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<li class="navelem"><a class="el" href="namespaceost.html">ost</a></li><li class="navelem"><a class="el" href="classost_1_1_shared_mem_pager.html">SharedMemPager</a></li> </ul>
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<a href="#pro-methods">Protected Member Functions</a> |
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<div class="title">ost::SharedMemPager Class Reference</div> </div>
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<p>The shared mempager uses a mutex to protect key access methods.
<a href="classost_1_1_shared_mem_pager.html#details">More...</a></p>
<p><code>#include <<a class="el" href="misc_8h_source.html">misc.h</a>></code></p>
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Inheritance diagram for ost::SharedMemPager:</div>
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<img src="classost_1_1_shared_mem_pager.png" usemap="#ost::SharedMemPager_map" alt=""/>
<map id="ost::SharedMemPager_map" name="ost::SharedMemPager_map">
<area href="classost_1_1_mem_pager.html" title="The memory pager is used to allocate cumulative memory pages for storing object specific "persistant"..." alt="ost::MemPager" shape="rect" coords="0,0,136,24"/>
<area href="classost_1_1_mutex.html" title="The Mutex class is used to protect a section of code so that at any given time only a single thread c..." alt="ost::Mutex" shape="rect" coords="146,0,282,24"/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:a6914e160b526068c31c0086134cbfbac"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_shared_mem_pager.html#a6914e160b526068c31c0086134cbfbac">SharedMemPager</a> (size_t pagesize=4096, const char *name=NULL)</td></tr>
<tr class="memdesc:a6914e160b526068c31c0086134cbfbac"><td class="mdescLeft"> </td><td class="mdescRight">Create a mempager mutex pool. <a href="#a6914e160b526068c31c0086134cbfbac">More...</a><br/></td></tr>
<tr class="separator:a6914e160b526068c31c0086134cbfbac"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afafb0b8ce31a2b1fdee64a5a9cadebc6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_shared_mem_pager.html#afafb0b8ce31a2b1fdee64a5a9cadebc6">purge</a> (void)</td></tr>
<tr class="memdesc:afafb0b8ce31a2b1fdee64a5a9cadebc6"><td class="mdescLeft"> </td><td class="mdescRight">Purge the memory pool while locked. <a href="#afafb0b8ce31a2b1fdee64a5a9cadebc6">More...</a><br/></td></tr>
<tr class="separator:afafb0b8ce31a2b1fdee64a5a9cadebc6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a644a00d48052aff83a180523b205aa6f"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_shared_mem_pager.html#a644a00d48052aff83a180523b205aa6f">first</a> (size_t size)</td></tr>
<tr class="memdesc:a644a00d48052aff83a180523b205aa6f"><td class="mdescLeft"> </td><td class="mdescRight">Get the first memory page after locking. <a href="#a644a00d48052aff83a180523b205aa6f">More...</a><br/></td></tr>
<tr class="separator:a644a00d48052aff83a180523b205aa6f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad5c3aad294fd247a972a72983dcf831b"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_shared_mem_pager.html#ad5c3aad294fd247a972a72983dcf831b">alloc</a> (size_t size)</td></tr>
<tr class="memdesc:ad5c3aad294fd247a972a72983dcf831b"><td class="mdescLeft"> </td><td class="mdescRight">Get the last memory page after locking. <a href="#ad5c3aad294fd247a972a72983dcf831b">More...</a><br/></td></tr>
<tr class="separator:ad5c3aad294fd247a972a72983dcf831b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pro_methods_classost_1_1_mem_pager"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classost_1_1_mem_pager')"><img src="closed.png" alt="-"/> Protected Member Functions inherited from <a class="el" href="classost_1_1_mem_pager.html">ost::MemPager</a></td></tr>
<tr class="memitem:a7ea4e6f82bffa66c994fcd10ebdee594 inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a7ea4e6f82bffa66c994fcd10ebdee594">first</a> (char *str)</td></tr>
