protected HidDeviceData ReadData(int timeout)
{
var buffer = new byte[] { };
var status = HidDeviceData.ReadStatus.NoDataRead;
if (_deviceCapabilities.InputReportByteLength > 0)
{
uint bytesRead = 0;
buffer = CreateInputBuffer();
if (_deviceReadMode == DeviceMode.Overlapped)
{
var security = new NativeMethods.SecurityAttributes();
var overlapped = new NativeOverlapped();
var overlapTimeout = timeout <= 0 ? NativeMethods.WaitInfinite : timeout;
security.lpSecurityDescriptor = IntPtr.Zero;
security.bInheritHandle = true;
security.nLength = Marshal.SizeOf(security);
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(true), Convert.ToInt32(true), string.Empty);
try
{
var resultReadFile = NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
if (!resultReadFile && Marshal.GetLastWin32Error() == NativeMethods.ErrorIOPending)
{
var resultWaitForSingleObject = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout);
switch (resultWaitForSingleObject)
{
case NativeMethods.WaitObject0:
{
var resultGetOverlappedResult = NativeMethods.GetOverlappedResult(Handle, ref overlapped, out bytesRead, true);
NativeMethods.ResetEvent(overlapped.EventHandle);
status = HidDeviceData.ReadStatus.Success;
break;
}
case NativeMethods.WaitTimeout:
status = HidDeviceData.ReadStatus.WaitTimedOut;
buffer = new byte[] {};
break;
case NativeMethods.WaitFailed:
status = HidDeviceData.ReadStatus.WaitFail;
buffer = new byte[] {};
break;
default:
status = HidDeviceData.ReadStatus.NoDataRead;
buffer = new byte[] {};
break;
}
}
else
{
NativeMethods.ResetEvent(overlapped.EventHandle);
}
}
catch { status = HidDeviceData.ReadStatus.ReadError; }
finally { CloseDeviceIO(overlapped.EventHandle); }
/* ORIG!!
* overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(false), Convert.ToInt32(true), string.Empty);
* try
* {
* NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
*
* var result = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout);
*
* switch (result)
* {
* case NativeMethods.WAIT_OBJECT_0:
* {
* status = HidDeviceData.ReadStatus.Success;
* break;
* }
* case NativeMethods.WAIT_TIMEOUT:
* status = HidDeviceData.ReadStatus.WaitTimedOut;
* buffer = new byte[] { };
* break;
* case NativeMethods.WAIT_FAILED:
* status = HidDeviceData.ReadStatus.WaitFail;
* buffer = new byte[] { };
* break;
* default:
* status = HidDeviceData.ReadStatus.NoDataRead;
* buffer = new byte[] { };
* break;
* }
* }
* catch { status = HidDeviceData.ReadStatus.ReadError; }
* finally { CloseDeviceIO(overlapped.EventHandle); }*/
}
else
{
try
{
var overlapped = new NativeOverlapped();
NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
status = HidDeviceData.ReadStatus.Success;
}
catch { status = HidDeviceData.ReadStatus.ReadError; }
}
}
return(new HidDeviceData(buffer, status));
}
protected HidDeviceData ReadData(int timeout)
{
var buffer = new byte[] { };
var status = HidDeviceData.ReadStatus.NoDataRead;
IntPtr nonManagedBuffer;
if (_deviceCapabilities.InputReportByteLength > 0)
{
uint bytesRead;
buffer = CreateInputBuffer();
nonManagedBuffer = Marshal.AllocHGlobal(buffer.Length);
if (_deviceReadMode == DeviceMode.Overlapped)
{
var security = new NativeMethods.SECURITY_ATTRIBUTES();
var overlapped = new NativeOverlapped();
var overlapTimeout = timeout <= 0 ? NativeMethods.WAIT_INFINITE : timeout;
security.lpSecurityDescriptor = IntPtr.Zero;
security.bInheritHandle = true;
security.nLength = Marshal.SizeOf(security);
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(false), Convert.ToInt32(true), string.Empty);
try
{
var success = NativeMethods.ReadFile(ReadHandle, nonManagedBuffer, (uint)buffer.Length, out bytesRead, ref overlapped);
if (success)
{
status = HidDeviceData.ReadStatus.Success; // No check here to see if bytesRead > 0 . Perhaps not necessary?
