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Kamil Dudka

Share Library (C++)

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Jméno:StáhnoutclassShare_1_1SegmentHeader.html [Stáhnout]
Umístění: sharelib > api
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Poslední změna:2022-09-09 13:06

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<a class="el" href="namespaceShare.html">Share</a>::<a class="el" href="classShare_1_1SegmentHeader.html">SegmentHeader</a></div>
<h1>Share::SegmentHeader Class Reference<br>
<small>
[<a class="el" href="group__backend.html">Internal library classes</a>]</small>
</h1><!-- doxytag: class="Share::SegmentHeader" -->Object placed at begin of each shared segment.  
<a href="#_details">More...</a>
<p>
<code>#include &lt;<a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>&gt;</code>
<p>
Collaboration diagram for Share::SegmentHeader:<p><center><img src="classShare_1_1SegmentHeader__coll__graph.png" border="0" usemap="#Share_1_1SegmentHeader__coll__map" alt="Collaboration graph"></center>
<map name="Share_1_1SegmentHeader__coll__map">
<area shape="rect" href="classShare_1_1DefaultRefCounter.html" title="Reference counter for shared segment." alt="" coords="5,173,203,200"><area shape="rect" href="classShare_1_1DefaultAllocator.html" title="Allocator for blocks inside shared segment." alt="" coords="367,173,548,200"><area shape="rect" href="classShare_1_1RelocPtr.html" title="Relocable pointer type." alt="" coords="229,83,397,109"><area shape="rect" href="classShare_1_1SharedObject.html" title="Shareable object base class." alt="" coords="231,5,396,32"><area shape="rect" href="classShare_1_1Mutex.html" title="Platform&#45;independent mutex representation." alt="" coords="572,173,687,200"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classShare_1_1SegmentHeader-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="classShare_1_1RelocPtr.html">RelocPtr</a>&lt; char &gt;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#2492136cd7f2629f0e81338a45c53fd3">TStringZ</a></td></tr>
 
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Pointer to zero-ended string.  <a href="#2492136cd7f2629f0e81338a45c53fd3"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#301ae6e05328ca856c10414fdd8cca2c">SegmentHeader</a> (const char *name, size_t dataSize)</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">void *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#aef83550766950ecf2d74a969797f291">alloc</a> (size_t size)  throw (ShareException)</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#1ec62edd469fd96a56754f20b7f31bf8">free</a> (void *addr)  throw ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">size_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#5ac0ed81627dc142c24cb12f73f098a7">size</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">size_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#8093c34cf539244e821613fdfcc1aff4">available</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#bbc1bd0dedbcea66cfdbea14dd8e672e">notifyAttach</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#adfda4c3cf3faee32c2fc41441e43b0c">notifyDetach</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#5d1d9e5f5d82969f394ae6504fce7808">refCount</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#851f3de6f9fae54dfa4eecff94cfb388">unlink</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#51a71c13a68978068f76803752d70934">isUnlinked</a> ()</td></tr>
 
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#00b97ee020861f6d81d03156d3de616e">shouldBeDestroyed</a> ()</td></tr>
 
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static size_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#1534d8bf2f2dbcc34b34fcf051af791b">sizeNeeded</a> (const char *name, size_t dataSize)</td></tr>
 
<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classShare_1_1DefaultAllocator.html">TSegmentAllocator</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#6440e3c645955dd513fe48c14185cbff">allocator_</a></td></tr>
 
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">allocator  <a href="#6440e3c645955dd513fe48c14185cbff"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classShare_1_1DefaultRefCounter.html">TSegmentRefCounter</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#705ddb7cc3d588f31ebb54bfa34bd218">refCounter_</a></td></tr>
 
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">reference counter  <a href="#705ddb7cc3d588f31ebb54bfa34bd218"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classShare_1_1RelocPtr.html">TStringZ</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#0ac3a2495b6fbfa75a68b65861f22dda">mutexName_</a></td></tr>
 
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Pointer to mutex name (stored inside shared segment).  <a href="#0ac3a2495b6fbfa75a68b65861f22dda"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classShare_1_1Mutex.html">Mutex</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classShare_1_1SegmentHeader.html#f273561aa6ed429ae8bc43437e80c3c2">mutex_</a></td></tr>
 
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight"><a class="el" href="classShare_1_1Mutex.html" title="Platform-independent mutex representation.">Mutex</a> used to access members.  <a href="#f273561aa6ed429ae8bc43437e80c3c2"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Object placed at begin of each shared segment. 
<p>
It takes care about allocating blocks inside shared segment and counting references to shared segment.<p>
<dl class="note" compact><dt><b>Note:</b></dt><dd>This class use <a class="el" href="classShare_1_1Mutex.html" title="Platform-independent mutex representation.">Mutex</a> to acces its members. </dd></dl>
 
<p>
 
<p>
Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00027">27</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="2492136cd7f2629f0e81338a45c53fd3"></a><!-- doxytag: member="Share::SegmentHeader::TStringZ" ref="2492136cd7f2629f0e81338a45c53fd3" args="" -->
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          <td class="memname">typedef <a class="el" href="classShare_1_1RelocPtr.html">RelocPtr</a>&lt;char&gt; <a class="el" href="classShare_1_1RelocPtr.html">Share::SegmentHeader::TStringZ</a>          </td>
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<p>
Pointer to zero-ended string. 
<p>
 
