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<title>EXIF library (libexif) API: libexif/exif-mem.h File Reference</title>
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<a class="el" href="dir_6b7d2a0353a66579e981c2e82ba2b6ef.html">libexif</a></div>
<h1>exif-mem.h File Reference</h1>Define the ExifMem data type and the associated functions. ExifMem defines the memory management functions used by the ExifLoader. <a href="#_details">More...</a>
<p>
<code>#include <libexif/exif-utils.h></code><br>
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<a href="exif-mem_8h-source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef void *(* </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#8bfb570d7f9c7a2e686759e77e9d984c">ExifMemAllocFunc</a> )(ExifLong s)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef void *(* </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#77e64fae08dcdc412e52b9c1cbdceddd">ExifMemReallocFunc</a> )(void *p, ExifLong s)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#9e5d88bc50fddc0eab10d86564d7a36b">ExifMemFreeFunc</a> )(void *p)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef struct _ExifMem </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#ace6f5e726c2225ae6d57a299e9e384f">exif_mem_new</a> (<a class="el" href="exif-mem_8h.html#8bfb570d7f9c7a2e686759e77e9d984c">ExifMemAllocFunc</a> a, <a class="el" href="exif-mem_8h.html#77e64fae08dcdc412e52b9c1cbdceddd">ExifMemReallocFunc</a> r, <a class="el" href="exif-mem_8h.html#9e5d88bc50fddc0eab10d86564d7a36b">ExifMemFreeFunc</a> f)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#cedafabd958c9846ea3f908135715dcf">exif_mem_ref</a> (<a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#dabd1345e1172ce379658cecfd3f7d70">exif_mem_unref</a> (<a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="00442916c2b7a2c0b43fad64f338a000"></a><!-- doxytag: member="exif-mem.h::exif_mem_alloc" ref="00442916c2b7a2c0b43fad64f338a000" args="(ExifMem *m, ExifLong s)" -->
void * </td><td class="memItemRight" valign="bottom"><b>exif_mem_alloc</b> (<a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> *m, ExifLong s)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="029f8f0346f778ac9caa56536fcf3c85"></a><!-- doxytag: member="exif-mem.h::exif_mem_realloc" ref="029f8f0346f778ac9caa56536fcf3c85" args="(ExifMem *m, void *p, ExifLong s)" -->
void * </td><td class="memItemRight" valign="bottom"><b>exif_mem_realloc</b> (<a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> *m, void *p, ExifLong s)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b7ec7776593c6ffe5f49fec974f7cfe1"></a><!-- doxytag: member="exif-mem.h::exif_mem_free" ref="b7ec7776593c6ffe5f49fec974f7cfe1" args="(ExifMem *m, void *p)" -->
void </td><td class="memItemRight" valign="bottom"><b>exif_mem_free</b> (<a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> *m, void *p)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="exif-mem_8h.html#cd2926c29b470c9d43f84567a84d5acb">exif_mem_new_default</a> (void)</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Define the ExifMem data type and the associated functions. ExifMem defines the memory management functions used by the ExifLoader.
