string := @use("rel:string.hb");

receive_message := fn(buffer_id: int, memory_map_location: ^u8, length: int): ^u8 {
    return @eca(void, 4, buffer_id, memory_map_location, length);
}

send_message := fn(buffer_id: int): void {
    message := "Hello there\0";
    message_length := string.length(message);
	
    @eca(i32, 3, buffer_id, message, message_length);
    return;
}

create := fn(): int {
    msg := "\{01}Number\0";
    msg_length := string.length(msg);
    *msg = 0;
    return @eca(int, 1, 0, msg, msg_length);
}