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176
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]177<h1>Module memory
178 Methods</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]179<p class="navigation-index">[<a href="#AcquireAlignedMemory">AcquireAlignedMemory</a> &bull; <a href="#AcquireMagickMemory">AcquireMagickMemory</a> &bull; <a href="#AcquireQuantumMemory">AcquireQuantumMemory</a> &bull; <a href="#CopyMagickMemory">CopyMagickMemory</a> &bull; <a href="#GetMagickMemoryMethods">GetMagickMemoryMethods</a> &bull; <a href="#RelinquishAlignedMemory">RelinquishAlignedMemory</a> &bull; <a href="#RelinquishMagickMemory">RelinquishMagickMemory</a> &bull; <a href="#ResetMagickMemory">ResetMagickMemory</a> &bull; <a href="#ResizeMagickMemory">ResizeMagickMemory</a> &bull; <a href="#ResizeQuantumMemory">ResizeQuantumMemory</a> &bull; <a href="#SetMagickMemoryMethods">SetMagickMemoryMethods</a>]</p>
180
181<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
182_8c.html" target="source" name="AcquireAlignedMemory">AcquireAlignedMemory</a></h2>
183<div class="doc-section">
184
185<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p></ol>
186
187<p>The format of the AcquireAlignedMemory method is:</p>
188
189<pre class="code">
190 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
191</pre>
192
193<p>A description of each parameter follows:</p></ol>
194
195<h5>count</h5>
196<ol><p>the number of quantum elements to allocate.</p></ol>
197
198<h5>quantum</h5>
199<ol><p>the number of bytes in each quantum.</p></ol>
200
201 </div>
202<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
203_8c.html" target="source" name="AcquireMagickMemory">AcquireMagickMemory</a></h2>
204<div class="doc-section">
205
206<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p></ol>
207
208<p>The format of the AcquireMagickMemory method is:</p>
209
210<pre class="code">
211 void *AcquireMagickMemory(const size_t size)
212</pre>
213
214<p>A description of each parameter follows:</p></ol>
215
216<h5>size</h5>
217<ol><p>the size of the memory in bytes to allocate.</p></ol>
218
219 </div>
220<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
221_8c.html" target="source" name="AcquireQuantumMemory">AcquireQuantumMemory</a></h2>
222<div class="doc-section">
223
224<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p></ol>
225
226<p>The format of the AcquireQuantumMemory method is:</p>
227
228<pre class="code">
229 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
230</pre>
231
232<p>A description of each parameter follows:</p></ol>
233
234<h5>count</h5>
235<ol><p>the number of quantum elements to allocate.</p></ol>
236
237<h5>quantum</h5>
238<ol><p>the number of bytes in each quantum.</p></ol>
239
240 </div>
241<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
242_8c.html" target="source" name="CopyMagickMemory">CopyMagickMemory</a></h2>
243<div class="doc-section">
244
245<p>CopyMagickMemory() copies size bytes from memory area source to the destination. Copying between objects that overlap will take place correctly. It returns destination.</p></ol>
246
247<p>The format of the CopyMagickMemory method is:</p>
248
249<pre class="code">
250 void *CopyMagickMemory(void *destination,const void *source,
251 const size_t size)
252</pre>
253
254<p>A description of each parameter follows:</p></ol>
255
256<h5>destination</h5>
257<ol><p>the destination.</p></ol>
258
259<h5>source</h5>
260<ol><p>the source.</p></ol>
261
262<h5>size</h5>
263<ol><p>the size of the memory in bytes to allocate.</p></ol>
264
265 </div>
266<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
267_8c.html" target="source" name="GetMagickMemoryMethods">GetMagickMemoryMethods</a></h2>
268<div class="doc-section">
269
270<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p></ol>
271
272<p>The format of the GetMagickMemoryMethods() method is:</p>
273
274<pre class="code">
275 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
276 ResizeMemoryHandler *resize_memory_handler,
277 DestroyMemoryHandler *destroy_memory_handler)
278</pre>
279
280<p>A description of each parameter follows:</p></ol>
281
282<h5>acquire_memory_handler</h5>
283<ol><p>method to acquire memory (e.g. malloc).</p></ol>
284
285<h5>resize_memory_handler</h5>
286<ol><p>method to resize memory (e.g. realloc).</p></ol>
287
288<h5>destroy_memory_handler</h5>
289<ol><p>method to destroy memory (e.g. free).</p></ol>
