/// <summary>
/// Sends the control code to the device specified by handle.
/// </summary>
/// <typeparam name="TStructure"></typeparam>
/// <param name="handle"></param>
/// <param name="code"></param>
/// <param name="structure"></param>
/// <param name="bufferSize">Maximum size of returned buffer</param>
/// <returns></returns>
public static bool ControlWithInput <TStructure>(
SafeFileHandle handle, FsCtl code,
ref TStructure structure, int bufferSize, out byte[] buffer)
where TStructure : struct
{
uint datalen;
bool controlResult;
buffer = new byte[bufferSize];
var bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
var structureHandle = GCHandle.Alloc(structure, GCHandleType.Pinned);
var bufferPointer = bufferHandle.AddrOfPinnedObject();
var structurePointer = structureHandle.AddrOfPinnedObject();
try
{
controlResult =
DeviceIoControl(handle, (uint)code,
structurePointer, (uint)Marshal.SizeOf(structure),
bufferPointer, (uint)buffer.Length,
out datalen, IntPtr.Zero);
}
finally
{
structureHandle.Free();
bufferHandle.Free();
}
Array.Resize(ref buffer, (int)datalen);
return(controlResult);
}
/// <summary>
/// Sends the control code to the device specified by handle.
/// </summary>
/// <typeparam name="TStructure"></typeparam>
/// <param name="handle"></param>
/// <param name="code"></param>
/// <param name="structure"></param>
internal static bool ControlWithOutput <TStructure>(
SafeFileHandle handle, FsCtl code, ref TStructure structure)
where TStructure : struct
{
bool controlResult;
//get our object pointer
var structureHandle = GCHandle.Alloc(structure, GCHandleType.Pinned);
var structurePointer = structureHandle.AddrOfPinnedObject();
try
{
controlResult =
DeviceIoControl(handle, (uint)code,
IntPtr.Zero, 0, structurePointer,
(uint)Marshal.SizeOf(structure),
out _, IntPtr.Zero);
}
finally
{
// always release GH handle
structureHandle.Free();
}
if (controlResult)
{
structure = (TStructure)Marshal.PtrToStructure(structurePointer, typeof(TStructure));
}
return(controlResult);
}
public static extern bool DeviceIoControl(
SafeFileHandle hDevice,
FsCtl IoControlCode,
[In] ref MFT_ENUM_DATA InBuffer,
uint nInBufferSize,
[In] IntPtr OutBuffer,
uint nOutBufferSize,
ref uint pBytesReturned,
[In] IntPtr overlapped //[In] ref System.Threading.NativeOverlapped Overlapped
);
