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194<div class="main">
195
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]196<h1>Module memory Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]197<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]198
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]199<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]200<div class="doc-section">
201
202<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
203
204<p>The format of the AcquireAlignedMemory method is:</p>
205
206<pre class="code">
207 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
208</pre>
209
210<p>A description of each parameter follows:</p>
211
212<h5>count</h5>
213<p>the number of quantum elements to allocate.</p>
214
215<h5>quantum</h5>
216<p>the number of bytes in each quantum.</p>
217
218 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]219<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]220<div class="doc-section">
221
222<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
223
224<p>The format of the AcquireMagickMemory method is:</p>
225
226<pre class="code">
227 void *AcquireMagickMemory(const size_t size)
228</pre>
229
230<p>A description of each parameter follows:</p>
231
232<h5>size</h5>
233<p>the size of the memory in bytes to allocate.</p>
234
235 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]236<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]237<div class="doc-section">
238
239<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
240
241<p>The format of the AcquireQuantumMemory method is:</p>
242
243<pre class="code">
244 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
245</pre>
246
247<p>A description of each parameter follows:</p>
248
249<h5>count</h5>
250<p>the number of quantum elements to allocate.</p>
251
252<h5>quantum</h5>
253<p>the number of bytes in each quantum.</p>
254
255 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]256<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]257<div class="doc-section">
258
259<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>
260
261<p>The format of the CopyMagickMemory method is:</p>
262
263<pre class="code">
264 void *CopyMagickMemory(void *destination,const void *source,
265 const size_t size)
266</pre>
267
268<p>A description of each parameter follows:</p>
269
270<h5>destination</h5>
271<p>the destination.</p>
272
273<h5>source</h5>
274<p>the source.</p>
275
276<h5>size</h5>
277<p>the size of the memory in bytes to allocate.</p>
278
279 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]280<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]281<div class="doc-section">
282
283<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
284
285<p>The format of the GetMagickMemoryMethods() method is:</p>
286
287<pre class="code">
288 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
289 ResizeMemoryHandler *resize_memory_handler,
290 DestroyMemoryHandler *destroy_memory_handler)
291</pre>
292
293<p>A description of each parameter follows:</p>
294
295<h5>acquire_memory_handler</h5>
296<p>method to acquire memory (e.g. malloc).</p>
297
298<h5>resize_memory_handler</h5>
299<p>method to resize memory (e.g. realloc).</p>
300
301<h5>destroy_memory_handler</h5>
302<p>method to destroy memory (e.g. free).</p>
303
304 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]305<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]306<div class="doc-section">
307
308<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
309
310<p>The format of the RelinquishAlignedMemory method is:</p>
311
312<pre class="code">
313 void *RelinquishAlignedMemory(void *memory)
314</pre>
315
316<p>A description of each parameter follows:</p>
317
318<h5>memory</h5>
319<p>A pointer to a block of memory to free for reuse.</p>
320
321 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]322<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]323<div class="doc-section">
324
325<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
326
327<p>The format of the RelinquishMagickMemory method is:</p>
328
329<pre class="code">
330 void *RelinquishMagickMemory(void *memory)
331</pre>
332
333<p>A description of each parameter follows:</p>
334
335<h5>memory</h5>
336<p>A pointer to a block of memory to free for reuse.</p>
337
338 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]339<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]340<div class="doc-section">
341
342<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
343
344<p>The format of the ResetMagickMemory method is:</p>
345
346<pre class="code">
347 void *ResetMagickMemory(void *memory,int byte,const size_t size)
348</pre>
349
350<p>A description of each parameter follows:</p>
351
352<h5>memory</h5>
353<p>A pointer to a memory allocation.</p>
354
355<h5>byte</h5>
356<p>Set the memory to this value.</p>
357
358<h5>size</h5>
359<p>Size of the memory to reset.</p>
360
361 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]362<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]363<div class="doc-section">
364
365<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>
366
367<p>The format of the ResizeMagickMemory method is:</p>
368
369<pre class="code">
370 void *ResizeMagickMemory(void *memory,const size_t size)
371</pre>
372
373<p>A description of each parameter follows:</p>
374
375<h5>memory</h5>
376<p>A pointer to a memory allocation.</p>
377
378<h5>size</h5>
379<p>the new size of the allocated memory.</p>
380
381 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]382<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]383<div class="doc-section">
384
385<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>
386
387<p>The format of the ResizeQuantumMemory method is:</p>
388
389<pre class="code">
390 void *ResizeQuantumMemory(void *memory,const size_t count,
391 const size_t quantum)
392</pre>
393
394<p>A description of each parameter follows:</p>
395
396<h5>memory</h5>
397<p>A pointer to a memory allocation.</p>
398
399<h5>count</h5>
400<p>the number of quantum elements to allocate.</p>
401
402<h5>quantum</h5>
403<p>the number of bytes in each quantum.</p>
404
405 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]406<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]407<div class="doc-section">
408
409<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
410
411<p>The format of the SetMagickMemoryMethods() method is:</p>
412
413<pre class="code">
414 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
415 ResizeMemoryHandler resize_memory_handler,
416 DestroyMemoryHandler destroy_memory_handler)
417</pre>
418
419<p>A description of each parameter follows:</p>
420
421<h5>acquire_memory_handler</h5>
422<p>method to acquire memory (e.g. malloc).</p>
423
424<h5>resize_memory_handler</h5>
425<p>method to resize memory (e.g. realloc).</p>
426
427<h5>destroy_memory_handler</h5>
428<p>method to destroy memory (e.g. free).</p>
429
430 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]431
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