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<title>Apache Portable Runtime Utility Library: Relocatable Memory Management Routines</title>
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<h1>Relocatable Memory Management Routines<br>
<small>
[<a class="el" href="group___a_p_r___util.html">APR Utility Functions</a>]</small>
</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef struct <a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef apr_size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g65ebaca1a86f0667156592f40b81b681">apr_rmm_init</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> **rmm, <a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> *lock, void *membuf, apr_size_t memsize, apr_pool_t *cont)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g8ccae93038489f2acb7588292df5d80a">apr_rmm_destroy</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#gdf144b4071c5c4d85cded37ca0e58dff">apr_rmm_attach</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> **rmm, <a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> *lock, void *membuf, apr_pool_t *cont)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g2171746dcfa1e0f07717224ad106091e">apr_rmm_detach</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g31e42a7c40bbd3f7f132eaf347a79d32">apr_rmm_malloc</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, apr_size_t reqsize)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g78561452a8fb3fef18f1203efaa0b92f">apr_rmm_realloc</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, void *entity, apr_size_t reqsize)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g12ff2a4c23548e2f1616a17734defaf8">apr_rmm_calloc</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, apr_size_t reqsize)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#gd22b65c95d0964e37aecd4134294b016">apr_rmm_free</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, <a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> entity)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g6bf67e9f2d08f9f36d2c420648d8d3a0">apr_rmm_addr_get</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, <a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> entity)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#g3ed2e880ebc695aa8dd241e21b5a666e">apr_rmm_offset_get</a> (<a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> *rmm, void *entity)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">apr_size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___a_p_r___util___r_m_m.html#ge638ec990cb1600f6f70a8b3a1e07ff8">apr_rmm_overhead_get</a> (int n)</td></tr>
</table>
<hr><h2>Typedef Documentation</h2>
<a class="anchor" name="g70b508c81a0bc75350efdefb3410af12"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_off_t" ref="g70b508c81a0bc75350efdefb3410af12" args="" -->
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<td class="memname">typedef apr_size_t <a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td>
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<p>
Fundamental allocation unit, within a specific apr_rmm_t
</div>
</div><p>
<a class="anchor" name="gdb4d418c417ece33c4430ba9df59070a"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_t" ref="gdb4d418c417ece33c4430ba9df59070a" args="" -->
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<td class="memname">typedef struct <a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> <a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> </td>
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<p>
Structure to access Relocatable, Managed Memory
</div>
</div><p>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="g6bf67e9f2d08f9f36d2c420648d8d3a0"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_addr_get" ref="g6bf67e9f2d08f9f36d2c420648d8d3a0" args="(apr_rmm_t *rmm, apr_rmm_off_t entity)" -->
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<td class="memname">void* apr_rmm_addr_get </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
<td class="paramname"> <em>rmm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td>
<td class="paramname"> <em>entity</em></td><td> </td>
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Retrieve the physical address of a relocatable allocation of memory <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>entity</em> </td><td>The memory allocation to free </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>address The address, aligned with APR_ALIGN_DEFAULT. </dd></dl>
</div>
</div><p>
<a class="anchor" name="gdf144b4071c5c4d85cded37ca0e58dff"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_attach" ref="gdf144b4071c5c4d85cded37ca0e58dff" args="(apr_rmm_t **rmm, apr_anylock_t *lock, void *membuf, apr_pool_t *cont)" -->
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<td class="memname">apr_status_t apr_rmm_attach </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> ** </td>
<td class="paramname"> <em>rmm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> * </td>
<td class="paramname"> <em>lock</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"> <em>membuf</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">apr_pool_t * </td>
<td class="paramname"> <em>cont</em></td><td> </td>
</tr>
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<td>)</td>
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Attach to a relocatable memory block already managed by the apr_rmm API. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lock</em> </td><td>An <a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> of the appropriate type of lock </td></tr>
<tr><td valign="top"></td><td valign="top"><em>membuf</em> </td><td>The block of relocatable memory already under management </td></tr>
<tr><td valign="top"></td><td valign="top"><em>cont</em> </td><td>The pool to use for local storage and management </td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="g12ff2a4c23548e2f1616a17734defaf8"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_calloc" ref="g12ff2a4c23548e2f1616a17734defaf8" args="(apr_rmm_t *rmm, apr_size_t reqsize)" -->
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<td class="memname"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> apr_rmm_calloc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
<td class="paramname"> <em>rmm</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">apr_size_t </td>
<td class="paramname"> <em>reqsize</em></td><td> </td>
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<td>)</td>
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<p>
Allocate memory from the block of relocatable memory and initialize it to zero. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>reqsize</em> </td><td>How much memory to allocate </td></tr>
</table>
</dl>
</div>
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<a class="anchor" name="g8ccae93038489f2acb7588292df5d80a"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_destroy" ref="g8ccae93038489f2acb7588292df5d80a" args="(apr_rmm_t *rmm)" -->
