docs/api-2.1/mempool_8h.html@d345541018fa
docs/api-2.1/mempool_8h.html
Sat, 06 Feb 2021 19:11:44 +0100
- author
- Mike Becker <universe@uap-core.de>
- date
- Sat, 06 Feb 2021 19:11:44 +0100
- changeset 390
- d345541018fa
- permissions
- -rw-r--r--
starts ucx 3.0 development
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71 <div class="headertitle">
72 <div class="title">mempool.h File Reference</div> </div>
73 </div><!--header-->
74 <div class="contents">
76 <p>Memory pool implementation.
77 <a href="#details">More...</a></p>
78 <div class="textblock"><code>#include "<a class="el" href="ucx_8h_source.html">ucx.h</a>"</code><br />
79 <code>#include "<a class="el" href="allocator_8h_source.html">allocator.h</a>"</code><br />
80 <code>#include <stddef.h></code><br />
81 </div>
82 <p><a href="mempool_8h_source.html">Go to the source code of this file.</a></p>
83 <table class="memberdecls">
84 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
85 Data Structures</h2></td></tr>
86 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structUcxMempool.html">UcxMempool</a></td></tr>
87 <tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">UCX mempool structure. <a href="structUcxMempool.html#details">More...</a><br /></td></tr>
88 <tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
89 </table><table class="memberdecls">
90 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
91 Macros</h2></td></tr>
92 <tr class="memitem:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a49f7bd1da5ac201d0cf54dc0f0d82dd2">ucx_mempool_new_default</a>()   <a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td></tr>
93 <tr class="memdesc:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="mdescLeft"> </td><td class="mdescRight">Shorthand for a new default memory pool with a capacity of 16 elements. <a href="#a49f7bd1da5ac201d0cf54dc0f0d82dd2">More...</a><br /></td></tr>
94 <tr class="separator:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="memSeparator" colspan="2"> </td></tr>
95 </table><table class="memberdecls">
96 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
97 Functions</h2></td></tr>
98 <tr class="memitem:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a> (size_t n)</td></tr>
99 <tr class="memdesc:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="mdescLeft"> </td><td class="mdescRight">Creates a memory pool with the specified initial size. <a href="#ad71cb8c3b6fdb30360376a8b372ef22a">More...</a><br /></td></tr>
100 <tr class="separator:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memSeparator" colspan="2"> </td></tr>
101 <tr class="memitem:aaf75b5016098723a9280531ccc3a6d77"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#aaf75b5016098723a9280531ccc3a6d77">ucx_mempool_chcap</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t newcap)</td></tr>
102 <tr class="memdesc:aaf75b5016098723a9280531ccc3a6d77"><td class="mdescLeft"> </td><td class="mdescRight">Resizes a memory pool. <a href="#aaf75b5016098723a9280531ccc3a6d77">More...</a><br /></td></tr>
103 <tr class="separator:aaf75b5016098723a9280531ccc3a6d77"><td class="memSeparator" colspan="2"> </td></tr>
104 <tr class="memitem:a2ae492b8f2878ccc9837ac213dced11e"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a2ae492b8f2878ccc9837ac213dced11e">ucx_mempool_malloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t n)</td></tr>
105 <tr class="memdesc:a2ae492b8f2878ccc9837ac213dced11e"><td class="mdescLeft"> </td><td class="mdescRight">Allocates pooled memory. <a href="#a2ae492b8f2878ccc9837ac213dced11e">More...</a><br /></td></tr>
106 <tr class="separator:a2ae492b8f2878ccc9837ac213dced11e"><td class="memSeparator" colspan="2"> </td></tr>
107 <tr class="memitem:a4b9142011824ae24f00fabe128417d69"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a4b9142011824ae24f00fabe128417d69">ucx_mempool_calloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t nelem, size_t elsize)</td></tr>
108 <tr class="memdesc:a4b9142011824ae24f00fabe128417d69"><td class="mdescLeft"> </td><td class="mdescRight">Allocates a pooled memory array. <a href="#a4b9142011824ae24f00fabe128417d69">More...</a><br /></td></tr>
109 <tr class="separator:a4b9142011824ae24f00fabe128417d69"><td class="memSeparator" colspan="2"> </td></tr>
110 <tr class="memitem:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a660ef42520ed6737c2e77aae18e3a7a4">ucx_mempool_realloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr, size_t n)</td></tr>
