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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.         int* count;
  14.  
  15.     public:
  16.         FD(const char* FilePath, int flags) : fd(open(FilePath, flags)), count(new int(1)) {}
  17.         FD(const FD& other) : fd(other.fd), count(other.count) {*count += 1;}
  18.         FD(FD&& other) : fd(other.fd), count(other.count) { other.count = nullptr; other.fd = -1; }
  19.  
  20.         ~FD()
  21.         {
  22.             *count -= 1;
  23.             if (*count == 0)
  24.             {
  25.                 std::cout<<"Destroyed\n";
  26.                 delete count;
  27.                 count = NULL;
  28.  
  29.                 if (is_open())
  30.                     close(fd);
  31.             }
  32.         }
  33.  
  34.         bool is_open() {return fd != -1;}
  35.         FD* operator &() {return nullptr;}
  36.         operator int() {return fd;}
  37.  
  38.         FD& operator = (FD other)
  39.         {
  40.             fd = other.fd;
  41.             count = other.count;
  42.             *count += 1;
  43.             return *this;
  44.         }
  45.  
  46.         FD& operator = (FD&& other)
  47.         {
  48.             fd = other.fd;
  49.             count = other.count;
  50.             other.fd = -1;
  51.             other.count = NULL;
  52.             return *this;
  53.         }
  54. };
  55.  
  56. int main()
  57. {
  58. 	FD fd = FD("Unicode.cpp", O_RDONLY);
  59. 	FD copy = fd;
  60. 	FD cpy = FD(copy);
  61.  
  62. 	return 0;
  63. }
  64.  
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Destroyed
https://ideone.com/m3kmaJ
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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