290
291 </div>
292<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
293_8c.html" target="source" name="RelinquishAlignedMemory">RelinquishAlignedMemory</a></h2>
294<div class="doc-section">
295
296<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p></ol>
297
298<p>The format of the RelinquishAlignedMemory method is:</p>
299
300<pre class="code">
301 void *RelinquishAlignedMemory(void *memory)
302</pre>
303
304<p>A description of each parameter follows:</p></ol>
305
306<h5>memory</h5>
307<ol><p>A pointer to a block of memory to free for reuse.</p></ol>
308
309 </div>
310<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
311_8c.html" target="source" name="RelinquishMagickMemory">RelinquishMagickMemory</a></h2>
312<div class="doc-section">
313
314<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p></ol>
315
316<p>The format of the RelinquishMagickMemory method is:</p>
317
318<pre class="code">
319 void *RelinquishMagickMemory(void *memory)
320</pre>
321
322<p>A description of each parameter follows:</p></ol>
323
324<h5>memory</h5>
325<ol><p>A pointer to a block of memory to free for reuse.</p></ol>
326
327 </div>
328<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
329_8c.html" target="source" name="ResetMagickMemory">ResetMagickMemory</a></h2>
330<div class="doc-section">
331
332<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p></ol>
333
334<p>The format of the ResetMagickMemory method is:</p>
335
336<pre class="code">
337 void *ResetMagickMemory(void *memory,int byte,const size_t size)
338</pre>
339
340<p>A description of each parameter follows:</p></ol>
341
342<h5>memory</h5>
343<ol><p>A pointer to a memory allocation.</p></ol>
344
345<h5>byte</h5>
346<ol><p>Set the memory to this value.</p></ol>
347
348<h5>size</h5>
349<ol><p>Size of the memory to reset.</p></ol>
350
351 </div>
352<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
353_8c.html" target="source" name="ResizeMagickMemory">ResizeMagickMemory</a></h2>
354<div class="doc-section">
355
356<p>ResizeMagickMemory() changes the size of the memory and returns a pointer to the (possibly moved) block. The contents will be unchanged up to the lesser of the new and old sizes.</p></ol>
357
358<p>The format of the ResizeMagickMemory method is:</p>
359
360<pre class="code">
361 void *ResizeMagickMemory(void *memory,const size_t size)
362</pre>
363
364<p>A description of each parameter follows:</p></ol>
365
366<h5>memory</h5>
367<ol><p>A pointer to a memory allocation.</p></ol>
368
369<h5>size</h5>
370<ol><p>the new size of the allocated memory.</p></ol>
371
372 </div>
373<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
374_8c.html" target="source" name="ResizeQuantumMemory">ResizeQuantumMemory</a></h2>
375<div class="doc-section">
376
377<p>ResizeQuantumMemory() changes the size of the memory and returns a pointer to the (possibly moved) block. The contents will be unchanged up to the lesser of the new and old sizes.</p></ol>
378
379<p>The format of the ResizeQuantumMemory method is:</p>
380
381<pre class="code">
382 void *ResizeQuantumMemory(void *memory,const size_t count,
383 const size_t quantum)
384</pre>
385
386<p>A description of each parameter follows:</p></ol>
387
388<h5>memory</h5>
389<ol><p>A pointer to a memory allocation.</p></ol>
390
391<h5>count</h5>
392<ol><p>the number of quantum elements to allocate.</p></ol>
393
394<h5>quantum</h5>
395<ol><p>the number of bytes in each quantum.</p></ol>
396
397 </div>
398<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
399_8c.html" target="source" name="SetMagickMemoryMethods">SetMagickMemoryMethods</a></h2>
400<div class="doc-section">
401
402<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p></ol>
403
404<p>The format of the SetMagickMemoryMethods() method is:</p>
405
406<pre class="code">
407 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
408 ResizeMemoryHandler resize_memory_handler,
409 DestroyMemoryHandler destroy_memory_handler)
410</pre>
411
412<p>A description of each parameter follows:</p></ol>
413
414<h5>acquire_memory_handler</h5>
415<ol><p>method to acquire memory (e.g. malloc).</p></ol>
416
417<h5>resize_memory_handler</h5>
418<ol><p>method to resize memory (e.g. realloc).</p></ol>
419
420<h5>destroy_memory_handler</h5>
421<ol><p>method to destroy memory (e.g. free).</p></ol>
422
423 </div>
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