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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>time_nl.cpp</h1><a href="time__nl_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font> +00008 <font class="comment"> *</font> +00009 <font class="comment"> * This file is part of NEVRAX NEL.</font> +00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font> +00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font> +00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font> +00013 <font class="comment"> * any later version.</font> +00014 <font class="comment"></font> +00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font> +00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font> +00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font> +00018 <font class="comment"> * General Public License for more details.</font> +00019 <font class="comment"></font> +00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font> +00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font> +00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font> +00023 <font class="comment"> * MA 02111-1307, USA.</font> +00024 <font class="comment"> */</font> +00025 +00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font> +00027 +00028 <font class="preprocessor">#include <time.h></font> +00029 +00030 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font> +00031 <font class="preprocessor"></font><font class="preprocessor"># include <windows.h></font> +00032 <font class="preprocessor">#elif defined (NL_OS_UNIX)</font> +00033 <font class="preprocessor"></font><font class="preprocessor"># include <sys/time.h></font> +00034 <font class="preprocessor"># include <<a class="code" href="unistd_8h.html">unistd.h</a>></font> +00035 <font class="preprocessor">#endif</font> +00036 <font class="preprocessor"></font> +00037 <font class="preprocessor">#include "<a class="code" href="time__nl_8h.html">nel/misc/time_nl.h</a>"</font> +00038 +00039 <font class="keyword">namespace </font>NLMISC +00040 { +00041 +00042 <font class="comment">/*</font> +00043 <font class="comment"> *</font> +00044 <font class="comment"> */</font> +<a name="l00045"></a><a class="code" href="classNLMISC_1_1CTime.html#d0">00045</a> uint32 CTime::getSecondsSince1970 () +00046 { +00047 <font class="keywordflow">return</font> (uint32) time (NULL); +00048 } +00049 +00050 +00051 +00052 <font class="comment">/*</font> +00053 <font class="comment"> *</font> +00054 <font class="comment"> */</font> +<a name="l00055"></a><a class="code" href="classNLMISC_1_1CTime.html#d1">00055</a> <a class="code" href="namespaceNLMISC.html#a183">TTime</a> CTime::getLocalTime () +00056 { +00057 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font> +00058 <font class="preprocessor"></font> +00059 <font class="keyword">static</font> <font class="keywordtype">bool</font> byperfcounter; +00060 <font class="keyword">static</font> <font class="keywordtype">bool</font> initdone = <font class="keyword">false</font>; +00061 +00062 <font class="comment">// Initialization</font> +00063 <font class="keywordflow">if</font> ( ! initdone ) +00064 { +00065 byperfcounter = (<a class="code" href="classNLMISC_1_1CTime.html#d2">getPerformanceTime</a>() != 0); +00066 initdone = <font class="keyword">true</font>; +00067 } +00068 +00069 <font class="comment">/* Retrieve time is ms</font> +00070 <font class="comment"> * Why do we prefer getPerformanceTime() to timeGetTime() ? Because on one dual-processor Win2k</font> +00071 <font class="comment"> * PC, we have noticed that timeGetTime() slows down when the client is running !!!</font> +00072 <font class="comment"> */</font> +00073 +00074 +00075 <font class="comment">/* Now we have noticed that on all WinNT4 PC the getPerformanceTime can give us value that</font> +00076 <font class="comment"> * are less than previous</font> +00077 <font class="comment"> */</font> +00078 +00079 <font class="comment">//if ( byperfcounter )</font> +00080 <font class="comment">//{</font> +00081 <font class="comment">// return (TTime)(ticksToSecond(getPerformanceTime()) * 1000.0f);</font> +00082 <font class="comment">//}</font> +00083 <font class="comment">//else</font> +00084 <font class="comment">//{</font> +00085 <font class="keywordflow">return</font> timeGetTime(); +00086 <font class="comment">//}</font> +00087 +00088 <font class="preprocessor">#elif defined (NL_OS_UNIX)</font> +00089 <font class="preprocessor"></font> +00090 <font class="keyword">struct </font>timeval tv; +00091 +00092 <font class="keywordflow">if</font> ( gettimeofday( &tv, NULL) == -1 ) +00093 { +00094 <a class="code" href="debug_8h.html#a3">nlerror</a> (<font class="stringliteral">"Cannot get time of day."