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205</div>
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211
212<div class="main">
213
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]214<h1>Module memory Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]215<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]216
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]217<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]218<div class="doc-section">
219
220<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
221
222<p>The format of the AcquireAlignedMemory method is:</p>
223
224<pre class="code">
225 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
226</pre>
227
228<p>A description of each parameter follows:</p>
229
230<h5>count</h5>
231<p>the number of quantum elements to allocate.</p>
232
233<h5>quantum</h5>
234<p>the number of bytes in each quantum.</p>
235
236 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]237<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]238<div class="doc-section">
239
240<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
241
242<p>The format of the AcquireMagickMemory method is:</p>
243
244<pre class="code">
245 void *AcquireMagickMemory(const size_t size)
246</pre>
247
248<p>A description of each parameter follows:</p>
249
250<h5>size</h5>
251<p>the size of the memory in bytes to allocate.</p>
252
253 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]254<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]255<div class="doc-section">
256
257<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
258
259<p>The format of the AcquireQuantumMemory method is:</p>
260
261<pre class="code">
262 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
263</pre>
264
265<p>A description of each parameter follows:</p>
266
267<h5>count</h5>
268<p>the number of quantum elements to allocate.</p>
269
270<h5>quantum</h5>
271<p>the number of bytes in each quantum.</p>
272
273 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]274<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]275<div class="doc-section">
276
277<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>
278
279<p>The format of the CopyMagickMemory method is:</p>
280
281<pre class="code">
282 void *CopyMagickMemory(void *destination,const void *source,
283 const size_t size)
284</pre>
285
286<p>A description of each parameter follows:</p>
287
288<h5>destination</h5>
289<p>the destination.</p>
290
291<h5>source</h5>
292<p>the source.</p>
293
294<h5>size</h5>
295<p>the size of the memory in bytes to allocate.</p>
296
297 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]298<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]299<div class="doc-section">
300
301<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
302
303<p>The format of the GetMagickMemoryMethods() method is:</p>
304
305<pre class="code">
306 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
307 ResizeMemoryHandler *resize_memory_handler,
308 DestroyMemoryHandler *destroy_memory_handler)
309</pre>
310
311<p>A description of each parameter follows:</p>
312
313<h5>acquire_memory_handler</h5>
314<p>method to acquire memory (e.g. malloc).</p>
315
316<h5>resize_memory_handler</h5>
317<p>method to resize memory (e.g. realloc).</p>
318
319<h5>destroy_memory_handler</h5>
320<p>method to destroy memory (e.g. free).</p>
321
322 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]323<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]324<div class="doc-section">
325
326<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
327
328<p>The format of the RelinquishAlignedMemory method is:</p>
329
330<pre class="code">
331 void *RelinquishAlignedMemory(void *memory)
332</pre>
333
334<p>A description of each parameter follows:</p>
335
336<h5>memory</h5>
337<p>A pointer to a block of memory to free for reuse.</p>
338
339 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]340<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]341<div class="doc-section">
342
343<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
344
345<p>The format of the RelinquishMagickMemory method is:</p>
346
347<pre class="code">
348 void *RelinquishMagickMemory(void *memory)
349</pre>
350
351<p>A description of each parameter follows:</p>
352
353<h5>memory</h5>
354<p>A pointer to a block of memory to free for reuse.</p>
355
356 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]357<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]358<div class="doc-section">
359
360<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
361
362<p>The format of the ResetMagickMemory method is:</p>
363
364<pre class="code">
365 void *ResetMagickMemory(void *memory,int byte,const size_t size)
366</pre>
367
368<p>A description of each parameter follows:</p>
369
370<h5>memory</h5>
371<p>A pointer to a memory allocation.</p>
372
373<h5>byte</h5>
374<p>Set the memory to this value.</p>
375
376<h5>size</h5>
377<p>Size of the memory to reset.</p>
378
379 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]380<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]381<div class="doc-section">
382
383<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>
384
385<p>The format of the ResizeMagickMemory method is:</p>
386
387<pre class="code">
388 void *ResizeMagickMemory(void *memory,const size_t size)
389</pre>
390
391<p>A description of each parameter follows:</p>
392
393<h5>memory</h5>
394<p>A pointer to a memory allocation.</p>
395
396<h5>size</h5>
397<p>the new size of the allocated memory.</p>
398
399 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]400<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]401<div class="doc-section">
402
403<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>
404
405<p>The format of the ResizeQuantumMemory method is:</p>
406
407<pre class="code">
408 void *ResizeQuantumMemory(void *memory,const size_t count,
409 const size_t quantum)
410</pre>
411
412<p>A description of each parameter follows:</p>
413
414<h5>memory</h5>
415<p>A pointer to a memory allocation.</p>
416
417<h5>count</h5>
418<p>the number of quantum elements to allocate.</p>
419
420<h5>quantum</h5>
421<p>the number of bytes in each quantum.</p>
422
423 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]424<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]425<div class="doc-section">
426
427<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
428
429<p>The format of the SetMagickMemoryMethods() method is:</p>
430
431<pre class="code">
432 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
433 ResizeMemoryHandler resize_memory_handler,
434 DestroyMemoryHandler destroy_memory_handler)
435</pre>
436
437<p>A description of each parameter follows:</p>
438
439<h5>acquire_memory_handler</h5>
440<p>method to acquire memory (e.g. malloc).</p>
441
442<h5>resize_memory_handler</h5>
443<p>method to resize memory (e.g. realloc).</p>
444
445<h5>destroy_memory_handler</h5>
446<p>method to destroy memory (e.g. free).</p>
447
448 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]449
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