#include <boost/chrono/system_clocks.hpp>
#include <boost/foreach.hpp>
#include <boost/thread.hpp>
#pragma hdrstop
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>

using boost::thread;
using boost::this_thread::sleep_for;
using boost::chrono::milliseconds;
using boost::chrono::system_clock;
using std::cout;
using std::endl;

void rather_lazy_thread()
{
    while (true) sleep_for(milliseconds(10000));
}

BOOST_AUTO_TEST_CASE(try_join_test)
{
    thread t(rather_lazy_thread);
    cout<<"This doesn't hang (waits 1 msec)"<<endl;
    t.try_join_until(system_clock::now()+milliseconds(1));
    cout<<"This doesn't hang either, though time is in the past"<<endl;
    t.try_join_until(system_clock::now()-milliseconds(2));
    cout<<"But this does, unless now() calls are separated by more than a millisecond, which is mostly never"<<endl;
    t.try_join_until(system_clock::now()-milliseconds(1));
    cout<<"So none of the following will happen"<<endl;
    t.interrupt();
    t.join();
}