Problem with thread library usage in c++11

Question

4.00/5 (1 vote)

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I want to use thread library, when the thread is member function of class
assume I have 2 thread in a class

What I have tried:

class produceconsume
{
    public:
        produceconsume();
        virtual ~produceconsume();
        thread producer()
        {
            return std::thread(&producerth, this);
        }
        thread consumer()
        {
            return std::thread(&consumerth, this);
        }
        void producerth();
        void consumerth();
        void run();
    private:
};

where producerth and consumerth() have while true loop,
and run implements as following:

void run()
{
      producer() 
      consumer()
}

I got the run time termination in an unusual way exception

help me to fix the bug

Posted 23-Oct-18 20:37pm

saide_a

Updated 23-Oct-18 21:00pm

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CPallini · Accepted Answer · 2018-10-23T21:01:00

That's because the consumer and producer threads outlive the main thread (your program terminates immediately after thread creation).
Try, for instance:

C++

#include <iostream>
#include <thread>

class produceconsume
{
    public:
        produceconsume(){}
        virtual ~produceconsume(){}
        std::thread producer()
        {
            return std::thread(&produceconsume::producerth, this);
        }
        std::thread consumer()
        {
            return std::thread(&produceconsume::consumerth, this);
        }
        void producerth();
        void consumerth();
        void run();
    private:
};

void produceconsume::producerth()
{
  while (true) {}
}
void produceconsume::consumerth()
{
  while (true) {}
}
void produceconsume::run()
{
  auto tp = producer();
  auto tc = consumer();
  tc.join();
  tp.join();
}