Added exemplary unit test for iter_mut().

[rust-101.git] / src / part15.rs

diff --git a/src/part15.rs b/src/part15.rs
index 47952d6995bb08a06b02602d61296a5b957209d3..b1cab06d9b4bd91cc4fefc3ed24d033fa364b50e 100644 (file)
--- a/src/part15.rs
+++ b/src/part15.rs
@@ -3,6 +3,7 @@
 
 use std::sync::{Arc, Mutex};
 use std::thread;
 
 use std::sync::{Arc, Mutex};
 use std::thread;

+use std::time::Duration;

 
 //@ We already saw that we can use `Arc` to share memory between threads. However, `Arc` can only provide *read-only*
 //@ access to memory: Since there is aliasing, Rust cannot, in general, permit mutation. To implement shared-memory
 
 //@ We already saw that we can use `Arc` to share memory between threads. However, `Arc` can only provide *read-only*
 //@ access to memory: Since there is aliasing, Rust cannot, in general, permit mutation. To implement shared-memory


@@ -70,7 +71,7 @@ pub fn main() {
     let counter1 = counter.clone();
     let handle1 = thread::spawn(move || {
         for _ in 0..10 {
     let counter1 = counter.clone();
     let handle1 = thread::spawn(move || {
         for _ in 0..10 {

-            thread::sleep_ms(15);
+            thread::sleep(Duration::from_millis(15));

             counter1.increment(2);
         }
     });
             counter1.increment(2);
         }
     });


@@ -79,14 +80,14 @@ pub fn main() {
     let counter2 = counter.clone();
     let handle2 = thread::spawn(move || {
         for _ in 0..10 {
     let counter2 = counter.clone();
     let handle2 = thread::spawn(move || {
         for _ in 0..10 {

-            thread::sleep_ms(20);
+            thread::sleep(Duration::from_millis(20));

             counter2.increment(3);
         }
     });
 
     // Now we watch the threads working on the counter.
     for _ in 0..50 {
             counter2.increment(3);
         }
     });
 
     // Now we watch the threads working on the counter.
     for _ in 0..50 {

-        thread::sleep_ms(5);
+        thread::sleep(Duration::from_millis(5));

         println!("Current value: {}", counter.get());
     }
 
         println!("Current value: {}", counter.get());
     }
 


@@ -99,7 +100,7 @@ pub fn main() {
 // **Exercise 15.1**: Add an operation `compare_and_inc(&self, test: usize, by: usize)` that increments the counter by
 // `by` *only if* the current value is `test`.
 // 
 // **Exercise 15.1**: Add an operation `compare_and_inc(&self, test: usize, by: usize)` that increments the counter by
 // `by` *only if* the current value is `test`.
 // 

-// **Exercise 15.2**: Rather than panicking in case the lock is poisoned, we can use `into_innter` on the error to recover
+// **Exercise 15.2**: Rather than panicking in case the lock is poisoned, we can use `into_inner` on the error to recover

 // the data inside the lock. Change the code above to do that. Try using `unwrap_or_else` for this job.
 
 //@ ## `RwLock`
 // the data inside the lock. Change the code above to do that. Try using `unwrap_or_else` for this job.
 
 //@ ## `RwLock`


@@ -120,7 +121,7 @@ pub fn main() {
 //@ In part 13, we talked about types that are marked `Send` and thus can be moved to another thread. However, we did *not*
 //@ talk about the question whether a reference is `Send`. For `&mut T`, the answer is: It is `Send` whenever `T` is send.
 //@ `&mut` allows moving values back and forth, it is even possible to [`swap`](https://doc.rust-lang.org/stable/std/mem/fn.swap.html)
 //@ In part 13, we talked about types that are marked `Send` and thus can be moved to another thread. However, we did *not*
 //@ talk about the question whether a reference is `Send`. For `&mut T`, the answer is: It is `Send` whenever `T` is send.
 //@ `&mut` allows moving values back and forth, it is even possible to [`swap`](https://doc.rust-lang.org/stable/std/mem/fn.swap.html)

-//@ the contents of two mutable references. So in terms of concurrency, sending a mutable, exclusive reference is very much like
+//@ the contents of two mutable references. So in terms of concurrency, sending a mutable, unique reference is very much like

 //@ sending full ownership, in the sense that it can be used to move the object to another thread.
 //@ 
 //@ But what about `&T`, a shared reference? Without interior mutability, it would always be all-right to send such values.
 //@ sending full ownership, in the sense that it can be used to move the object to another thread.
 //@ 
 //@ But what about `&T`, a shared reference? Without interior mutability, it would always be all-right to send such values.


@@ -144,4 +145,4 @@ pub fn main() {
 //@ [Rust RFC](https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md), which contains a type `RcMut` that would be `Sync` and not `Send`.
 //@ You may also be interested in [this blog post](https://huonw.github.io/blog/2015/02/some-notes-on-send-and-sync/) on the topic.
 
 //@ [Rust RFC](https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md), which contains a type `RcMut` that would be `Sync` and not `Send`.
 //@ You may also be interested in [this blog post](https://huonw.github.io/blog/2015/02/some-notes-on-send-and-sync/) on the topic.
 

-//@ [index](main.html) | [previous](part14.html) | [raw source](https://www.ralfj.de/git/rust-101.git/blob_plain/HEAD:/workspace/src/part15.rs) | [next](part16.html)
+//@ [index](main.html) | [previous](part14.html) | [raw source](workspace/src/part15.rs) | [next](part16.html)