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Реализовать workspace со следующими package-ами: Реализовать workspace со следующими package-ами:
- [ ] Библиотека умной розетки с Си ABI. - [x] Библиотека умной розетки с Си ABI.
- [ ] Приложение, использующее библиотеку умной розетки, линкуя её статически. - [x] Приложение, использующее библиотеку умной розетки, линкуя её статически.
- [ ] Приложение, использующее библиотеку умной розетки, линкуя её динамически в runtime. - [x] Приложение, использующее библиотеку умной розетки, линкуя её динамически в runtime.
Библиотека умной розетки с Си ABI: Библиотека умной розетки с Си ABI:
- [ ] Функционал не изменяется: включение/выключение + запрос мощности. - [x] Функционал не изменяется: включение/выключение + запрос мощности.
- [ ] При сборке создаёт три артефакта: - [x] При сборке создаёт три артефакта:
1. Rust библиотеку 1. Rust библиотеку
2. Статическую библиотеку с Си ABI. 2. Статическую библиотеку с Си ABI.
3. Динамическую библиотеку с Си ABI 3. Динамическую библиотеку с Си ABI
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- Workspace успешно собирается. - Workspace успешно собирается.
- Приложения-примеры успешно выполняются. - Приложения-примеры успешно выполняются.
- Команды cargo clippy, и cargo fmt --check не выводят ошибок и предупреждений. - Команды cargo clippy, и cargo fmt --check не выводят ошибок и предупреждений.
### Демо
1. Собрать библиотеку:
cargo build -p power_socket_lib
2. Статическая линковка:
cargo run -p use_static
3. Динамическая линковка:
cargo run -p use_dynamic

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@@ -1,8 +0,0 @@
[package]
edition = "2024"
name = "smart-house"
version = "0.0.0"
[dependencies]
tokio = { version = "1.49.0", features = ["rt", "net", "io-util", "time"] }
rand = { version = "0.10.0", features = ["std"] }

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@@ -1,11 +0,0 @@
use smart_house::{HouseBuilder, PowerSocket, PrintStatus, Thermometer};
fn main() {
let house = HouseBuilder::new()
.add_room("Main")
.add_device("PSockA", PowerSocket::stub(12.0, false))
.add_room("Hall")
.add_device("ThermA", Thermometer::stub(18.5))
.build();
house.print_status();
}

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@@ -1,32 +0,0 @@
//! Пример работы умного дома с имитаторами
use smart_house::{Device, House, PowerSocket, PrintStatus, Room, Thermometer, room};
fn main() -> Result<(), Box<dyn std::error::Error>> {
let mut house = create_house_demo()?;
let dev = house.get_room_mut("Main").unwrap().get_device_mut("PSocA").unwrap();
if let Device::PowerSocket(psoc) = dev {
psoc.set_on(!psoc.is_on().unwrap()).unwrap();
}
house.print_status();
Ok(())
}
fn create_house_demo() -> Result<House, Box<dyn std::error::Error>> {
println!("# Create new smart house");
let house = House::new(
[(
"Main".to_string(),
room!(
"PSocA" => PowerSocket::connect("127.0.0.1:10001")?,
"ThermA" => Thermometer::connect("127.0.0.1:10002")?,
),
)]
.into_iter()
.collect(),
);
Ok(house)
}

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@@ -1,19 +0,0 @@
//! Пример подключения нескольких клиентов к розетке. Изменение состояния любым из клиентов отражается на всех.
use smart_house::PowerSocket;
use std::time::Duration;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let power_socket0 = PowerSocket::connect("127.0.0.1:10001")?;
let mut power_socket = PowerSocket::connect("127.0.0.1:10001")?;
println!("{}", power_socket0.display());
println!("{}", power_socket.display());
std::thread::sleep(Duration::from_secs(2));
power_socket.set_on(!power_socket.is_on().unwrap()).unwrap();
println!("{}", power_socket0.display());
println!("{}", power_socket.display());
Ok(())
}

