{

protected:

System::native_socket_type socket_handle;

public:

int static Startup();

int static Cleanup();

public:

Socket();

Socket(const System::native_socket_type);

Socket(const Socket &);

Socket(Socket &&);

~Socket() = default;

System::native_socket_type open();

int close();

inline bool is_open() const

{

#ifdef WIN32

return INVALID_SOCKET != socket_handle;

#elif POSIX

return ~0 != socket_handle;

#else

#error "Undefine platform"

#endif

}

int bind(const int) const;

int listen() const;

Socket accept() const;

Socket nonblock_accept() const;

Socket nonblock_accept(const std::chrono::milliseconds &) const;

int shutdown() const;

bool nonblock(const bool = true) const;

// bool is_nonblock() const;

size_t recv(std::vector<std::string::value_type> &) const;

size_t nonblock_recv(std::vector<std::string::value_type> &, const std::chrono::milliseconds &) const;

size_t send(const std::string &) const;

size_t send(const std::vector<std::string::value_type> &, const size_t) const;

size_t nonblock_send(const std::string &, const std::chrono::milliseconds &) const;

size_t nonblock_send(const std::vector<std::string::value_type> &, const size_t, const std::chrono::milliseconds &) const;

inline System::native_socket_type get_handle() const

{

return socket_handle;

}

Socket &operator =(const Socket);