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.Init(hEvent.GetSafeWaitHandle().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); #if !NETSTANDARD1_5 && !NETSTANDARD1_6 hEvent.Close(); #else hEvent.Dispose(); #endif return false; } } if (Kernel32.GetOverlappedResult(dev, deviceIoOverlapped.GlobalOverlapped, out ret, true)) { #if !NETSTANDARD1_5 && !NETSTANDARD1_6 hEvent.Close(); #else hEvent.Dispose(); #endif return true; } UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "GetOverlappedResult failed.\nIoCtlCode:" + code, typeof(LibUsbDriverIO)); #if !NETSTANDARD1_5 && !NETSTANDARD1_6 hEvent.Close(); #else hEvent.Dispose(); #endif return false; }