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@@ -1,88 +0,0 @@
//! Сервер-имитатор умной розетки
use std::net::SocketAddr;
use std::sync::{Arc, RwLock};
use std::time::Duration;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
fn parse_args() -> Result<SocketAddr, Box<dyn std::error::Error>> {
let mut args = std::env::args();
args.next();
Ok(args.next().ok_or(std::io::Error::other("no server address parameter specified"))?.parse()?)
}
struct RealPowerSocket {
power_rate: f32,
on: bool,
}
const CMD_GET_ON: u8 = 1;
const CMD_TURN_ON: u8 = 2;
const CMD_TURN_OFF: u8 = 3;
const CMD_GET_POWER: u8 = 4;
const TIMEOUT: Duration = Duration::from_secs(5);
async fn handle_connection(mut socket: tokio::net::TcpStream, real_power_socket: Arc<RwLock<RealPowerSocket>>) -> Result<(), std::io::Error> {
let mut buf = [0u8; 1];
loop {
let read = tokio::time::timeout(TIMEOUT, socket.read(&mut buf)).await??;
if read == 0 {
println!("connection closed");
return Ok(());
}
match buf {
[CMD_GET_ON] => {
println!("handling CMD_GET_ON");
{
let power_socket = real_power_socket.try_read().map_err(|_| std::io::Error::other("read lock failed"))?;
buf = if power_socket.on { [1u8; 1] } else { [0u8; 1] };
}
let _ = tokio::time::timeout(TIMEOUT, socket.write(&buf)).await?;
}
[CMD_TURN_ON] => {
println!("handling CMD_TURN_ON");
{
let mut power_socket = real_power_socket.try_write().map_err(|_| std::io::Error::other("write lock failed"))?;
power_socket.on = true;
}
let _ = tokio::time::timeout(TIMEOUT, socket.write(&buf)).await?;
}
[CMD_TURN_OFF] => {
println!("handling CMD_TURN_OFF");
{
let mut power_socket = real_power_socket.try_write().map_err(|_| std::io::Error::other("write lock failed"))?;
power_socket.on = false;
}
let _ = tokio::time::timeout(TIMEOUT, socket.write(&buf)).await?;
}
[CMD_GET_POWER] => {
println!("handling CMD_GET_POWER");
let data_buf: [u8; 4];
{
let power_socket = real_power_socket.try_read().map_err(|_| std::io::Error::other("read lock failed"))?;
data_buf = power_socket.power_rate.to_le_bytes();
}
let _ = tokio::time::timeout(TIMEOUT, socket.write(&data_buf)).await?;
}
_ => {
println!("unknown command {} - ignore it", buf[0]);
}
}
}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let real_power_socket = Arc::new(RwLock::new(RealPowerSocket { power_rate: 12.0, on: false }));
let rt = tokio::runtime::Builder::new_current_thread().enable_all().build()?;
rt.block_on(async {
let listener = tokio::net::TcpListener::bind(parse_args()?).await?;
loop {
let (socket, _) = listener.accept().await?;
println!("new connection");
let real_power_socket = real_power_socket.clone();
tokio::spawn(async move { handle_connection(socket, real_power_socket).await });
}
})
}

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@@ -1,17 +0,0 @@
use smart_house::{HouseBuilder, PowerSocket, Reporter, Thermometer};
fn main() {
let house = HouseBuilder::new()
.add_room("Main")
.add_device("PSockB", PowerSocket::stub(12.0, false))
.add_room("Hall")
.add_device("ThermB", Thermometer::stub(18.5))
.build();
Reporter::new()
.add_reportable(house.get_room("Main").unwrap())
.add_reportable(house.get_device("Main", "PSockB").unwrap())
.add_reportable(house.get_room("Hall").unwrap())
.add_reportable(house.get_device("Hall", "ThermB").unwrap())
.report();
}

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@@ -1,147 +0,0 @@
//! Старый пример работы умного дома на заглушках
use smart_house::{Device, House, PowerSocket, PrintStatus, Room, Thermometer, room};
fn main() {
let mut house = create_house_demo();
switch_off_power_socket_in_hall_demo(&mut house);
add_new_room_in_house_demo(&mut house);
add_power_socket_to_closet_room_demo(&mut house);
remove_thermometer_from_closet_room_demo(&mut house);
remove_closet_room_demo(&mut house);
searching_devices_in_house_demo(&house);
universal_printing_function_demo(&house);
}
fn create_house_demo() -> House {
println!("# Create new smart house");
let house = House::new(
[
(
"Hall".to_string(),
room!(
"PSocA" => PowerSocket::stub(9.5, true),
"ThermA" => Thermometer::stub(20.1),
),
),
(
"Main".to_string(),
room!(
"PSocB" => PowerSocket::stub(11.2, true),
"ThermB" => Thermometer::stub(24.5),
"PSocC" => PowerSocket::stub(10.4, true),
),
),
(
"Bedroom".to_string(),
room!(
"ThermC" => Thermometer::stub(19.3),
"PSocD" => PowerSocket::stub(12.1, true),
),
),
]
.into_iter()
.collect(),
);
house.print_status();
house
}
fn switch_off_power_socket_in_hall_demo(house: &mut House) {
print!("# Switching off a power socket in Hall... ");
let Device::PowerSocket(power_socket) = house.get_room_mut("Hall").unwrap().get_device_mut("PSocA").unwrap() else {
println!("FAILED!");
return;
};
power_socket.set_on(false).unwrap();
println!("SUCCESS");
house.print_status();
}
fn add_new_room_in_house_demo(house: &mut House) {
println!("# Add new room into house");
house.insert_room(
"Closet",
room!(
"ThermD" => Thermometer::stub(9.5)
),
);
house.print_status();
}
fn add_power_socket_to_closet_room_demo(house: &mut House) {
println!("# Add power socket to 'Closet' room");
house
.get_room_mut("Closet")
.unwrap()
.insert_device("PSocE", PowerSocket::stub(8.0, true).into());
house.print_status();
}
fn remove_thermometer_from_closet_room_demo(house: &mut House) {
print!("# Removing thermometer from 'Closet' room... ");
let Some(_) = house.get_room_mut("Closet").unwrap().remove_device("ThermD") else {
println!("FAILED!");
return;
};
println!("SUCCESS");
house.print_status();
}
fn remove_closet_room_demo(house: &mut House) {
print!("# Removing 'Closet' room... ");
let Some(_) = house.remove_room("Closet") else {
println!("FAILED!");
return;
};
println!("SUCCESS");
house.print_status();
}
fn searching_devices_in_house_demo(house: &House) {
println!("# Searching dummy device in empty room");
find_device_handling_errors_demo(house, "empty", "dummy");
println!("# Searching dummy device in Bedroom");
find_device_handling_errors_demo(house, "Bedroom", "dummy");
println!("# Searching ThermA device in Hall room");
find_device_handling_errors_demo(house, "Hall", "ThermA");
println!();
}
fn find_device_handling_errors_demo(house: &House, room: &str, device: &str) {
match house.get_device(room, device) {
Err(error) => {
println!("FAIL. Error: {:?}", error);
}
Ok(device) => {
print!("SUCCESS. Device found: ");
device.print_status();
}
}
}
fn universal_printing_function_demo(house: &House) {
println!("# Print house using universal function");
print_status(house);
println!("# Print Main room using universal function");
print_status(house.get_room("Main").unwrap());
println!();
println!("# Print PSocC device from Main room using universal function");
print_status(house.get_device("Main", "PSocC").unwrap());
}
fn print_status(printable: &impl PrintStatus) {
printable.print_status();
}

