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 191   <div class="section" id="storing-custom-information-in-the-client">
 192 <h1>Storing custom information in the client<a class="headerlink" href="#storing-custom-information-in-the-client" title="Permalink to this headline">¶</a></h1>
 193 <div class="section" id="synopsis">
 194 <h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
 195 <dl class="docutils">
 196 <dt>#include &lt;libmemcached/memcached.h&gt;</dt>
 197 <dd>Compile and link with -lmemcached</dd>
 198 </dl>
 199 <dl class="function">
 200 <dt id="_CPPv423memcached_get_user_dataP12memcached_st">
 201 <span id="_CPPv323memcached_get_user_dataP12memcached_st"></span><span id="_CPPv223memcached_get_user_dataP12memcached_st"></span><span id="memcached_get_user_data__memcached_stP"></span>void *<code class="descname">memcached_get_user_data</code><span class="sig-paren">(</span><a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st">memcached_st</a> *<em>ptr</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv423memcached_get_user_dataP12memcached_st" title="Permalink to this definition">¶</a><br /></dt>
 202 <dd><table class="docutils field-list" frame="void" rules="none">
 203 <col class="field-name" />
 204 <col class="field-body" />
 205 <tbody valign="top">
 206 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>ptr</strong> -- pointer to initialized <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> struct</td>
 207 </tr>
 208 <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body">opaque pointer to the user supplied data</td>
 209 </tr>
 210 </tbody>
 211 </table>
 212 </dd></dl>
 213
 214 <dl class="function">
 215 <dt id="_CPPv423memcached_set_user_dataP12memcached_stPv">
 216 <span id="_CPPv323memcached_set_user_dataP12memcached_stPv"></span><span id="_CPPv223memcached_set_user_dataP12memcached_stPv"></span><span id="memcached_set_user_data__memcached_stP.voidP"></span>void *<code class="descname">memcached_set_user_data</code><span class="sig-paren">(</span><a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st">memcached_st</a> *<em>ptr</em>, void *<em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv423memcached_set_user_dataP12memcached_stPv" title="Permalink to this definition">¶</a><br /></dt>
 217 <dd><table class="docutils field-list" frame="void" rules="none">
 218 <col class="field-name" />
 219 <col class="field-body" />
 220 <tbody valign="top">
 221 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
 222 <li><strong>ptr</strong> -- pointer to initialized <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> struct</li>
 223 <li><strong>data</strong> -- opaque pointer to user supplied data</li>
 224 </ul>
 225 </td>
 226 </tr>
 227 <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">opaque pointer to the previously set <a class="reference internal" href="#_CPPv423memcached_set_user_dataP12memcached_stPv" title="memcached_set_user_data::data"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">data</span></code></a></p>
 228 </td>
 229 </tr>
 230 </tbody>
 231 </table>
 232 </dd></dl>
 233
 234 </div>
 235 <div class="section" id="description">
 236 <h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
 237 <p><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> allows you to store a pointer to a user specific data inside
 238 the memcached_st structure.</p>
 239 <p><a class="reference internal" href="#_CPPv423memcached_set_user_dataP12memcached_stPv" title="memcached_set_user_data"><code class="xref cpp cpp-func docutils literal notranslate"><span class="pre">memcached_set_user_data()</span></code></a> is used to set the user specific data in the
 240 <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-type docutils literal notranslate"><span class="pre">memcached_st</span></code></a> structure.</p>
 241 <p><a class="reference internal" href="#_CPPv423memcached_get_user_dataP12memcached_st" title="memcached_get_user_data"><code class="xref cpp cpp-func docutils literal notranslate"><span class="pre">memcached_get_user_data()</span></code></a> is used to retrieve the user specific data in
 242 the <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-type docutils literal notranslate"><span class="pre">memcached_st</span></code></a> structure.</p>
 243 </div>
 244 <div class="section" id="return-value">
 245 <h2>RETURN VALUE<a class="headerlink" href="#return-value" title="Permalink to this headline">¶</a></h2>
 246 <p><a class="reference internal" href="#_CPPv423memcached_set_user_dataP12memcached_stPv" title="memcached_set_user_data"><code class="xref cpp cpp-func docutils literal notranslate"><span class="pre">memcached_set_user_data()</span></code></a> returns the previous value of the user specific data.</p>
 247 <p><a class="reference internal" href="#_CPPv423memcached_get_user_dataP12memcached_st" title="memcached_get_user_data"><code class="xref cpp cpp-func docutils literal notranslate"><span class="pre">memcached_get_user_data()</span></code></a> returns the current value of the user specific data.</p>
 248 </div>
 249 <div class="section" id="see-also">
 250 <h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
 251 <ul class="simple">
 252 <li><em class="manpage"><a class="manpage reference external" href="https://linux.die.net/man/1/memcached">memcached(1)</a></em></li>
 253 <li><a class="reference internal" href="../libmemcached.html"><span class="doc">C/C++ Client Library for memcached</span></a></li>
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