basic_socket::io_control (1 of 2 overloads)

Perform an IO control command on the socket.

template<
    typename IoControlCommand>
void io_control(
    IoControlCommand & command);

This function is used to execute an IO control command on the socket.

Parameters

command: The IO control command to be performed on the socket.

Exceptions

asio::system_error: Thrown on failure.

Example

Getting the number of bytes ready to read:

asio::ip::tcp::socket socket(my_context);
...
asio::ip::tcp::socket::bytes_readable command;
socket.io_control(command);
std::size_t bytes_readable = command.get();