/// <summary>
/// Creates an event object for the overlapped structure used with ReadFile.
/// </summary>
///
/// <param name="hidOverlapped"> the overlapped structure </param>
/// <param name="eventObject"> the event object </param>
internal void PrepareForOverlappedTransfer(ref NativeOverlapped hidOverlapped, ref IntPtr eventObject)
{
try
{
// ***
// API function: CreateEvent
// Purpose: Creates an event object for the overlapped structure used with ReadFile.
// Accepts:
// A security attributes structure or IntPtr.Zero.
// Manual Reset = False (The system automatically resets the state to nonsignaled
// after a waiting thread has been released.)
// Initial state = False (not signaled)
// An event object name (optional)
// Returns: a handle to the event object
// ***
eventObject = FileIO.CreateEvent(IntPtr.Zero, false, false, "");
// Set the members of the overlapped structure.
hidOverlapped.OffsetLow = 0;
hidOverlapped.OffsetHigh = 0;
hidOverlapped.EventHandle = eventObject;
}
catch (Exception ex)
{
DisplayException(MODULE_NAME, ex);
throw;
}
}
/// <summary>
/// Creates an event object for the overlapped structure used with
/// ReadFile. Called before the first call to ReadFile.
/// </summary>
///
/// <param name="hidOverlapped"> the overlapped structure </param>
/// <param name="eventObject"> the event object </param>
public void PrepareForOverlappedTransfer(ref FileIO.OVERLAPPED hidOverlapped, ref SafeWaitHandle eventObject)
{
try
{
// ***
// API function: CreateEvent
// Purpose: Creates an event object for the overlapped structure used with ReadFile.
// Accepts:
// A security attributes structure.
// Manual Reset = False (The system automatically resets the state to nonsignaled
// after a waiting thread has been released.)
// Initial state = True (signaled)
// An event object name (optional)
// Returns: a handle to the event object
// ***
eventObject = FileIO.CreateEvent(null, System.Convert.ToInt32(false), System.Convert.ToInt32(true), "");
// Debug.WriteLine(MyDebugging.ResultOfAPICall("CreateEvent"))
// Set the members of the overlapped structure.
hidOverlapped.Offset = 0;
hidOverlapped.OffsetHigh = 0;
hidOverlapped.hEvent = eventObject;
readyForOverlappedTransfer = true;
}
catch (Exception ex)
{
DisplayException(MODULE_NAME, ex);
}
}