last changes from bloomberg.

cpp/tbb/message_flow_graph_example.cpp

@@ -0,0 +1,73 @@
+/*
+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 <iostream>
+#include <exception>
+#include <cstdio>
+
+#include <tbb/flow_graph.h>
+
+using namespace tbb::flow;
+
+struct square {
+  int operator()(int v) { return v*v; }
+};
+
+struct cube {
+  int operator()(int v) { return v*v*v; }
+};
+
+class sum {
+  int &my_sum;
+public:
+  sum( int &s ) : my_sum(s) {}
+  int operator()( tuple< int, int > v ) {
+    my_sum += get<0>(v) + get<1>(v);
+    return my_sum;
+  }
+};
+
+int main()
+{try{
+    int result = 0;
+
+    graph g;
+    broadcast_node<int> input(g);
+    function_node<int,int> squarer( g, unlimited, square() );
+    function_node<int,int> cuber( g, unlimited, cube() );
+    join_node< tuple<int,int>, queueing > join( g );
+    function_node<tuple<int,int>,int>
+      summer( g, serial, sum(result) );
+
+    make_edge( input, squarer );
+    make_edge( input, cuber );
+    make_edge( squarer, get<0>( join.input_ports() ) );
+    make_edge( cuber, get<1>( join.input_ports() ) );
+    make_edge( join, summer );
+
+    for (int i = 1; i <= 10; ++i)
+      input.try_put(i);
+    g.wait_for_all();
+
+    printf("Final result is %d\n", result);
+
+    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;
+}}
+