111 <tr class="memdesc:a660ef42520ed6737c2e77aae18e3a7a4"><td class="mdescLeft"> </td><td class="mdescRight">Reallocates pooled memory. <a href="#a660ef42520ed6737c2e77aae18e3a7a4">More...</a><br /></td></tr>
112 <tr class="separator:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memSeparator" colspan="2"> </td></tr>
113 <tr class="memitem:aefa26e3015f5aefadbfc74221bd246ac"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#aefa26e3015f5aefadbfc74221bd246ac">ucx_mempool_free</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr)</td></tr>
114 <tr class="memdesc:aefa26e3015f5aefadbfc74221bd246ac"><td class="mdescLeft"> </td><td class="mdescRight">Frees pooled memory. <a href="#aefa26e3015f5aefadbfc74221bd246ac">More...</a><br /></td></tr>
115 <tr class="separator:aefa26e3015f5aefadbfc74221bd246ac"><td class="memSeparator" colspan="2"> </td></tr>
116 <tr class="memitem:af096378da7e9bfbed3088497cf4c15bf"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#af096378da7e9bfbed3088497cf4c15bf">ucx_mempool_destroy</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool)</td></tr>
117 <tr class="memdesc:af096378da7e9bfbed3088497cf4c15bf"><td class="mdescLeft"> </td><td class="mdescRight">Destroys a memory pool. <a href="#af096378da7e9bfbed3088497cf4c15bf">More...</a><br /></td></tr>
118 <tr class="separator:af096378da7e9bfbed3088497cf4c15bf"><td class="memSeparator" colspan="2"> </td></tr>
119 <tr class="memitem:adb788e7ec24cd7dbdea6381539c549f2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2">ucx_mempool_set_destr</a> (void *ptr, <a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> func)</td></tr>
120 <tr class="memdesc:adb788e7ec24cd7dbdea6381539c549f2"><td class="mdescLeft"> </td><td class="mdescRight">Sets a destructor function for the specified memory. <a href="#adb788e7ec24cd7dbdea6381539c549f2">More...</a><br /></td></tr>
121 <tr class="separator:adb788e7ec24cd7dbdea6381539c549f2"><td class="memSeparator" colspan="2"> </td></tr>
122 <tr class="memitem:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#af47b6b7c40f8f263dc28cc9a4e77b27c">ucx_mempool_reg_destr</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr, <a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> destr)</td></tr>
123 <tr class="memdesc:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="mdescLeft"> </td><td class="mdescRight">Registers a destructor function for the specified (non-pooled) memory. <a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">More...</a><br /></td></tr>
124 <tr class="separator:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memSeparator" colspan="2"> </td></tr>
125 </table>
126 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
127 <div class="textblock"><p>Memory pool implementation. </p>
128 <dl class="section author"><dt>Author</dt><dd>Mike Becker </dd>
129 <dd>
130 Olaf Wintermann </dd></dl>
131 </div><h2 class="groupheader">Macro Definition Documentation</h2>
132 <a id="a49f7bd1da5ac201d0cf54dc0f0d82dd2"></a>
133 <h2 class="memtitle"><span class="permalink"><a href="#a49f7bd1da5ac201d0cf54dc0f0d82dd2">◆ </a></span>ucx_mempool_new_default</h2>
135 <div class="memitem">
136 <div class="memproto">
137 <table class="memname">
138 <tr>
139 <td class="memname">#define ucx_mempool_new_default</td>
140 <td>(</td>
141 <td class="paramname"></td><td>)</td>
142 <td>   <a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td>
143 </tr>
144 </table>
145 </div><div class="memdoc">
147 <p>Shorthand for a new default memory pool with a capacity of 16 elements. </p>
149 </div>
150 </div>
151 <h2 class="groupheader">Function Documentation</h2>
152 <a id="a4b9142011824ae24f00fabe128417d69"></a>
153 <h2 class="memtitle"><span class="permalink"><a href="#a4b9142011824ae24f00fabe128417d69">◆ </a></span>ucx_mempool_calloc()</h2>
155 <div class="memitem">
156 <div class="memproto">
157 <table class="memname">
158 <tr>
159 <td class="memname">void* ucx_mempool_calloc </td>
160 <td>(</td>
161 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
162 <td class="paramname"><em>pool</em>, </td>
163 </tr>
164 <tr>
165 <td class="paramkey"></td>
166 <td></td>
167 <td class="paramtype">size_t </td>
168 <td class="paramname"><em>nelem</em>, </td>
169 </tr>
170 <tr>
171 <td class="paramkey"></td>
172 <td></td>
