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| author | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
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| committer | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
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diff --git a/docs/doxygen/nel/a02517.html b/docs/doxygen/nel/a02517.html new file mode 100644 index 00000000..c9a0848d --- /dev/null +++ b/docs/doxygen/nel/a02517.html @@ -0,0 +1,280 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> +<title>NeL: NLMISC::CFastMutexMP class Reference</title> +<link href="doxygen.css" rel="stylesheet" type="text/css"> +</head><body> +<!-- Generated by Doxygen 1.3.6 --> +<div class="qindex"> <form class="search" action="search.php" method="get"> +<a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="namespacemembers.html">Namespace Members</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related Pages</a> | <span class="search"><u>S</u>earch for <input class="search" type="text" name="query" value="" size="20" accesskey="s"/></span></form></div> +<h1>NLMISC::CFastMutexMP Class Reference</h1><code>#include <<a class="el" href="a06088.html">mutex.h</a>></code> +<p> +<hr><a name="_details"></a><h2>Detailed Description</h2> +Fast mutex for multiprocessor implementation (not fairly). Used for multiprocessor critical section synchronisation. The mutex ARE NOT recursive (ie don't call <a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa1">enter()</a> several times on the same mutex from the same thread without having called <a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa3">leave()</a>) ; The threads use a spin system to wait a little time before be put to sleep. It waits using CPU time.<p> +Implementation notes:<ul> +<li>Implementated under WIN32</li><li>Other OS use CMutex</li></ul> +<p> +<pre class="fragment"><div> <a class="code" href="a02517.html#NLMISC_1_1CFastMutexMPa0">CFastMutexMP</a> m; + m.enter (); + <span class="comment">// do critical stuffs</span> + m.leave (); + * +</div></pre><dl compact><dt><b>Author:</b></dt><dd>Cyril 'Hulud' Corvazier <p> +Olivier Cado <p> +Nevrax France </dd></dl> +<dl compact><dt><b>Date:</b></dt><dd>2002, 2003 </dd></dl> + +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00309">309</a> of file <a class="el" href="a06088.html">mutex.h</a>.<table border=0 cellpadding=0 cellspacing=0> +<tr><td></td></tr> +<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr> +<tr><td class="memItemLeft" nowrap align=right valign=top> </td><td class="memItemRight" valign=bottom><a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa0">CFastMutexMP</a> ()</td></tr> + +<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <a href="#NLMISC_1_1CFastMutexMPa0"></a><br><br></td></tr> +<tr><td class="memItemLeft" nowrap align=right valign=top>__forceinline void </td><td class="memItemRight" valign=bottom><a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa1">enter</a> () volatile</td></tr> + +<tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa2">init</a> () volatile</td></tr> + +<tr><td class="mdescLeft"> </td><td class="mdescRight">Same as constructor, useful for init in a shared memory block. <a href="#NLMISC_1_1CFastMutexMPa2"></a><br><br></td></tr> +<tr><td class="memItemLeft" nowrap align=right valign=top>__forceinline void </td><td class="memItemRight" valign=bottom><a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPa3">leave</a> () volatile</td></tr> + +<tr><td colspan=2><br><h2>Private Attributes</h2></td></tr> +<tr><td class="memItemLeft" nowrap align=right valign=top>volatile <a class="el" href="a04558.html#a11">uint32</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPr0">_Lock</a></td></tr> + +</table> +<hr><h2>Constructor & Destructor