Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

io_context::basic_executor_type::query (1 of 2 overloads)

Query the current value of the mapping property.

static constexpr execution::mapping_t query(
    execution::mapping_t );

Do not call this function directly. It is intended for use with the query customisation point.

For example:

auto ex = my_io_context.get_executor();
if (boost::asio::query(ex, boost::asio::execution::mapping)
      == boost::asio::execution::mapping.thread)
  ...