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

Checks whether the server is alive.

template<
    class CompletionToken>
auto
async_ping(
    CompletionToken&& token);
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Checks whether the server is alive.

template<
    class CompletionToken>
auto
async_ping(
    diagnostics& diag,
    CompletionToken&& token);
  » more...