internal static byte[] ControlWithInput <TStructure>(ChangeJournalSafeHandle handle, Win32ControlCode code, ref TStructure structure, int bufferlen) where TStructure : struct
{
uint datalen;
bool controlResult;
GCHandle structureHandle;
GCHandle bufferHandle;
IntPtr structurePointer;
IntPtr bufferPointer;
var buffer = new byte[bufferlen];
bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
structureHandle = GCHandle.Alloc(structure, GCHandleType.Pinned);
bufferPointer = bufferHandle.AddrOfPinnedObject();
structurePointer = structureHandle.AddrOfPinnedObject();
try
{
controlResult = Win32Methods.DeviceIoControl(handle, (uint)code, structurePointer, (uint)Marshal.SizeOf(structure), bufferPointer, (uint)buffer.Length, out datalen, IntPtr.Zero);
}
finally
{
structureHandle.Free();
bufferHandle.Free();
}
if (!controlResult)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
if (datalen < bufferlen && datalen != 0)
{
var tempBuffer = new byte[datalen];
Array.Copy(buffer, 0, tempBuffer, 0, datalen);
buffer = tempBuffer;
}
return(buffer);
}
internal static void ControlWithOutput <TStructure>(ChangeJournalSafeHandle handle, Win32ControlCode code, ref TStructure structure) where TStructure : struct
{
bool controlResult;
GCHandle structureHandle;
IntPtr structurePointer;
// get our object pointer
structureHandle = GCHandle.Alloc(structure, GCHandleType.Pinned);
structurePointer = structureHandle.AddrOfPinnedObject();
try
{
controlResult = Win32Methods.DeviceIoControl(handle, (uint)code, IntPtr.Zero, 0, structurePointer, (uint)Marshal.SizeOf(structure), out _, IntPtr.Zero);
}
finally
{
// always release GH handle
structureHandle.Free();
}
if (!controlResult)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
structure = Marshal.PtrToStructure <TStructure>(structurePointer);
}
