Stop all c++ threads

March 9, 2023

I have a thread that is calling std::getline(std::cin,input) and another thread that wakes up every x mins and checks a status. If the status is True my whole c++ application needs to terminate/shutdown. Problem is getline() is a blocking call and when I set loop_status to true it still wont stop since getline() is blocking. How can I exit the thread calling the getInput()?

std::atomic<bool> loop_status{false}

//called in thread 1
getInput(){

    while(!loop_status){
          std::string input;
          getline(std::cin,input);
          print(input);
    
    }
}

//called in thread 2

check(){

   while(!loop_status){

       std::this_thread::sleep_for(chrono::milliseconds(5000));
      //check some status 

       if(some_status){

          loop_status=true;

       }


   }

}


main(){


thread t1(getInput());
thread t2(check);

t1.join();
t2.join();
  


return 0;
}

>Solution :

Simply calling std::exit(EXIT_SUCCESS) should suffice, for example:

while(!loop_status){
    std::this_thread::sleep_for(chrono::milliseconds(5000));
    //check some status 
    if(some_status){
        std::exit(EXIT_SUCCESS);
    }
}