homework done

smart-house/use_static/Cargo.toml

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+[package]
+name = "use_static"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

smart-house/use_static/build.rs

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

smart-house/use_static/src/main.rs

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+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) });
+}