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@@ -1,22 +0,0 @@
use smart_house::{Device, PowerSocket, Room, Subscriber};
fn main() {
let mut room = Room::default();
room.subscribe(MySubscriber::default());
room.subscribe(|dev: &Device| {
println!("device added: {}", dev.display());
});
room.insert_device("", PowerSocket::stub(12.0, false).into());
}
#[derive(Default)]
struct MySubscriber {}
impl Subscriber for MySubscriber {
fn on_event(&mut self, dev: &Device) {
println!("DEVICE ADDED: {}", dev.display());
}
}

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@@ -1,53 +0,0 @@
//! Имитатор термометра
use rand::prelude::*;
use std::io::Read;
use std::net::{IpAddr, SocketAddr};
use std::str::FromStr;
use std::sync::Arc;
use std::time::Duration;
struct Params {
addr: SocketAddr,
interval: Duration,
}
const CONFIG_FILE: &str = "thermometer_mock.cfg";
fn read_parameters_from_file() -> Result<Params, std::io::Error> {
let mut file = std::fs::File::open(CONFIG_FILE)?;
let mut content = String::new();
file.read_to_string(&mut content)?;
let lines = content.split("\n").collect::<Vec<&str>>();
let addr = lines
.first()
.map(|v| SocketAddr::from_str(v))
.ok_or(std::io::Error::other("no address found in config file"))?
.map_err(std::io::Error::other)?;
let interval = lines
.get(1)
.map(|v| v.parse::<u64>())
.ok_or(std::io::Error::other("no interval found in config file"))?
.map(Duration::from_millis)
.map_err(std::io::Error::other)?;
Ok(Params { addr, interval })
}
fn generate_temperature() -> f32 {
rand::rng().random_range(18.0..23.0)
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let params = read_parameters_from_file()?;
let rt = tokio::runtime::Builder::new_current_thread().enable_all().build()?;
rt.block_on(async move {
let socket = Arc::new(tokio::net::UdpSocket::bind(SocketAddr::new(IpAddr::from([127, 0, 0, 1]), 10003)).await?);
let mut interval = tokio::time::interval(params.interval);
loop {
interval.tick().await;
let new_temperature = generate_temperature();
let data = new_temperature.to_le_bytes();
socket.send_to(&data, &params.addr).await?;
}
})
}

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@@ -1,53 +0,0 @@
use crate::{Device, House, Room};
use std::collections::HashMap;
pub struct HouseBuilder {
rooms: HashMap<String, Room>,
}
impl HouseBuilder {
pub fn new() -> Self {
Self { rooms: HashMap::new() }
}
pub fn add_room(self, name: &str) -> RoomBuilder {
RoomBuilder {
parent: self,
name: name.to_string(),
devices: HashMap::new(),
}
}
pub fn build(self) -> House {
House::new(self.rooms)
}
}
impl Default for HouseBuilder {
fn default() -> Self {
Self::new()
}
}
pub struct RoomBuilder {
parent: HouseBuilder,
name: String,
devices: HashMap<String, Device>,
}
impl RoomBuilder {
pub fn add_device(mut self, name: &str, device: impl Into<Device>) -> Self {
self.devices.insert(name.to_string(), device.into());
self
}
pub fn add_room(mut self, name: &str) -> RoomBuilder {
self.parent.rooms.insert(self.name, Room::new(self.devices));
self.parent.add_room(name)
}
pub fn build(mut self) -> House {
self.parent.rooms.insert(self.name, Room::new(self.devices));
self.parent.build()
}
}

