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<span class="refentrytitle">xmlmemory</span>
</h2>
<p>xmlmemory - interface for the memory allocator</p>
<p>provides interfaces for the memory allocator, including debugging capabilities. </p>
<p>Author(s): Daniel Veillard </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">#define <a href="#xmlRealloc">xmlRealloc</a>;
#define <a href="#xmlMalloc">xmlMalloc</a>;
#define <a href="#xmlMallocAtomic">xmlMallocAtomic</a>;
#define <a href="#DEBUG_MEMORY">DEBUG_MEMORY</a>;
#define <a href="#xmlMemStrdup">xmlMemStrdup</a>;
void * <a href="#xmlMemRealloc">xmlMemRealloc</a> (void * ptr, <br/> size_t size);
int <a href="#xmlInitMemory">xmlInitMemory</a> (void);
void <a href="#xmlMemFree">xmlMemFree</a> (void * ptr);
void * <a href="#xmlMemMalloc">xmlMemMalloc</a> (size_t size);
void <a href="#xmlMemDisplayLast">xmlMemDisplayLast</a> (FILE * fp, <br/> long nbBytes);
int <a href="#xmlMemGet">xmlMemGet</a> (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> * freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> * reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> * strdupFunc);
void <a href="#xmlMemoryDump">xmlMemoryDump</a> (void);
void * <a href="#xmlMallocLoc">xmlMallocLoc</a> (size_t size, <br/> const char * file, <br/> int line);
void <a href="#xmlMemDisplay">xmlMemDisplay</a> (FILE * fp);
int <a href="#xmlMemBlocks">xmlMemBlocks</a> (void);
int <a href="#xmlGcMemGet">xmlGcMemGet</a> (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> * freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocAtomicFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> * reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> * strdupFunc);
typedef char * <a href="#xmlStrdupFunc">xmlStrdupFunc</a> (const char * str);
typedef void <a href="#xmlFreeFunc">xmlFreeFunc</a> (void * mem);
void <a href="#xmlMemShow">xmlMemShow</a> (FILE * fp, <br/> int nr);
void * <a href="#xmlMallocAtomicLoc">xmlMallocAtomicLoc</a> (size_t size, <br/> const char * file, <br/> int line);
void * <a href="#xmlReallocLoc">xmlReallocLoc</a> (void * ptr, <br/> size_t size, <br/> const char * file, <br/> int line);
void <a href="#xmlCleanupMemory">xmlCleanupMemory</a> (void);
int <a href="#xmlMemUsed">xmlMemUsed</a> (void);
int <a href="#xmlMemSetup">xmlMemSetup</a> (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> strdupFunc);
typedef void * <a href="#xmlReallocFunc">xmlReallocFunc</a> (void * mem, <br/> size_t size);
typedef void * <a href="#xmlMallocFunc">xmlMallocFunc</a> (size_t size);
int <a href="#xmlGcMemSetup">xmlGcMemSetup</a> (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocAtomicFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> strdupFunc);
char * <a href="#xmlMemoryStrdup">xmlMemoryStrdup</a> (const char * str);
char * <a href="#xmlMemStrdupLoc">xmlMemStrdupLoc</a> (const char * str, <br/> const char * file, <br/> int line);
</pre>
</div>
<div class="refsect1" lang="en">
<h2>Description</h2>
</div>
<div class="refsect1" lang="en">
<h2>Details</h2>
<div class="refsect2" lang="en">
<div class="refsect2" lang="en"><h3><a name="DEBUG_MEMORY">Macro </a>DEBUG_MEMORY</h3><pre class="programlisting">#define <a href="#DEBUG_MEMORY">DEBUG_MEMORY</a>;
</pre><p><a href="libxml2-xmlmemory.html#DEBUG_MEMORY">DEBUG_MEMORY</a> replaces the allocator with a collect and debug shell to the libc allocator. <a href="libxml2-xmlmemory.html#DEBUG_MEMORY">DEBUG_MEMORY</a> should only be activated when debugging libxml i.e. if libxml has been configured with --with-debug-mem too. #define DEBUG_MEMORY_FREED #define <a href="libxml2-xmlversion.html#DEBUG_MEMORY_LOCATION">DEBUG_MEMORY_LOCATION</a></p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlFreeFunc"/>Function type xmlFreeFunc</h3><pre class="programlisting">void xmlFreeFunc (void * mem)<br/>
</pre><p>Signature for a free() implementation.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>mem</tt></i>:</span></td><td>an already allocated block of memory</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMallocFunc"/>Function type xmlMallocFunc</h3><pre class="programlisting">void * xmlMallocFunc (size_t size)<br/>
</pre><p>Signature for a malloc() implementation.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>the size requested in bytes</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the newly allocated block or NULL in case of error.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlReallocFunc"/>Function type xmlReallocFunc</h3><pre class="programlisting">void * xmlReallocFunc (void * mem, <br/> size_t size)<br/>
</pre><p>Signature for a realloc() implementation.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>mem</tt></i>:</span></td><td>an already allocated block of memory</td></tr><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>the new size requested in bytes</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the newly reallocated block or NULL in case of error.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStrdupFunc"/>Function type xmlStrdupFunc</h3><pre class="programlisting">char * xmlStrdupFunc (const char * str)<br/>
</pre><p>Signature for an strdup() implementation.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>a zero terminated string</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the copy of the string or NULL in case of error.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlCleanupMemory"/>xmlCleanupMemory ()</h3><pre class="programlisting">void xmlCleanupMemory (void)<br/>
