{

const int number_of_tests = 100;

BOOST_THREAD_LOG << "<MAIN" << BOOST_THREAD_END_LOG;

for (int i=0; i< number_of_tests; i++)

try

{

{

boost::future<int> f1 = boost::async(boost::launch::async, []() {return 123;});

int result = f1.get();

BOOST_THREAD_LOG << "f1 " << result << BOOST_THREAD_END_LOG;

}

{

boost::future<int> f1 = boost::async(boost::launch::async, []() {return 123;});

boost::future<int> f2 = f1.then([](boost::future<int> f) {return 2*f.get(); });

int result = f2.get();

BOOST_THREAD_LOG << "f2 " << result << BOOST_THREAD_END_LOG;

}

}

catch (std::exception& ex)

{

std::cout << "ERRORRRRR "<<ex.what() << "" << std::endl;

BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;

return 1;

}

catch (...)

{

std::cout << " ERRORRRRR exception thrown" << std::endl;

BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;

return 2;

}

BOOST_THREAD_LOG << "MAIN>" << BOOST_THREAD_END_LOG;

return 0;