<tr class="memdesc:a7ea4e6f82bffa66c994fcd10ebdee594 inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a string from the memory pager pool and copy the string into it's new memory area. <a href="#a7ea4e6f82bffa66c994fcd10ebdee594">More...</a><br/></td></tr>
<tr class="separator:a7ea4e6f82bffa66c994fcd10ebdee594 inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a245b6c4181ccccbabc52f1c3451f2fb6 inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a245b6c4181ccccbabc52f1c3451f2fb6">alloc</a> (const char *str)</td></tr>
<tr class="memdesc:a245b6c4181ccccbabc52f1c3451f2fb6 inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a string from the memory pager pool and copy the string inti it's new memory area. <a href="#a245b6c4181ccccbabc52f1c3451f2fb6">More...</a><br/></td></tr>
<tr class="separator:a245b6c4181ccccbabc52f1c3451f2fb6 inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5dc37c26af34d6f4c26e125eded3e2be inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a5dc37c26af34d6f4c26e125eded3e2be">MemPager</a> (size_t pagesize=4096)</td></tr>
<tr class="memdesc:a5dc37c26af34d6f4c26e125eded3e2be inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Create a paged memory pool for cumulative storage. <a href="#a5dc37c26af34d6f4c26e125eded3e2be">More...</a><br/></td></tr>
<tr class="separator:a5dc37c26af34d6f4c26e125eded3e2be inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5bfdb6f2d6f569ba08c32c59efb3a012 inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a5bfdb6f2d6f569ba08c32c59efb3a012">purge</a> (void)</td></tr>
<tr class="memdesc:a5bfdb6f2d6f569ba08c32c59efb3a012 inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">purge the current memory pool. <a href="#a5bfdb6f2d6f569ba08c32c59efb3a012">More...</a><br/></td></tr>
<tr class="separator:a5bfdb6f2d6f569ba08c32c59efb3a012 inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8efb94a243063ed1f9d1ddb315cb6042 inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a8efb94a243063ed1f9d1ddb315cb6042">clean</a> (void)</td></tr>
<tr class="memdesc:a8efb94a243063ed1f9d1ddb315cb6042 inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Clean for memory cleanup before exiting. <a href="#a8efb94a243063ed1f9d1ddb315cb6042">More...</a><br/></td></tr>
<tr class="separator:a8efb94a243063ed1f9d1ddb315cb6042 inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a58dcf48146eca4ae2286706968fdf9c5 inherit pro_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a58dcf48146eca4ae2286706968fdf9c5">~MemPager</a> ()</td></tr>
<tr class="memdesc:a58dcf48146eca4ae2286706968fdf9c5 inherit pro_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Delete the memory pool and all allocated memory. <a href="#a58dcf48146eca4ae2286706968fdf9c5">More...</a><br/></td></tr>
<tr class="separator:a58dcf48146eca4ae2286706968fdf9c5 inherit pro_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pub_methods_classost_1_1_mem_pager"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classost_1_1_mem_pager')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classost_1_1_mem_pager.html">ost::MemPager</a></td></tr>
<tr class="memitem:a320897ecfca3e92378c45ec70aee58ba inherit pub_methods_classost_1_1_mem_pager"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mem_pager.html#a320897ecfca3e92378c45ec70aee58ba">getPages</a> (void)</td></tr>
<tr class="memdesc:a320897ecfca3e92378c45ec70aee58ba inherit pub_methods_classost_1_1_mem_pager"><td class="mdescLeft"> </td><td class="mdescRight">Return the total number of pages that have been allocated for this memory pool. <a href="#a320897ecfca3e92378c45ec70aee58ba">More...</a><br/></td></tr>
<tr class="separator:a320897ecfca3e92378c45ec70aee58ba inherit pub_methods_classost_1_1_mem_pager"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_classost_1_1_mutex"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classost_1_1_mutex')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classost_1_1_mutex.html">ost::Mutex</a></td></tr>
<tr class="memitem:a22e6ce5d9d8d209dac70e39310459202 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#a22e6ce5d9d8d209dac70e39310459202">Mutex</a> (const char *name=NULL)</td></tr>
