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  1. #include <unistd.h>
  2. #include <iomanip>
  3. #include <iostream>
  4. #include <thread>
  5. #include <utility>
  6.  
  7. class ManagedThread
  8. {
  9. public:
  10.    template< class Function, class... Args> explicit ManagedThread( Function&& f, Args&&... args);
  11.    ~ManagedThread() { mThread.join(); }
  12.    bool isActive() const { return mActive; }
  13. private:
  14.    volatile bool  mActive;
  15.    std::thread    mThread;
  16. };
  17.  
  18. template< class Function, class... Args>
  19.    void threadFunction( volatile bool& active_flag, Function&& f, Args&&... args)
  20. {
  21.    active_flag = true;
  22.    f( args...);
  23.    active_flag = false;
  24. }
  25.  
  26. template< class Function, class... Args>
  27.    ManagedThread::ManagedThread( Function&& f, Args&&... args):
  28.       mActive( false),
  29.       mThread( threadFunction< Function, Args...>, std::ref( mActive),
  30.                std::ref( f), std::forward< Args>( args)...)
  31. {
  32. }
  33.  
  34. static void func() { std::cout << "thread 1" << std::endl; }
  35.  
  36. int main() {
  37.    ManagedThread  mt1( func);
  38.    std::cout << "thread 1 active = " << std::boolalpha << mt1.isActive() << std::endl;
  39.    ::sleep( 1);
  40.    std::cout << "thread 1 active = " << std::boolalpha << mt1.isActive() << std::endl;
  41.  
  42.    return 0;
  43. }
  44.  
Success #stdin #stdout 0s 5520KB
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Standard input is empty
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thread 1 active = false
thread 1
thread 1 active = false
https://ideone.com/jhBF1q
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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