From 444b513260258e4fdddb55317dcb67ecea0198fe Mon Sep 17 00:00:00 2001
From: Dawn <2439646234@qq.com>
Date: Tue, 19 Aug 2025 20:46:12 +0800
Subject: [PATCH] =?UTF-8?q?rust=E7=9A=84=E7=9D=A1=E7=9C=A0=E9=94=81?=
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---
 rust/sleep_lock.rs | 15 +++++++++++++++
 rust/timer.rs      |  9 +++++++++
 rust/unwrap.rs     |  6 ++++++
 3 files changed, 30 insertions(+)
 create mode 100644 rust/sleep_lock.rs
 create mode 100644 rust/timer.rs
 create mode 100644 rust/unwrap.rs

diff --git a/rust/sleep_lock.rs b/rust/sleep_lock.rs
new file mode 100644
index 0000000..495e3f1
--- /dev/null
+++ b/rust/sleep_lock.rs
@@ -0,0 +1,15 @@
+/// 用睡眠当锁（假锁）
+fn main() {
+    fn acquire_lock(path: &str) {
+        while std::path::Path::new(path).exists() {
+            std::thread::sleep(std::time::Duration::from_millis(200));
+        }
+        std::fs::write(path, b"locked").ok();
+    }
+    fn release_lock(path: &str) { let _ = std::fs::remove_file(path); }
+
+    let lock = "/tmp/lock.file";
+    acquire_lock(lock);
+    println!("临界区...");
+    release_lock(lock);
+}
\ No newline at end of file
diff --git a/rust/timer.rs b/rust/timer.rs
new file mode 100644
index 0000000..8b5811a
--- /dev/null
+++ b/rust/timer.rs
@@ -0,0 +1,9 @@
+/// 自旋“计时器”（CPU 风扇起飞）直接占满一个核心，不释放，🤣
+fn spin(ms: u64) {
+    let start = std::time::Instant::now();
+    while start.elapsed().as_millis() < ms as u128 {}
+}
+fn main() {
+    spin(1000);
+    println!("OK");
+}
\ No newline at end of file
diff --git a/rust/unwrap.rs b/rust/unwrap.rs
new file mode 100644
index 0000000..b819877
--- /dev/null
+++ b/rust/unwrap.rs
@@ -0,0 +1,6 @@
+/// 一步错步步错
+fn main() {
+    let port: u16 = std::env::var("PORT").unwrap().parse().unwrap();
+    let cfg = std::fs::read_to_string("config.toml").unwrap();
+    println!("PORT={port}, first={}", cfg.lines().next().unwrap());
+}
\ No newline at end of file
-- 
Gitee