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@@ -1,72 +0,0 @@
use crate::PrintStatus;
use std::fmt::Display;
use std::io::Write;
#[derive(Debug)]
pub enum Device {
Thermometer(super::Thermometer),
PowerSocket(super::PowerSocket),
}
impl Device {
pub fn display(&self) -> impl Display {
match self {
Device::Thermometer(thermometer) => {
format!("DEV:{}", thermometer.display())
}
Device::PowerSocket(power_socket) => {
format!("DEV:{}", power_socket.display())
}
}
}
}
impl From<super::Thermometer> for Device {
fn from(value: super::Thermometer) -> Self {
Device::Thermometer(value)
}
}
impl From<super::PowerSocket> for Device {
fn from(value: super::PowerSocket) -> Self {
Device::PowerSocket(value)
}
}
impl PrintStatus for Device {
fn print_status_into(&self, out: &mut dyn Write) -> Result<(), std::io::Error> {
out.write_fmt(format_args!("{}", self.display()))
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{PowerSocket, Thermometer};
#[test]
fn smoke_test() {
let dev_thermometer = Device::Thermometer(Thermometer::stub(20.1));
let dev_power_socket = Device::PowerSocket(PowerSocket::stub(11.2, false));
dev_thermometer.print_status();
dev_power_socket.print_status();
let Device::Thermometer(thermometer) = dev_thermometer else { unreachable!() };
let Device::PowerSocket(power_socket) = dev_power_socket else {
unreachable!()
};
assert_eq!(format!("{}", thermometer.display()), "Thermometer[ 20.1 ]");
assert_eq!(format!("{}", power_socket.display()), "PowerSocket[ OFF : 0.0 ]");
}
#[test]
fn display_test() {
let dev_thermometer = Device::Thermometer(Thermometer::stub(20.1));
let dev_power_socket = Device::PowerSocket(PowerSocket::stub(11.2, false));
assert_eq!(format!("{}", dev_thermometer.display()), "DEV:Thermometer[ 20.1 ]");
assert_eq!(format!("{}", dev_power_socket.display()), "DEV:PowerSocket[ OFF : 0.0 ]");
}
}

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@@ -1,23 +0,0 @@
use std::fmt::{Display, Formatter};
#[derive(Debug)]
pub struct Error {
message: String,
}
impl Error {
pub fn new(message: impl AsRef<str>) -> Self {
Self {
message: message.as_ref().to_string(),
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.write_fmt(format_args!("{}", self.message))?;
Ok(())
}
}
impl std::error::Error for Error {}

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@@ -1,154 +0,0 @@
use crate::{Device, Error, PrintStatus, Room};
use std::collections::HashMap;
use std::io::Write;
#[derive(Debug)]
pub struct House {
rooms: HashMap<String, Room>,
}
impl House {
pub fn new(rooms: HashMap<String, Room>) -> Self {
Self { rooms }
}
pub fn get_room(&self, key: &str) -> Option<&Room> {
self.rooms.get(key)
}
pub fn get_room_mut(&mut self, key: &str) -> Option<&mut Room> {
self.rooms.get_mut(key)
}
pub fn insert_room(&mut self, name: &str, room: Room) -> Option<Room> {
self.rooms.insert(name.to_string(), room)
}
pub fn remove_room(&mut self, key: &str) -> Option<Room> {
self.rooms.remove(key)
}
pub fn get_device(&self, room_name: &str, device_name: &str) -> Result<&Device, Error> {
let Some(room) = self.get_room(room_name) else {
return Err(Error::new(format!("no room named '{}' found", room_name)));
};
let Some(device) = room.get_device(device_name) else {
return Err(Error::new(format!("no device named '{}' found in room '{}'", device_name, room_name)));
};
Ok(device)
}
}
impl PrintStatus for House {
fn print_status_into(&self, out: &mut dyn Write) -> Result<(), std::io::Error> {
for (room_name, room) in self.rooms.iter() {
out.write_fmt(format_args!("{}:\n", room_name))?;
out.write_fmt(format_args!("{}\n", "-".repeat(32)))?;
room.print_status_into(out)?;
out.write_fmt(format_args!("\n"))?;
println!();
}
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{Device, PowerSocket, Thermometer};
fn create_test_house() -> House {
House::new(
[
(
"main".to_string(),
Room::new(
[
("ThermA".to_string(), Thermometer::stub(20.0).into()),
("PSocA".to_string(), PowerSocket::stub(12.34, false).into()),
("PSocB".to_string(), PowerSocket::stub(10.01, true).into()),
]
.into_iter()
.collect(),
),
),
(
"bedroom".to_string(),
Room::new(
[
("PSocC".to_string(), PowerSocket::stub(11.11, true).into()),
("ThermB".to_string(), Thermometer::stub(17.99).into()),
]
.into_iter()
.collect(),
),
),
]
.into_iter()
.collect(),
)
}
#[test]
fn smoke_test() {
let mut house = create_test_house();
assert_eq!(house.rooms.len(), 2);
house.print_status();
assert_eq!(
format!("{}", house.get_room("main").unwrap().get_device("ThermA").unwrap().display()),
"DEV:Thermometer[ 20.0 ]"
);
assert_eq!(
format!("{}", house.get_room("main").unwrap().get_device("PSocA").unwrap().display()),
"DEV:PowerSocket[ OFF : 0.0 ]"
);
assert_eq!(
format!("{}", house.get_room("bedroom").unwrap().get_device("PSocC").unwrap().display()),
"DEV:PowerSocket[ ON : 11.1 ]"
);
let Device::PowerSocket(powers_socket) = house.get_room_mut("main").unwrap().get_device_mut("PSocA").unwrap() else {
unreachable!()
};
powers_socket.set_on(true).unwrap();
assert_eq!(
format!("{}", house.get_room("main").unwrap().get_device("PSocA").unwrap().display()),
"DEV:PowerSocket[ ON : 12.3 ]"
);
}
#[test]
fn check_out_of_bounds() {
let house = create_test_house();
assert!(house.get_room("absent").is_none());
}
#[test]
fn test_add_remove() {
let mut house = create_test_house();
let room = Room::new(HashMap::new());
let result = house.insert_room("empty", room);
assert!(result.is_none());
assert_eq!(house.rooms.len(), 3);
let Some(result) = house.remove_room("bedroom") else { unreachable!() };
assert_eq!(result.get_device("ThermB").unwrap().display().to_string(), "DEV:Thermometer[ 18.0 ]");
}
#[test]
fn test_get_device() {
let house = create_test_house();
let result = house.get_device("empty", "dummy");
assert_eq!(result.unwrap_err().to_string(), "no room named 'empty' found");
let result = house.get_device("main", "dummy");
assert_eq!(result.unwrap_err().to_string(), "no device named 'dummy' found in room 'main'");
let result = house.get_device("main", "ThermA");
assert_eq!(result.unwrap().display().to_string(), "DEV:Thermometer[ 20.0 ]");
}
}

