c++ boost threading issue

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I am quite new to C++ multithreading. I have the following flow of code:

Main Thread:

  • Creates a queue
  • Creates a Second Thread
  • Adds items to the queue
  • Ends

Second Thread:

  • If queue has items, pops it.
    (the second thread exits when a flag is set to exit).

The problem is, once main function finishes adding items to queue, it stops. Adding a .join() after creating the second thread would just make it to hang infinitely.

Can anyone describe a way to work this out?

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sehe On

It seems the second thread is not seeing the 'exit' flag.

Be sure to synchronize access to it or make it a atomic_bool, e.g.