public bool Read(OPCDataSource p_Src, int[] p_ArrHSrv, out OPCItemState[] p_ArrStat)
{
p_ArrStat = null;
int l_Count = p_ArrHSrv.Length;
IntPtr l_PtrStat;
IntPtr l_PtrErr;
int l_HResult = m_IfSync.Read(p_Src, l_Count, p_ArrHSrv, out l_PtrStat, out l_PtrErr);
if (HResults.Failed(l_HResult))
{
Marshal.ThrowExceptionForHR(l_HResult);
}
int l_RunErr = (int)l_PtrErr;
int l_RunStat = (int)l_PtrStat;
if ((l_RunErr == 0) || (l_RunStat == 0))
{
Marshal.ThrowExceptionForHR(HResults.E_ABORT);
}
p_ArrStat = new OPCItemState[l_Count];
for (int i = 0; i < l_Count; ++i)
{
p_ArrStat[i] = new OPCItemState();
p_ArrStat[i].Error = Marshal.ReadInt32((IntPtr)l_RunErr);
l_RunErr += 4;
p_ArrStat[i].HandleClient = Marshal.ReadInt32((IntPtr)l_RunStat);
if (HResults.Succeeded(p_ArrStat[i].Error))
{
short l_VT = Marshal.ReadInt16((IntPtr)(l_RunStat + 16));
if (l_VT == (short)VarEnum.VT_ERROR)
{
p_ArrStat[i].Error = Marshal.ReadInt32((IntPtr)(l_RunStat + 24));
}
p_ArrStat[i].Timestamp = Marshal.ReadInt64((IntPtr)(l_RunStat + 4));
p_ArrStat[i].Quality = Marshal.ReadInt16((IntPtr)(l_RunStat + 12));
p_ArrStat[i].DataValue = Marshal.GetObjectForNativeVariant((IntPtr)(l_RunStat + 16));
DummyVariant.VariantClear((IntPtr)(l_RunStat + 16));
}
else
{
p_ArrStat[i].DataValue = null;
}
l_RunStat += 32;
}
Marshal.FreeCoTaskMem(l_PtrStat);
Marshal.FreeCoTaskMem(l_PtrErr);
return(l_HResult == HResults.S_OK);
}
void IOPCDataCallback.OnReadComplete(int p_TransID, int p_Group, int p_MasterQuality,
int p_MasterError, int p_Count, IntPtr p_ClientItems, IntPtr p_Values,
IntPtr p_Qualities, IntPtr p_TimeStamps, IntPtr p_Errors)
{
Trace.WriteLine("OPCGroup.OnReadComplete");
if ((p_Count == 0) || (p_Group != m_State.HandleClient))
{
return;
}
int l_Count = (int)p_Count;
int l_RunH = (int)p_ClientItems;
int l_RunV = (int)p_Values;
int l_RunQ = (int)p_Qualities;
int l_RunT = (int)p_TimeStamps;
int l_RunE = (int)p_Errors;
OPCItemState[] l_Sts = new OPCItemState[l_Count];
for (int i = 0; i < l_Count; ++i)
{
l_Sts[i] = new OPCItemState();
l_Sts[i].Error = Marshal.ReadInt32((IntPtr)l_RunE);
l_RunE += 4;
l_Sts[i].HandleClient = Marshal.ReadInt32((IntPtr)l_RunH);
l_RunH += 4;
if (HResults.Succeeded(l_Sts[i].Error))
{
short l_VT = Marshal.ReadInt16((IntPtr)l_RunV);
if (l_VT == (short)VarEnum.VT_ERROR)
{
l_Sts[i].Error = Marshal.ReadInt32((IntPtr)(l_RunV + 8));
}
l_Sts[i].DataValue = Marshal.GetObjectForNativeVariant((IntPtr)l_RunV);
l_Sts[i].Quality = Marshal.ReadInt16((IntPtr)l_RunQ);
l_Sts[i].Timestamp = Marshal.ReadInt64((IntPtr)l_RunT);
}
l_RunV += DummyVariant.CONST_SIZE;
l_RunQ += 2;
l_RunT += 8;
}
ReadCompleteEventArgs l_Event = new ReadCompleteEventArgs(p_TransID, p_Group, p_MasterQuality, p_MasterError, l_Sts);
if (ReadCompleted != null)
{
ReadCompleted(this, l_Event);
}
}
