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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>NeL: NLMISC::CTime class Reference</title>
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<h1>NLMISC::CTime Class Reference</h1><code>#include <<a class="el" href="a06553.html">time_nl.h</a>></code>
<p>
<p>Inheritance diagram for NLMISC::CTime:
<p><center><img src="a02142.png" usemap="#NLMISC::CTime_map" border="0" alt=""></center>
<map name="NLMISC::CTime_map">
<area href="a02141.html" alt="NLNET::_CUniTime" shape="rect" coords="0,56,118,80">
</map>
<hr><a name="_details"></a><h2>Detailed Description</h2>
This class provide a independant local time system. <dl compact><dt><b>Author:</b></dt><dd>Vianney Lecroart <p>
Nevrax France </dd></dl>
<dl compact><dt><b>Date:</b></dt><dd>2000 </dd></dl>
<p>
<p>
Definition at line <a class="el" href="a06553.html#l00057">57</a> of file <a class="el" href="a06553.html">time_nl.h</a>.<table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a05378.html#a242">TTime</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02142.html#NLMISC_1_1CTimee0">getLocalTime</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a05378.html#a243">TTicks</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02142.html#NLMISC_1_1CTimee1">getPerformanceTime</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a04558.html#a11">uint32</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02142.html#NLMISC_1_1CTimee2">getSecondsSince1970</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>double </td><td class="memItemRight" valign=bottom><a class="el" href="a02142.html#NLMISC_1_1CTimee3">ticksToSecond</a> (<a class="el" href="a05378.html#a243">TTicks</a> ticks)</td></tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="NLMISC_1_1CTimee0" doxytag="NLMISC::CTime::getLocalTime" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top"> <a class="el" href="a05378.html#a242">TTime</a> NLMISC::CTime::getLocalTime </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> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
get the time in millisecond. It's a <b>local</b> time, it means that the value is <b>different</b> on 2 differents computers. Use the CUniTime to get a universal time that is the same on all computers. <dl compact><dt><b>Warning:</b></dt><dd>On Windows, the value is on 32 bits only.</dd></dl>
<p>
Definition at line <a class="el" href="a06552.html#l00055">55</a> of file <a class="el" href="a06552.html">time_nl.cpp</a>.
<p>
References <a class="el" href="a06552.html#l00105">getPerformanceTime()</a>, <a class="el" href="a05622.html#l00154">nlerror</a>, and <a class="el" href="a06553.html#l00047">NLMISC::TTime</a>.
<p>
Referenced by <a class="el" href="a05416.html#l00396">NLAIAGENT::CAgentWatchTimer::attach()</a>, <a class="el" href="a05466.html#l00565">NLSOUND::CAudioMixerUser::curTime()</a>, <a class="el" href="a06737.html#l01170">NL3D::CWaterModel::doSimpleRender()</a>, <a class="el" href="a05593.html#l00441">NLSOUND::CComplexSource::getTime()</a>, <a class="el" href="a05926.html#l00145">loadForm()</a>, <a class="el" href="a05593.html#l00577">NLSOUND::CComplexSource::onEvent()</a>, <a class="el" href="a05593.html#l00456">NLSOUND::CComplexSource::onUpdate()</a>, <a class="el" href="a05593.html#l00105">NLSOUND::CComplexSource::playStuf()</a>, <a class="el" href="a05416.html#l00140">NLAIAGENT::CAgentManagerTimer::CRunTimer::run()</a>, <a class="el" href="a05416.html#l00631">NLAIAGENT::CAgentClockTimer::runActivity()</a>, <a class="el" href="a05416.html#l00280">NLAIAGENT::CAgentWatchTimer::runActivity()</a>, <a class="el" href="a06737.html#l00831">NL3D::CWaterModel::setupMaterialNVertexShader()</a>, <a class="el" href="a06552.html#l00143">ticksToSecond()</a>, <a class="el" href="a06420.html#l00679">NLSOUND::CSoundDriverDSound::TimerCallback()</a>, <a class="el" href="a06420.html#l00703">NLSOUND::CSoundDriverDSound::update()</a>, <a class="el" href="a05465.html#l01268">NLSOUND::CAudioMixerUser::update()</a>, and <a class="el" href="a05471.html#l00861">NLSOUND::CBackgroundSoundManager::updateBackgroundStatus()</a>.
