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213<div class="main">
214
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]215<h1>Module memory Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]216<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]217
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]218<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]219<div class="doc-section">
220
221<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
222
223<p>The format of the AcquireAlignedMemory method is:</p>
224
225<pre class="code">
226 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
227</pre>
228
229<p>A description of each parameter follows:</p>
230
231<h5>count</h5>
232<p>the number of quantum elements to allocate.</p>
233
234<h5>quantum</h5>
235<p>the number of bytes in each quantum.</p>
236
237 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]238<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]239<div class="doc-section">
240
241<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
242
243<p>The format of the AcquireMagickMemory method is:</p>
244
245<pre class="code">
246 void *AcquireMagickMemory(const size_t size)
247</pre>
248
249<p>A description of each parameter follows:</p>
250
251<h5>size</h5>
252<p>the size of the memory in bytes to allocate.</p>
253
254 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]255<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]256<div class="doc-section">
257
258<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
259
260<p>The format of the AcquireQuantumMemory method is:</p>
261
262<pre class="code">
263 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
264</pre>
265
266<p>A description of each parameter follows:</p>
267
268<h5>count</h5>
269<p>the number of quantum elements to allocate.</p>
270
271<h5>quantum</h5>
272<p>the number of bytes in each quantum.</p>
273
274 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]275<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]276<div class="doc-section">
277
278<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>
279
280<p>The format of the CopyMagickMemory method is:</p>
281
282<pre class="code">
283 void *CopyMagickMemory(void *destination,const void *source,
284 const size_t size)
285</pre>
286
287<p>A description of each parameter follows:</p>
288
289<h5>destination</h5>
290<p>the destination.</p>
291
292<h5>source</h5>
293<p>the source.</p>
294
295<h5>size</h5>
296<p>the size of the memory in bytes to allocate.</p>
297
298 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]299<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]300<div class="doc-section">
301
302<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
303
304<p>The format of the GetMagickMemoryMethods() method is:</p>
305
306<pre class="code">
307 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
308 ResizeMemoryHandler *resize_memory_handler,
309 DestroyMemoryHandler *destroy_memory_handler)
310</pre>
311
312<p>A description of each parameter follows:</p>
313
314<h5>acquire_memory_handler</h5>
315<p>method to acquire memory (e.g. malloc).</p>
316
317<h5>resize_memory_handler</h5>
318<p>method to resize memory (e.g. realloc).</p>
319
320<h5>destroy_memory_handler</h5>
321<p>method to destroy memory (e.g. free).</p>
322
323 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]324<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]325<div class="doc-section">
326
327<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
328
329<p>The format of the RelinquishAlignedMemory method is:</p>
330
331<pre class="code">
332 void *RelinquishAlignedMemory(void *memory)
333</pre>
334
335<p>A description of each parameter follows:</p>
336
337<h5>memory</h5>
338<p>A pointer to a block of memory to free for reuse.</p>
339
340 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]341<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]342<div class="doc-section">
343
344<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
345
346<p>The format of the RelinquishMagickMemory method is:</p>
347
348<pre class="code">
349 void *RelinquishMagickMemory(void *memory)
350</pre>
351
352<p>A description of each parameter follows:</p>
353
354<h5>memory</h5>
355<p>A pointer to a block of memory to free for reuse.</p>
356
357 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]358<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]359<div class="doc-section">
360
361<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
362
363<p>The format of the ResetMagickMemory method is:</p>
364
365<pre class="code">
366 void *ResetMagickMemory(void *memory,int byte,const size_t size)
367</pre>
368
369<p>A description of each parameter follows:</p>
370
371<h5>memory</h5>
372<p>A pointer to a memory allocation.</p>
373
374<h5>byte</h5>
375<p>Set the memory to this value.</p>
376
377<h5>size</h5>
378<p>Size of the memory to reset.</p>
379
380 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]381<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]382<div class="doc-section">
383
384<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>
385
386<p>The format of the ResizeMagickMemory method is:</p>
387
388<pre class="code">
389 void *ResizeMagickMemory(void *memory,const size_t size)
390</pre>
391
392<p>A description of each parameter follows:</p>
393
394<h5>memory</h5>
395<p>A pointer to a memory allocation.</p>
396
397<h5>size</h5>
398<p>the new size of the allocated memory.</p>
399
400 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]401<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]402<div class="doc-section">
403
404<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>
405
406<p>The format of the ResizeQuantumMemory method is:</p>
407
408<pre class="code">
409 void *ResizeQuantumMemory(void *memory,const size_t count,
410 const size_t quantum)
411</pre>
412
413<p>A description of each parameter follows:</p>
414
415<h5>memory</h5>
416<p>A pointer to a memory allocation.</p>
417
418<h5>count</h5>
419<p>the number of quantum elements to allocate.</p>
420
421<h5>quantum</h5>
422<p>the number of bytes in each quantum.</p>
423
424 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]425<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]426<div class="doc-section">
427
428<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
429
430<p>The format of the SetMagickMemoryMethods() method is:</p>
431
432<pre class="code">
433 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
434 ResizeMemoryHandler resize_memory_handler,
435 DestroyMemoryHandler destroy_memory_handler)
436</pre>
437
438<p>A description of each parameter follows:</p>
439
440<h5>acquire_memory_handler</h5>
441<p>method to acquire memory (e.g. malloc).</p>
442
443<h5>resize_memory_handler</h5>
444<p>method to resize memory (e.g. realloc).</p>
445
446<h5>destroy_memory_handler</h5>
447<p>method to destroy memory (e.g. free).</p>
448
449 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]450
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