share 7

Chapter08/Cargo.toml

@@ -68,3 +68,11 @@ path = "share4.rs"
 name = "share5"
 path = "share5.rs"
 
+[[bin]]
+name = "share6"
+path = "share6.rs"
+
+[[bin]]
+name = "share7"
+path = "share7.rs"
+

Chapter08/share6.rs

@@ -0,0 +1,21 @@
+use std::thread;
+use std::sync::{Arc,Mutex};
+
+fn main() {
+   let a = Arc::new(Mutex::new(vec![1, 2, 3]));
+   {
+      let a = Arc::clone(&a);
+      thread::spawn(move || {
+         let mut a = a.lock().unwrap();
+         (*a)[1] = 2;
+      });
+   }
+
+   {
+      let a = Arc::clone(&a);
+      thread::spawn(move || {
+         let mut a = a.lock().unwrap();
+         (*a)[1] = 3;
+      });
+   }
+}

Chapter08/share7.rs

@@ -0,0 +1,17 @@
+use std::thread;
+
+struct MyBox(u8);
+unsafe impl Send for MyBox {}
+unsafe impl Sync for MyBox {}
+
+static A: MyBox = MyBox(22);
+
+fn main() {
+   thread::spawn(move || {
+      A.0
+   });
+
+   thread::spawn(move || {
+      A.0
+   });
+}