<p>
<div class="fragment"><pre>00056 {
00057 <span class="preprocessor">#ifdef NL_OS_WINDOWS</span>
00058 <span class="preprocessor"></span>
00059 <span class="keyword">static</span> <span class="keywordtype">bool</span> byperfcounter;
00060 <span class="keyword">static</span> <span class="keywordtype">bool</span> initdone = <span class="keyword">false</span>;
00061
00062 <span class="comment">// Initialization</span>
00063 <span class="keywordflow">if</span> ( ! initdone )
00064 {
00065 byperfcounter = (<a class="code" href="a02142.html#NLMISC_1_1CTimee1">getPerformanceTime</a>() != 0);
00066 initdone = <span class="keyword">true</span>;
00067 }
00068
00069 <span class="comment">/* Retrieve time is ms</span>
00070 <span class="comment"> * Why do we prefer getPerformanceTime() to timeGetTime() ? Because on one dual-processor Win2k</span>
00071 <span class="comment"> * PC, we have noticed that timeGetTime() slows down when the client is running !!!</span>
00072 <span class="comment"> */</span>
00073
00074
00075 <span class="comment">/* Now we have noticed that on all WinNT4 PC the getPerformanceTime can give us value that</span>
00076 <span class="comment"> * are less than previous</span>
00077 <span class="comment"> */</span>
00078
00079 <span class="comment">//if ( byperfcounter )</span>
00080 <span class="comment">//{</span>
00081 <span class="comment">// return (TTime)(ticksToSecond(getPerformanceTime()) * 1000.0f);</span>
00082 <span class="comment">//}</span>
00083 <span class="comment">//else</span>
00084 <span class="comment">//{</span>
00085 <span class="keywordflow">return</span> timeGetTime();
00086 <span class="comment">//}</span>
00087
00088 <span class="preprocessor">#elif defined (NL_OS_UNIX)</span>
00089 <span class="preprocessor"></span>
00090 <span class="keyword">struct </span>timeval tv;
00091
00092 <span class="keywordflow">if</span> ( gettimeofday( &tv, NULL) == -1 )
00093 {
00094 <a class="code" href="a04199.html#a3">nlerror</a> (<span class="stringliteral">"Cannot get time of day."</span>);
00095 }
00096 <span class="keywordflow">return</span> (<a class="code" href="a05378.html#a242">TTime</a>)tv.tv_sec * (<a class="code" href="a05378.html#a242">TTime</a>)1000 + (<a class="code" href="a05378.html#a242">TTime</a>)tv.tv_usec / (<a class="code" href="a05378.html#a242">TTime</a>)1000;
00097
00098 <span class="preprocessor">#endif</span>
00099 <span class="preprocessor"></span>}
</pre></div> </td>
</tr>
</table>
<a class="anchor" name="NLMISC_1_1CTimee1" doxytag="NLMISC::CTime::getPerformanceTime" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top"> <a class="el" href="a05378.html#a243">TTicks</a> NLMISC::CTime::getPerformanceTime </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> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
get the time in processor ticks. Use it for profile purpose. Only implemented under windows for the time. If the performance time is not supported on this hardware, it returns 0.
<p>
Definition at line <a class="el" href="a06552.html#l00105">105</a> of file <a class="el" href="a06552.html">time_nl.cpp</a>.
<p>
References <a class="el" href="a05622.html#l00135">nlwarning</a>, <a class="el" href="a06553.html#l00048">NLMISC::TTicks</a>, and <a class="el" href="a05646.html#l00236">x</a>.
