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  1. #include <thread>
  2. #include <condition_variable>
  3. #include <memory>
  4. #include <iostream>
  5. #include <list>
  6. #include <atomic>
  7. std::condition_variable cv;
  8. std::mutex m;
  9. std::thread t;
  10. std::atomic<bool> shouldExit;
  11. std::list<int> jobs;
  12.  
  13. void thread_func()
  14. {
  15.   while (!shouldExit) 
  16.   {
  17.   	int j ;
  18.   	{
  19.       std::unique_lock<std::mutex> lock(m);
  20.       while (jobs.empty() && !shouldExit) {
  21.         cv.wait(lock);
  22.       }
  23.       // Do some stuff
  24.       if (jobs.empty()) {
  25.         continue;
  26.       }
  27.       // Get a job and do something with it
  28.       j = std::move(jobs.front());
  29.       jobs.pop_front();
  30.   	}
  31.     std::cout << "Do something with job " << j << std::endl;
  32.     std::this_thread::sleep_for(std::chrono::milliseconds(1));
  33.   }
  34. }
  35.  
  36. int main()
  37. {
  38.   shouldExit.store(false);
  39.   t = std::thread(thread_func);
  40.  
  41.   for (int i = 1; i < 100; ++i) {
  42.     std::cout << "Push to job " << i << std::endl;
  43.     {
  44.     std::lock_guard<std::mutex> lock(m);
  45.     jobs.push_back(i);
  46.     cv.notify_one();
  47.     }
  48.     std::this_thread::sleep_for(std::chrono::milliseconds(1));
  49.   }
  50.  
  51.   // To wait for thread exit
  52.   shouldExit.store(true);
  53.   cv.notify_one();
  54.   t.join();
  55.   return 0;
  56. }
Success #stdin #stdout 0s 11656KB
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stdin
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Standard input is empty
stdout
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Push to job 1
Do something with job 1
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https://ideone.com/41DHC3
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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