173 <td class="paramtype">size_t </td>
174 <td class="paramname"><em>elsize</em> </td>
175 </tr>
176 <tr>
177 <td></td>
178 <td>)</td>
179 <td></td><td></td>
180 </tr>
181 </table>
182 </div><div class="memdoc">
184 <p>Allocates a pooled memory array. </p>
185 <p>The content of the allocated memory is set to zero.</p>
186 <dl class="params"><dt>Parameters</dt><dd>
187 <table class="params">
188 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
189 <tr><td class="paramname">nelem</td><td>amount of elements to allocate </td></tr>
190 <tr><td class="paramname">elsize</td><td>amount of memory per element </td></tr>
191 </table>
192 </dd>
193 </dl>
194 <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl>
195 <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a2c0aba4221c1ac6801f03ed799f15b12" title="A function pointer to the allocators calloc() function. ">ucx_allocator_calloc()</a> </dd></dl>
197 </div>
198 </div>
199 <a id="aaf75b5016098723a9280531ccc3a6d77"></a>
200 <h2 class="memtitle"><span class="permalink"><a href="#aaf75b5016098723a9280531ccc3a6d77">◆ </a></span>ucx_mempool_chcap()</h2>
202 <div class="memitem">
203 <div class="memproto">
204 <table class="memname">
205 <tr>
206 <td class="memname">int ucx_mempool_chcap </td>
207 <td>(</td>
208 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
209 <td class="paramname"><em>pool</em>, </td>
210 </tr>
211 <tr>
212 <td class="paramkey"></td>
213 <td></td>
214 <td class="paramtype">size_t </td>
215 <td class="paramname"><em>newcap</em> </td>
216 </tr>
217 <tr>
218 <td></td>
219 <td>)</td>
220 <td></td><td></td>
221 </tr>
222 </table>
223 </div><div class="memdoc">
225 <p>Resizes a memory pool. </p>
226 <p>This function will fail if the new capacity is not sufficient for the present data.</p>
227 <dl class="params"><dt>Parameters</dt><dd>
228 <table class="params">
229 <tr><td class="paramname">pool</td><td>the pool to resize </td></tr>
230 <tr><td class="paramname">newcap</td><td>the new capacity </td></tr>
231 </table>
232 </dd>
233 </dl>
234 <dl class="section return"><dt>Returns</dt><dd>zero on success or non-zero on failure </dd></dl>
236 </div>
237 </div>
238 <a id="af096378da7e9bfbed3088497cf4c15bf"></a>
239 <h2 class="memtitle"><span class="permalink"><a href="#af096378da7e9bfbed3088497cf4c15bf">◆ </a></span>ucx_mempool_destroy()</h2>
241 <div class="memitem">
242 <div class="memproto">
243 <table class="memname">
244 <tr>
245 <td class="memname">void ucx_mempool_destroy </td>
246 <td>(</td>
247 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
248 <td class="paramname"><em>pool</em></td><td>)</td>
249 <td></td>
250 </tr>
251 </table>
252 </div><div class="memdoc">
254 <p>Destroys a memory pool. </p>
255 <p>For each element the destructor function (if any) is called and the element is freed.</p>
256 <p>Each of the registered destructor function that has no corresponding element within the pool (namely those registered by ucx_mempool_reg_destr) is called interleaving with the element destruction, but with guarantee to the order in which they were registered (FIFO order).</p>
257 <dl class="params"><dt>Parameters</dt><dd>
258 <table class="params">
259 <tr><td class="paramname">pool</td><td>the mempool to destroy </td></tr>
260 </table>
261 </dd>
262 </dl>
264 </div>
265 </div>
266 <a id="aefa26e3015f5aefadbfc74221bd246ac"></a>
267 <h2 class="memtitle"><span class="permalink"><a href="#aefa26e3015f5aefadbfc74221bd246ac">◆ </a></span>ucx_mempool_free()</h2>
269 <div class="memitem">
270 <div class="memproto">
271 <table class="memname">
272 <tr>
273 <td class="memname">void ucx_mempool_free </td>
274 <td>(</td>
275 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
276 <td class="paramname"><em>pool</em>, </td>
277 </tr>
278 <tr>
279 <td class="paramkey"></td>
280 <td></td>
281 <td class="paramtype">void * </td>
282 <td class="paramname"><em>ptr</em> </td>
283 </tr>
284 <tr>
285 <td></td>
286 <td>)</td>
287 <td></td><td></td>
288 </tr>
289 </table>
290 </div><div class="memdoc">
292 <p>Frees pooled memory. </p>
293 <p>Before freeing the memory, the specified destructor function (if any) is called.</p>
294 <p>If you specify memory, that is not pooled by the specified memory pool, the program will terminate with a call to <code>abort()</code>.</p>
295 <dl class="params"><dt>Parameters</dt><dd>
296 <table class="params">
297 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
