add original source

source/listing_2.6.cpp

@@ -0,0 +1,56 @@
+#include <thread>
+#include <utility>
+
+class scoped_thread
+{
+    std::thread t;
+public:
+    explicit scoped_thread(std::thread t_):
+        t(std::move(t_))
+    {
+        if(!t.joinable())
+            throw std::logic_error("No thread");
+    }
+    ~scoped_thread()
+    {
+        t.join();
+    }
+    scoped_thread(scoped_thread const&)=delete;
+    scoped_thread& operator=(scoped_thread const&)=delete;
+};
+
+void do_something(int& i)
+{
+    ++i;
+}
+
+struct func
+{
+    int& i;
+
+    func(int& i_):i(i_){}
+
+    void operator()()
+    {
+        for(unsigned j=0;j<1000000;++j)
+        {
+            do_something(i);
+        }
+    }
+};
+
+void do_something_in_current_thread()
+{}
+
+void f()
+{
+    int some_local_state;
+    scoped_thread t(std::thread(func(some_local_state)));
+        
+    do_something_in_current_thread();
+}
+
+int main()
+{
+    f();
+}