//================================================================================================================
/// <summary>
/// Enables a callback method to be invoked when a certain condition is met
/// </summary>
/// <param name="callback">The callback delegate</param>
/// <param name="type">The callback type</param>
/// <param name="numberOfSamples">The number of samples that will be passed to the callback method</param>
//================================================================================================================
public void EnableCallback(InputScanCallbackDelegate callback, CallbackType callbackType, object callbackData)
{
Monitor.Enter(m_deviceLock);
if (callbackType == CallbackType.OnDataAvailable)
{
if (m_driverInterface.OnDataAvailableCallbackControl != null)
{
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnDataAvailableCallbackControl = new CallbackControl(this, callback, callbackType, callbackData);
}
else if (callbackType == CallbackType.OnInputScanComplete)
{
if (m_driverInterface.OnInputScanCompleteCallbackControl != null)
{
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnInputScanCompleteCallbackControl = new CallbackControl(this, callback, callbackType, callbackData);
}
else if (callbackType == CallbackType.OnInputScanError)
{
if (m_driverInterface.OnInputScanErrorCallbackControl != null)
{
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnInputScanErrorCallbackControl = new CallbackControl(this, callback, callbackType, callbackData);
}
//else if (callbackType == CallbackType.OnAcquisitionArmed)
//{
// if (m_driverInterface.OnInputScanErrorCallbackControl != null)
// {
// DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
// throw dex;
// }
// m_driverInterface.OnAcquisitionArmedCallbackControl = new CallbackControl(this, callback, callbackType, callbackData);
//}
Monitor.Exit(m_deviceLock);
}
//========================================================================================================
/// <summary>
/// ctor - for use with setting up a callback for an input scan
/// </summary>
/// <param name="daqDevice">A DaqDevice object</param>
/// <param name="numberOfSamples">The number of samples to pass to each callback </param>
/// <param name="callback">A InputScanCallbackDelegate</param>
//========================================================================================================
internal CallbackControl(DaqDevice daqDevice, InputScanCallbackDelegate callback, CallbackType type, object callbackData)
{
InitializeComponent();
m_daqDevice = daqDevice;
if (type == CallbackType.OnDataAvailable)
{
try
{
m_numberOfSamples = (int)callbackData;
}
catch (Exception)
{
System.Diagnostics.Debug.Assert(false, "OnDataAvailable callback data is not the correct data type");
}
}
m_callback = callback;
m_type = type;
}
public void EnableCallback(InputScanCallbackDelegate callback, CallbackType callbackType, object callbackData, bool executeOnUIThread)
{
Monitor.Enter(m_deviceLock);
if (callbackType == CallbackType.OnDataAvailable) {
if (m_driverInterface.OnDataAvailableCallbackControl != null) {
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnDataAvailableCallbackControl = new CallbackControl(this, callback, callbackType, callbackData, executeOnUIThread);
} else if (callbackType == CallbackType.OnInputScanComplete) {
if (m_driverInterface.OnInputScanCompleteCallbackControl != null) {
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnInputScanCompleteCallbackControl = new CallbackControl(this, callback, callbackType, callbackData, executeOnUIThread);
} else if (callbackType == CallbackType.OnInputScanError) {
if (m_driverInterface.OnInputScanErrorCallbackControl != null) {
DaqException dex = new DaqException(ErrorMessages.CallbackOperationAlreadyEnabled, ErrorCodes.CallbackOperationAlreadyEnabled);
throw dex;
}
m_driverInterface.OnInputScanErrorCallbackControl = new CallbackControl(this, callback, callbackType, callbackData, executeOnUIThread);
}
Monitor.Exit(m_deviceLock);
}