</pre><p>Free up all the memory allocated by the library for its own use. This should not be called by user level code.</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlGcMemGet"/>xmlGcMemGet ()</h3><pre class="programlisting">int xmlGcMemGet (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> * freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocAtomicFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> * reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> * strdupFunc)<br/>
</pre><p>Provides the memory access functions set currently in use The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>freeFunc</tt></i>:</span></td><td>place to save the free() function in use</td></tr><tr><td><span class="term"><i><tt>mallocFunc</tt></i>:</span></td><td>place to save the malloc() function in use</td></tr><tr><td><span class="term"><i><tt>mallocAtomicFunc</tt></i>:</span></td><td>place to save the atomic malloc() function in use</td></tr><tr><td><span class="term"><i><tt>reallocFunc</tt></i>:</span></td><td>place to save the realloc() function in use</td></tr><tr><td><span class="term"><i><tt>strdupFunc</tt></i>:</span></td><td>place to save the strdup() function in use</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 on success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlGcMemSetup"/>xmlGcMemSetup ()</h3><pre class="programlisting">int xmlGcMemSetup (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocAtomicFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> strdupFunc)<br/>
</pre><p>Override the default memory access functions with a new set This has to be called before any other libxml routines ! The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators Should this be blocked if there was already some allocations done ?</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>freeFunc</tt></i>:</span></td><td>the free() function to use</td></tr><tr><td><span class="term"><i><tt>mallocFunc</tt></i>:</span></td><td>the malloc() function to use</td></tr><tr><td><span class="term"><i><tt>mallocAtomicFunc</tt></i>:</span></td><td>the malloc() function to use for atomic allocations</td></tr><tr><td><span class="term"><i><tt>reallocFunc</tt></i>:</span></td><td>the realloc() function to use</td></tr><tr><td><span class="term"><i><tt>strdupFunc</tt></i>:</span></td><td>the strdup() function to use</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 on success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlInitMemory"/>xmlInitMemory ()</h3><pre class="programlisting">int xmlInitMemory (void)<br/>
</pre><p>Initialize the memory layer.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 on success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMallocAtomicLoc"/>xmlMallocAtomicLoc ()</h3><pre class="programlisting">void * xmlMallocAtomicLoc (size_t size, <br/> const char * file, <br/> int line)<br/>
</pre><p>a malloc() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>an int specifying the size in byte to allocate.</td></tr><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>the file name or NULL</td></tr><tr><td><span class="term"><i><tt>line</tt></i>:</span></td><td>the line number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the allocated area or NULL in case of lack of memory.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMallocLoc"/>xmlMallocLoc ()</h3><pre class="programlisting">void * xmlMallocLoc (size_t size, <br/> const char * file, <br/> int line)<br/>
</pre><p>a malloc() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>an int specifying the size in byte to allocate.</td></tr><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>the file name or NULL</td></tr><tr><td><span class="term"><i><tt>line</tt></i>:</span></td><td>the line number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the allocated area or NULL in case of lack of memory.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemBlocks"/>xmlMemBlocks ()</h3><pre class="programlisting">int xmlMemBlocks (void)<br/>
</pre><p>Provides the number of memory areas currently allocated</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>an int representing the number of blocks</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemDisplay"/>xmlMemDisplay ()</h3><pre class="programlisting">void xmlMemDisplay (FILE * fp)<br/>
</pre><p>show in-extenso the memory blocks allocated</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>fp</tt></i>:</span></td><td>a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemDisplayLast"/>xmlMemDisplayLast ()</h3><pre class="programlisting">void xmlMemDisplayLast (FILE * fp, <br/> long nbBytes)<br/>
</pre><p>the last nbBytes of memory allocated and not freed, useful for dumping the memory left allocated between two places at runtime.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>fp</tt></i>:</span></td><td>a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist</td></tr><tr><td><span class="term"><i><tt>nbBytes</tt></i>:</span></td><td>the amount of memory to dump</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemFree"/>xmlMemFree ()</h3><pre class="programlisting">void xmlMemFree (void * ptr)<br/>
</pre><p>a free() equivalent, with error checking.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ptr</tt></i>:</span></td><td>the memory block pointer</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemGet"/>xmlMemGet ()</h3><pre class="programlisting">int xmlMemGet (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> * freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> * mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> * reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> * strdupFunc)<br/>
