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195 <h1>Creating and destroying a memcached_st
<a class=
"headerlink" href=
"#creating-and-destroying-a-memcached-st" title=
"Permalink to this headline">¶
</a></h1>
196 <div class=
"section" id=
"synopsis">
197 <h2>SYNOPSIS
<a class=
"headerlink" href=
"#synopsis" title=
"Permalink to this headline">¶
</a></h2>
199 <dt>#include
<libmemcached/memcached.h
></dt><dd><p>Compile and link with -lmemcached
</p>
202 <dl class=
"cpp type">
203 <dt id=
"_CPPv412memcached_st">
204 <span id=
"_CPPv312memcached_st"></span><span id=
"_CPPv212memcached_st"></span><span id=
"memcached_st"></span><em class=
"property">typedef
</em><em class=
"property">struct
</em> <a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> <code class=
"sig-name descname">memcached_st
</code><a class=
"headerlink" href=
"#_CPPv412memcached_st" title=
"Permalink to this definition">¶
</a><br /></dt>
207 <dl class=
"cpp function">
208 <dt id=
"_CPPv416memcached_createP12memcached_st">
209 <span id=
"_CPPv316memcached_createP12memcached_st"></span><span id=
"_CPPv216memcached_createP12memcached_st"></span><span id=
"memcached_create__memcached_stP"></span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<code class=
"sig-name descname">memcached_create
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<em>ptr
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv416memcached_createP12memcached_st" title=
"Permalink to this definition">¶
</a><br /></dt>
210 <dd><dl class=
"field-list simple">
211 <dt class=
"field-odd">Parameters
</dt>
212 <dd class=
"field-odd"><p><strong>ptr
</strong> -- pointer to user-allocated
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct or null pointer
</p>
214 <dt class=
"field-even">Returns
</dt>
215 <dd class=
"field-even"><p>pointer to initialized
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct
</p>
220 <dl class=
"cpp function">
221 <dt id=
"_CPPv414memcached_freeP12memcached_st">
222 <span id=
"_CPPv314memcached_freeP12memcached_st"></span><span id=
"_CPPv214memcached_freeP12memcached_st"></span><span id=
"memcached_free__memcached_stP"></span>void
<code class=
"sig-name descname">memcached_free
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<em>ptr
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv414memcached_freeP12memcached_st" title=
"Permalink to this definition">¶
</a><br /></dt>
223 <dd><dl class=
"field-list simple">
224 <dt class=
"field-odd">Parameters
</dt>
225 <dd class=
"field-odd"><p><strong>ptr
</strong> -- pointer to initialized
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct to destroy and possibly free
</p>
230 <dl class=
"cpp function">
231 <dt id=
"_CPPv415memcached_cloneP12memcached_stP12memcached_st">
232 <span id=
"_CPPv315memcached_cloneP12memcached_stP12memcached_st"></span><span id=
"_CPPv215memcached_cloneP12memcached_stP12memcached_st"></span><span id=
"memcached_clone__memcached_stP.memcached_stP"></span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<code class=
"sig-name descname">memcached_clone
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<em>destination
</em>,
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<em>source
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"Permalink to this definition">¶
</a><br /></dt>
233 <dd><dl class=
"field-list simple">
234 <dt class=
"field-odd">Parameters
</dt>
235 <dd class=
"field-odd"><ul class=
"simple">
236 <li><p><strong>destination
</strong> -- pointer to user-allocated
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct or null pointer
</p></li>
237 <li><p><strong>source
</strong> -- pointer to initialized
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct to copy from
</p></li>
240 <dt class=
"field-even">Returns
</dt>
241 <dd class=
"field-even"><p>pointer to newly initialized
<a class=
"reference internal" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"memcached_clone::destination"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">destination
</span></code></a>, copied from
<a class=
"reference internal" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"memcached_clone::source"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">source
</span></code></a></p>
246 <dl class=
"cpp function">
247 <dt id=
"_CPPv423memcached_servers_resetP12memcached_st">
248 <span id=
"_CPPv323memcached_servers_resetP12memcached_st"></span><span id=
"_CPPv223memcached_servers_resetP12memcached_st"></span><span id=
"memcached_servers_reset__memcached_stP"></span>void
<code class=
"sig-name descname">memcached_servers_reset
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st">memcached_st
</a> *
<em>ptr
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#_CPPv423memcached_servers_resetP12memcached_st" title=
"Permalink to this definition">¶
</a><br /></dt>
249 <dd><dl class=
"field-list simple">
250 <dt class=
"field-odd">Parameters
</dt>
251 <dd class=
"field-odd"><p><strong>ptr
</strong> -- pointer to initialized
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> struct
</p>
257 <div class=
"section" id=
"description">
258 <h2>DESCRIPTION
<a class=
"headerlink" href=
"#description" title=
"Permalink to this headline">¶
</a></h2>
259 <p><a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a> is used to create a
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> structure that will then
260 be used by other
<code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">libmemcached
</span></code> functions to communicate with the server. You
261 should either pass a statically declared
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> to
<a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a> or
262 a NULL. If a NULL passed in then a structure is allocated for you.
