AutoCloseFD.h

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#pragma once
 
#include <cerrno>
 
namespace nixd::util {
 
/// \brief File Descriptor RAII wrapper
class AutoCloseFD {
public:
  using FDTy = int;
 
private:
  static constexpr FDTy ReleasedFD = -EBADF;
  FDTy FD;
 
public:
  AutoCloseFD(FDTy FD);
  AutoCloseFD(const AutoCloseFD &) = delete;
  AutoCloseFD(AutoCloseFD &&That) noexcept;
 
  [[nodiscard]] bool isReleased() const;
  static bool isReleased(FDTy FD);
 
  ~AutoCloseFD();
 
  [[nodiscard]] FDTy get() const;
  void release();
};
 
} // namespace nixd::util