<p>
Referenced by <a class="el" href="a06552.html#l00055">getLocalTime()</a>, <a class="el" href="a06479.html#l00441">NLMISC::CSystemInfo::getProcessorFrequency()</a>, <a class="el" href="a05412.html#l01628">NLAIAGENT::CAgentScript::run()</a>, <a class="el" href="a05412.html#l01284">NLAIAGENT::CAgentScript::sendMessage()</a>, and <a class="el" href="a06552.html#l00143">ticksToSecond()</a>.
<p>
<div class="fragment"><pre>00106 {
00107 <span class="preprocessor">#ifdef NL_OS_WINDOWS</span>
00108 <span class="preprocessor"></span> LARGE_INTEGER ret;
00109 <span class="keywordflow">if</span> (QueryPerformanceCounter (&ret))
00110 <span class="keywordflow">return</span> ret.QuadPart;
00111 <span class="keywordflow">else</span>
00112 <span class="keywordflow">return</span> 0;
00113 <span class="preprocessor">#else // NL_OS_WINDOWS</span>
00114 <span class="preprocessor"></span>
00115 <span class="preprocessor">#ifdef HAVE_X86</span>
00116 <span class="preprocessor"></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="a04223.html#a572">x</a>;
00117 __asm__ <span class="keyword">volatile</span> (<span class="stringliteral">".byte 0x0f, 0x31"</span> : <span class="stringliteral">"=A"</span> (<a class="code" href="a04223.html#a572">x</a>));
00118 <span class="keywordflow">return</span> <a class="code" href="a04223.html#a572">x</a>;
00119 <span class="preprocessor">#else // HAVE_X86</span>
00120 <span class="preprocessor"></span> <span class="keyword">static</span> <span class="keywordtype">bool</span> firstWarn = <span class="keyword">true</span>;
00121 <span class="keywordflow">if</span> (firstWarn)
00122 {
00123 <a class="code" href="a04199.html#a2">nlwarning</a> (<span class="stringliteral">"TTicks CTime::getPerformanceTime () is not implemented for your processor, returning 0"</span>);
00124 firstWarn = <span class="keyword">false</span>;
00125 }
00126 <span class="keywordflow">return</span> 0;
00127 <span class="preprocessor">#endif // HAVE_X86</span>
00128 <span class="preprocessor"></span>
00129 <span class="preprocessor">#endif // NL_OS_WINDOWS</span>
00130 <span class="preprocessor"></span>}
</pre></div> </td>
</tr>
</table>
<a class="anchor" name="NLMISC_1_1CTimee2" doxytag="NLMISC::CTime::getSecondsSince1970" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="a04558.html#a11">uint32</a> NLMISC::CTime::getSecondsSince1970 </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> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
returns the number of second since midnight (00:00:00), January 1, 1970, coordinated universal time, according to the system clock. This values is the same on all computer if computers are synchronized (with NTP for example).
<p>
Definition at line <a class="el" href="a06552.html#l00045">45</a> of file <a class="el" href="a06552.html">time_nl.cpp</a>.
<p>
References <a class="el" href="a05981.html#l00100">uint32</a>.
<p>
Referenced by <a class="el" href="a06033.html#l00258">NLAINIMAT::CMHiCSagent::CTemporaryPriority::CTemporaryPriority()</a>, and <a class="el" href="a06032.html#l01219">NLAINIMAT::CMHiCSagent::learningComputation()</a>.
<p>
<div class="fragment"><pre>00046 {
00047 <span class="keywordflow">return</span> (<a class="code" href="a04558.html#a11">uint32</a>) time (NULL);
00048 }
</pre></div> </td>
</tr>
</table>
<a class="anchor" name="NLMISC_1_1CTimee3" doxytag="NLMISC::CTime::ticksToSecond" ></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"> double NLMISC::CTime::ticksToSecond </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="a05378.html#a243">TTicks</a> </td>
<td class="mdname1" valign="top" nowrap> <em>ticks</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
convert a ticks count into second. If the performance time is not supported on this hardware, it returns 0.0.
