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  1. #include <iostream>
  2. #include <thread>
  3. void thread_function_ref(int const & x)
  4. {
  5.     std::cout<<"thread_function_ref, x = "<<x<<std::endl;
  6. }
  7.  
  8. void thread_function_value(int x)
  9. {
  10.     std::cout<<"thread_function_value, x = "<<x<<std::endl;
  11. }
  12.  
  13. void thread_function_non_const(int& x)
  14. {
  15.     x++;
  16.     std::cout<<"thread_function_non_const, x = "<<x<<std::endl;
  17. }
  18.  
  19. int main()
  20. {
  21.     int x = 9;
  22.     std::thread threadObj1(thread_function_value, x);
  23.     std::thread threadObj2(thread_function_ref, std::ref(x));
  24.     std::thread threadObj3(thread_function_non_const, std::ref(x));
  25.     std::cout<<"In Main Thread : Before Thread Start x = "<<x<<std::endl;
  26.     threadObj1.join();
  27.     threadObj2.join();
  28.     threadObj3.join();
  29.     std::cout<<"In Main Thread : After Thread Joins x = "<<x<<std::endl;
  30.     return 0;
  31. }
Success #stdin #stdout 0s 4352KB
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stdin
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Standard input is empty
stdout
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In Main Thread : Before Thread Start x = 9
thread_function_non_const, x = 10
thread_function_ref, x = 10
thread_function_value, x = 9
In Main Thread : After Thread Joins x = 10
https://ideone.com/ohXjMy
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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