298 <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be freed </td></tr>
299 </table>
300 </dd>
301 </dl>
302 <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2" title="Sets a destructor function for the specified memory. ">ucx_mempool_set_destr()</a> </dd></dl>
304 </div>
305 </div>
306 <a id="a2ae492b8f2878ccc9837ac213dced11e"></a>
307 <h2 class="memtitle"><span class="permalink"><a href="#a2ae492b8f2878ccc9837ac213dced11e">◆ </a></span>ucx_mempool_malloc()</h2>
309 <div class="memitem">
310 <div class="memproto">
311 <table class="memname">
312 <tr>
313 <td class="memname">void* ucx_mempool_malloc </td>
314 <td>(</td>
315 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
316 <td class="paramname"><em>pool</em>, </td>
317 </tr>
318 <tr>
319 <td class="paramkey"></td>
320 <td></td>
321 <td class="paramtype">size_t </td>
322 <td class="paramname"><em>n</em> </td>
323 </tr>
324 <tr>
325 <td></td>
326 <td>)</td>
327 <td></td><td></td>
328 </tr>
329 </table>
330 </div><div class="memdoc">
332 <p>Allocates pooled memory. </p>
333 <dl class="params"><dt>Parameters</dt><dd>
334 <table class="params">
335 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
336 <tr><td class="paramname">n</td><td>amount of memory to allocate </td></tr>
337 </table>
338 </dd>
339 </dl>
340 <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl>
341 <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a29f0f6a23a70db3b60635cd6dc384473" title="A function pointer to the allocators malloc() function. ">ucx_allocator_malloc()</a> </dd></dl>
343 </div>
344 </div>
345 <a id="ad71cb8c3b6fdb30360376a8b372ef22a"></a>
346 <h2 class="memtitle"><span class="permalink"><a href="#ad71cb8c3b6fdb30360376a8b372ef22a">◆ </a></span>ucx_mempool_new()</h2>
348 <div class="memitem">
349 <div class="memproto">
350 <table class="memname">
351 <tr>
352 <td class="memname"><a class="el" href="structUcxMempool.html">UcxMempool</a>* ucx_mempool_new </td>
353 <td>(</td>
354 <td class="paramtype">size_t </td>
355 <td class="paramname"><em>n</em></td><td>)</td>
356 <td></td>
357 </tr>
358 </table>
359 </div><div class="memdoc">
361 <p>Creates a memory pool with the specified initial size. </p>
362 <p>As the created memory pool automatically grows in size by factor two when trying to allocate memory on a full pool, it is recommended that you use a power of two for the initial size.</p>
363 <dl class="params"><dt>Parameters</dt><dd>
364 <table class="params">
365 <tr><td class="paramname">n</td><td>initial pool size (should be a power of two, e.g. 16) </td></tr>
366 </table>
367 </dd>
368 </dl>
369 <dl class="section return"><dt>Returns</dt><dd>a pointer to the new memory pool </dd></dl>
370 <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#a49f7bd1da5ac201d0cf54dc0f0d82dd2" title="Shorthand for a new default memory pool with a capacity of 16 elements. ">ucx_mempool_new_default()</a> </dd></dl>
372 </div>
373 </div>
374 <a id="a660ef42520ed6737c2e77aae18e3a7a4"></a>
375 <h2 class="memtitle"><span class="permalink"><a href="#a660ef42520ed6737c2e77aae18e3a7a4">◆ </a></span>ucx_mempool_realloc()</h2>
377 <div class="memitem">
378 <div class="memproto">
379 <table class="memname">
380 <tr>
381 <td class="memname">void* ucx_mempool_realloc </td>
382 <td>(</td>
383 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
384 <td class="paramname"><em>pool</em>, </td>
385 </tr>
386 <tr>
387 <td class="paramkey"></td>
388 <td></td>
389 <td class="paramtype">void * </td>
390 <td class="paramname"><em>ptr</em>, </td>
391 </tr>
392 <tr>
393 <td class="paramkey"></td>
394 <td></td>
395 <td class="paramtype">size_t </td>
396 <td class="paramname"><em>n</em> </td>
397 </tr>
398 <tr>
399 <td></td>
400 <td>)</td>
401 <td></td><td></td>
402 </tr>
403 </table>
404 </div><div class="memdoc">
406 <p>Reallocates pooled memory. </p>
407 <p>If the memory to be reallocated is not contained by the specified pool, the behavior is undefined.</p>
408 <dl class="params"><dt>Parameters</dt><dd>
409 <table class="params">
410 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
411 <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be reallocated </td></tr>
412 <tr><td class="paramname">n</td><td>the new size of the memory </td></tr>
413 </table>
414 </dd>
415 </dl>
416 <dl class="section return"><dt>Returns</dt><dd>a pointer to the new location of the memory </dd></dl>
