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216<div class="main">
217
cristy20398432011-08-11 01:31:50 +0000[diff] [blame^]218<h1>Module memory Methods</h1>
219<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>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]220
cristy20398432011-08-11 01:31:50 +0000[diff] [blame^]221<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireAlignedMemory">AcquireAlignedMemory</a></h2>
222<div class="doc-section">
223
224<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
225
226<p>The format of the AcquireAlignedMemory method is:</p>
227
228<pre class="code">
229 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
230</pre>
231
232<p>A description of each parameter follows:</p>
233
234<h5>count</h5>
235<p>the number of quantum elements to allocate.</p>
236
237<h5>quantum</h5>
238<p>the number of bytes in each quantum.</p>
239
240 </div>
241<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireMagickMemory">AcquireMagickMemory</a></h2>
242<div class="doc-section">
243
244<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
245
246<p>The format of the AcquireMagickMemory method is:</p>
247
248<pre class="code">
249 void *AcquireMagickMemory(const size_t size)
250</pre>
251
252<p>A description of each parameter follows:</p>
253
254<h5>size</h5>
255<p>the size of the memory in bytes to allocate.</p>
256
257 </div>
258<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="AcquireQuantumMemory">AcquireQuantumMemory</a></h2>
259<div class="doc-section">
260
261<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
262
263<p>The format of the AcquireQuantumMemory method is:</p>
264
265<pre class="code">
266 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
267</pre>
268
269<p>A description of each parameter follows:</p>
270
271<h5>count</h5>
272<p>the number of quantum elements to allocate.</p>
273
274<h5>quantum</h5>
275<p>the number of bytes in each quantum.</p>
276
277 </div>
278<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="CopyMagickMemory">CopyMagickMemory</a></h2>
279<div class="doc-section">
280
281<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>
282
283<p>The format of the CopyMagickMemory method is:</p>
284
285<pre class="code">
286 void *CopyMagickMemory(void *destination,const void *source,
287 const size_t size)
288</pre>
289
290<p>A description of each parameter follows:</p>
291
292<h5>destination</h5>
293<p>the destination.</p>
294
295<h5>source</h5>
296<p>the source.</p>
297
298<h5>size</h5>
299<p>the size of the memory in bytes to allocate.</p>
300
301 </div>
302<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="GetMagickMemoryMethods">GetMagickMemoryMethods</a></h2>
303<div class="doc-section">
304
305<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
306
307<p>The format of the GetMagickMemoryMethods() method is:</p>
308
309<pre class="code">
310 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
311 ResizeMemoryHandler *resize_memory_handler,
312 DestroyMemoryHandler *destroy_memory_handler)
313</pre>
314
315<p>A description of each parameter follows:</p>
316
317<h5>acquire_memory_handler</h5>
318<p>method to acquire memory (e.g. malloc).</p>
319
320<h5>resize_memory_handler</h5>
321<p>method to resize memory (e.g. realloc).</p>
322
323<h5>destroy_memory_handler</h5>
324<p>method to destroy memory (e.g. free).</p>
325
326 </div>
327<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="RelinquishAlignedMemory">RelinquishAlignedMemory</a></h2>
328<div class="doc-section">
329
330<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
331
332<p>The format of the RelinquishAlignedMemory method is:</p>
333
334<pre class="code">
335 void *RelinquishAlignedMemory(void *memory)
336</pre>
337
338<p>A description of each parameter follows:</p>
339
340<h5>memory</h5>
341<p>A pointer to a block of memory to free for reuse.</p>
342
343 </div>
344<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="RelinquishMagickMemory">RelinquishMagickMemory</a></h2>
345<div class="doc-section">
346
347<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
348
349<p>The format of the RelinquishMagickMemory method is:</p>
350
351<pre class="code">
352 void *RelinquishMagickMemory(void *memory)
353</pre>
354
355<p>A description of each parameter follows:</p>
356
357<h5>memory</h5>
358<p>A pointer to a block of memory to free for reuse.</p>
359
360 </div>
361<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResetMagickMemory">ResetMagickMemory</a></h2>
362<div class="doc-section">
363
364<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
365
366<p>The format of the ResetMagickMemory method is:</p>
367
368<pre class="code">
369 void *ResetMagickMemory(void *memory,int byte,const size_t size)
370</pre>
371
372<p>A description of each parameter follows:</p>
373
374<h5>memory</h5>
375<p>A pointer to a memory allocation.</p>
376
377<h5>byte</h5>
378<p>Set the memory to this value.</p>
379
380<h5>size</h5>
381<p>Size of the memory to reset.</p>
382
383 </div>
384<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResizeMagickMemory">ResizeMagickMemory</a></h2>
385<div class="doc-section">
386
387<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>
388
389<p>The format of the ResizeMagickMemory method is:</p>
390
391<pre class="code">
392 void *ResizeMagickMemory(void *memory,const size_t size)
393</pre>
394
395<p>A description of each parameter follows:</p>
396
397<h5>memory</h5>
398<p>A pointer to a memory allocation.</p>
399
400<h5>size</h5>
401<p>the new size of the allocated memory.</p>
402
403 </div>
404<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="ResizeQuantumMemory">ResizeQuantumMemory</a></h2>
405<div class="doc-section">
406
407<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>
408
409<p>The format of the ResizeQuantumMemory method is:</p>
410
411<pre class="code">
412 void *ResizeQuantumMemory(void *memory,const size_t count,
413 const size_t quantum)
414</pre>
415
416<p>A description of each parameter follows:</p>
417
418<h5>memory</h5>
419<p>A pointer to a memory allocation.</p>
420
421<h5>count</h5>
422<p>the number of quantum elements to allocate.</p>
423
424<h5>quantum</h5>
425<p>the number of bytes in each quantum.</p>
426
427 </div>
428<h2><a href="http://www.imagemagick.org/api/MagickCore/memory_8c.html" id="SetMagickMemoryMethods">SetMagickMemoryMethods</a></h2>
429<div class="doc-section">
430
431<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
432
433<p>The format of the SetMagickMemoryMethods() method is:</p>
434
435<pre class="code">
436 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
437 ResizeMemoryHandler resize_memory_handler,
438 DestroyMemoryHandler destroy_memory_handler)
439</pre>
440
441<p>A description of each parameter follows:</p>
442
443<h5>acquire_memory_handler</h5>
444<p>method to acquire memory (e.g. malloc).</p>
445
446<h5>resize_memory_handler</h5>
447<p>method to resize memory (e.g. realloc).</p>
448
449<h5>destroy_memory_handler</h5>
450<p>method to destroy memory (e.g. free).</p>
451
452 </div>
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