Function winapi::um::fileapi::GetDiskFreeSpaceExA

pub unsafe extern "system" fn GetDiskFreeSpaceExA(
    lpDirectoryName: LPCSTR, 
    lpFreeBytesAvailableToCaller: PULARGE_INTEGER, 
    lpTotalNumberOfBytes: PULARGE_INTEGER, 
    lpTotalNumberOfFreeBytes: PULARGE_INTEGER
) -> BOOL