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#### io_context::run_one

Run the `io_context` object's event processing loop to execute at most one handler.

    count_type run_one();
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(Deprecated: Use non-error_code overlaod.) Run the `io_context` object's event processing loop to execute at most one handler.

    count_type run_one(
        boost::system::error_code & ec);
      » more...