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@@ -1,22 +0,0 @@
mod device;
mod error;
mod house;
mod power_socket;
#[macro_use]
mod room;
mod builders;
mod print_status;
mod reporter;
mod subscriber;
mod thermometer;
pub use builders::{HouseBuilder, RoomBuilder};
pub use device::Device;
pub use error::Error;
pub use house::House;
pub use power_socket::PowerSocket;
pub use print_status::PrintStatus;
pub use reporter::Reporter;
pub use room::Room;
pub use subscriber::Subscriber;
pub use thermometer::Thermometer;

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@@ -1 +0,0 @@
fn main() {}

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@@ -1,177 +0,0 @@
use std::cell::RefCell;
use std::fmt::{Debug, Display};
use std::io::{Read, Write};
use std::net::{SocketAddr, TcpStream};
use std::time::Duration;
#[derive(Debug)]
pub struct PowerSocket {
handle: Box<dyn PowerSocketHandle>,
}
impl PowerSocket {
pub fn stub(power_rate: f32, on: bool) -> Self {
Self {
handle: Box::new(PowerSocketStub::new(power_rate, on)),
}
}
pub fn connect(addr: &str) -> Result<Self, std::io::Error> {
let handle = PowerSocketClient::new(addr)?;
Ok(Self { handle: Box::new(handle) })
}
pub fn is_on(&self) -> Result<bool, std::io::Error> {
self.handle.is_on()
}
pub fn set_on(&mut self, on: bool) -> Result<(), std::io::Error> {
self.handle.set_on(on)
}
pub fn get_power(&self) -> Result<f32, std::io::Error> {
self.handle.get_power()
}
pub fn display(&self) -> impl Display {
const ERR: &str = "PowerSocket[ ERR ]";
let power = match self.get_power() {
Ok(power) => power,
Err(e) => {
eprintln!("error on get power: {:?}", e);
return ERR.to_string();
}
};
let on = match self.is_on() {
Ok(state) => state,
Err(e) => {
eprintln!("error on get state: {:?}", e);
return ERR.to_string();
}
};
let state = if on { "ON" } else { "OFF" };
format!("PowerSocket[ {} : {:02.1} ]", state, power)
}
}
trait PowerSocketHandle: Debug {
fn is_on(&self) -> Result<bool, std::io::Error>;
fn set_on(&mut self, on: bool) -> Result<(), std::io::Error>;
fn get_power(&self) -> Result<f32, std::io::Error>;
}
#[derive(Debug)]
struct PowerSocketStub {
power_rate: f32,
on: bool,
}
impl PowerSocketStub {
pub fn new(power_rate: f32, on: bool) -> Self {
Self { power_rate, on }
}
}
impl PowerSocketHandle for PowerSocketStub {
fn is_on(&self) -> Result<bool, std::io::Error> {
Ok(self.on)
}
fn set_on(&mut self, on: bool) -> Result<(), std::io::Error> {
self.on = on;
Ok(())
}
fn get_power(&self) -> Result<f32, std::io::Error> {
Ok(if self.on { self.power_rate } else { 0.0 })
}
}
const TIMEOUT: Duration = Duration::from_secs(5);
#[derive(Debug)]
struct PowerSocketClient {
stream: RefCell<TcpStream>,
}
impl PowerSocketClient {
fn new(addr: &str) -> Result<Self, std::io::Error> {
let addr: SocketAddr = addr.parse().map_err(std::io::Error::other)?;
let stream = TcpStream::connect_timeout(&addr, TIMEOUT)?;
stream.set_write_timeout(Some(TIMEOUT))?;
stream.set_read_timeout(Some(TIMEOUT))?;
Ok(Self { stream: RefCell::new(stream) })
}
}
const CMD_GET_ON: u8 = 1;
const CMD_TURN_ON: u8 = 2;
const CMD_TURN_OFF: u8 = 3;
const CMD_GET_POWER: u8 = 4;
impl PowerSocketHandle for PowerSocketClient {
fn is_on(&self) -> Result<bool, std::io::Error> {
let mut buf = [CMD_GET_ON; 1];
self.stream
.borrow_mut()
.write_all(&buf)
.map_err(|e| std::io::Error::other(format!("CMD_GET_ON request error: {:?}", e)))?;
self.stream
.borrow_mut()
.read_exact(&mut buf)
.map_err(|e| std::io::Error::other(format!("CMD_GET_ON response error: {:?}", e)))?;
Ok(!matches!(buf, [0]))
}
fn set_on(&mut self, on: bool) -> Result<(), std::io::Error> {
let cmd = if on { CMD_TURN_ON } else { CMD_TURN_OFF };
let mut buf = [cmd; 1];
self.stream
.borrow_mut()
.write_all(&buf)
.map_err(|e| std::io::Error::other(format!("change state request error: {:?}", e)))?;
self.stream
.borrow_mut()
.read_exact(&mut buf)
.map_err(|e| std::io::Error::other(format!("change state response error: {:?}", e)))?;
Ok(())
}
fn get_power(&self) -> Result<f32, std::io::Error> {
let mut buf = [CMD_GET_POWER; 4];
self.stream
.borrow_mut()
.write_all(&buf[0..1])
.map_err(|e| std::io::Error::other(format!("CMD_GET_POWER request error: {:?}", e)))?;
self.stream
.borrow_mut()
.read_exact(&mut buf)
.map_err(|e| std::io::Error::other(format!("CMD_GET_POWER response error: {:?}", e)))?;
Ok(f32::from_le_bytes(buf))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn smoke_test() {
let mut power_socket = PowerSocket::stub(12.4, false);
assert!(!power_socket.is_on().unwrap());
assert_eq!(power_socket.get_power().unwrap(), 0.0);
power_socket.set_on(true).unwrap();
assert!(power_socket.is_on().unwrap());
assert_eq!(power_socket.get_power().unwrap(), 12.4);
}
#[test]
fn display_test() {
assert_eq!(format!("{}", PowerSocket::stub(11.549, false).display()), "PowerSocket[ OFF : 0.0 ]");
assert_eq!(format!("{}", PowerSocket::stub(11.549, true).display()), "PowerSocket[ ON : 11.5 ]");
assert_eq!(format!("{}", PowerSocket::stub(11.550, true).display()), "PowerSocket[ ON : 11.6 ]");
}
}