<tr class="memdesc:a22e6ce5d9d8d209dac70e39310459202 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">The mutex is always initialized as a recursive entity. <a href="#a22e6ce5d9d8d209dac70e39310459202">More...</a><br/></td></tr>
<tr class="separator:a22e6ce5d9d8d209dac70e39310459202 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5ccc1c2e7278d8adc47fd728706c33a8 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#a5ccc1c2e7278d8adc47fd728706c33a8">~Mutex</a> ()</td></tr>
<tr class="memdesc:a5ccc1c2e7278d8adc47fd728706c33a8 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Destroying the mutex removes any system resources associated with it. <a href="#a5ccc1c2e7278d8adc47fd728706c33a8">More...</a><br/></td></tr>
<tr class="separator:a5ccc1c2e7278d8adc47fd728706c33a8 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abed8b05b63f9cdd2c9ca1f92081b1a8a inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#abed8b05b63f9cdd2c9ca1f92081b1a8a">nameMutex</a> (const char *name)</td></tr>
<tr class="memdesc:abed8b05b63f9cdd2c9ca1f92081b1a8a inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Enable setting of mutex name for deadlock debug. <a href="#abed8b05b63f9cdd2c9ca1f92081b1a8a">More...</a><br/></td></tr>
<tr class="separator:abed8b05b63f9cdd2c9ca1f92081b1a8a inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adc1471d0c2114e5c49e1fe7152448378 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#adc1471d0c2114e5c49e1fe7152448378">enterMutex</a> (void)</td></tr>
<tr class="memdesc:adc1471d0c2114e5c49e1fe7152448378 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Entering a <a class="el" href="classost_1_1_mutex.html" title="The Mutex class is used to protect a section of code so that at any given time only a single thread c...">Mutex</a> locks the mutex for the current thread. <a href="#adc1471d0c2114e5c49e1fe7152448378">More...</a><br/></td></tr>
<tr class="separator:adc1471d0c2114e5c49e1fe7152448378 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aecb516325583e432bf2bf7e4b565f6f6 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#aecb516325583e432bf2bf7e4b565f6f6">enter</a> (void)</td></tr>
<tr class="memdesc:aecb516325583e432bf2bf7e4b565f6f6 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Future abi will use enter/leave/test members. <a href="#aecb516325583e432bf2bf7e4b565f6f6">More...</a><br/></td></tr>
<tr class="separator:aecb516325583e432bf2bf7e4b565f6f6 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab6aaecac9c95d31a5862014d7f1afe73 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#ab6aaecac9c95d31a5862014d7f1afe73">leave</a> (void)</td></tr>
<tr class="memdesc:ab6aaecac9c95d31a5862014d7f1afe73 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Future abi will use enter/leave/test members. <a href="#ab6aaecac9c95d31a5862014d7f1afe73">More...</a><br/></td></tr>
<tr class="separator:ab6aaecac9c95d31a5862014d7f1afe73 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac1ff5454b2c9b55790c4bf33f751704c inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#ac1ff5454b2c9b55790c4bf33f751704c">test</a> (void)</td></tr>
<tr class="memdesc:ac1ff5454b2c9b55790c4bf33f751704c inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Future abi will use enter/leave/test members. <a href="#ac1ff5454b2c9b55790c4bf33f751704c">More...</a><br/></td></tr>
<tr class="separator:ac1ff5454b2c9b55790c4bf33f751704c inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa46b490ac92017ef89980b0020bff8c0 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#aa46b490ac92017ef89980b0020bff8c0">tryEnterMutex</a> (void)</td></tr>
<tr class="memdesc:aa46b490ac92017ef89980b0020bff8c0 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Tries to lock the mutex for the current thread. <a href="#aa46b490ac92017ef89980b0020bff8c0">More...</a><br/></td></tr>
<tr class="separator:aa46b490ac92017ef89980b0020bff8c0 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a403208d275c4c7b8087a40259b0cb0f3 inherit pub_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#a403208d275c4c7b8087a40259b0cb0f3">leaveMutex</a> (void)</td></tr>