</pre><p>Provides the memory access functions set currently in use</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>freeFunc</tt></i>:</span></td><td>place to save the free() function in use</td></tr><tr><td><span class="term"><i><tt>mallocFunc</tt></i>:</span></td><td>place to save the malloc() function in use</td></tr><tr><td><span class="term"><i><tt>reallocFunc</tt></i>:</span></td><td>place to save the realloc() function in use</td></tr><tr><td><span class="term"><i><tt>strdupFunc</tt></i>:</span></td><td>place to save the strdup() function in use</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 on success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemMalloc"/>xmlMemMalloc ()</h3><pre class="programlisting">void * xmlMemMalloc (size_t size)<br/>
</pre><p>a malloc() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>an int specifying the size in byte to allocate.</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the allocated area or NULL in case of lack of memory.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemRealloc"/>xmlMemRealloc ()</h3><pre class="programlisting">void * xmlMemRealloc (void * ptr, <br/> size_t size)<br/>
</pre><p>a realloc() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ptr</tt></i>:</span></td><td>the initial memory block pointer</td></tr><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>an int specifying the size in byte to allocate.</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the allocated area or NULL in case of lack of memory.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemSetup"/>xmlMemSetup ()</h3><pre class="programlisting">int xmlMemSetup (<a href="libxml2-xmlmemory.html#xmlFreeFunc">xmlFreeFunc</a> freeFunc, <br/> <a href="libxml2-xmlmemory.html#xmlMallocFunc">xmlMallocFunc</a> mallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlReallocFunc">xmlReallocFunc</a> reallocFunc, <br/> <a href="libxml2-xmlmemory.html#xmlStrdupFunc">xmlStrdupFunc</a> strdupFunc)<br/>
</pre><p>Override the default memory access functions with a new set This has to be called before any other libxml routines ! Should this be blocked if there was already some allocations done ?</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>freeFunc</tt></i>:</span></td><td>the free() function to use</td></tr><tr><td><span class="term"><i><tt>mallocFunc</tt></i>:</span></td><td>the malloc() function to use</td></tr><tr><td><span class="term"><i><tt>reallocFunc</tt></i>:</span></td><td>the realloc() function to use</td></tr><tr><td><span class="term"><i><tt>strdupFunc</tt></i>:</span></td><td>the strdup() function to use</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 on success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemShow"/>xmlMemShow ()</h3><pre class="programlisting">void xmlMemShow (FILE * fp, <br/> int nr)<br/>
</pre><p>show a show display of the memory allocated, and dump the @nr last allocated areas which were not freed</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>fp</tt></i>:</span></td><td>a FILE descriptor used as the output file</td></tr><tr><td><span class="term"><i><tt>nr</tt></i>:</span></td><td>number of entries to dump</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemStrdupLoc"/>xmlMemStrdupLoc ()</h3><pre class="programlisting">char * xmlMemStrdupLoc (const char * str, <br/> const char * file, <br/> int line)<br/>
</pre><p>a strdup() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the initial string pointer</td></tr><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>the file name or NULL</td></tr><tr><td><span class="term"><i><tt>line</tt></i>:</span></td><td>the line number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the new string or NULL if allocation error occurred.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemUsed"/>xmlMemUsed ()</h3><pre class="programlisting">int xmlMemUsed (void)<br/>
</pre><p>Provides the amount of memory currently allocated</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>an int representing the amount of memory allocated.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlMemoryDump"/>xmlMemoryDump ()</h3><pre class="programlisting">void xmlMemoryDump (void)<br/>
</pre><p>Dump in-extenso the memory blocks allocated to the file .memorylist</p>
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<div class="refsect2" lang="en"><h3><a name="xmlMemoryStrdup"/>xmlMemoryStrdup ()</h3><pre class="programlisting">char * xmlMemoryStrdup (const char * str)<br/>
</pre><p>a strdup() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the initial string pointer</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the new string or NULL if allocation error occurred.</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="xmlReallocLoc"/>xmlReallocLoc ()</h3><pre class="programlisting">void * xmlReallocLoc (void * ptr, <br/> size_t size, <br/> const char * file, <br/> int line)<br/>
</pre><p>a realloc() equivalent, with logging of the allocation info.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ptr</tt></i>:</span></td><td>the initial memory block pointer</td></tr><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>an int specifying the size in byte to allocate.</td></tr><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>the file name or NULL</td></tr><tr><td><span class="term"><i><tt>line</tt></i>:</span></td><td>the line number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the allocated area or NULL in case of lack of memory.</td></tr></tbody></table></div></div>
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