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175
176<div class="main">
177
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]178<h1>Module memory
179 Methods</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]180<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>
181
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]182<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
183_8c.html" id="AcquireAlignedMemory">AcquireAlignedMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]184<div class="doc-section">
185
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]186<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]187
188<p>The format of the AcquireAlignedMemory method is:</p>
189
190<pre class="code">
191 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
192</pre>
193
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]194<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]195
196<h5>count</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]197<p>the number of quantum elements to allocate.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]198
199<h5>quantum</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]200<p>the number of bytes in each quantum.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]201
202 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]203<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
204_8c.html" id="AcquireMagickMemory">AcquireMagickMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]205<div class="doc-section">
206
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]207<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]208
209<p>The format of the AcquireMagickMemory method is:</p>
210
211<pre class="code">
212 void *AcquireMagickMemory(const size_t size)
213</pre>
214
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]215<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]216
217<h5>size</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]218<p>the size of the memory in bytes to allocate.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]219
220 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]221<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
222_8c.html" id="AcquireQuantumMemory">AcquireQuantumMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]223<div class="doc-section">
224
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]225<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]226
227<p>The format of the AcquireQuantumMemory method is:</p>
228
229<pre class="code">
230 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
231</pre>
232
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]233<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]234
235<h5>count</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]236<p>the number of quantum elements to allocate.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]237
238<h5>quantum</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]239<p>the number of bytes in each quantum.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]240
241 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]242<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
243_8c.html" id="CopyMagickMemory">CopyMagickMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]244<div class="doc-section">
245
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]246<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>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]247
248<p>The format of the CopyMagickMemory method is:</p>
249
250<pre class="code">
251 void *CopyMagickMemory(void *destination,const void *source,
252 const size_t size)
253</pre>
254
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]255<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]256
257<h5>destination</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]258<p>the destination.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]259
260<h5>source</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]261<p>the source.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]262
263<h5>size</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]264<p>the size of the memory in bytes to allocate.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]265
266 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]267<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
268_8c.html" id="GetMagickMemoryMethods">GetMagickMemoryMethods</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]269<div class="doc-section">
270
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]271<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]272
273<p>The format of the GetMagickMemoryMethods() method is:</p>
274
275<pre class="code">
276 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
277 ResizeMemoryHandler *resize_memory_handler,
278 DestroyMemoryHandler *destroy_memory_handler)
279</pre>
280
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]281<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]282
283<h5>acquire_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]284<p>method to acquire memory (e.g. malloc).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]285
286<h5>resize_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]287<p>method to resize memory (e.g. realloc).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]288
289<h5>destroy_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]290<p>method to destroy memory (e.g. free).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]291
292 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]293<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
294_8c.html" id="RelinquishAlignedMemory">RelinquishAlignedMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]295<div class="doc-section">
296
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]297<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]298
299<p>The format of the RelinquishAlignedMemory method is:</p>
300
301<pre class="code">
302 void *RelinquishAlignedMemory(void *memory)
303</pre>
304
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]305<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]306
307<h5>memory</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]308<p>A pointer to a block of memory to free for reuse.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]309
310 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]311<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
312_8c.html" id="RelinquishMagickMemory">RelinquishMagickMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]313<div class="doc-section">
314
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]315<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]316
317<p>The format of the RelinquishMagickMemory method is:</p>
318
319<pre class="code">
320 void *RelinquishMagickMemory(void *memory)
321</pre>
322
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]323<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]324
325<h5>memory</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]326<p>A pointer to a block of memory to free for reuse.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]327
328 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]329<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
330_8c.html" id="ResetMagickMemory">ResetMagickMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]331<div class="doc-section">
332
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]333<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]334
335<p>The format of the ResetMagickMemory method is:</p>
336
337<pre class="code">
338 void *ResetMagickMemory(void *memory,int byte,const size_t size)
339</pre>
340
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]341<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]342
343<h5>memory</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]344<p>A pointer to a memory allocation.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]345
346<h5>byte</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]347<p>Set the memory to this value.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]348
349<h5>size</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]350<p>Size of the memory to reset.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]351
352 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]353<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
354_8c.html" id="ResizeMagickMemory">ResizeMagickMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]355<div class="doc-section">
356
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]357<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>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]358
359<p>The format of the ResizeMagickMemory method is:</p>
360
361<pre class="code">
362 void *ResizeMagickMemory(void *memory,const size_t size)
363</pre>
364
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]365<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]366
367<h5>memory</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]368<p>A pointer to a memory allocation.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]369
370<h5>size</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]371<p>the new size of the allocated memory.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]372
373 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]374<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
375_8c.html" id="ResizeQuantumMemory">ResizeQuantumMemory</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]376<div class="doc-section">
377
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]378<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>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]379
380<p>The format of the ResizeQuantumMemory method is:</p>
381
382<pre class="code">
383 void *ResizeQuantumMemory(void *memory,const size_t count,
384 const size_t quantum)
385</pre>
386
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]387<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]388
389<h5>memory</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]390<p>A pointer to a memory allocation.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]391
392<h5>count</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]393<p>the number of quantum elements to allocate.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]394
395<h5>quantum</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]396<p>the number of bytes in each quantum.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]397
398 </div>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]399<h2><a href="http://www.wizards-toolkit.org/api/MagickCore/memory
400_8c.html" id="SetMagickMemoryMethods">SetMagickMemoryMethods</a></h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]401<div class="doc-section">
402
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]403<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]404
405<p>The format of the SetMagickMemoryMethods() method is:</p>
406
407<pre class="code">
408 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
409 ResizeMemoryHandler resize_memory_handler,
410 DestroyMemoryHandler destroy_memory_handler)
411</pre>
412
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]413<p>A description of each parameter follows:</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]414
415<h5>acquire_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]416<p>method to acquire memory (e.g. malloc).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]417
418<h5>resize_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]419<p>method to resize memory (e.g. realloc).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]420
421<h5>destroy_memory_handler</h5>
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame^]422<p>method to destroy memory (e.g. free).</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]423
424 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]425
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