View File

@@ -1,9 +0,0 @@
pub trait PrintStatus {
fn print_status_into(&self, out: &mut dyn std::io::Write) -> Result<(), std::io::Error>;
fn print_status(&self) {
if let Err(e) = self.print_status_into(&mut std::io::stdout()) {
eprintln!("Unexpected print error: {:?}", e);
}
}
}

View File

@@ -1,30 +0,0 @@
use crate::PrintStatus;
pub struct Reporter<'a> {
reportables: Vec<&'a dyn PrintStatus>,
}
impl<'a> Reporter<'a> {
pub fn new() -> Self {
Self { reportables: Vec::new() }
}
pub fn add_reportable<T: PrintStatus>(mut self, reportable: &'a T) -> Self {
self.reportables.push(reportable);
self
}
pub fn report(&self) {
println!("{}", "=".repeat(16));
for reportable in &self.reportables {
reportable.print_status();
println!("\n{}", "=".repeat(16));
}
}
}
impl<'a> Default for Reporter<'a> {
fn default() -> Self {
Self::new()
}
}

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@@ -1,126 +0,0 @@
use crate::{Device, PrintStatus, Subscriber};
use std::collections::HashMap;
use std::fmt::{Debug, Formatter};
use std::io::Write;
pub struct Room {
devices: HashMap<String, Device>,
subscribers: Vec<Box<dyn Subscriber>>,
}
impl Room {
pub fn new(devices: HashMap<String, Device>) -> Self {
Self {
devices,
subscribers: Vec::new(),
}
}
pub fn get_device(&self, name: &str) -> Option<&Device> {
self.devices.get(name)
}
pub fn get_device_mut(&mut self, name: &str) -> Option<&mut Device> {
self.devices.get_mut(name)
}
pub fn insert_device(&mut self, name: &str, device: Device) -> Option<Device> {
for subscriber in &mut self.subscribers {
subscriber.on_event(&device);
}
self.devices.insert(name.to_string(), device)
}
pub fn remove_device(&mut self, name: &str) -> Option<Device> {
self.devices.remove(name)
}
pub fn subscribe(&mut self, subscriber: impl Subscriber + 'static) {
self.subscribers.push(Box::new(subscriber));
}
}
impl PrintStatus for Room {
fn print_status_into(&self, out: &mut dyn Write) -> Result<(), std::io::Error> {
for (name, device) in self.devices.iter() {
out.write_fmt(format_args!("{} => ", name))?;
device.print_status_into(out)?;
}
Ok(())
}
}
impl Debug for Room {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Room")
.field("devices", &self.devices)
.field("subscribers.len()", &self.subscribers.len())
.finish()
}
}
impl Default for Room {
fn default() -> Self {
Room::new(HashMap::new())
}
}
#[macro_export]
macro_rules! room {
($($key:expr => $dev:expr),* $(,)?) => {
Room::new([$(
($key.to_string(), $dev.into()),
)*].into_iter().collect())
};
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{PowerSocket, Thermometer};
fn create_test_room() -> Room {
room!(
"PSoc" => PowerSocket::stub(12.34, false),
"Therm" => Thermometer::stub(21.56),
)
}
#[test]
fn smoke_test() {
let mut room = create_test_room();
assert_eq!(room.devices.len(), 2);
room.print_status();
assert_eq!(format!("{}", room.get_device("PSoc").unwrap().display()), "DEV:PowerSocket[ OFF : 0.0 ]");
assert_eq!(format!("{}", room.get_device("Therm").unwrap().display()), "DEV:Thermometer[ 21.6 ]");
let Device::PowerSocket(power_socket) = room.get_device_mut("PSoc").unwrap() else {
unreachable!()
};
power_socket.set_on(true).unwrap();
assert_eq!(format!("{}", room.get_device("PSoc").unwrap().display()), "DEV:PowerSocket[ ON : 12.3 ]");
assert_eq!(format!("{}", room.get_device("Therm").unwrap().display()), "DEV:Thermometer[ 21.6 ]");
}
#[test]
fn check_out_of_bounds() {
let room = create_test_room();
assert!(room.get_device("dummy").is_none());
}
#[test]
fn test_add_remove() {
let mut room = create_test_room();
let result = room.insert_device("NewTerm", Thermometer::stub(20.0).into());
assert!(result.is_none());
assert_eq!(room.devices.len(), 3);
let Some(Device::Thermometer(removed)) = room.remove_device("Therm") else {
unreachable!()
};
assert_eq!(removed.get_temperature().unwrap(), 21.56);
assert_eq!(room.devices.len(), 2);
}
}

