From f2dad4eb10718cf37d6d825957122f4f81cdb6b5 Mon Sep 17 00:00:00 2001
From: Andrew Johnson <andrewjohnson@Andrews-MacBook-Pro.local>
Date: Thu, 17 May 2018 14:53:53 -0600
Subject: [PATCH] share 7

---
 Chapter08/Cargo.toml |  8 ++++++++
 Chapter08/share6.rs  | 21 +++++++++++++++++++++
 Chapter08/share7.rs  | 17 +++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 Chapter08/share6.rs
 create mode 100644 Chapter08/share7.rs

diff --git a/Chapter08/Cargo.toml b/Chapter08/Cargo.toml
index a77cc08..33ee6c8 100644
--- a/Chapter08/Cargo.toml
+++ b/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"
+
diff --git a/Chapter08/share6.rs b/Chapter08/share6.rs
new file mode 100644
index 0000000..51aaf8a
--- /dev/null
+++ b/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;
+      });
+   }
+}
diff --git a/Chapter08/share7.rs b/Chapter08/share7.rs
new file mode 100644
index 0000000..80b9760
--- /dev/null
+++ b/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
+   });
+}