</p>
263 <p>Please note, when you write new application use
<a class=
"reference internal" href=
"configuration.html#_CPPv49memcachedPKc6size_t" title=
"memcached"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached()
</span></code></a> over
264 <a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a>.
</p>
265 <p><a class=
"reference internal" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"memcached_clone"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_clone()
</span></code></a> is similar to
<a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a> but it copies the defaults
266 and list of servers from the source
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> pointer. If you pass a null
267 as the argument for the source to clone, it is the same as a call to
268 <a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a>. If the destination argument is NULL a
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> will be
269 allocated for you.
</p>
270 <p><a class=
"reference internal" href=
"#_CPPv423memcached_servers_resetP12memcached_st" title=
"memcached_servers_reset"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_servers_reset()
</span></code></a> allows you to zero out the list of servers that the
271 <a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> has.
</p>
272 <p>To clean up memory associated with a
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> structure you should pass it
273 to
<a class=
"reference internal" href=
"#_CPPv414memcached_freeP12memcached_st" title=
"memcached_free"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_free()
</span></code></a> when you are finished using it.
<a class=
"reference internal" href=
"#_CPPv414memcached_freeP12memcached_st" title=
"memcached_free"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_free()
</span></code></a> is the only
274 way to make sure all memory is deallocated when you finish using the structure.
</p>
275 <p>You may wish to avoid using
<a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a> or
<a class=
"reference internal" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"memcached_clone"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_clone()
</span></code></a> with a stack
276 based allocation. The most common issues related to ABI safety involve heap
277 allocated structures.
</p>
279 <div class=
"section" id=
"return-value">
280 <h2>RETURN VALUE
<a class=
"headerlink" href=
"#return-value" title=
"Permalink to this headline">¶
</a></h2>
281 <p><a class=
"reference internal" href=
"#_CPPv416memcached_createP12memcached_st" title=
"memcached_create"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_create()
</span></code></a> returns a pointer to the
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> that was created (or
282 initialized). On an allocation failure, it returns NULL.
</p>
283 <p><a class=
"reference internal" href=
"#_CPPv415memcached_cloneP12memcached_stP12memcached_st" title=
"memcached_clone"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_clone()
</span></code></a> returns a pointer to the
<a class=
"reference internal" href=
"#_CPPv412memcached_st" title=
"memcached_st"><code class=
"xref cpp cpp-any docutils literal notranslate"><span class=
"pre">memcached_st
</span></code></a> that was created (or
284 initialized). On an allocation failure, it returns NULL.
</p>
286 <div class=
"section" id=
"see-also">
287 <h2>SEE ALSO
<a class=
"headerlink" href=
"#see-also" title=
"Permalink to this headline">¶
</a></h2>
289 <li><p><em class=
"manpage"><a class=
"manpage reference external" href=
"https://linux.die.net/man/1/memcached">memcached(
1)
</a></em></p></li>
290 <li><p><a class=
"reference internal" href=
"../libmemcached.html"><span class=
"doc">C/C++ Client Library for memcached
</span></a></p></li>
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