{

protected:

System::native_socket_type socket_handle;

public:

bool static Startup();

bool static Cleanup();

int static getLastError();

public:

Socket();

Socket(const System::native_socket_type fd);

Socket(const Socket &obj);

Socket(Socket &&obj);

~Socket() = default;

bool open();

bool close();

bool is_open() const;

System::native_socket_type get_handle() const;

bool bind(const int port) const;

bool listen() const;

Socket accept() const;

Socket nonblock_accept() const;

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

bool shutdown() const;

bool nonblock(const bool isNonBlock = true) const;

// bool is_nonblock() const;

bool tcp_nodelay(const bool nodelay = true) const;

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

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

long send(const std::string &buf) const;

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

long nonblock_send(const std::string &buf, const std::chrono::milliseconds &timeout) const;

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

void nonblock_send_sync() const;

Socket &operator =(const Socket &obj);

bool operator ==(const Socket &obj) const;

bool operator !=(const Socket &obj) const;