<p>
Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00096">96</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.
</div>
</div><p>
<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="301ae6e05328ca856c10414fdd8cca2c"></a><!-- doxytag: member="Share::SegmentHeader::SegmentHeader" ref="301ae6e05328ca856c10414fdd8cca2c" args="(const char *name, size_t dataSize)" -->
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          <td class="memname">Share::SegmentHeader::SegmentHeader           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>dataSize</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"></td>
        </tr>
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<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>name</em>&nbsp;</td><td>Name of shared segment. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>dataSize</em>&nbsp;</td><td>Desired size of memory for data inside shared segment. </td></tr>
  </table>
</dl>
<dl class="note" compact><dt><b>Note:</b></dt><dd>Usable memory inside shared segment could be smaller due to free space fragmentation. </dd></dl>
 
</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="1534d8bf2f2dbcc34b34fcf051af791b"></a><!-- doxytag: member="Share::SegmentHeader::sizeNeeded" ref="1534d8bf2f2dbcc34b34fcf051af791b" args="(const char *name, size_t dataSize)" -->
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          <td class="memname">static size_t Share::SegmentHeader::sizeNeeded           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>dataSize</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"><code> [static]</code></td>
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<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>name</em>&nbsp;</td><td>Name of shared segment. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>dataSize</em>&nbsp;</td><td>Desired size of memory for data inside shared segment. </td></tr>
  </table>
</dl>
<dl class="note" compact><dt><b>Note:</b></dt><dd>Usable memory inside shared segment could be smaller due to free space fragmentation. </dd></dl>
 <dl class="return" compact><dt><b>Returns:</b></dt><dd>Return computed size of shred segment to allocate. </dd></dl>
 
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<a class="anchor" name="aef83550766950ecf2d74a969797f291"></a><!-- doxytag: member="Share::SegmentHeader::alloc" ref="aef83550766950ecf2d74a969797f291" args="(size_t size)" -->
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          <td class="memname">void* Share::SegmentHeader::alloc           </td>
          <td>(</td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>size</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%">  throw (<a class="el" href="classShare_1_1ShareException.html">ShareException</a>)</td>
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<p>
Allocate block of memory inside shared segment. <a class="el" href="classShare_1_1ShareException.html" title="General exception carrying text message inside.">ShareException</a> is thrown if not success. <dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>size</em>&nbsp;</td><td>Desired size of block to allocate. </td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return local address of allocated block on success. </dd></dl>
<dl compact><dt><b>Exceptions:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em><a class="el" href="classShare_1_1ShareException.html" title="General exception carrying text message inside.">ShareException</a></em>&nbsp;</td><td>Library-specific exception derived from std::bad_alloc </td></tr>
  </table>
</dl>
 
</div>
</div><p>
<a class="anchor" name="1ec62edd469fd96a56754f20b7f31bf8"></a><!-- doxytag: member="Share::SegmentHeader::free" ref="1ec62edd469fd96a56754f20b7f31bf8" args="(void *addr)" -->
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          <td class="memname">void Share::SegmentHeader::free           </td>
          <td>(</td>
          <td class="paramtype">void *&nbsp;</td>
          <td class="paramname"> <em>addr</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%">  throw ()</td>
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<p>
Free block of memory previously allocated by <a class="el" href="classShare_1_1DefaultAllocator.html#480fa43d32d40f9fbba2184bb61d91e2">alloc()</a> method. <dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>addr</em>&nbsp;</td><td>Address of block returned by <a class="el" href="classShare_1_1DefaultAllocator.html#480fa43d32d40f9fbba2184bb61d91e2">alloc()</a> method. </td></tr>
  </table>
</dl>
<dl class="attention" compact><dt><b>Attention:</b></dt><dd>All attached application may crash if this method is called with invalid address as parameter </dd></dl>
 
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<a class="anchor" name="5ac0ed81627dc142c24cb12f73f098a7"></a><!-- doxytag: member="Share::SegmentHeader::size" ref="5ac0ed81627dc142c24cb12f73f098a7" args="()" -->
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          <td class="memname">size_t Share::SegmentHeader::size           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
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<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return total size of memory for data inside shared segment. </dd></dl>
<dl class="note" compact><dt><b>Note:</b></dt><dd>Usable memory inside shared segment could be smaller due to free space fragmentation. </dd></dl>
 
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<a class="anchor" name="8093c34cf539244e821613fdfcc1aff4"></a><!-- doxytag: member="Share::SegmentHeader::available" ref="8093c34cf539244e821613fdfcc1aff4" args="()" -->
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          <td class="memname">size_t Share::SegmentHeader::available           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
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<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return size of available memory for data inside shared segment. </dd></dl>
 
