add original source

source/listing_10.1.cpp

@@ -0,0 +1,42 @@
+void test_concurrent_push_and_pop_on_empty_queue()
+{
+    threadsafe_queue<int> q;
+
+    std::promise<void> go,push_ready,pop_ready;
+    std::shared_future<void> ready(go.get_future());
+
+    std::future<void> push_done;
+    std::future<int> pop_done;
+
+    try
+    {
+        push_done=std::async(std::launch::async,
+                             [&q,ready,&push_ready]()
+                             {
+                                 push_ready.set_value();
+                                 ready.wait();
+                                 q.push(42);
+                             }
+            );
+        pop_done=std::async(std::launch::async,
+                            [&q,ready,&pop_ready]()
+                            {
+                                pop_ready.set_value();
+                                ready.wait();
+                                return q.pop();
+                            }
+            );
+        push_ready.get_future().wait();
+        pop_ready.get_future().wait();
+        go.set_value();
+
+        push_done.get();
+        assert(pop_done.get()==42);
+        assert(q.empty());
+    }
+    catch(...)
+    {
+        go.set_value();
+        throw;
+    }
+}