//Release the device handle counter. Must be called for every GetReaderHandle to prevent resource leak.
public static void ReleaseReaderHandle(DPUruNet.Reader reader)
{
BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
FieldInfo field = reader.GetType().GetField("m_handle", flags);
System.Runtime.InteropServices.SafeHandle privateHandle = (System.Runtime.InteropServices.SafeHandle)field.GetValue(reader);
if (privateHandle != null && !privateHandle.IsInvalid && !privateHandle.IsClosed)
{
privateHandle.DangerousRelease(); //decrement the device handle counter so the reader can be freed
}
}
//Must be called to get device handle to control the LEDs (this must be coupled with a ReleaseReaderHandle)
public static IntPtr GetReaderHandle(DPUruNet.Reader reader)
{
//We must use reflection here to get the private device handle
BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
FieldInfo field = reader.GetType().GetField("m_handle", flags);
System.Runtime.InteropServices.SafeHandle privateHandle = (System.Runtime.InteropServices.SafeHandle)field.GetValue(reader);
Boolean bSuccess = false;
if (privateHandle != null)
{
privateHandle.DangerousAddRef(ref bSuccess); //increment the reference counter for the reader\device handle
}
if (bSuccess)
{
return(privateHandle.DangerousGetHandle()); //return the handle to the caller
}
else
{
return(IntPtr.Zero);
}
}
