1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
<TITLE>nevrax.org : docs</TITLE>
<LINK REL=stylesheet TYPE="text/css" HREF="/inc/css/nevrax.css">
<link href="doxygen.css" rel="stylesheet" type="text/css">
</HEAD>
<BODY MARGINHEIGHT="0" MARGINWIDTH="0">
<!-- uplinks -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF='/'><b>Home</B></FONT></A> </TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF=><b>nevrax.com</B></FONT></A> </TD>
</TR>
</TABLE>
<!-- banner Nevrax -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 WIDTH=100%>
<TR><TD BGCOLOR="#000000" BACKGROUND="/inc/img/black_banner.jpg"><A HREF=""><IMG SRC="/inc/img/nevrax.gif" WIDTH="170" HEIGHT="45" BORDER=0 ALT="Nevrax" ></A></TD></TR>
</TABLE>
<!-- main table -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 height=100%>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="10" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd VALIGN=TOP ALIGN=middle><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!------ Begin Box ------>
<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR=black><TR><TD><TABLE border=0 cellspacing=2 cellpadding=0 width=120><tr><TD ALIGN=middle bgcolor=black>
<FONT COLOR=white FACE="sans-serif"><B>Nevrax.org</B></FONT></TD></TR><tr><td colspan=2 bgcolor=#FFFFFF>
<TABLE cellspacing=0 cellpadding=1 border=0>
<tr><td ALIGN=middle><a class='linkbox' href="/news/" TITLE="Rubrique news"><img width=13 height=15 hspace=5 border=0 src=/inc/img/picto-news.gif ALT=#></A></td><td><a class='linkbox' href="/news/" TITLE="News">News</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/mail/" TITLE="Rubrique mail"><img width=15 height=11 hspace=5 border=0 src=/inc/img/picto-mail.gif ALT=#></A></td><td><a class='linkbox' href="/mail/" TITLE="Mailing list archive">Mailing-list</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/docs/" TITLE="Rubrique docs"><img width=14 height=16 hspace=5 border=0 src=/inc/img/picto-docs.gif ALT=#></A></td><td><a class='linkbox' href="/docs/" TITLE="Documentation">Documentation</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/cvs/" TITLE="Rubrique cvs"><img width=13 height=17 hspace=5 border=0 src=/inc/img/picto-cvs.gif ALT=#></A></td><td><a class='linkbox' href="/cvs/" TITLE="CVS Web">CVS</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/bugs/" TITLE="Rubrique bugs"><img width=20 height=16 hspace=5 border=0 src=/inc/img/picto-bugs.gif ALT=#></A></td><td><a class='linkbox' href="/bugs/" TITLE="Bugtracking">Bugs</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/GPL.php3" TITLE="Rubrique license"><img width=18 height=12 hspace=5 border=0 src=/inc/img/picto-gpl.gif ALT=#></A></td><td><a class='linkbox' href="/GPL.php3" TITLE="License">License</a></td></tr>
</TABLE>
</TD></TR></TABLE></TD></TR></TABLE>
<!------ End Box ------>
</TD>
<TD WIDTH=15><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD ALIGN=left valign=top><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!-- title -->
<TABLE background="/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td>
<A HREF="/docs/"><img src="/inc/img/t_docs.gif" ALT="Docs" HEIGHT=20 BORDER=0></A>
</td><td><IMG SRC="/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT="">
</td></tr></table>
<!-- block -->
<TABLE bgcolor="#dddddd" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td width=1% valign=middle><img width=6 height=14 hspace=2 vspace=2 src="/inc/img/reddots.gif"></TD>
<TD><B>Documentation</B></TD>
<TD ALIGN=RIGHT> </td>
</tr></table>
<!-- Generated by Doxygen 1.2.14 -->
<center>
<a class="qindex" href="index.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">Compound List</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">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> <a class="qindex" href="pages.html">Related Pages</a> <a class="qindexRef" doxygen="_cgi:/cgi-bin/nel-search.cgi" href="/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=/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD>
</TR>
</TABLE>
</BODY>
</HTML>
|
