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  1. #include <thread>
  2. #include <future>
  3. #include <chrono>
  4. #include <iostream>
  5. #include <chrono>
  6. using namespace std;
  7.  
  8. struct SharedStateWhichBlocks {
  9.     ~SharedStateWhichBlocks()
  10.     {
  11.         thread t([]() {
  12.             this_thread::sleep_for(std::chrono::seconds(5));
  13.         });
  14.         t.join();
  15.         cout << "~SharedStateWhichBlocks" << endl;
  16.     }
  17. };
  18.  
  19. int main()
  20. {
  21.  
  22. 	auto start = std::chrono::high_resolution_clock::now();
  23.     SharedStateWhichBlocks *state = new SharedStateWhichBlocks();
  24.     {
  25.         promise<SharedStateWhichBlocks> pr;
  26.         future<SharedStateWhichBlocks> fut = pr.get_future();
  27.         pr.set_value(*state);
  28.         cout << "Will now block since ~SharedStateWhichBlocks will be called" << endl;
  29.     }
  30.     auto end = std::chrono::high_resolution_clock::now();
  31.     auto difference = std::chrono::duration_cast<std::chrono::seconds>(end - start).count();
  32.     std::cout << "Seconds for the block { ... } " << difference << endl;
  33. }
Success #stdin #stdout 0s 17296KB
comments (?)
stdin 
Standard input is empty
stdout 
Will now block since ~SharedStateWhichBlocks will be called
~SharedStateWhichBlocks
Seconds for the block { ... } 5
https://ideone.com/5RAPoA
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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