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  1. #include <iostream>
  2. #include <thread>
  3. #include <mutex>
  4. #include <atomic>
  5. #include <chrono>
  6. using namespace std;
  7.  
  8. struct info
  9. {
  10.     std::mutex access; 
  11.     string name;
  12.  
  13. };
  14.  
  15. info userStruct; //this guy shared between two threads
  16.  
  17. void f() 
  18. {
  19.     while (1)
  20.     {
  21.     		std::lock_guard<std::mutex> lock(userStruct.access);
  22.         	userStruct.name= "TEST";
  23.     }   
  24. }
  25.  
  26. void g()
  27. {
  28.     while (1)
  29.     {
  30.     	{
  31.     		std::unique_lock<std::mutex> lock(userStruct.access, std::try_to_lock);
  32. 			if(!lock.owns_lock()){ 
  33. 				std::cout << "No lock" <<std::endl; 
  34. 			}
  35.         	else
  36.         	{
  37. 				std::cout << "Got access:" << userStruct.name <<std::endl;
  38.         	}
  39.     	}
  40.         std::this_thread::sleep_for(std::chrono::milliseconds(500));
  41. //        std::this_thread::yield(); 
  42.     }
  43. }
  44. int main() {
  45. 	thread t1(f);
  46. 	thread t2(g);
  47. 	t1.join();
  48. 	t2.join(); 
  49. 	return 0;
  50. }
Time limit exceeded #stdin #stdout 5s 84864KB
comments (?)
stdin 
Standard input is empty
stdout 
Got access:
Got access:TEST
No lock
No lock
No lock
No lock
Got access:TEST
No lock
No lock
Got access:TEST
Got access:TEST
https://ideone.com/DQkaPG
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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