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<a class="anchor" name="bbc1bd0dedbcea66cfdbea14dd8e672e"></a><!-- doxytag: member="Share::SegmentHeader::notifyAttach" ref="bbc1bd0dedbcea66cfdbea14dd8e672e" args="()" -->
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          <td class="memname">void Share::SegmentHeader::notifyAttach           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
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<p>
Client attach notification. This increase reference count.  
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<a class="anchor" name="adfda4c3cf3faee32c2fc41441e43b0c"></a><!-- doxytag: member="Share::SegmentHeader::notifyDetach" ref="adfda4c3cf3faee32c2fc41441e43b0c" args="()" -->
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          <td class="memname">void Share::SegmentHeader::notifyDetach           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
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<p>
Client detach notification. This decrease reference count.  
</div>
</div><p>
<a class="anchor" name="5d1d9e5f5d82969f394ae6504fce7808"></a><!-- doxytag: member="Share::SegmentHeader::refCount" ref="5d1d9e5f5d82969f394ae6504fce7808" args="()" -->
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          <td class="memname">int Share::SegmentHeader::refCount           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
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<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return current count of references. </dd></dl>
 
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<a class="anchor" name="851f3de6f9fae54dfa4eecff94cfb388"></a><!-- doxytag: member="Share::SegmentHeader::unlink" ref="851f3de6f9fae54dfa4eecff94cfb388" args="()" -->
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          <td class="memname">void Share::SegmentHeader::unlink           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
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<p>
Mark segment to be destroyed.  
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</div><p>
<a class="anchor" name="51a71c13a68978068f76803752d70934"></a><!-- doxytag: member="Share::SegmentHeader::isUnlinked" ref="51a71c13a68978068f76803752d70934" args="()" -->
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          <td class="memname">bool Share::SegmentHeader::isUnlinked           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
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<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return true if segment is marked to be destroyed. </dd></dl>
 
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<a class="anchor" name="00b97ee020861f6d81d03156d3de616e"></a><!-- doxytag: member="Share::SegmentHeader::shouldBeDestroyed" ref="00b97ee020861f6d81d03156d3de616e" args="()" -->
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          <td class="memname">bool Share::SegmentHeader::shouldBeDestroyed           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
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<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Return true if segment should be destroyed. This means, segment is unlinked and references count is zero. </dd></dl>
 
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</div><p>
<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="6440e3c645955dd513fe48c14185cbff"></a><!-- doxytag: member="Share::SegmentHeader::allocator_" ref="6440e3c645955dd513fe48c14185cbff" args="" -->
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          <td class="memname"><a class="el" href="classShare_1_1DefaultAllocator.html">TSegmentAllocator</a> <a class="el" href="classShare_1_1SegmentHeader.html#6440e3c645955dd513fe48c14185cbff">Share::SegmentHeader::allocator_</a><code> [protected]</code>          </td>
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allocator 
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Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00102">102</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.
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<a class="anchor" name="705ddb7cc3d588f31ebb54bfa34bd218"></a><!-- doxytag: member="Share::SegmentHeader::refCounter_" ref="705ddb7cc3d588f31ebb54bfa34bd218" args="" -->
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          <td class="memname"><a class="el" href="classShare_1_1DefaultRefCounter.html">TSegmentRefCounter</a> <a class="el" href="classShare_1_1SegmentHeader.html#705ddb7cc3d588f31ebb54bfa34bd218">Share::SegmentHeader::refCounter_</a><code> [protected]</code>          </td>
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<p>
reference counter 
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Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00107">107</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.
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<a class="anchor" name="0ac3a2495b6fbfa75a68b65861f22dda"></a><!-- doxytag: member="Share::SegmentHeader::mutexName_" ref="0ac3a2495b6fbfa75a68b65861f22dda" args="" -->
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          <td class="memname"><a class="el" href="classShare_1_1RelocPtr.html">TStringZ</a> <a class="el" href="classShare_1_1SegmentHeader.html#0ac3a2495b6fbfa75a68b65861f22dda">Share::SegmentHeader::mutexName_</a><code> [protected]</code>          </td>
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<p>
Pointer to mutex name (stored inside shared segment). 
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Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00112">112</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.
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<a class="anchor" name="f273561aa6ed429ae8bc43437e80c3c2"></a><!-- doxytag: member="Share::SegmentHeader::mutex_" ref="f273561aa6ed429ae8bc43437e80c3c2" args="" -->
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          <td class="memname"><a class="el" href="classShare_1_1Mutex.html">Mutex</a> <a class="el" href="classShare_1_1SegmentHeader.html#f273561aa6ed429ae8bc43437e80c3c2">Share::SegmentHeader::mutex_</a><code> [protected]</code>          </td>
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<a class="el" href="classShare_1_1Mutex.html" title="Platform-independent mutex representation.">Mutex</a> used to access members. 
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Definition at line <a class="el" href="SegmentHeader_8h-source.html#l00117">117</a> of file <a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a>.
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<hr>The documentation for this class was generated from the following file:<ul>
<li>sharelib/<a class="el" href="SegmentHeader_8h-source.html">SegmentHeader.h</a></ul>
<hr size="1"><address style="text-align: right;"><small>Generated on Sun Aug 26 17:43:02 2007 for ShareLibrary by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.2 </small></address>
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