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  1. #include <iostream>
  2. #include <future>
  3. #include <chrono>
  4. using namespace std;
  5. mutex outMutex;
  6. class Test
  7. {
  8. public:
  9.     Test(){}
  10.     void out(int No, double& q) const
  11.     {
  12.         {
  13.             lock_guard<mutex> tst(outMutex);
  14.             cout << "<- " << No << " -- " << &q << endl;
  15.         }
  16.         this_thread::sleep_for(chrono::seconds(1));
  17.     }
  18.     void test() const;
  19. };
  20. void Test::test() const
  21. {
  22.     double w[2];
  23.     cout << "-> " << 0 << " -- " << &w[0] << endl;
  24.     future<void> f1 = async( &Test::out,this,0,ref(w[0]));
  25.     {
  26.         lock_guard<mutex> tst(outMutex);
  27.         cout << "-> " << 1 << " -- " << &w[1] << endl;
  28.     }
  29.     future<void> f2 = async( &Test::out,this,1,ref(w[1]));
  30.     f1.get();
  31.     f2.get();
  32. }
  33. int main(int argc, const char * argv[])
  34. {
  35.     try {
  36.         Test t;
  37.         t.test();
  38.     }
  39.     catch(exception&e)
  40.     {
  41.         cout << "\n" << e.what() << endl;
  42.     }
  43. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
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Standard input is empty
stdout
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-> 0 -- 0xbfc076d0
-> 1 -- 0xbfc076d8
<- 0 -- 0xbfc076d0
<- 1 -- 0xbfc076d8
https://ideone.com/zmvJxG
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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