homework done

smart-house/use_dynamic/Cargo.toml

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

smart-house/use_dynamic/src/main.rs

@@ -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) });
+}