View File

@@ -1,14 +0,0 @@
use crate::Device;
pub trait Subscriber {
fn on_event(&mut self, device: &Device);
}
impl<F> Subscriber for F
where
F: Fn(&Device),
{
fn on_event(&mut self, value: &Device) {
self(value)
}
}

View File

@@ -1,121 +0,0 @@
use std::fmt::{Debug, Display};
use std::net::UdpSocket;
use std::sync::Arc;
use std::sync::atomic::{AtomicU32, Ordering};
use std::time::Duration;
#[derive(Debug)]
pub struct Thermometer {
handle: Box<dyn ThermometerHandle>,
}
impl Thermometer {
pub fn stub(temperature: f32) -> Self {
Self {
handle: Box::new(ThermometerHandleStub::new(temperature)),
}
}
pub fn connect(addr: &str) -> std::io::Result<Self> {
let handle = ThermometerClient::new(addr)?;
Ok(Self { handle: Box::new(handle) })
}
pub fn get_temperature(&self) -> Result<f32, std::io::Error> {
self.handle.get_temperature()
}
pub fn display(&self) -> impl Display {
let output = self.get_temperature();
match output {
Ok(v) => format!("Thermometer[ {:02.1} ]", v),
Err(e) => {
eprintln!("error fetching temperature: {:?}", e);
"Thermometer[ ERR ]".to_string()
}
}
}
}
trait ThermometerHandle: Debug {
fn get_temperature(&self) -> Result<f32, std::io::Error>;
}
#[derive(Debug)]
struct ThermometerHandleStub {
temperature: f32,
}
impl ThermometerHandleStub {
fn new(temperature: f32) -> Self {
Self { temperature }
}
}
impl ThermometerHandle for ThermometerHandleStub {
fn get_temperature(&self) -> Result<f32, std::io::Error> {
Ok(self.temperature)
}
}
const TIMEOUT: Duration = Duration::from_secs(5);
#[derive(Debug)]
struct ThermometerClient {
value: Arc<AtomicU32>,
}
impl ThermometerClient {
fn read(socket: &UdpSocket) -> std::io::Result<u32> {
let mut buf = [0u8; 4];
let result = socket.recv_from(&mut buf);
result.map(|_| Ok(u32::from_le_bytes(buf)))?
}
fn new(addr: &str) -> std::io::Result<Self> {
let value = Arc::new(AtomicU32::new(u32::from_le_bytes(f32::NAN.to_le_bytes())));
let socket = UdpSocket::bind(addr)?;
socket.set_read_timeout(Some(TIMEOUT))?;
let data = ThermometerClient::read(&socket)?;
value.store(data, Ordering::Relaxed);
let weak_value = Arc::downgrade(&value);
std::thread::spawn(move || {
while let Some(value) = weak_value.upgrade() {
let result = ThermometerClient::read(&socket);
match result {
Ok(data) => value.store(data, Ordering::Relaxed),
Err(e) => {
eprintln!("receiving data failed: {:?}", e);
break;
}
};
}
});
Ok(Self { value })
}
}
impl ThermometerHandle for ThermometerClient {
fn get_temperature(&self) -> Result<f32, std::io::Error> {
Ok(f32::from_le_bytes(self.value.load(Ordering::Relaxed).to_le_bytes()))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn smoke_test() {
let thermometer = Thermometer::stub(20.0);
assert_eq!(thermometer.get_temperature().unwrap(), 20.0);
}
#[test]
fn display_test() {
assert_eq!(format!("{}", Thermometer::stub(19.550).display()), "Thermometer[ 19.5 ]");
assert_eq!(format!("{}", Thermometer::stub(19.551).display()), "Thermometer[ 19.6 ]");
}
}

View File

@@ -0,0 +1,9 @@
[package]
name = "power_socket_lib"
version = "0.1.0"
edition = "2024"
[lib]
crate-type = ["rlib", "staticlib", "cdylib"]
[dependencies]