}
else
{
var result = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout);
switch (result)
{
case NativeMethods.WAIT_OBJECT_0:
status = HidDeviceData.ReadStatus.Success;
NativeMethods.GetOverlappedResult(ReadHandle, ref overlapped, out bytesRead, false);
break;
case NativeMethods.WAIT_TIMEOUT:
status = HidDeviceData.ReadStatus.WaitTimedOut;
buffer = new byte[] { };
break;
case NativeMethods.WAIT_FAILED:
status = HidDeviceData.ReadStatus.WaitFail;
buffer = new byte[] { };
break;
default:
status = HidDeviceData.ReadStatus.NoDataRead;
buffer = new byte[] { };
break;
}
}
Marshal.Copy(nonManagedBuffer, buffer, 0, (int)bytesRead);
}
catch { status = HidDeviceData.ReadStatus.ReadError; }
finally {
CloseDeviceIO(overlapped.EventHandle);
Marshal.FreeHGlobal(nonManagedBuffer);
}
}
else
{
try
{
var overlapped = new NativeOverlapped();
NativeMethods.ReadFile(ReadHandle, nonManagedBuffer, (uint)buffer.Length, out bytesRead, ref overlapped);
status = HidDeviceData.ReadStatus.Success;
Marshal.Copy(nonManagedBuffer, buffer, 0, (int)bytesRead);
}
catch { status = HidDeviceData.ReadStatus.ReadError; }
finally { Marshal.FreeHGlobal(nonManagedBuffer); }
}
}
return(new HidDeviceData(buffer, status));
}
protected HidDeviceData ReadData(int timeout)
{
var buffer = new byte[] { };
var status = HidDeviceData.ReadStatus.NoDataRead;
if (_deviceCapabilities.InputReportByteLength > 0)
{
uint bytesRead = 0;
//buffer = CreateInputBuffer();
if (_deviceReadMode == DeviceMode.Overlapped)
{
//IntPtr unManagedBuffer = IntPtr.Zero;
//IntPtr unManagedOverlapped = IntPtr.Zero;
var unManagedBytesRead = IntPtr.Zero;
var security = new NativeMethods.SECURITY_ATTRIBUTES();
var overlapped = new NativeOverlapped();
var overlapTimeout = timeout <= 0 ? NativeMethods.WAIT_INFINITE : timeout;
security.lpSecurityDescriptor = IntPtr.Zero;
security.bInheritHandle = true;
security.nLength = Marshal.SizeOf(security);
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(true),
Convert.ToInt32(true), string.Empty);
try
{
var resultReadFile = NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
/*unManagedBuffer = Marshal.AllocHGlobal(buffer.Length);
* unManagedOverlapped = Marshal.AllocHGlobal(Marshal.SizeOf(overlapped));
* Marshal.StructureToPtr(overlapped, unManagedOverlapped, false);
*
* //var resultReadFile = NativeMethods.ReadFile(Handle, buffer, (uint) buffer.Length, out bytesRead, ref overlapped);
*
*
* var resultReadFile = NativeMethods.ReadFileUnsafe(Handle, unManagedBuffer,(uint) buffer.Length, unManagedBytesRead, (NativeOverlapped*)unManagedOverlapped);
*/
if (!resultReadFile && Marshal.GetLastWin32Error() == NativeMethods.ERROR_IO_PENDING)
{
Console.Out.WriteLine("Marshal.GetLastWin32Error() ---------------> " + Marshal.GetLastWin32Error());
var result = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout);
//Console.Out.WriteLine("******************BBBBB*********************");
//Console.Out.WriteLine("NativeMethods.WaitForSingleObject() ---------------> " + result);
switch (result)
{
case NativeMethods.WAIT_OBJECT_0:
status = HidDeviceData.ReadStatus.Success;
var stringBuilder = new StringBuilder();
//stringBuilder.AppendLine("Length = " + buffer.Length);
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.AppendLine("[" + i + "] = " + buffer[i] + " ");
}
Console.Out.WriteLine("Before GetOverlappedResult bytesRead : " + bytesRead +
"\n" + stringBuilder.ToString());
//var fresult = NativeMethods.GetOverlappedResultUnsafe(Handle, (NativeOverlapped*)unManagedOverlapped, out bytesRead, true);
var fresult = NativeMethods.GetOverlappedResult(Handle, ref overlapped, out bytesRead, true);
Console.Out.WriteLine("NativeMethods.GetOverlappedResult result is : " + fresult);
NativeMethods.ResetEvent(overlapped.EventHandle);
stringBuilder.Clear();
//stringBuilder.AppendLine("Length = " + buffer.Length);
//buffer = (byte[]) unManagedBuffer
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.AppendLine("[" + i + "] = " + buffer[i] + " ");
}
Console.Out.WriteLine("After GetOverlappedResult bytesRead : " + bytesRead +
"\n" + stringBuilder.ToString());
break;
case NativeMethods.WAIT_TIMEOUT:
status = HidDeviceData.ReadStatus.WaitTimedOut;
buffer = new byte[] {};
break;
case NativeMethods.WAIT_FAILED:
status = HidDeviceData.ReadStatus.WaitFail;
buffer = new byte[] {};
break;
default:
status = HidDeviceData.ReadStatus.NoDataRead;
buffer = new byte[] {};
break;
}
}
}
catch (Exception ex)
{
status = HidDeviceData.ReadStatus.ReadError;
//Console.Out.WriteLine("catch! ---------------> " + ex.Message + "\n" + ex.StackTrace);
}
finally
{
CloseDeviceIO(overlapped.EventHandle);
}
}
else
{
try
{
var overlapped = new NativeOverlapped();
NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
status = HidDeviceData.ReadStatus.Success;
}
catch
{
status = HidDeviceData.ReadStatus.ReadError;
}
}
}
return(new HidDeviceData(buffer, status));
}
