added sources and a quote to notes

notes.rst

@@ -75,6 +75,7 @@ regular expressions and threading
 
 - this is where the burning starts to set in ...
 - threading works ... mostly
+    - `great quote`_
     - compiles and runs with both compilers
     - run stress
 - regex examples
@@ -83,6 +84,7 @@ regular expressions and threading
         - instructions on building this found `here`_
 
 .. _`here`: http://solarianprogrammer.com/2011/10/16/llvm-clang-libc-linux/
+.. _`great quote`: https://twitter.com/nedbat/status/194452404794691584
 
 constexpr
 =========

thread.cc

@@ -1,18 +1,17 @@
+// based on: http://solarianprogrammer.com/2011/12/16/cpp-11-thread-tutorial/
 #include <iostream>
 #include <thread>
 
-//This function will be called from a thread
-
 void call_from_thread() {
-    std::cout << "Hello, World" << std::endl;
+    std::cout << "sleeping in the thread" << std::endl;
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+    std::cout << "finishing in thread" << std::endl;
 }
 
 int main() {
-    //Launch a thread
     std::thread t1(call_from_thread);
-
+    std::cout << "printing from original thread" << std::endl;
-    //Join the thread with the main thread
     t1.join();
-
+    std::cout << "after join" << std::endl;
     return 0;
 }

thread2.cc

@@ -1,25 +1,26 @@
+// from: http://solarianprogrammer.com/2011/12/16/cpp-11-thread-tutorial/
 #include <iostream>
 #include <thread>
 
-static const int num_threads = 10;
+static const int num_threads = 8;
-
-//This function will be called from a thread
 
 void call_from_thread(int tid) {
     std::cout << "Launched by thread " << tid << std::endl;
+    double x = 1.0;
+    for(int i = 0; i < 2E9; i++) {
+        x /= 2;
+    }
 }
 
 int main() {
     std::thread t[num_threads];
 
-    //Launch a group of threads
     for (int i = 0; i < num_threads; ++i) {
         t[i] = std::thread(call_from_thread, i);
     }
 
     std::cout << "Launched from the main\n";
 
-    //Join the threads with the main thread
     for (int i = 0; i < num_threads; ++i) {
         t[i].join();
     }