417 <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a6d7cf038a806e327c5da37321d04e426" title="A function pointer to the allocators realloc() function. ">ucx_allocator_realloc()</a> </dd></dl>
419 </div>
420 </div>
421 <a id="af47b6b7c40f8f263dc28cc9a4e77b27c"></a>
422 <h2 class="memtitle"><span class="permalink"><a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">◆ </a></span>ucx_mempool_reg_destr()</h2>
424 <div class="memitem">
425 <div class="memproto">
426 <table class="memname">
427 <tr>
428 <td class="memname">void ucx_mempool_reg_destr </td>
429 <td>(</td>
430 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td>
431 <td class="paramname"><em>pool</em>, </td>
432 </tr>
433 <tr>
434 <td class="paramkey"></td>
435 <td></td>
436 <td class="paramtype">void * </td>
437 <td class="paramname"><em>ptr</em>, </td>
438 </tr>
439 <tr>
440 <td class="paramkey"></td>
441 <td></td>
442 <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> </td>
443 <td class="paramname"><em>destr</em> </td>
444 </tr>
445 <tr>
446 <td></td>
447 <td>)</td>
448 <td></td><td></td>
449 </tr>
450 </table>
451 </div><div class="memdoc">
453 <p>Registers a destructor function for the specified (non-pooled) memory. </p>
454 <p>This is useful, if you have memory that has not been allocated by a mempool, but shall be managed by a mempool.</p>
455 <p>This function creates an entry in the specified mempool and the memory will therefore (logically) convert to pooled memory. <b>However, this does not cause the memory to be freed automatically!</b>. If you want to use this function, make the memory pool free non-pooled memory, the specified destructor function must call <code>free()</code> by itself. But keep in mind, that you then MUST NOT use this destructor function with pooled memory (e.g. in <a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2" title="Sets a destructor function for the specified memory. ">ucx_mempool_set_destr()</a>), as it would cause a double-free.</p>
456 <dl class="params"><dt>Parameters</dt><dd>
457 <table class="params">
458 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
459 <tr><td class="paramname">ptr</td><td>data the destructor is registered for </td></tr>
460 <tr><td class="paramname">destr</td><td>a pointer to the destructor function </td></tr>
461 </table>
462 </dd>
463 </dl>
465 </div>
466 </div>
467 <a id="adb788e7ec24cd7dbdea6381539c549f2"></a>
468 <h2 class="memtitle"><span class="permalink"><a href="#adb788e7ec24cd7dbdea6381539c549f2">◆ </a></span>ucx_mempool_set_destr()</h2>
470 <div class="memitem">
471 <div class="memproto">
472 <table class="memname">
473 <tr>
474 <td class="memname">void ucx_mempool_set_destr </td>
475 <td>(</td>
476 <td class="paramtype">void * </td>
477 <td class="paramname"><em>ptr</em>, </td>
478 </tr>
479 <tr>
480 <td class="paramkey"></td>
481 <td></td>
482 <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> </td>
483 <td class="paramname"><em>func</em> </td>
484 </tr>
485 <tr>
486 <td></td>
487 <td>)</td>
488 <td></td><td></td>
489 </tr>
490 </table>
491 </div><div class="memdoc">
493 <p>Sets a destructor function for the specified memory. </p>
494 <p>The destructor is automatically called when the memory is freed or the pool is destroyed. A destructor for pooled memory <b>MUST NOT</b> free the memory itself, as this is done by the pool. Use a destructor to free any resources managed by the pooled object.</p>
495 <p>The only requirement for the specified memory is, that it <b>MUST</b> be pooled memory by a <a class="el" href="structUcxMempool.html" title="UCX mempool structure. ">UcxMempool</a> or an element-compatible mempool. The pointer to the destructor function is saved in a reserved area before the actual memory.</p>
496 <dl class="params"><dt>Parameters</dt><dd>
497 <table class="params">
498 <tr><td class="paramname">ptr</td><td>pooled memory </td></tr>
499 <tr><td class="paramname">func</td><td>a pointer to the destructor function </td></tr>
500 </table>
501 </dd>
502 </dl>
503 <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#aefa26e3015f5aefadbfc74221bd246ac" title="Frees pooled memory. ">ucx_mempool_free()</a> </dd>
504 <dd>
505 <a class="el" href="mempool_8h.html#af096378da7e9bfbed3088497cf4c15bf" title="Destroys a memory pool. ">ucx_mempool_destroy()</a> </dd></dl>
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