HOn Thu, Mar 11, 2010 at 7:06 PM, Conoscenza Silente <abruzzoforteegentile@gmail.com> wrote:

Hi all
I am doing my first steps in using boost::unique_future and below the example of usage
that arose my question.
Looking at the C++0x I can see that you can create a future using std::async.
If I understood correctly the good thing of it is that, based on some policy that I imaging to be related
to number of core availables+other things, std::async will choice for you whether to run your functions
in a specific thread, or using a ThreadPool or other available resources.
With the code I did below, once I have 2 functions I am forced to use alwyas 2 threads.
Do you know what are the alternatives in Boost/ Boost Thread and if right now there is/there
will be an equivalent of std::async in Boost?
Thanks

int firstBigOne(){
    for( int i = 0; i < 3; i++ ){
        std::cout << "firstBigOne" << std::endl;
        boost::this_thread::sleep( boost::posix_time::milliseconds(200) );
    }

    return 10;
}

int secondBigOne(){
    for( int i = 0; i < 4; i++ ){
        std::cout << "secondBigONe" << std::endl;
        boost::this_thread::sleep( boost::posix_time::milliseconds(200) );
    }
    return 20;
}

void TestC(){
    try{
        boost::packaged_task<int> pt1(firstBigOne);
        boost::packaged_task<int> pt2(secondBigOne);

        boost::unique_future<int> f1=pt1.get_future();
        boost::unique_future<int> f2=pt2.get_future();

        boost::thread t1( boost::move( pt1 ));
        boost::thread t2( boost::move( pt2 ));