<tr class="memdesc:a403208d275c4c7b8087a40259b0cb0f3 inherit pub_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Leaving a mutex frees that mutex for use by another thread. <a href="#a403208d275c4c7b8087a40259b0cb0f3">More...</a><br/></td></tr>
<tr class="separator:a403208d275c4c7b8087a40259b0cb0f3 inherit pub_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_static_methods_classost_1_1_mutex"><td colspan="2" onclick="javascript:toggleInherit('pub_static_methods_classost_1_1_mutex')"><img src="closed.png" alt="-"/> Static Public Member Functions inherited from <a class="el" href="classost_1_1_mutex.html">ost::Mutex</a></td></tr>
<tr class="memitem:a83b66f786e344b5192a3993d319aa735 inherit pub_static_methods_classost_1_1_mutex"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classost_1_1_mutex.html#a83b66f786e344b5192a3993d319aa735">setDebug</a> (bool mode)</td></tr>
<tr class="memdesc:a83b66f786e344b5192a3993d319aa735 inherit pub_static_methods_classost_1_1_mutex"><td class="mdescLeft"> </td><td class="mdescRight">Enable or disable deadlock debugging. <a href="#a83b66f786e344b5192a3993d319aa735">More...</a><br/></td></tr>
<tr class="separator:a83b66f786e344b5192a3993d319aa735 inherit pub_static_methods_classost_1_1_mutex"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>The shared mempager uses a mutex to protect key access methods. </p>
<p>This class is used when a mempager will be shared by multiple threads.</p>
<dl class="section author"><dt>Author</dt><dd>David Sugar <a href="#" onclick="location.href='mai'+'lto:'+'dyf'+'et'+'@os'+'te'+'l.c'+'om'; return false;">dyfet<span style="display: none;">.nosp@m.</span>@ost<span style="display: none;">.nosp@m.</span>el.co<span style="display: none;">.nosp@m.</span>m</a> mutex protected memory pager. </dd></dl>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="memname">ost::SharedMemPager::SharedMemPager </td>
<td>(</td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>pagesize</em> = <code>4096</code>, </td>
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<td class="paramtype">const char * </td>
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<p>Create a mempager mutex pool. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">pagesize</td><td>page size for allocation. </td></tr>
<tr><td class="paramname">name</td><td>a name for the pool. </td></tr>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void* ost::SharedMemPager::alloc </td>
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<td class="paramtype">size_t </td>
<td class="paramname"><em>size</em></td><td>)</td>
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<p>Get the last memory page after locking. </p>
<dl class="section return"><dt>Returns</dt><dd>allocated memory space. </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">size</td><td>of request. </td></tr>
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<p>Reimplemented from <a class="el" href="classost_1_1_mem_pager.html#a3a03cb50bd4084ddbf6314ec0339d176">ost::MemPager</a>.</p>
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<td class="memname">void* ost::SharedMemPager::first </td>
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<td class="paramname"><em>size</em></td><td>)</td>
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<p>Get the first memory page after locking. </p>
<dl class="section return"><dt>Returns</dt><dd>allocated memory space. </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">size</td><td>of request. </td></tr>
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<p>Reimplemented from <a class="el" href="classost_1_1_mem_pager.html#a2c82ac4c97fcba81c643966973e78d84">ost::MemPager</a>.</p>
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<td class="memname">void ost::SharedMemPager::purge </td>
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<p>Purge the memory pool while locked. </p>
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<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></li>
</ul>
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