</font>); +00095 } +00096 <font class="keywordflow">return</font> (TTime)tv.tv_sec * (TTime)1000 + (TTime)tv.tv_usec / (TTime)1000; +00097 +00098 <font class="preprocessor">#endif</font> +00099 <font class="preprocessor"></font>} +00100 +00101 +00102 <font class="comment">/*</font> +00103 <font class="comment"> *</font> +00104 <font class="comment"> */</font> +<a name="l00105"></a><a class="code" href="classNLMISC_1_1CTime.html#d2">00105</a> <a class="code" href="namespaceNLMISC.html#a184">TTicks</a> CTime::getPerformanceTime () +00106 { +00107 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font> +00108 <font class="preprocessor"></font> LARGE_INTEGER ret; +00109 <font class="keywordflow">if</font> (QueryPerformanceCounter (&ret)) +00110 <font class="keywordflow">return</font> ret.QuadPart; +00111 <font class="keywordflow">else</font> +00112 <font class="keywordflow">return</font> 0; +00113 <font class="preprocessor">#else // NL_OS_WINDOWS</font> +00114 <font class="preprocessor"></font> +00115 <font class="preprocessor">#ifdef HAVE_X86</font> +00116 <font class="preprocessor"></font> <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> <font class="keywordtype">long</font> <font class="keywordtype">int</font> <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>; +00117 __asm__ <font class="keyword">volatile</font> (<font class="stringliteral">".byte 0x0f, 0x31"</font> : <font class="stringliteral">"=A"</font> (x)); +00118 <font class="keywordflow">return</font> <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>; +00119 <font class="preprocessor">#else HAVE_X86</font> +00120 <font class="preprocessor"></font> <font class="keyword">static</font> <font class="keywordtype">bool</font> firstWarn = <font class="keyword">true</font>; +00121 <font class="keywordflow">if</font> (firstWarn) +00122 { +00123 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"TTicks CTime::getPerformanceTime () is not implemented for your processor, returning 0"</font>); +00124 firstWarn = <font class="keyword">false</font>; +00125 } +00126 <font class="keywordflow">return</font> 0; +00127 <font class="preprocessor">#endif // HAVE_X86</font> +00128 <font class="preprocessor"></font> +00129 <font class="preprocessor">#endif // NL_OS_WINDOWS</font> +00130 <font class="preprocessor"></font>} +00131 <font class="comment">/*</font> +00132 <font class="comment">#define GETTICKS(t) asm volatile ("push %%esi\n\t" "mov %0, %%esi" : : "r" (t)); \</font> +00133 <font class="comment"> asm volatile ("push %eax\n\t" "push %edx"); \</font> +00134 <font class="comment"> asm volatile ("rdtsc"); \</font> +00135 <font class="comment"> asm volatile ("movl %eax, (%esi)\n\t" "movl %edx, 4(%esi)"); \</font> +00136 <font class="comment"> asm volatile ("pop %edx\n\t" "pop %eax\n\t" "pop %esi"); </font> +00137 <font class="comment">*/</font> +00138 +00139 +00140 <font class="comment">/*</font> +00141 <font class="comment"> *</font> +00142 <font class="comment"> */</font> +<a name="l00143"></a><a class="code" href="classNLMISC_1_1CTime.html#d3">00143</a> <font class="keywordtype">double</font> CTime::ticksToSecond (<a class="code" href="namespaceNLMISC.html#a184">TTicks</a> ticks) +00144 { +00145 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font> +00146 <font class="preprocessor"></font> LARGE_INTEGER ret; +00147 <font class="keywordflow">if</font> (QueryPerformanceFrequency(&ret)) +00148 { +00149 <font class="keywordflow">return</font> (double)(sint64)ticks/(double)ret.QuadPart; +00150 } +00151 <font class="keywordflow">else</font> +00152 <font class="preprocessor">#endif // NL_OS_WINDOWS</font> +00153 <font class="preprocessor"></font> { +00154 <font class="keyword">static</font> <font class="keywordtype">bool</font> benchFrequency = <font class="keyword">true</font>; +00155 <font class="keyword">static</font> sint64 freq = 0; +00156 <font class="keywordflow">if</font> (benchFrequency) +00157 { +00158 <font class="comment">// try to have an estimation of the cpu frequency</font> +00159 +00160 <a class="code" href="namespaceNLMISC.html#a184">TTicks</a> tickBefore = <a class="code" href="classNLMISC_1_1CTime.html#d2">getPerformanceTime</a> (); +00161 <a class="code" href="namespaceNLMISC.html#a184">TTicks</a> tickAfter = tickBefore; +00162 <a class="code" href="namespaceNLMISC.html#a183">TTime</a> timeBefore = <a class="code" href="classNLMISC_1_1CTime.html#d1">getLocalTime</a> (); +00163 <a class="code" href="namespaceNLMISC.html#a183">TTime</a> timeAfter = timeBefore; +00164 <font class="keywordflow">while</font> (true) +00165 { +00166 <font class="keywordflow">if</font> (timeAfter - timeBefore > 1000) +00167 <font class="keywordflow">break</font>; +00168 timeAfter = <a class="code" href="classNLMISC_1_1CTime.html#d1">getLocalTime</a> (); +00169 tickAfter = <a class="code" href="classNLMISC_1_1CTime.html#d2">getPerformanceTime</a> (); +00170 } +00171 +00172 <a class="code" href="namespaceNLMISC.html#a183">TTime</a> timeDelta = timeAfter - timeBefore; +00173 <a class="code" href="namespaceNLMISC.html#a184">TTicks</a> tickDelta = tickAfter - tickBefore; +00174 +00175 freq = 1000 * tickDelta / timeDelta; +00176 benchFrequency = <font class="keyword">false</font>; +00177 } +00178 +00179 <font class="keywordflow">return</font> (double)(sint64)ticks/(double)freq; +00180 } +00181 } +00182 +00183 +00184 } <font class="comment">// NLMISC</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |