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<hr><h1>ost::SharedMemPager Class Reference</h1>The shared mempager uses a mutex to protect key access methods. mutex protected memory pager.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="misc_8h-source.html">misc.h</a>></code>
<p>
<p>Inheritance diagram for ost::SharedMemPager::
<p><center><img src="classost_1_1_shared_mem_pager.gif" usemap="#ost::SharedMemPager_map" border="0"></center>
<map name="ost::SharedMemPager_map">
<area href="classost_1_1_mem_pager.html" alt="ost::MemPager" shape="rect" coords="0,0,136,24">
<area href="classost_1_1_mutex.html" alt="ost::Mutex" shape="rect" coords="146,0,282,24">
</map>
<a href="classost_1_1_shared_mem_pager-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
<tr><td colspan=2><br><h2>Protected Methods</h2></td></tr>
<tr><td nowrap align=right valign=top> </td><td valign=bottom><a class="el" href="classost_1_1_shared_mem_pager.html#b0">SharedMemPager</a> (int pg=4096)</td></tr>
<tr><td> </td><td><font size=-1><em>Create a mempager mutex pool.</em> <a href="#b0">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="classost_1_1_shared_mem_pager.html#b1">purge</a> (void)</td></tr>
<tr><td> </td><td><font size=-1><em>Purge the memory pool while locked.</em> <a href="#b1">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void * </td><td valign=bottom><a class="el" href="classost_1_1_shared_mem_pager.html#b2">first</a> (size_t size)</td></tr>
<tr><td> </td><td><font size=-1><em>Get the first memory page after locking.</em> <a href="#b2">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void * </td><td valign=bottom><a class="el" href="classost_1_1_shared_mem_pager.html#b3">alloc</a> (size_t size)</td></tr>
<tr><td> </td><td><font size=-1><em>Get the last memory page after locking.</em> <a href="#b3">More...</a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
The shared mempager uses a mutex to protect key access methods. mutex protected memory pager.
<p>
This class is used when a mempager will be shared by multiple threads.
<p>
<dl compact><dt><b>
Author: </b><dd>
David Sugar <<a href="mailto:dyfet@ostel.com">dyfet@ostel.com</a>> </dl>
<p>
<hr><h2>Constructor & Destructor Documentation</h2>
<a name="b0" doxytag="ost::SharedMemPager::SharedMemPager"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> ost::SharedMemPager::SharedMemPager </td>
<td class="md">( </td>
<td class="md">int</td>
<td class="mdname1"> <em>pg</em> = 4096 </td>
<td class="md">) </td>
<td class="md"><code> [protected]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Create a mempager mutex pool.
<p>
<dl compact><dt><b>
Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pagesize
</em> </td><td>
for allocation. </td></tr>
</table>
</dl> </td>
</tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a name="b3" doxytag="ost::SharedMemPager::alloc"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void* ost::SharedMemPager::alloc </td>
<td class="md">( </td>
<td class="md">size_t</td>
<td class="mdname1"> <em>size</em> </td>
<td class="md">) </td>
<td class="md"><code> [protected, virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Get the last memory page after locking.
<p>
<dl compact><dt><b>
Returns: </b><dd>
allocated memory space. </dl><dl compact><dt><b>
Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>size
</em> </td><td>
of request. </td></tr>
</table>
</dl>
<p>
Reimplemented from <a class="el" href="classost_1_1_mem_pager.html#b1">ost::MemPager</a>. </td>
</tr>
</table>
<a name="b2" doxytag="ost::SharedMemPager::first"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void* ost::SharedMemPager::first </td>
<td class="md">( </td>
<td class="md">size_t</td>
<td class="mdname1"> <em>size</em> </td>
<td class="md">) </td>
<td class="md"><code> [protected, virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Get the first memory page after locking.
<p>
<dl compact><dt><b>
Returns: </b><dd>
allocated memory space. </dl><dl compact><dt><b>
Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>size
</em> </td><td>
of request. </td></tr>
</table>
</dl>
<p>
Reimplemented from <a class="el" href="classost_1_1_mem_pager.html#b0">ost::MemPager</a>. </td>
</tr>
</table>
<a name="b1" doxytag="ost::SharedMemPager::purge"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void ost::SharedMemPager::purge </td>
<td class="md">( </td>
<td class="md">void</td>
<td class="mdname1"> </td>
<td class="md">) </td>
<td class="md"><code> [protected]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Purge the memory pool while locked.
<p>
<p>
Reimplemented from <a class="el" href="classost_1_1_mem_pager.html#b5">ost::MemPager</a>. </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="misc_8h-source.html">misc.h</a></ul>
<hr><address><small>Generated at Fri Jan 4 18:51:50 2002 for CommonC++ by
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<img src="doxygen.gif" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.10 written by <a href="mailto:dimitri@stack.nl">Dimitri van Heesch</a>,
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