Boost C++ Libraries

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posix::basic_stream_descriptor::io_control (1 of 2 overloads)

Inherited from posix::basic_descriptor.

Perform an IO control command on the descriptor.

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

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

Parameters

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

Exceptions

boost::system::system_error: Thrown on failure.

Example

Getting the number of bytes ready to read:

boost::asio::posix::stream_descriptor descriptor(my_context);
...
boost::asio::posix::stream_descriptor::bytes_readable command;
descriptor.io_control(command);
std::size_t bytes_readable = command.get();