private DeviceAsyncResult <T> AsyncControl <T>(DeviceControlCode deviceControlCode,
Object inBuffer, T outBuffer, AsyncCallback asyncCallback, Object state)
{
SafePinnedObject inDeviceBuffer = SafePinnedObject.FromObject(inBuffer);
SafePinnedObject outDeviceBuffer = SafePinnedObject.FromObject(outBuffer);
DeviceAsyncResult <T> asyncResult = new DeviceAsyncResult <T>(inDeviceBuffer, outDeviceBuffer, asyncCallback, state);
unsafe {
Int32 bytesReturned;
NativeControl(deviceControlCode, inDeviceBuffer, outDeviceBuffer,
out bytesReturned, asyncResult.GetNativeOverlapped());
}
return(asyncResult);
}
private Object SyncControl(DeviceControlCode deviceControlCode,
Object inBuffer, Object outBuffer, out Int32 bytesReturned)
{
using (SafePinnedObject inDeviceBuffer = SafePinnedObject.FromObject(inBuffer))
using (SafePinnedObject outDeviceBuffer = SafePinnedObject.FromObject(outBuffer)) {
unsafe {
NativeControl(deviceControlCode, inDeviceBuffer, outDeviceBuffer,
out bytesReturned, null);
}
}
// When passed, the argument for outBuffer got boxed so we return a reference
// to the object that contains the data returned from DeviceIoControl.
return(outBuffer);
}