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

Gets the non-blocking mode of the native socket implementation.

bool native_non_blocking(
    const implementation_type & impl) const;
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Sets the non-blocking mode of the native socket implementation.

boost::system::error_code native_non_blocking(
    implementation_type & impl,
    bool mode,
    boost::system::error_code & ec);
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