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191<div class="main">
192
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame^]193<h1>Module memory
194 Methods</h1>
195<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]196
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame^]197<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
198_8c.html" id="AcquireAlignedMemory">AcquireAlignedMemory</a></h2>
199<div class="doc-section">
200
201<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
202
203<p>The format of the AcquireAlignedMemory method is:</p>
204
205<pre class="code">
206 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
207</pre>
208
209<p>A description of each parameter follows:</p>
210
211<h5>count</h5>
212<p>the number of quantum elements to allocate.</p>
213
214<h5>quantum</h5>
215<p>the number of bytes in each quantum.</p>
216
217 </div>
218<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
219_8c.html" id="AcquireMagickMemory">AcquireMagickMemory</a></h2>
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>
236<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
237_8c.html" id="AcquireQuantumMemory">AcquireQuantumMemory</a></h2>
238<div class="doc-section">
239
240<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
241
242<p>The format of the AcquireQuantumMemory method is:</p>
243
244<pre class="code">
245 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
246</pre>
247
248<p>A description of each parameter follows:</p>
249
250<h5>count</h5>
251<p>the number of quantum elements to allocate.</p>
252
253<h5>quantum</h5>
254<p>the number of bytes in each quantum.</p>
255
256 </div>
257<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
258_8c.html" id="CopyMagickMemory">CopyMagickMemory</a></h2>
259<div class="doc-section">
260
261<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>
262
263<p>The format of the CopyMagickMemory method is:</p>
264
265<pre class="code">
266 void *CopyMagickMemory(void *destination,const void *source,
267 const size_t size)
268</pre>
269
270<p>A description of each parameter follows:</p>
271
272<h5>destination</h5>
273<p>the destination.</p>
274
275<h5>source</h5>
276<p>the source.</p>
277
278<h5>size</h5>
279<p>the size of the memory in bytes to allocate.</p>
280
281 </div>
282<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
283_8c.html" id="GetMagickMemoryMethods">GetMagickMemoryMethods</a></h2>
284<div class="doc-section">
285
286<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
287
288<p>The format of the GetMagickMemoryMethods() method is:</p>
289
290<pre class="code">
291 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
292 ResizeMemoryHandler *resize_memory_handler,
293 DestroyMemoryHandler *destroy_memory_handler)
294</pre>
295
296<p>A description of each parameter follows:</p>
297
298<h5>acquire_memory_handler</h5>
299<p>method to acquire memory (e.g. malloc).</p>
300
301<h5>resize_memory_handler</h5>
302<p>method to resize memory (e.g. realloc).</p>
303
304<h5>destroy_memory_handler</h5>
305<p>method to destroy memory (e.g. free).</p>
306
307 </div>
308<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
309_8c.html" id="RelinquishAlignedMemory">RelinquishAlignedMemory</a></h2>
310<div class="doc-section">
311
312<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
313
314<p>The format of the RelinquishAlignedMemory method is:</p>
315
316<pre class="code">
317 void *RelinquishAlignedMemory(void *memory)
318</pre>
319
320<p>A description of each parameter follows:</p>
321
322<h5>memory</h5>
323<p>A pointer to a block of memory to free for reuse.</p>
324
325 </div>
326<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
327_8c.html" id="RelinquishMagickMemory">RelinquishMagickMemory</a></h2>
328<div class="doc-section">
329
330<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
331
332<p>The format of the RelinquishMagickMemory method is:</p>
333
334<pre class="code">
335 void *RelinquishMagickMemory(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
345_8c.html" id="ResetMagickMemory">ResetMagickMemory</a></h2>
346<div class="doc-section">
347
348<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
349
350<p>The format of the ResetMagickMemory method is:</p>
351
352<pre class="code">
353 void *ResetMagickMemory(void *memory,int byte,const size_t size)
354</pre>
355
356<p>A description of each parameter follows:</p>
357
358<h5>memory</h5>
359<p>A pointer to a memory allocation.</p>
360
361<h5>byte</h5>
362<p>Set the memory to this value.</p>
363
364<h5>size</h5>
365<p>Size of the memory to reset.</p>
366
367 </div>
368<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
369_8c.html" id="ResizeMagickMemory">ResizeMagickMemory</a></h2>
370<div class="doc-section">
371
372<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>
373
374<p>The format of the ResizeMagickMemory method is:</p>
375
376<pre class="code">
377 void *ResizeMagickMemory(void *memory,const size_t size)
378</pre>
379
380<p>A description of each parameter follows:</p>
381
382<h5>memory</h5>
383<p>A pointer to a memory allocation.</p>
384
385<h5>size</h5>
386<p>the new size of the allocated memory.</p>
387
388 </div>
389<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
390_8c.html" id="ResizeQuantumMemory">ResizeQuantumMemory</a></h2>
391<div class="doc-section">
392
393<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>
394
395<p>The format of the ResizeQuantumMemory method is:</p>
396
397<pre class="code">
398 void *ResizeQuantumMemory(void *memory,const size_t count,
399 const size_t quantum)
400</pre>
401
402<p>A description of each parameter follows:</p>
403
404<h5>memory</h5>
405<p>A pointer to a memory allocation.</p>
406
407<h5>count</h5>
408<p>the number of quantum elements to allocate.</p>
409
410<h5>quantum</h5>
411<p>the number of bytes in each quantum.</p>
412
413 </div>
414<h2><a href="http://www.imagemagick.org/api/MagickCore/memory
415_8c.html" id="SetMagickMemoryMethods">SetMagickMemoryMethods</a></h2>
416<div class="doc-section">
417
418<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
419
420<p>The format of the SetMagickMemoryMethods() method is:</p>
421
422<pre class="code">
423 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
424 ResizeMemoryHandler resize_memory_handler,
425 DestroyMemoryHandler destroy_memory_handler)
426</pre>
427
428<p>A description of each parameter follows:</p>
429
430<h5>acquire_memory_handler</h5>
431<p>method to acquire memory (e.g. malloc).</p>
432
433<h5>resize_memory_handler</h5>
434<p>method to resize memory (e.g. realloc).</p>
435
436<h5>destroy_memory_handler</h5>
437<p>method to destroy memory (e.g. free).</p>
438
439 </div>
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