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  1. #include<iostream>
  2. #include<string>
  3. #include<thread>
  4. #include<mutex>
  5.  
  6. class ThreadWrapper
  7. {
  8. 	ThreadWrapper()
  9. 	{
  10. 		start();
  11. 	}
  12.  
  13.  
  14. 	void start()
  15. 	{		
  16. 		//init SDL here
  17.  
  18. 		_thread = std::thread([&]() { run(); });
  19. 	}
  20.  
  21. 	void stop()
  22. 	{
  23.  
  24. 		//signal thread to stop
  25.  
  26. 		_thread.join();
  27.  
  28. 		//you can deinit SDL here
  29. 	}
  30. public:
  31. 	~ThreadWrapper()
  32. 	{
  33. 		stop();
  34. 	}
  35.  
  36.  
  37. 	static auto& instance()
  38. 	{
  39. 		std::lock_guard<std::mutex> lock(_instance_mutex);
  40. 		if (!_instance)
  41. 			_instance.reset(new ThreadWrapper);
  42. 		return *_instance;
  43. 	}
  44.  
  45. 	static void initialize()
  46. 	{
  47. 		instance();
  48. 	}
  49. 	static void deinitialize()
  50. 	{
  51. 		std::lock_guard<std::mutex> lock(_instance_mutex);
  52. 		_instance.reset();
  53. 	}
  54.  
  55. protected:
  56. 	void run()
  57. 	{
  58.  
  59. 	}
  60.  
  61. 	std::thread _thread;
  62.  
  63. 	static std::unique_ptr<ThreadWrapper> _instance;
  64. 	static std::mutex                     _instance_mutex;
  65. };
  66.  
  67. std::unique_ptr<ThreadWrapper> ThreadWrapper::_instance;
  68. std::mutex                     ThreadWrapper::_instance_mutex;
  69.  
  70. int main()
  71. {
  72. 	ThreadWrapper::initialize();
  73. 	ThreadWrapper::deinitialize();
  74. 	ThreadWrapper::deinitialize();
  75.  
  76. 	ThreadWrapper::initialize();
  77. 	ThreadWrapper::deinitialize();
  78.  
  79.  
  80.  
  81. 	ThreadWrapper::deinitialize();
  82.     return 0;
  83. }
  84.  
  85.  
Success #stdin #stdout 0s 11648KB
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https://ideone.com/AclJqe
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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