Re: [Boost-users] Determining thread existence

Subject: Re: [Boost-users] Determining thread existence
From: Jeremy Rottman (rottmanj_at_[hidden])
Date: 2009-04-08 12:15:01

Anyone have any insight as to why these threads are not being terminated? I
have been doing a lot of different tests to determine where it might be
going wrong. And thus far, I have not been able to find exactly where or why
the threads will not join properly.

Here is my my recent code.
int sayHello(int x){
    cout << "Hello world from thread: " << x << endl;
}

int main(int argc, char *argv[]) {

    InitConfig mconfig;

    if(mconfig.setConfig()){

        boost::thread_group Tg;
//        int pid;
//
//        if(fork()) return 0;
//
//        chdir("/");
//        setsid();
//        umask(0);
//
//        pid = fork();
//
//        if(pid){
//            printf("Daemon Started: %d\n", pid);
//            return 0;
//        }

        //while(1){
            //if(Tg.size() == 0){
                cout << "Thread Size Before: " << Tg.size() << endl;
                for(int i = 1; i < 25; i++){
                    dmParse parse;

//Tg.create_thread(boost::bind(&dmParse::onInit,parse,i));
                    Tg.create_thread(boost::bind(sayHello,i));
                }
                cout << "Thread Size: " << Tg.size() << endl;
                Tg.join_all();
                Tg.interrupt_all();
                cout << "Thread Count After:" << Tg.size() << endl;
            //}else{
                //cout << "Threads Running, taking a nap. Thread Count: " <<
Tg.size() << endl;
                //sleep(60);
            //}
        //}
    }
}

On Tue, Apr 7, 2009 at 11:54 AM, Scott McMurray <me22.ca+boost_at_[hidden]>wrote:

> On Tue, Apr 7, 2009 at 14:45, Jeremy Rottman <rottmanj_at_[hidden]> wrote:
> >
> > Currently this is what I am testing with, when all threads are finish
> > running, I then join all the threads to terminate them. Doing so should
> give
> > me a thread group size of 0. However, this is now the case. Currently
> after
> > I join the threads, the thread group size is still 0 [sic? 24, probably].
> >
>
> Given that create_thread returns a pointer to the new thread, it makes
> since that join_all wouldn't remove the threads, since then the
> pointer would dangle.
>
> I don't know the best way to do what you want, though.
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>