<p>
Definition at line <a class="el" href="a06552.html#l00143">143</a> of file <a class="el" href="a06552.html">time_nl.cpp</a>.
<p>
References <a class="el" href="a06552.html#l00055">getLocalTime()</a>, <a class="el" href="a06552.html#l00105">getPerformanceTime()</a>, <a class="el" href="a05981.html#l00101">sint64</a>, <a class="el" href="a06553.html#l00048">NLMISC::TTicks</a>, and <a class="el" href="a06553.html#l00047">NLMISC::TTime</a>.
<p>
Referenced by <a class="el" href="a06348.html#l00300">NL3D::CScene::render()</a>.
<p>
<div class="fragment"><pre>00144 {
00145 <span class="preprocessor">#ifdef NL_OS_WINDOWS</span>
00146 <span class="preprocessor"></span> LARGE_INTEGER ret;
00147 <span class="keywordflow">if</span> (QueryPerformanceFrequency(&ret))
00148 {
00149 <span class="keywordflow">return</span> (<span class="keywordtype">double</span>)(<a class="code" href="a04558.html#a12">sint64</a>)ticks/(<span class="keywordtype">double</span>)ret.QuadPart;
00150 }
00151 <span class="keywordflow">else</span>
00152 <span class="preprocessor">#endif // NL_OS_WINDOWS</span>
00153 <span class="preprocessor"></span> {
00154 <span class="keyword">static</span> <span class="keywordtype">bool</span> benchFrequency = <span class="keyword">true</span>;
00155 <span class="keyword">static</span> <a class="code" href="a04558.html#a12">sint64</a> freq = 0;
00156 <span class="keywordflow">if</span> (benchFrequency)
00157 {
00158 <span class="comment">// try to have an estimation of the cpu frequency</span>
00159
00160 <a class="code" href="a05378.html#a243">TTicks</a> tickBefore = <a class="code" href="a02142.html#NLMISC_1_1CTimee1">getPerformanceTime</a> ();
00161 <a class="code" href="a05378.html#a243">TTicks</a> tickAfter = tickBefore;
00162 <a class="code" href="a05378.html#a242">TTime</a> timeBefore = <a class="code" href="a02142.html#NLMISC_1_1CTimee0">getLocalTime</a> ();
00163 <a class="code" href="a05378.html#a242">TTime</a> timeAfter = timeBefore;
00164 <span class="keywordflow">while</span> (<span class="keyword">true</span>)
00165 {
00166 <span class="keywordflow">if</span> (timeAfter - timeBefore > 1000)
00167 <span class="keywordflow">break</span>;
00168 timeAfter = <a class="code" href="a02142.html#NLMISC_1_1CTimee0">getLocalTime</a> ();
00169 tickAfter = <a class="code" href="a02142.html#NLMISC_1_1CTimee1">getPerformanceTime</a> ();
00170 }
00171
00172 <a class="code" href="a05378.html#a242">TTime</a> timeDelta = timeAfter - timeBefore;
00173 <a class="code" href="a05378.html#a243">TTicks</a> tickDelta = tickAfter - tickBefore;
00174
00175 freq = 1000 * tickDelta / timeDelta;
00176 benchFrequency = <span class="keyword">false</span>;
00177 }
00178
00179 <span class="keywordflow">return</span> (<span class="keywordtype">double</span>)(<a class="code" href="a04558.html#a12">sint64</a>)ticks/(<span class="keywordtype">double</span>)freq;
00180 }
00181 }
</pre></div> </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a06553.html">time_nl.h</a><li><a class="el" href="a06552.html">time_nl.cpp</a></ul>
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