NTSTATUS __fastcall IoGetOplockKeyContext(INT64 a1){
_BYTE *FileObjectExtension;
NTSTATUS v2;
FileObjectExtension = IopGetFileObjectExtension((_FILE_OBJECT *)a1, FoExtTypeOplockKey, 0i64);
if( FileObjectExtension && (FileObjectExtension[2] & 2) != 0 )
return(_DWORD)FileObjectExtension + 20;
return v2;
}