last changes from bloomberg.

cpp/tbb/simple_flow_graph.cpp

@@ -0,0 +1,70 @@
+/*
+VIM: let b:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let b:wcppflags="/O2 /EHsc /DWIN32"
+VIM: let b:cppflags=g:Iboost.g:Itbb
+VIM: let b:ldflags=g:Lboost.g:Ltbb
+VIM: let b:ldlibpath=g:Bboost.g:Btbb
+VIM: let b:argv=""
+*/
+#include <sstream>
+#include <iostream>
+#include <exception>
+#include <memory>
+
+#include "tbb/flow_graph.h"
+
+using namespace tbb::flow;
+
+typedef std::shared_ptr<std::string> msg_type;
+
+struct body {
+    std::string my_name;
+    body( const char *name ) : my_name(name) {}
+    void operator()( msg_type msg ) const {
+        std::stringstream ss;
+        ss << my_name << " got " << *msg << std::endl;
+        std::cout << ss.str();
+    }
+};
+
+int main()
+{try{
+    graph g;
+
+    broadcast_node<msg_type> start( g );
+    continue_node<msg_type> a( g, body("A"));
+    continue_node<msg_type> b( g, body("B"));
+    continue_node<msg_type> c( g, body("C"));
+    continue_node<msg_type> d( g, body("D"));
+    continue_node<msg_type> e( g, body("E"));
+
+    make_edge( start, a );
+    make_edge( start, b );
+    make_edge( a, c );
+    make_edge( b, c );
+    make_edge( c, d );
+    make_edge( a, e );
+
+    for (int i = 0; i < 3; ++i ) {
+        std::stringstream ss;
+        ss << i << std::endl;
+
+        start.try_put( std::make_shared( ss.str() ) );
+        g.wait_for_all();
+    }
+
+    return 0;
+}
+catch ( const std::exception& e )
+{
+    std::cerr << std::endl
+            << "std::exception(\"" << e.what() << "\")." << std::endl;
+    return 2;
+}
+catch ( ... )
+{
+    std::cerr  << std::endl
+            << "unknown exception." << std::endl;
+    return 1;
+}}
+