public bool Read(OPCDATASOURCE src, int[] arrHSrv, out OPCItemState[] arrStat)
{
arrStat = null;
int count = arrHSrv.Length;
IntPtr ptrStat;
IntPtr ptrErr;
// FIXME: check if ifSync valid?
int hresult = ifSync.Read(src, count, arrHSrv, out ptrStat, out ptrErr);
if (HRESULTS.Failed(hresult))
{
Marshal.ThrowExceptionForHR(hresult);
}
int runErr = (int)ptrErr;
int runStat = (int)ptrStat;
if ((runErr == 0) || (runStat == 0))
{
Marshal.ThrowExceptionForHR(HRESULTS.E_ABORT);
}
arrStat = new OPCItemState[count];
for (int i = 0; i < count; i++)
{ // WORKAROUND !!!
arrStat[i] = new OPCItemState();
arrStat[i].Error = Marshal.ReadInt32((IntPtr)runErr);
runErr += 4;
arrStat[i].HandleClient = Marshal.ReadInt32((IntPtr)runStat);
if (HRESULTS.Succeeded(arrStat[i].Error))
{
short vt = Marshal.ReadInt16((IntPtr)(runStat + 16));
if (vt == (short)VarEnum.VT_ERROR)
{
arrStat[i].Error = Marshal.ReadInt32((IntPtr)(runStat + 24));
}
arrStat[i].TimeStamp = Marshal.ReadInt64((IntPtr)(runStat + 4));
arrStat[i].Quality = Marshal.ReadInt16((IntPtr)(runStat + 12));
arrStat[i].DataValue = Marshal.GetObjectForNativeVariant((IntPtr)(runStat + 16));
VariantClear((IntPtr)(runStat + 16));
}
else
{
arrStat[i].DataValue = null;
}
runStat += 32;
}
Marshal.DestroyStructure(ptrStat, typeof(tagOPCITEMSTATE));
Marshal.FreeCoTaskMem(ptrStat);
Marshal.FreeCoTaskMem(ptrErr);
return(hresult == HRESULTS.S_OK);
}
public bool Read(OPCDATASOURCE src, int[] arrHSrv, out OPCItemState[] arrStat)
{
arrStat = null;
int count = arrHSrv.Length;
IntPtr ptrStat;
IntPtr ptrErr;
// FIXME: check if ifSync valid?
int hresult = ifSync.Read(src, count, arrHSrv, out ptrStat, out ptrErr);
if (HRESULTS.Failed(hresult))
Marshal.ThrowExceptionForHR(hresult);
int runErr = (int)ptrErr;
int runStat = (int)ptrStat;
if ((runErr == 0) || (runStat == 0))
Marshal.ThrowExceptionForHR(HRESULTS.E_ABORT);
arrStat = new OPCItemState[count];
for (int i = 0; i < count; i++)
{ // WORKAROUND !!!
arrStat[i] = new OPCItemState();
arrStat[i].Error = Marshal.ReadInt32((IntPtr)runErr);
runErr += 4;
arrStat[i].HandleClient = Marshal.ReadInt32((IntPtr)runStat);
if (HRESULTS.Succeeded(arrStat[i].Error))
{
short vt = Marshal.ReadInt16((IntPtr)(runStat + 16));
if (vt == (short)VarEnum.VT_ERROR)
arrStat[i].Error = Marshal.ReadInt32((IntPtr)(runStat + 24));
arrStat[i].TimeStamp = Marshal.ReadInt64((IntPtr)(runStat + 4));
arrStat[i].Quality = Marshal.ReadInt16((IntPtr)(runStat + 12));
arrStat[i].DataValue = Marshal.GetObjectForNativeVariant((IntPtr)(runStat + 16));
VariantClear((IntPtr)(runStat + 16));
}
else
arrStat[i].DataValue = null;
runStat += 32;
}
Marshal.DestroyStructure(ptrStat, typeof(tagOPCITEMSTATE));
Marshal.FreeCoTaskMem(ptrStat);
Marshal.FreeCoTaskMem(ptrErr);
return hresult == HRESULTS.S_OK;
}