diff options
Diffstat (limited to 'LibWinUsb/LibUsb/Internal/LibUsbDriverIO.cs')
| -rw-r--r-- | LibWinUsb/LibUsb/Internal/LibUsbDriverIO.cs | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/LibWinUsb/LibUsb/Internal/LibUsbDriverIO.cs b/LibWinUsb/LibUsb/Internal/LibUsbDriverIO.cs new file mode 100644 index 0000000..a87fd6a --- /dev/null +++ b/LibWinUsb/LibUsb/Internal/LibUsbDriverIO.cs @@ -0,0 +1,100 @@ +// Copyright © 2006-2010 Travis Robinson. All rights reserved.
+//
+// website: http://sourceforge.net/projects/libusbdotnet
+// e-mail: libusbdotnet@gmail.com
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. or
+// visit www.gnu.org.
+//
+//
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using LibUsbDotNet.Main;
+using Microsoft.Win32.SafeHandles;
+
+namespace LibUsbDotNet.Internal.LibUsb
+{
+ internal partial class LibUsbDriverIO
+ {
+ public const int ERROR_IO_PENDING = 997;
+ public const int FALSE = 0;
+ public const int FILE_FLAG_OVERLAPPED = 0x40000000;
+ internal const string LIBUSB_DEVICE_NAME = "\\\\.\\libusb0-";
+ public const int TRUE = 1;
+
+ private static byte[] _tempCfgBuf;
+
+ internal static byte[] GlobalTempCfgBuffer
+ {
+ get
+ {
+ if (ReferenceEquals(null, _tempCfgBuf))
+ _tempCfgBuf = new byte[4096];
+
+ return _tempCfgBuf;
+ }
+ }
+
+
+ internal static string GetDeviceNameString(int index) { return String.Format("{0}{1}", LIBUSB_DEVICE_NAME, index.ToString("0000")); }
+
+ internal static SafeFileHandle OpenDevice(String deviceFileName)
+ {
+ return Kernel32.CreateFile(deviceFileName,
+ NativeFileAccess.SPECIAL,
+ NativeFileShare.NONE,
+ IntPtr.Zero,
+ NativeFileMode.OPEN_EXISTING,
+ NativeFileFlag.FILE_FLAG_OVERLAPPED,
+ IntPtr.Zero);
+ }
+
+
+ internal static bool UsbIOSync(SafeHandle dev, int code, Object inBuffer, int inSize, IntPtr outBuffer, int outSize, out int ret)
+ {
+ SafeOverlapped deviceIoOverlapped = new SafeOverlapped();
+ ManualResetEvent hEvent = new ManualResetEvent(false);
+ deviceIoOverlapped.ClearAndSetEvent(hEvent.SafeWaitHandle.DangerousGetHandle());
+ ret = 0;
+
+ if (!Kernel32.DeviceIoControlAsObject(dev, code, inBuffer, inSize, outBuffer, outSize, ref ret, deviceIoOverlapped.GlobalOverlapped))
+ {
+ int iError = Marshal.GetLastWin32Error();
+ if (iError != ERROR_IO_PENDING)
+ {
+ // Don't log errors for these control codes.
+ do
+ {
+ if (code == LibUsbIoCtl.GET_REG_PROPERTY) break;
+ if (code == LibUsbIoCtl.GET_CUSTOM_REG_PROPERTY) break;
+ UsbError.Error(ErrorCode.Win32Error, iError, String.Format("DeviceIoControl code {0:X8} failed:{1}", code, Kernel32.FormatSystemMessage(iError)), typeof(LibUsbDriverIO));
+ } while (false);
+
+ hEvent.Close();
+ return false;
+ }
+ }
+ if (Kernel32.GetOverlappedResult(dev, deviceIoOverlapped.GlobalOverlapped, out ret, true))
+ {
+ hEvent.Close();
+ return true;
+ }
+ UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "GetOverlappedResult failed.\nIoCtlCode:" + code, typeof(LibUsbDriverIO));
+ hEvent.Close();
+ return false;
+ }
+ }
+}
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