/*------------------------------------------------------
* Execute SyncWrite
*
* (ret) True OK
* False NG
* ------------------------------------------------------*/
public bool SyncWrite(int[] ServerHd, object[] Value)
{
int iItemCount = ServerHd.Length;
IOPCSyncIO OPCSyncIO;
IOPCSyncIO2 OPCSyncIO2;
IntPtr ppErrors;
int[] errors = new int[iItemCount];
try
{
switch (m_OpcdaVer)
{
case DEF_OPCDA.VER_30:
OPCSyncIO2 = (IOPCSyncIO2)m_OPCGroup2;
OPCSyncIO2.Write(iItemCount, ServerHd, Value, out ppErrors);
Marshal.Copy(ppErrors, errors, 0, iItemCount);
Marshal.FreeCoTaskMem(ppErrors);
break;
case DEF_OPCDA.VER_10:
case DEF_OPCDA.VER_20:
default:
OPCSyncIO = (IOPCSyncIO)m_OPCGroup;
OPCSyncIO.Write(iItemCount, ServerHd, Value, out ppErrors);
Marshal.Copy(ppErrors, errors, 0, iItemCount);
Marshal.FreeCoTaskMem(ppErrors);
break;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "SyncWrite");
return(false);
}
// erase errors
System.GC.Collect(); //04/12/29 Revised Memory Leak
return(true);
}
/*------------------------------------------------------
* Execute ReadMaxAge
*
* (ret) True OK
* False NG
* ------------------------------------------------------*/
public bool ReadMaxAge(int MaxAge, int[] ServerHd, object[] Values, OpcRcw.Da.FILETIME[] TimeStamps, short[] Qualities)
{
if (m_OpcdaVer != DEF_OPCDA.VER_30)
{
//MsgBox("This function is for OPCDA3.0.")
return(false);
}
int iItemCount = ServerHd.Length;
IOPCSyncIO2 OPCSyncIO2;
IntPtr ppItemVals;
IntPtr ppQualities;
IntPtr ppTimeStamps;
IntPtr ppErrors;
IntPtr posItem, posQual, posTime;
int[] Errors = new int[iItemCount];
int[] MaxAges = new int[iItemCount];
OpcRcw.Da.FILETIME ftTimeStamp;
int i;
for (i = 0; i < iItemCount; i++)
{
MaxAges[i] = MaxAge;
}
try
{
OPCSyncIO2 = (IOPCSyncIO2)m_OPCGroup2;
OPCSyncIO2.ReadMaxAge(iItemCount, ServerHd, MaxAges, out ppItemVals, out ppQualities, out ppTimeStamps, out ppErrors);
Marshal.Copy(ppErrors, Errors, 0, iItemCount);
posItem = ppItemVals;
posQual = ppQualities;
posTime = ppTimeStamps;
for (i = 0; i < iItemCount; i++)
{
if (Errors[i] == 0)
{
Values[i] = Marshal.GetObjectForNativeVariant(posItem);
Qualities[i] = Marshal.ReadInt16(posQual);
ftTimeStamp = (OpcRcw.Da.FILETIME)Marshal.PtrToStructure(posTime, typeof(OpcRcw.Da.FILETIME));
TimeStamps[i] = ftTimeStamp;
}
VariantClear(posItem); // 05/02/08 Release memory
Marshal.DestroyStructure(posQual, typeof(Int16)); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
posItem = (IntPtr)(posItem.ToInt32() + 16); // "16" is size of "VARIANT"
posQual = (IntPtr)(posQual.ToInt32() + 2); // "2" is size of "short"
Marshal.DestroyStructure(posTime, typeof(OpcRcw.Da.FILETIME)); // 05/02/08 Release memory
posTime = (IntPtr)(posTime.ToInt32() + Marshal.SizeOf(typeof(OpcRcw.Da.FILETIME))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
}
Marshal.FreeCoTaskMem(ppItemVals);
Marshal.FreeCoTaskMem(ppQualities);
Marshal.FreeCoTaskMem(ppTimeStamps);
Marshal.FreeCoTaskMem(ppErrors);
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "ReadMaxAge");
return(false);
}
// erase Errors
// erase MaxAges
System.GC.Collect(); //04/12/29 Revised Memory Leak
return(true);
}
/*------------------------------------------------------
* Execute SyncRead
*
* (ret) True OK
* False NG
* ------------------------------------------------------*/
public bool SyncRead(OpcRcw.Da.OPCDATASOURCE DataSource, int[] ServerHd, object[] Values, OpcRcw.Da.FILETIME[] TimeStamps, short[] Qualities)
{
int iItemCount = ServerHd.Length;
IOPCSyncIO OPCSyncIO;
IOPCSyncIO2 OPCSyncIO2;
IntPtr ppItemVal;
IntPtr ppErrors;
IntPtr posItem;
int[] Errors = new int[iItemCount];
OPCITEMSTATE ItemState;
int i;
try
{
switch (m_OpcdaVer)
{
case DEF_OPCDA.VER_30:
OPCSyncIO2 = (IOPCSyncIO2)m_OPCGroup2;
OPCSyncIO2.Read(DataSource, iItemCount, ServerHd, out ppItemVal, out ppErrors);
Marshal.Copy(ppErrors, Errors, 0, iItemCount);
posItem = ppItemVal;
for (i = 0; i < iItemCount; i++)
{
ItemState = (OPCITEMSTATE)Marshal.PtrToStructure(posItem, typeof(OPCITEMSTATE));
if (Errors[i] == 0)
{
Values[i] = ItemState.vDataValue;
TimeStamps[i] = ItemState.ftTimeStamp;
Qualities[i] = ItemState.wQuality;
}
Marshal.DestroyStructure(posItem, typeof(OPCITEMSTATE)); // 05/02/08 Release memory
//posItem = new IntPtr(posItem.ToInt32() + Marshal.SizeOf(typeof(OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
posItem = (IntPtr)(posItem.ToInt32() + Marshal.SizeOf(typeof(OpcRcw.Da.OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
}
Marshal.FreeCoTaskMem(ppItemVal);
Marshal.FreeCoTaskMem(ppErrors);
break;
case DEF_OPCDA.VER_10:
case DEF_OPCDA.VER_20:
default:
OPCSyncIO = (IOPCSyncIO)m_OPCGroup;
OPCSyncIO.Read(DataSource, iItemCount, ServerHd, out ppItemVal, out ppErrors);
Marshal.Copy(ppErrors, Errors, 0, iItemCount);
posItem = ppItemVal;
for (i = 0; i < iItemCount; i++)
{
ItemState = (OPCITEMSTATE)Marshal.PtrToStructure(posItem, typeof(OPCITEMSTATE));
if (Errors[i] == 0)
{
Values[i] = ItemState.vDataValue;
TimeStamps[i] = ItemState.ftTimeStamp;
Qualities[i] = ItemState.wQuality;
}
Marshal.DestroyStructure(posItem, typeof(OPCITEMSTATE)); // 05/02/08 Release memory
//posItem = new IntPtr(posItem.ToInt32() + Marshal.SizeOf(typeof(OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
posItem = (IntPtr)(posItem.ToInt32() + Marshal.SizeOf(typeof(OpcRcw.Da.OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
}
Marshal.FreeCoTaskMem(ppItemVal);
Marshal.FreeCoTaskMem(ppErrors);
break;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "SyncRead");
return(false);
}
// erase Errors
System.GC.Collect(); //04/12/29 Revised Memory Leak
return(true);
}
