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190
191<div class="main">
192
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]193<h1>Module memory Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]194<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]195
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]196<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]197<div class="doc-section">
198
199<p>AcquireAlignedMemory() returns a pointer to a block of memory at least size bytes whose address is a multiple of 16*sizeof(void *).</p>
200
201<p>The format of the AcquireAlignedMemory method is:</p>
202
203<pre class="code">
204 void *AcquireAlignedMemory(const size_t count,const size_t quantum)
205</pre>
206
207<p>A description of each parameter follows:</p>
208
209<h5>count</h5>
210<p>the number of quantum elements to allocate.</p>
211
212<h5>quantum</h5>
213<p>the number of bytes in each quantum.</p>
214
215 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]216<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]217<div class="doc-section">
218
219<p>AcquireMagickMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use.</p>
220
221<p>The format of the AcquireMagickMemory method is:</p>
222
223<pre class="code">
224 void *AcquireMagickMemory(const size_t size)
225</pre>
226
227<p>A description of each parameter follows:</p>
228
229<h5>size</h5>
230<p>the size of the memory in bytes to allocate.</p>
231
232 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]233<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]234<div class="doc-section">
235
236<p>AcquireQuantumMemory() returns a pointer to a block of memory at least count * quantum bytes suitably aligned for any use.</p>
237
238<p>The format of the AcquireQuantumMemory method is:</p>
239
240<pre class="code">
241 void *AcquireQuantumMemory(const size_t count,const size_t quantum)
242</pre>
243
244<p>A description of each parameter follows:</p>
245
246<h5>count</h5>
247<p>the number of quantum elements to allocate.</p>
248
249<h5>quantum</h5>
250<p>the number of bytes in each quantum.</p>
251
252 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]253<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]254<div class="doc-section">
255
256<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>
257
258<p>The format of the CopyMagickMemory method is:</p>
259
260<pre class="code">
261 void *CopyMagickMemory(void *destination,const void *source,
262 const size_t size)
263</pre>
264
265<p>A description of each parameter follows:</p>
266
267<h5>destination</h5>
268<p>the destination.</p>
269
270<h5>source</h5>
271<p>the source.</p>
272
273<h5>size</h5>
274<p>the size of the memory in bytes to allocate.</p>
275
276 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]277<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]278<div class="doc-section">
279
280<p>GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy memory.</p>
281
282<p>The format of the GetMagickMemoryMethods() method is:</p>
283
284<pre class="code">
285 void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
286 ResizeMemoryHandler *resize_memory_handler,
287 DestroyMemoryHandler *destroy_memory_handler)
288</pre>
289
290<p>A description of each parameter follows:</p>
291
292<h5>acquire_memory_handler</h5>
293<p>method to acquire memory (e.g. malloc).</p>
294
295<h5>resize_memory_handler</h5>
296<p>method to resize memory (e.g. realloc).</p>
297
298<h5>destroy_memory_handler</h5>
299<p>method to destroy memory (e.g. free).</p>
300
301 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]302<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]303<div class="doc-section">
304
305<p>RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory() or reuse.</p>
306
307<p>The format of the RelinquishAlignedMemory method is:</p>
308
309<pre class="code">
310 void *RelinquishAlignedMemory(void *memory)
311</pre>
312
313<p>A description of each parameter follows:</p>
314
315<h5>memory</h5>
316<p>A pointer to a block of memory to free for reuse.</p>
317
318 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]319<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]320<div class="doc-section">
321
322<p>RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory() or AcquireQuantumMemory() for reuse.</p>
323
324<p>The format of the RelinquishMagickMemory method is:</p>
325
326<pre class="code">
327 void *RelinquishMagickMemory(void *memory)
328</pre>
329
330<p>A description of each parameter follows:</p>
331
332<h5>memory</h5>
333<p>A pointer to a block of memory to free for reuse.</p>
334
335 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]336<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]337<div class="doc-section">
338
339<p>ResetMagickMemory() fills the first size bytes of the memory area pointed to by memory with the constant byte c.</p>
340
341<p>The format of the ResetMagickMemory method is:</p>
342
343<pre class="code">
344 void *ResetMagickMemory(void *memory,int byte,const size_t size)
345</pre>
346
347<p>A description of each parameter follows:</p>
348
349<h5>memory</h5>
350<p>A pointer to a memory allocation.</p>
351
352<h5>byte</h5>
353<p>Set the memory to this value.</p>
354
355<h5>size</h5>
356<p>Size of the memory to reset.</p>
357
358 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]359<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]360<div class="doc-section">
361
362<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>
363
364<p>The format of the ResizeMagickMemory method is:</p>
365
366<pre class="code">
367 void *ResizeMagickMemory(void *memory,const size_t size)
368</pre>
369
370<p>A description of each parameter follows:</p>
371
372<h5>memory</h5>
373<p>A pointer to a memory allocation.</p>
374
375<h5>size</h5>
376<p>the new size of the allocated memory.</p>
377
378 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]379<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]380<div class="doc-section">
381
382<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>
383
384<p>The format of the ResizeQuantumMemory method is:</p>
385
386<pre class="code">
387 void *ResizeQuantumMemory(void *memory,const size_t count,
388 const size_t quantum)
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>count</h5>
397<p>the number of quantum elements to allocate.</p>
398
399<h5>quantum</h5>
400<p>the number of bytes in each quantum.</p>
401
402 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame^]403<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]404<div class="doc-section">
405
406<p>SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy memory.</p>
407
408<p>The format of the SetMagickMemoryMethods() method is:</p>
409
410<pre class="code">
411 SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
412 ResizeMemoryHandler resize_memory_handler,
413 DestroyMemoryHandler destroy_memory_handler)
414</pre>
415
416<p>A description of each parameter follows:</p>
417
418<h5>acquire_memory_handler</h5>
419<p>method to acquire memory (e.g. malloc).</p>
420
421<h5>resize_memory_handler</h5>
422<p>method to resize memory (e.g. realloc).</p>
423
424<h5>destroy_memory_handler</h5>
425<p>method to destroy memory (e.g. free).</p>
426
427 </div>
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