANTIES  OF  MERCHANTABILITY  AND FITNESS FOR A PARTICULAR 
// PURPOSE.    SIEMENS  BUILIDNG  TECHNOLOGIES,  INC.  DOES  NOT 
// REPRESENT  OR  WARRANT  THAT  THE  FOLLOWING CODE SAMPLES ARE 
// ACCURATE, VALID, COMPLETE OR CURRENT.
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "infoserverexplorer.h"
#include "IOPCAsyncIO.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CIOPCAsyncIO::CIOPCAsyncIO(CComPtr<IOPCAsyncIO> pOPCAsyncIO)
{
	m_pOPCAsyncIO = pOPCAsyncIO;
}

CIOPCAsyncIO::CIOPCAsyncIO(CComPtr<IOPCGroupStateMgt> pOPCGroup)
{
	if(FAILED(pOPCGroup->QueryInterface(IID_IOPCAsyncIO, (void**)&m_pOPCAsyncIO)))
	{
		m_pOPCAsyncIO = NULL;
		TRACE("CIOPCAsyncIO() \n");
	}
}

CIOPCAsyncIO::~CIOPCAsyncIO()
{

}

HRESULT CIOPCAsyncIO::Write(	DWORD			dwConnection,
								DWORD	        dwNumItems,
								OPCHANDLE*		phServer,
								VARIANT*		pItemValues,
								DWORD*			pTransactionID,
								HRESULT**		ppErrors )
{
	if(m_pOPCAsyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCAsyncIO->Write(dwConnection, dwNumItems, phServer, pItemValues, pTransactionID, ppErrors);

	if( FAILED( hr ) )
		TRACE(_T("IOPCAsyncIO::Write\n"));
     
	return hr; 
}

HRESULT CIOPCAsyncIO::Read(	DWORD			dwConnection,
							OPCDATASOURCE	dwSource,
							DWORD	        dwNumItems,
							OPCHANDLE*		phServer,
							DWORD*			pTransactionID,
							HRESULT**		ppErrors )
{
	if(m_pOPCAsyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCAsyncIO->Read(dwConnection, dwSource, dwNumItems, phServer, pTransactionID, ppErrors);

	if( FAILED( hr ) )
		TRACE(_T("IOPCAsyncIO::Read\n"));
     
	return hr; 
}

HRESULT CIOPCAsyncIO::Refresh(	DWORD			dwConnection,
								OPCDATASOURCE	dwSource,
								DWORD*			pTransactionID)
{
	if(m_pOPCAsyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCAsyncIO->Refresh(dwConnection, dwSource, pTransactionID);

	if( FAILED( hr ) )
		TRACE(_T("IOPCAsyncIO::Refresh\n"));
     
	return hr; 
}

HRESULT	CIOPCAsyncIO::Cancel(DWORD dwTransactionID)
{
	if(m_pOPCAsyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCAsyncIO->Cancel(dwTransactionID);

	if( FAILED( hr ) )
		TRACE(_T("IOPCAsyncIO::Cancel\n"));
     
	return hr; 
}