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197 <h1>Update expiration on a key
<a class=
"headerlink" href=
"#update-expiration-on-a-key" title=
"Permalink to this headline">¶
</a></h1>
198 <div class=
"section" id=
"synopsis">
199 <span id=
"index-0"></span><h2>SYNOPSIS
<a class=
"headerlink" href=
"#synopsis" title=
"Permalink to this headline">¶
</a></h2>
200 <p>#include
<libmemcached/memcached.h
></p>
201 <dl class=
"cpp function">
202 <dt id=
"_CPPv415memcached_touchP12memcached_stPKc6size_t6time_t">
203 <span id=
"_CPPv315memcached_touchP12memcached_stPKc6size_t6time_t"></span><span id=
"_CPPv215memcached_touchP12memcached_stPKc6size_t6time_t"></span><span id=
"memcached_touch__memcached_stP.cCP.s.time_t"></span><a class=
"reference internal" href=
"memcached_return_t.html#_CPPv418memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_touch
</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>,
<em class=
"property">const
</em> char *
<em>key
</em>, size_t
<em>key_length
</em>, time_t
<em>expiration
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv415memcached_touchP12memcached_stPKc6size_t6time_t" title=
"Permalink to this definition">¶
</a><br /></dt>
206 <dl class=
"cpp function">
207 <dt id=
"_CPPv422memcached_touch_by_keyP12memcached_stPKc6size_tPKc6size_t6time_t">
208 <span id=
"_CPPv322memcached_touch_by_keyP12memcached_stPKc6size_tPKc6size_t6time_t"></span><span id=
"_CPPv222memcached_touch_by_keyP12memcached_stPKc6size_tPKc6size_t6time_t"></span><span id=
"memcached_touch_by_key__memcached_stP.cCP.s.cCP.s.time_t"></span><a class=
"reference internal" href=
"memcached_return_t.html#_CPPv418memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_touch_by_key
</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>,
<em class=
"property">const
</em> char *
<em>group_key
</em>, size_t
<em>group_key_length
</em>,
<em class=
"property">const
</em> char *
<em>key
</em>, size_t
<em>key_length
</em>, time_t
<em>expiration
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv422memcached_touch_by_keyP12memcached_stPKc6size_tPKc6size_t6time_t" title=
"Permalink to this definition">¶
</a><br /></dt>
211 <p>Compile and link with -lmemcached
</p>
213 <div class=
"section" id=
"description">
214 <h2>DESCRIPTION
<a class=
"headerlink" href=
"#description" title=
"Permalink to this headline">¶
</a></h2>
215 <p><a class=
"reference internal" href=
"#_CPPv415memcached_touchP12memcached_stPKc6size_t6time_t" title=
"memcached_touch"><code class=
"xref cpp cpp-func docutils literal notranslate"><span class=
"pre">memcached_touch()
</span></code></a> is used to update the expiration time on an existing key.
216 <a class=
"reference internal" href=
"#_CPPv422memcached_touch_by_keyP12memcached_stPKc6size_tPKc6size_t6time_t" title=
"memcached_touch_by_key"><code class=
"xref cpp cpp-func docutils literal notranslate"><span class=
"pre">memcached_touch_by_key()
</span></code></a> works the same, but it takes a master key
217 to find the given value.
</p>
219 <div class=
"section" id=
"return-value">
220 <h2>RETURN VALUE
<a class=
"headerlink" href=
"#return-value" title=
"Permalink to this headline">¶
</a></h2>
221 <p>A value of type
<a class=
"reference internal" href=
"memcached_return_t.html#_CPPv418memcached_return_t" title=
"memcached_return_t"><code class=
"xref cpp cpp-type docutils literal notranslate"><span class=
"pre">memcached_return_t
</span></code></a> is returned
222 On success that value will be
<a class=
"reference internal" href=
"memcached_return_t.html#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE" title=
"MEMCACHED_SUCCESS"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">MEMCACHED_SUCCESS
</span></code></a>.
223 Use
<a class=
"reference internal" href=
"memcached_strerror.html#_CPPv418memcached_strerrorP12memcached_st18memcached_return_t" title=
"memcached_strerror"><code class=
"xref cpp cpp-func docutils literal notranslate"><span class=
"pre">memcached_strerror()
</span></code></a> to translate this value to a printable
226 <div class=
"section" id=
"see-also">
227 <h2>SEE ALSO
<a class=
"headerlink" href=
"#see-also" title=
"Permalink to this headline">¶
</a></h2>
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