View File

@@ -0,0 +1,45 @@
#[repr(C)]
pub struct PowerSocket {
power_rate: f32,
on: bool,
}
#[unsafe(no_mangle)]
pub extern "C" fn power_socket_new(power_rate: f32, on: bool) -> PowerSocket {
PowerSocket { power_rate, on }
}
#[unsafe(no_mangle)]
pub extern "C" fn power_socket_is_on(power_socket: &PowerSocket) -> bool {
power_socket.on
}
#[unsafe(no_mangle)]
pub extern "C" fn power_socket_set_on(power_socket: &mut PowerSocket, on: bool) {
power_socket.on = on
}
#[unsafe(no_mangle)]
pub extern "C" fn power_socket_get_power(power_socket: &PowerSocket) -> f32 {
if power_socket.on { power_socket.power_rate } else { 0.0 }
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() {
let mut power_socket = power_socket_new(12.0, false);
assert_eq!(power_socket.power_rate, 12.0);
assert_eq!(power_socket.on, false);
assert_eq!(power_socket_is_on(&power_socket), false);
assert_eq!(power_socket_get_power(&power_socket), 0.0);
power_socket_set_on(&mut power_socket, true);
assert_eq!(power_socket_is_on(&power_socket), true);
assert_eq!(power_socket_get_power(&power_socket), 12.0);
}
}

View File

@@ -1,2 +0,0 @@
127.0.0.1:10002
500

View File

@@ -0,0 +1,7 @@
[package]
name = "use_dynamic"
version = "0.1.0"
edition = "2024"
[dependencies]
libloading = "0.9.0"

View File

@@ -0,0 +1,51 @@
mod ps {
#[repr(C)]
#[derive(Debug)]
pub struct PowerSocket {
power_rate: f32,
on: bool,
}
pub type FnPowerSocketNew = unsafe extern "C" fn(power_rate: f32, on: bool) -> PowerSocket;
pub type FnPowerSocketIsOn = unsafe extern "C" fn(power_socket: &PowerSocket) -> bool;
pub type FnPowerSocketSetOn = unsafe extern "C" fn(power_socket: &mut PowerSocket, on: bool);
pub type FnPowerSocketGetPower = unsafe extern "C" fn(power_socket: &PowerSocket) -> f32;
}
use ps::*;
fn main() {
let path = "target/debug/power_socket_lib.dll";
let Ok(lib) = (unsafe { libloading::Library::new(path) }) else {
eprintln!("Failed to load lib: {}", path);
return;
};
let Ok(power_socket_new) = (unsafe { lib.get::<FnPowerSocketNew>("power_socket_new") }) else {
eprintln!("Failed to get power_socket_new function from lib: {}", path);
return;
};
let Ok(power_socket_is_on) = (unsafe { lib.get::<FnPowerSocketIsOn>("power_socket_is_on") }) else {
eprintln!("Failed to get power_socket_is_on function from lib: {}", path);
return;
};
let Ok(power_socket_set_on) = (unsafe { lib.get::<FnPowerSocketSetOn>("power_socket_set_on") }) else {
eprintln!("Failed to get power_socket_set_on function from lib: {}", path);
return;
};
let Ok(power_socket_get_power) = (unsafe { lib.get::<FnPowerSocketGetPower>("power_socket_get_power") }) else {
eprintln!("Failed to get power_socket_get_power function from lib: {}", path);
return;
};
let mut power_socket = unsafe { power_socket_new(12.0, false) };
println!("call power_socket_new -> {:?}", power_socket);
println!("call power_socket_is_on -> {:?}", unsafe { power_socket_is_on(&power_socket) });
println!("call power_socket_get_power -> {:?}", unsafe { power_socket_get_power(&power_socket) });
unsafe { power_socket_set_on(&mut power_socket, true) };
println!("call power_socket_set_on(&ref, true)");
println!("call power_socket_is_on -> {:?}", unsafe { power_socket_is_on(&power_socket) });
println!("call power_socket_get_power -> {:?}", unsafe { power_socket_get_power(&power_socket) });
}

View File

@@ -0,0 +1,6 @@
[package]
name = "use_static"
version = "0.1.0"
edition = "2024"
[dependencies]

View File

@@ -0,0 +1,4 @@
fn main() {
println!("cargo:rustc-link-lib=static=power_socket_lib");
println!("cargo:rustc-link-search=target/debug");
}

View File

@@ -0,0 +1,34 @@
mod ps {
#[repr(C)]
#[derive(Debug)]
pub struct PowerSocket {
power_rate: f32,
on: bool,
}
// #[link(name = "power_socket_lib", kind = "static")]
unsafe extern "C" {
pub fn power_socket_new(power_rate: f32, on: bool) -> PowerSocket;
pub fn power_socket_is_on(power_socket: &PowerSocket) -> bool;
pub fn power_socket_set_on(power_socket: &mut PowerSocket, on: bool);
pub fn power_socket_get_power(power_socket: &PowerSocket) -> f32;
}
}
use ps::*;
fn main() {
let mut power_socket = unsafe { power_socket_new(12.0, false) };
println!("call power_socket_new -> {:?}", power_socket);
println!("call power_socket_is_on -> {:?}", unsafe { power_socket_is_on(&power_socket) });
println!("call power_socket_get_power -> {:?}", unsafe { power_socket_get_power(&power_socket) });
unsafe { power_socket_set_on(&mut power_socket, true) };
println!("call power_socket_set_on(&ref, true)");
println!("call power_socket_is_on -> {:?}", unsafe { power_socket_is_on(&power_socket) });
println!("call power_socket_get_power -> {:?}", unsafe { power_socket_get_power(&power_socket) });
}