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<td class="memname">apr_status_t apr_rmm_destroy </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
<td class="paramname"> <em>rmm</em> </td>
<td> ) </td>
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Destroy a managed memory block. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block to destroy </td></tr>
</table>
</dl>
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<a class="anchor" name="g2171746dcfa1e0f07717224ad106091e"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_detach" ref="g2171746dcfa1e0f07717224ad106091e" args="(apr_rmm_t *rmm)" -->
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<td class="memname">apr_status_t apr_rmm_detach </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
<td class="paramname"> <em>rmm</em> </td>
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Detach from the managed block of memory. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block to detach from </td></tr>
</table>
</dl>
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<a class="anchor" name="gd22b65c95d0964e37aecd4134294b016"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_free" ref="gd22b65c95d0964e37aecd4134294b016" args="(apr_rmm_t *rmm, apr_rmm_off_t entity)" -->
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<td class="memname">apr_status_t apr_rmm_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
<td class="paramname"> <em>rmm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> </td>
<td class="paramname"> <em>entity</em></td><td> </td>
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<p>
Free allocation returned by apr_rmm_malloc or apr_rmm_calloc. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>entity</em> </td><td>The memory allocation to free </td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="g65ebaca1a86f0667156592f40b81b681"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_init" ref="g65ebaca1a86f0667156592f40b81b681" args="(apr_rmm_t **rmm, apr_anylock_t *lock, void *membuf, apr_size_t memsize, apr_pool_t *cont)" -->
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<td class="memname">apr_status_t apr_rmm_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> ** </td>
<td class="paramname"> <em>rmm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> * </td>
<td class="paramname"> <em>lock</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"> <em>membuf</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">apr_size_t </td>
<td class="paramname"> <em>memsize</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">apr_pool_t * </td>
<td class="paramname"> <em>cont</em></td><td> </td>
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<p>
Initialize a relocatable memory block to be managed by the apr_rmm API. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lock</em> </td><td>An <a class="el" href="structapr__anylock__t.html">apr_anylock_t</a> of the appropriate type of lock, or NULL if no locking is required. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>membuf</em> </td><td>The block of relocatable memory to be managed </td></tr>
<tr><td valign="top"></td><td valign="top"><em>memsize</em> </td><td>The size of relocatable memory block to be managed </td></tr>
<tr><td valign="top"></td><td valign="top"><em>cont</em> </td><td>The pool to use for local storage and management </td></tr>
</table>
</dl>
<dl class="remark" compact><dt><b>Remarks:</b></dt><dd>Both </dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>membuf</em> </td><td>and </td></tr>
<tr><td valign="top"></td><td valign="top"><em>memsize</em> </td><td>must be aligned (for instance using APR_ALIGN_DEFAULT). </td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="g31e42a7c40bbd3f7f132eaf347a79d32"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_malloc" ref="g31e42a7c40bbd3f7f132eaf347a79d32" args="(apr_rmm_t *rmm, apr_size_t reqsize)" -->
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<td class="memname"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> apr_rmm_malloc </td>
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<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
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Allocate memory from the block of relocatable memory. <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>reqsize</em> </td><td>How much memory to allocate </td></tr>
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<a class="anchor" name="g3ed2e880ebc695aa8dd241e21b5a666e"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_offset_get" ref="g3ed2e880ebc695aa8dd241e21b5a666e" args="(apr_rmm_t *rmm, void *entity)" -->
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<td class="memname"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> apr_rmm_offset_get </td>
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<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
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Compute the offset of a relocatable allocation of memory <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>entity</em> </td><td>The physical address to convert to an offset </td></tr>
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<a class="anchor" name="ge638ec990cb1600f6f70a8b3a1e07ff8"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_overhead_get" ref="ge638ec990cb1600f6f70a8b3a1e07ff8" args="(int n)" -->
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<td class="memname">apr_size_t apr_rmm_overhead_get </td>
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Compute the required overallocation of memory needed to fit n allocs <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>n</em> </td><td>The number of alloc/calloc regions desired </td></tr>
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<a class="anchor" name="g78561452a8fb3fef18f1203efaa0b92f"></a><!-- doxytag: member="apr_rmm.h::apr_rmm_realloc" ref="g78561452a8fb3fef18f1203efaa0b92f" args="(apr_rmm_t *rmm, void *entity, apr_size_t reqsize)" -->
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<td class="memname"><a class="el" href="group___a_p_r___util___r_m_m.html#g70b508c81a0bc75350efdefb3410af12">apr_rmm_off_t</a> apr_rmm_realloc </td>
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<td class="paramtype"><a class="el" href="group___a_p_r___util___r_m_m.html#gdb4d418c417ece33c4430ba9df59070a">apr_rmm_t</a> * </td>
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Realloc memory from the block of relocatable memory. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>rmm</em> </td><td>The relocatable memory block </td></tr>
<tr><td valign="top"></td><td valign="top"><em>entity</em> </td><td>The memory allocation to realloc </td></tr>
<tr><td valign="top"></td><td valign="top"><em>reqsize</em> </td><td>The new size </td></tr>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Jan 24 02:22:55 2008 for Apache Portable Runtime Utility Library by
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