Documentation</h2> +<a class="anchor" name="NLMISC_1_1CFastMutexMPa0" doxytag="NLMISC::CFastMutexMP::CFastMutexMP" ></a><p> +<table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> + <tr> + <td class="mdRow"> + <table cellpadding="0" cellspacing="0" border="0"> + <tr> + <td class="md" nowrap valign="top"> NLMISC::CFastMutexMP::CFastMutexMP </td> + <td class="md" valign="top">( </td> + <td class="mdname1" valign="top" nowrap> </td> + <td class="md" valign="top"> ) </td> + <td class="md" nowrap><code> [inline]</code></td> + </tr> + + </table> + </td> + </tr> +</table> +<table cellspacing=5 cellpadding=0 border=0> + <tr> + <td> + + </td> + <td> + +<p> +Constructor. +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00314">314</a> of file <a class="el" href="a06088.html">mutex.h</a>. +<p> +<div class="fragment"><pre>00314 : <a class="code" href="a02517.html#NLMISC_1_1CFastMutexMPr0">_Lock</a>(0) {} +</pre></div> </td> + </tr> +</table> +<hr><h2>Member Function Documentation</h2> +<a class="anchor" name="NLMISC_1_1CFastMutexMPa1" doxytag="NLMISC::CFastMutexMP::enter" ></a><p> +<table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> + <tr> + <td class="mdRow"> + <table cellpadding="0" cellspacing="0" border="0"> + <tr> + <td class="md" nowrap valign="top"> __forceinline void NLMISC::CFastMutexMP::enter </td> + <td class="md" valign="top">( </td> + <td class="mdname1" valign="top" nowrap> </td> + <td class="md" valign="top"> ) </td> + <td class="md" nowrap> volatile<code> [inline]</code></td> + </tr> + + </table> + </td> + </tr> +</table> +<table cellspacing=5 cellpadding=0 border=0> + <tr> + <td> + + </td> + <td> + +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00320">320</a> of file <a class="el" href="a06088.html">mutex.h</a>. +<p> +References <a class="el" href="a05981.html#l00105">uint</a>. +<p> +<div class="fragment"><pre>00321 { +00322 <span class="comment">//std::cout << "Entering, Lock=" << _Lock << std::endl; </span> +00323 <span class="keywordflow">while</span> (CFastMutex::atomic_swap (&_Lock)) +00324 { +00325 <span class="keyword">static</span> <a class="code" href="a04558.html#a15">uint</a> last = 0; +00326 <span class="keyword">static</span> <a class="code" href="a04558.html#a15">uint</a> _max = 30; +00327 <a class="code" href="a04558.html#a15">uint</a> spinMax = _max; +00328 <a class="code" href="a04558.html#a15">uint</a> lastSpins = last; +00329 <span class="keyword">volatile</span> <a class="code" href="a04558.html#a15">uint</a> temp = 17; +00330 <a class="code" href="a04558.html#a15">uint</a> i; +00331 <span class="keywordflow">for</span> (i = 0; i < spinMax; ++i) +00332 { +00333 <span class="keywordflow">if</span> (i < lastSpins/2 || <a class="code" href="a02517.html#NLMISC_1_1CFastMutexMPr0">_Lock</a>) +00334 { +00335 temp *= temp; +00336 temp *= temp; +00337 temp *= temp; +00338 temp *= temp; +00339 } +00340 <span class="keywordflow">else</span> +00341 { +00342 <span class="keywordflow">if</span> (!CFastMutex::atomic_swap(&_Lock)) +00343 { +00344 last = i; +00345 _max = 1000; +00346 <span class="keywordflow">return</span>; +00347 } +00348 } +00349 } +00350 +00351 _max = 30; +00352 +00353 <span class="comment">// First test</span> +00354 <span class="keywordflow">for</span> (i = 0 ;; ++i) +00355 { +00356 <a class="code" href="a04558.html#a15">uint</a> wait_time = i + 6; +00357 +00358 <span class="comment">// Increment wait time with a log function</span> +00359 <span class="keywordflow">if</span> (wait_time > 27) +00360 wait_time = 27; +00361 +00362 <span class="comment">// Sleep</span> +00363 <span class="keywordflow">if</span> (wait_time <= 20) +00364 wait_time = 0; +00365 <span class="keywordflow">else</span> +00366 wait_time = 1 << (wait_time - 20); +00367 +00368 <span