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  1. #include <iostream>
  2. #include <sys/stat.h>
  3. #include <fcntl.h>
  4. #include <thread>
  5. #include <memory>
  6. #include <unistd.h>
  7. #include <atomic>
  8.  
  9. class FD
  10. {
  11.     private:
  12.         int fd;
  13.         static int count;
  14.  
  15.     public:
  16.         FD(const char* FilePath, int flags) : fd(open(FilePath, flags)) {++FD::count;}
  17.         FD(const FD& other) : fd(other.fd) {++FD::count;}
  18.         FD(FD&& other) : fd(other.fd) { other.fd = -1; }
  19.  
  20.         ~FD()
  21.         {
  22.             FD::count -= 1;
  23.             if (FD::count == 0)
  24.             {
  25.                 std::cout<<"Destroyed\n";
  26.                 if (is_open())
  27.                     close(fd);
  28.             }
  29.         }
  30.  
  31.         bool is_open() {return fd != -1;}
  32.         FD* operator &() {return nullptr;}
  33.         operator int() {return fd;}
  34.  
  35.         FD& operator = (FD other)
  36.         {
  37.             fd = other.fd;
  38.             FD::count += 1;
  39.             return *this;
  40.         }
  41.  
  42.         FD& operator = (FD&& other)
  43.         {
  44.             fd = other.fd;
  45.             other.fd = -1;
  46.             return *this;
  47.         }
  48. };
  49.  
  50. int FD::count = 0;
  51.  
  52. int main()
  53. {
  54. 	FD fd = FD("Unicode.cpp", O_RDONLY);
  55. 	FD copy = fd;
  56. 	FD cpy = FD(copy);
  57.  
  58. 	return 0;
  59. }
  60.  
Success #stdin #stdout 0s 3296KB
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Standard input is empty
stdout
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Destroyed
https://ideone.com/Gs4Kb7
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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