Function libcryptsetup_sys::crypt_benchmark

pub unsafe extern "C" fn crypt_benchmark(
    cd: *mut crypt_device, 
    cipher: *const c_char, 
    cipher_mode: *const c_char, 
    volume_key_size: size_t, 
    iv_size: size_t, 
    buffer_size: size_t, 
    encryption_mbs: *mut c_double, 
    decryption_mbs: *mut c_double
) -> c_int