...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
IO control command to get the amount of data that can be read without blocking.
typedef implementation_defined bytes_readable;
Implements the FIONREAD IO control command.
boost::asio::posix::stream_descriptor descriptor(io_context); ... boost::asio::descriptor_base::bytes_readable command(true); descriptor.io_control(command); std::size_t bytes_readable = command.get();
Header: boost/asio/posix/descriptor.hpp
Convenience header: boost/asio.hpp