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<hr><h2>Typedef Documentation</h2>
<a class="anchor" name="ab8aacbc0ed6f11a1f022b7b1bf4750e"></a><!-- doxytag: member="exif-mem.h::ExifMem" ref="ab8aacbc0ed6f11a1f022b7b1bf4750e" args="" -->
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<td class="memname">typedef struct _ExifMem <a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> </td>
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ExifMem define a memory allocator
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<a class="anchor" name="8bfb570d7f9c7a2e686759e77e9d984c"></a><!-- doxytag: member="exif-mem.h::ExifMemAllocFunc" ref="8bfb570d7f9c7a2e686759e77e9d984c" args=")(ExifLong s)" -->
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<td class="memname">typedef void*(* <a class="el" href="exif-mem_8h.html#8bfb570d7f9c7a2e686759e77e9d984c">ExifMemAllocFunc</a>)(ExifLong s) </td>
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Should work like calloc() <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>s</em> </td><td>the size of the block to allocate. </td></tr>
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</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the allocated memory and initialized. </dd></dl>
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<a class="anchor" name="9e5d88bc50fddc0eab10d86564d7a36b"></a><!-- doxytag: member="exif-mem.h::ExifMemFreeFunc" ref="9e5d88bc50fddc0eab10d86564d7a36b" args=")(void *p)" -->
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<td class="memname">typedef void(* <a class="el" href="exif-mem_8h.html#9e5d88bc50fddc0eab10d86564d7a36b">ExifMemFreeFunc</a>)(void *p) </td>
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Free method for ExifMem <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>p</em> </td><td>the pointer to free </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the freed pointer </dd></dl>
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<a class="anchor" name="77e64fae08dcdc412e52b9c1cbdceddd"></a><!-- doxytag: member="exif-mem.h::ExifMemReallocFunc" ref="77e64fae08dcdc412e52b9c1cbdceddd" args=")(void *p, ExifLong s)" -->
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<td class="memname">typedef void*(* <a class="el" href="exif-mem_8h.html#77e64fae08dcdc412e52b9c1cbdceddd">ExifMemReallocFunc</a>)(void *p, ExifLong s) </td>
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Should work like realloc() <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>p</em> </td><td>the pointer to reallocate </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>s</em> </td><td>the size of the reallocated block </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>allocated memory </dd></dl>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="ace6f5e726c2225ae6d57a299e9e384f"></a><!-- doxytag: member="exif-mem.h::exif_mem_new" ref="ace6f5e726c2225ae6d57a299e9e384f" args="(ExifMemAllocFunc a, ExifMemReallocFunc r, ExifMemFreeFunc f)" -->
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<td class="memname"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a>* exif_mem_new </td>
<td>(</td>
<td class="paramtype"><a class="el" href="exif-mem_8h.html#8bfb570d7f9c7a2e686759e77e9d984c">ExifMemAllocFunc</a> </td>
<td class="paramname"> <em>a</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="exif-mem_8h.html#77e64fae08dcdc412e52b9c1cbdceddd">ExifMemReallocFunc</a> </td>
<td class="paramname"> <em>r</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="exif-mem_8h.html#9e5d88bc50fddc0eab10d86564d7a36b">ExifMemFreeFunc</a> </td>
<td class="paramname"> <em>f</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
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Create a new ExifMem <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>a</em> </td><td>the allocator function </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>r</em> </td><td>the reallocator function </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>f</em> </td><td>the free function </td></tr>
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<a class="anchor" name="cd2926c29b470c9d43f84567a84d5acb"></a><!-- doxytag: member="exif-mem.h::exif_mem_new_default" ref="cd2926c29b470c9d43f84567a84d5acb" args="(void)" -->
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<td class="memname"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a>* exif_mem_new_default </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"></td>
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The default ExifMem for your convenience <dl class="return" compact><dt><b>Returns:</b></dt><dd>return the default ExifMem </dd></dl>
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<a class="anchor" name="cedafabd958c9846ea3f908135715dcf"></a><!-- doxytag: member="exif-mem.h::exif_mem_ref" ref="cedafabd958c9846ea3f908135715dcf" args="(ExifMem *)" -->
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<td class="memname">void exif_mem_ref </td>
<td>(</td>
<td class="paramtype"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> * </td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"></td>
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Refcount an ExifMem
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<a class="anchor" name="dabd1345e1172ce379658cecfd3f7d70"></a><!-- doxytag: member="exif-mem.h::exif_mem_unref" ref="dabd1345e1172ce379658cecfd3f7d70" args="(ExifMem *)" -->
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<td class="memname">void exif_mem_unref </td>
<td>(</td>
<td class="paramtype"><a class="el" href="exif-mem_8h.html#ab8aacbc0ed6f11a1f022b7b1bf4750e">ExifMem</a> * </td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"></td>
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<p>
Unrefcount an ExifMem If the refcount reaches 0, the ExifMem is freed
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