add original source

source/listing_9.9.cpp

@@ -0,0 +1,31 @@
+class interrupt_flag
+{
+public:
+    void set();
+    bool is_set() const;
+};
+thread_local interrupt_flag this_thread_interrupt_flag;
+
+class interruptible_thread
+{
+    std::thread internal_thread;
+    interrupt_flag* flag;
+public:
+    template<typename FunctionType>
+    interruptible_thread(FunctionType f)
+    {
+        std::promise<interrupt_flag*> p;
+        internal_thread=std::thread([f,&p]{
+                p.set_value(&this_thread_interrupt_flag);
+                f();
+            });
+        flag=p.get_future().get();
+    }
+    void interrupt()
+    {
+        if(flag)
+        {
+            flag->set();
+        }
+    }
+};