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199</div>
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205
206<div class="main">
207
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]208<h1>Module memory Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]209<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>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]210
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]211<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireAlignedMemory">AcquireAlignedMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]212<div class="doc-section">
213
214<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
215
216<p>The format of the AcquireAlignedMemory method is:</p>
217
218<pre class="code">
219 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
220</pre>
221
222<p>A description of each parameter follows:</p>
223
224<h5>count</h5>
225<p>the number of quantum elements to allocate.</p>
226
227<h5>quantum</h5>
228<p>the number of bytes in each quantum.</p>
229
230 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]231<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireMagickMemory">AcquireMagickMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]232<div class="doc-section">
233
234<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
235
236<p>The format of the AcquireMagickMemory method is:</p>
237
238<pre class="code">
239 void *AcquireMagickMemory(const size_t size)
240</pre>
241
242<p>A description of each parameter follows:</p>
243
244<h5>size</h5>
245<p>the size of the memory in bytes to allocate.</p>
246
247 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]248<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireQuantumMemory">AcquireQuantumMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]249<div class="doc-section">
250
251<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
252
253<p>The format of the AcquireQuantumMemory method is:</p>
254
255<pre class="code">
256 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
257</pre>
258
259<p>A description of each parameter follows:</p>
260
261<h5>count</h5>
262<p>the number of quantum elements to allocate.</p>
263
264<h5>quantum</h5>
265<p>the number of bytes in each quantum.</p>
266
267 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]268<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="CopyMagickMemory">CopyMagickMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]269<div class="doc-section">
270
271<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>
272
273<p>The format of the CopyMagickMemory method is:</p>
274
275<pre class="code">
276 void *CopyMagickMemory(void *destination,const void *source,
277 const size_t size)
278</pre>
279
280<p>A description of each parameter follows:</p>
281
282<h5>destination</h5>
283<p>the destination.</p>
284
285<h5>source</h5>
286<p>the source.</p>
287
288<h5>size</h5>
289<p>the size of the memory in bytes to allocate.</p>
290
291 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]292<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="GetMagickMemoryMethods">GetMagickMemoryMethods</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]293<div class="doc-section">
294
295<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
296
297<p>The format of the GetMagickMemoryMethods() method is:</p>
298
299<pre class="code">
300 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
301 ResizeMemoryHandler *resize_memory_handler,
302 DestroyMemoryHandler *destroy_memory_handler)
303</pre>
304
305<p>A description of each parameter follows:</p>
306
307<h5>acquire_memory_handler</h5>
308<p>method to acquire memory (e.g. malloc).</p>
309
310<h5>resize_memory_handler</h5>
311<p>method to resize memory (e.g. realloc).</p>
312
313<h5>destroy_memory_handler</h5>
314<p>method to destroy memory (e.g. free).</p>
315
316 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]317<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="RelinquishAlignedMemory">RelinquishAlignedMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]318<div class="doc-section">
319
320<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
321
322<p>The format of the RelinquishAlignedMemory method is:</p>
323
324<pre class="code">
325 void *RelinquishAlignedMemory(void *memory)
326</pre>
327
328<p>A description of each parameter follows:</p>
329
330<h5>memory</h5>
331<p>A pointer to a block of memory to free for reuse.</p>
332
333 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]334<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="RelinquishMagickMemory">RelinquishMagickMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]335<div class="doc-section">
336
337<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
338
339<p>The format of the RelinquishMagickMemory method is:</p>
340
341<pre class="code">
342 void *RelinquishMagickMemory(void *memory)
343</pre>
344
345<p>A description of each parameter follows:</p>
346
347<h5>memory</h5>
348<p>A pointer to a block of memory to free for reuse.</p>
349
350 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]351<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResetMagickMemory">ResetMagickMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]352<div class="doc-section">
353
354<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
355
356<p>The format of the ResetMagickMemory method is:</p>
357
358<pre class="code">
359 void *ResetMagickMemory(void *memory,int byte,const size_t size)
360</pre>
361
362<p>A description of each parameter follows:</p>
363
364<h5>memory</h5>
365<p>A pointer to a memory allocation.</p>
366
367<h5>byte</h5>
368<p>Set the memory to this value.</p>
369
370<h5>size</h5>
371<p>Size of the memory to reset.</p>
372
373 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]374<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResizeMagickMemory">ResizeMagickMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]375<div class="doc-section">
376
377<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>
378
379<p>The format of the ResizeMagickMemory method is:</p>
380
381<pre class="code">
382 void *ResizeMagickMemory(void *memory,const size_t size)
383</pre>
384
385<p>A description of each parameter follows:</p>
386
387<h5>memory</h5>
388<p>A pointer to a memory allocation.</p>
389
390<h5>size</h5>
391<p>the new size of the allocated memory.</p>
392
393 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]394<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResizeQuantumMemory">ResizeQuantumMemory</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]395<div class="doc-section">
396
397<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>
398
399<p>The format of the ResizeQuantumMemory method is:</p>
400
401<pre class="code">
402 void *ResizeQuantumMemory(void *memory,const size_t count,
403 const size_t quantum)
404</pre>
405
406<p>A description of each parameter follows:</p>
407
408<h5>memory</h5>
409<p>A pointer to a memory allocation.</p>
410
411<h5>count</h5>
412<p>the number of quantum elements to allocate.</p>
413
414<h5>quantum</h5>
415<p>the number of bytes in each quantum.</p>
416
417 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]418<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="SetMagickMemoryMethods">SetMagickMemoryMethods</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]419<div class="doc-section">
420
421<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
422
423<p>The format of the SetMagickMemoryMethods() method is:</p>
424
425<pre class="code">
426 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
427 ResizeMemoryHandler resize_memory_handler,
428 DestroyMemoryHandler destroy_memory_handler)
429</pre>
430
431<p>A description of each parameter follows:</p>
432
433<h5>acquire_memory_handler</h5>
434<p>method to acquire memory (e.g. malloc).</p>
435
436<h5>resize_memory_handler</h5>
437<p>method to resize memory (e.g. realloc).</p>
438
439<h5>destroy_memory_handler</h5>
440<p>method to destroy memory (e.g. free).</p>
441
442 </div>
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