class="keywordflow">if</span> (!CFastMutex::atomic_swap (&_Lock)) +00369 <span class="keywordflow">break</span>; +00370 +00371 <span class="preprocessor">#ifdef NL_OS_WINDOWS</span> +00372 <span class="preprocessor"></span> Sleep (wait_time); +00373 <span class="preprocessor">#else</span> +00374 <span class="preprocessor"></span> <span class="comment">//std::cout << "Sleeping i=" << i << std::endl;</span> +00375 usleep( wait_time*1000 ); +00376 <span class="preprocessor">#endif </span> +00377 <span class="preprocessor"></span> } +00378 } +00379 } +</pre></div> </td> + </tr> +</table> +<a class="anchor" name="NLMISC_1_1CFastMutexMPa2" doxytag="NLMISC::CFastMutexMP::init" ></a><p> +<table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> + <tr> + <td class="mdRow"> + <table cellpadding="0" cellspacing="0" border="0"> + <tr> + <td class="md" nowrap valign="top"> void NLMISC::CFastMutexMP::init </td> + <td class="md" valign="top">( </td> + <td class="md" nowrap valign="top">void </td> + <td class="mdname1" valign="top" nowrap> </td> + <td class="md" valign="top"> ) </td> + <td class="md" nowrap> volatile<code> [inline]</code></td> + </tr> + + </table> + </td> + </tr> +</table> +<table cellspacing=5 cellpadding=0 border=0> + <tr> + <td> + + </td> + <td> + +<p> +Same as constructor, useful for init in a shared memory block. +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00317">317</a> of file <a class="el" href="a06088.html">mutex.h</a>. +<p> +<div class="fragment"><pre>00317 { <a class="code" href="a02517.html#NLMISC_1_1CFastMutexMPr0">_Lock</a> = 0; } +</pre></div> </td> + </tr> +</table> +<a class="anchor" name="NLMISC_1_1CFastMutexMPa3" doxytag="NLMISC::CFastMutexMP::leave" ></a><p> +<table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> + <tr> + <td class="mdRow"> + <table cellpadding="0" cellspacing="0" border="0"> + <tr> + <td class="md" nowrap valign="top"> __forceinline void NLMISC::CFastMutexMP::leave </td> + <td class="md" valign="top">( </td> + <td class="mdname1" valign="top" nowrap> </td> + <td class="md" valign="top"> ) </td> + <td class="md" nowrap> volatile<code> [inline]</code></td> + </tr> + + </table> + </td> + </tr> +</table> +<table cellspacing=5 cellpadding=0 border=0> + <tr> + <td> + + </td> + <td> + +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00382">382</a> of file <a class="el" href="a06088.html">mutex.h</a>. +<p> +<div class="fragment"><pre>00383 { +00384 <a class="code" href="a02517.html#NLMISC_1_1CFastMutexMPr0">_Lock</a> = 0; +00385 <span class="comment">//std::cout << "Leave" << std::endl;</span> +00386 } +</pre></div> </td> + </tr> +</table> +<hr><h2>Field Documentation</h2> +<a class="anchor" name="NLMISC_1_1CFastMutexMPr0" doxytag="NLMISC::CFastMutexMP::_Lock" ></a><p> +<table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> + <tr> + <td class="mdRow"> + <table cellpadding="0" cellspacing="0" border="0"> + <tr> + <td class="md" nowrap valign="top"> volatile <a class="el" href="a04558.html#a11">uint32</a> <a class="el" href="a02517.html#NLMISC_1_1CFastMutexMPr0">NLMISC::CFastMutexMP::_Lock</a><code> [private]</code> + </table> + </td> + </tr> +</table> +<table cellspacing=5 cellpadding=0 border=0> + <tr> + <td> + + </td> + <td> + +<p> + +<p> +Definition at line <a class="el" href="a06088.html#l00389">389</a> of file <a class="el" href="a06088.html">mutex.h</a>. </td> + </tr> +</table> +<hr>The documentation for this class was generated from the following file:<ul> +<li><a class="el" href="a06088.html">mutex.h</a></ul> +<hr size="1"><address style="align: right;"><small>Generated on Tue Mar 16 13:12:35 2004 for NeL by +<a href="http://www.doxygen.org/index.html"> +<img src="doxygen.png" alt="doxygen" align="middle" border=0 > +</a>1.3.6 </small></address> +</body> +</html> |