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<p>Returns the underlying OS-specific permissions. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="idm46093042817296-bb"></a><span class="identifier">set_default</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Sets the default permissions, which are equivalent to <code class="computeroutput">NULL</code> <code class="computeroutput">SECURITY_ATTRIBUTES</