Update dependencies, bump version

Cargo.toml

@@ -1,19 +1,18 @@
 [package]
 
 name = "scoped-pool"
-version = "1.0.0"
+version = "1.1.0"
 authors = ["Jonathan Reem <[email protected]>"]
 repository = "https://github.com/reem/rust-scoped-pool.git"
 description = "A flexible thread pool providing scoped threads."
 readme = "README.md"
 license = "MIT"
 
 [dependencies]
-variance = "0.1"
-crossbeam = "0.2"
-scopeguard = "0.1"
+variance = "0.1.3"
+crossbeam-channel = "0.3.8"
+scopeguard = "1.0.0"
 
 [dev-dependencies]
-rand = "0.3"
-itertools = "0.4"
-
+rand = "0.6.5"
+itertools = "0.8.0"

README.md

@@ -65,9 +65,11 @@ with the rest of your dependencies:
 
 ```toml
 [dependencies]
-scoped-pool = "1"
+scoped-pool = "1.1"
 ```
 
+`scoped-pool` currently requires Rust 1.28.
+
 ## Author
 
 [Jonathan Reem](https://medium.com/@jreem) is the primary author and maintainer of scoped-pool.

src/lib.rs

@@ -7,13 +7,13 @@
 //!
 
 extern crate variance;
-extern crate crossbeam;
+extern crate crossbeam_channel;
 
 #[macro_use]
 extern crate scopeguard;
 
 use variance::InvariantLifetime as Id;
-use crossbeam::sync::MsQueue;
+use crossbeam_channel::{Sender, Receiver};
 
 use std::{thread, mem};
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
@@ -128,7 +128,7 @@ impl Pool {
     #[inline]
     pub fn shutdown(&self) {
         // Start the shutdown process.
-        self.inner.queue.push(PoolMessage::Quit);
+        let _ = self.inner.tx.send(PoolMessage::Quit);
 
         // Wait for it to complete.
         self.wait.join()
@@ -165,18 +165,18 @@ impl Pool {
         let mut thread_sentinel = ThreadSentinel(Some(self.clone()));
 
         loop {
-            match self.inner.queue.pop() {
+            match self.inner.rx.recv().unwrap() {
                 // On Quit, repropogate and quit.
                 PoolMessage::Quit => {
                     // Repropogate the Quit message to other threads.
-                    self.inner.queue.push(PoolMessage::Quit);
+                    let _ = self.inner.tx.send(PoolMessage::Quit);
 
                     // Cancel the thread sentinel so we don't panic waiting
                     // shutdown threads, and don't restart the thread.
                     thread_sentinel.cancel();
 
                     // Terminate the thread.
-                    break
+                    break;
                 },
 
                 // On Task, run the task then complete the WaitGroup.
@@ -191,21 +191,27 @@ impl Pool {
 }
 
 struct PoolInner {
-    queue: MsQueue<PoolMessage>,
+    tx: Sender<PoolMessage>,
+    rx: Receiver<PoolMessage>,
     thread_config: ThreadConfig,
-    thread_counter: AtomicUsize
+    thread_counter: AtomicUsize,
 }
 
 impl PoolInner {
     fn with_thread_config(thread_config: ThreadConfig) -> Self {
-        PoolInner { thread_config: thread_config, ..Self::default() }
+        PoolInner {
+            thread_config,
+            ..Default::default()
+        }
     }
 }
 
 impl Default for PoolInner {
     fn default() -> Self {
+        let (tx, rx) = crossbeam_channel::unbounded();
         PoolInner {
-            queue: MsQueue::new(),
+            tx,
+            rx,
             thread_config: ThreadConfig::default(),
             thread_counter: AtomicUsize::new(1)
         }
@@ -279,7 +285,7 @@ impl<'scope> Scope<'scope> {
     #[inline]
     pub fn forever(pool: Pool) -> Scope<'static> {
         Scope {
-            pool: pool,
+            pool,
             wait: Arc::new(WaitGroup::new()),
             _scope: Id::default()
         }
@@ -301,7 +307,7 @@ impl<'scope> Scope<'scope> {
         };
 
         // Submit the task to be executed.
-        self.pool.inner.queue.push(PoolMessage::Task(task, self.wait.clone()));
+        let _ = self.pool.inner.tx.send(PoolMessage::Task(task, self.wait.clone()));
     }
 
     /// Add a job to this scope which itself will get access to the scope.
@@ -322,7 +328,7 @@ impl<'scope> Scope<'scope> {
     pub fn zoom<'smaller, F, R>(&self, scheduler: F) -> R
     where F: FnOnce(&Scope<'smaller>) -> R,
           'scope: 'smaller {
-        let scope = unsafe { self.refine::<'smaller>() };
+        let scope = unsafe { self.refine() };
 
         // Join the scope either on completion of the scheduler or panic.
         defer!(scope.join());