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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: hrtimer.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>hrtimer.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// hrtimer.cpp - written and placed in the public domain by Wei Dai</span><a name="l00002"></a>00002 <a name="l00003"></a>00003 <span class="preprocessor">#include "pch.h"</span><a name="l00004"></a>00004 <span class="preprocessor">#include "hrtimer.h"</span><a name="l00005"></a>00005 <span class="preprocessor">#include "misc.h"</span><a name="l00006"></a>00006 <span class="preprocessor">#include <stddef.h></span> <span class="comment">// for NULL</span><a name="l00007"></a>00007 <span class="preprocessor">#include <time.h></span><a name="l00008"></a>00008 <a name="l00009"></a>00009 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span><a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span><a name="l00011"></a>00011 <span class="preprocessor">#elif defined(CRYPTOPP_UNIX_AVAILABLE)</span><a name="l00012"></a>00012 <span class="preprocessor"></span><span class="preprocessor">#include <sys/time.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include <sys/times.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include <unistd.h></span><a name="l00015"></a>00015 <span class="preprocessor">#endif</span><a name="l00016"></a>00016 <span class="preprocessor"></span><a name="l00017"></a>00017 <span class="preprocessor">#include <assert.h></span><a name="l00018"></a>00018 <a name="l00019"></a>00019 NAMESPACE_BEGIN(CryptoPP)<a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="preprocessor">#ifndef CRYPTOPP_IMPORTS</span><a name="l00022"></a>00022 <span class="preprocessor"></span><a name="l00023"></a>00023 <span class="keywordtype">double</span> TimerBase::ConvertTo(TimerWord t, Unit unit)<a name="l00024"></a>00024 {<a name="l00025"></a>00025 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> unitsPerSecondTable[] = {1, 1000, 1000*1000, 1000*1000*1000};<a name="l00026"></a>00026 <a name="l00027"></a>00027 assert(unit < <span class="keyword">sizeof</span>(unitsPerSecondTable) / <span class="keyword">sizeof</span>(unitsPerSecondTable[0]));<a name="l00028"></a>00028 <span class="keywordflow">return</span> (<span class="keywordtype">double</span>)CRYPTOPP_VC6_INT64 t * unitsPerSecondTable[unit] / CRYPTOPP_VC6_INT64 TicksPerSecond();<a name="l00029"></a>00029 }<a name="l00030"></a>00030 <a name="l00031"></a><a class="code" href="class_timer_base.html#50804b61c4254f7289c6c67515d5d46d">00031</a> <span class="keywordtype">void</span> <a class="code" href="class_timer_base.html#50804b61c4254f7289c6c67515d5d46d">TimerBase::StartTimer</a>()<a name="l00032"></a>00032 {<a name="l00033"></a>00033 m_last = m_start = GetCurrentTimerValue();<a name="l00034"></a>00034 m_started = <span class="keyword">true</span>;<a name="l00035"></a>00035 }<a name="l00036"></a>00036 <a name="l00037"></a><a class="code" href="class_timer_base.html#3262a9d0815f1899701ee83c3ef8cf43">00037</a> <span class="keywordtype">double</span> <a class="code" href="class_timer_base.html#3262a9d0815f1899701ee83c3ef8cf43">TimerBase::ElapsedTimeAsDouble</a>()<a name="l00038"></a>00038 {<a name="l00039"></a>00039 <span class="keywordflow">if</span> (m_stuckAtZero)<a name="l00040"></a>00040 <span class="keywordflow">return</span> 0;<a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keywordflow">if</span> (m_started)<a name="l00043"></a>00043 {<a name="l00044"></a>00044 TimerWord now = GetCurrentTimerValue();<a name="l00045"></a>00045 <span class="keywordflow">if</span> (m_last < now) <span class="comment">// protect against OS bugs where time goes backwards</span><a name="l00046"></a>00046 m_last = now;<a name="l00047"></a>00047 <span class="keywordflow">return</span> ConvertTo(m_last - m_start, m_timerUnit);<a name="l00048"></a>00048 }<a name="l00049"></a>00049 <a name="l00050"></a>00050 <a class="code" href="class_timer_base.html#50804b61c4254f7289c6c67515d5d46d">StartTimer</a>();<a name="l00051"></a>00051 <span class="keywordflow">return</span> 0;<a name="l00052"></a>00052 }<a name="l00053"></a>00053 <a name="l00054"></a><a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">00054</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">TimerBase::ElapsedTime</a>()<a name="l00055"></a>00055 {<a name="l00056"></a>00056 <span class="keywordtype">double</span> elapsed = <a class="code" href="class_timer_base.html#3262a9d0815f1899701ee83c3ef8cf43">ElapsedTimeAsDouble</a>();<a name="l00057"></a>00057 assert(elapsed <= ULONG_MAX);<a name="l00058"></a>00058 <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)elapsed;<a name="l00059"></a>00059 }<a name="l00060"></a>00060 <a name="l00061"></a><a class="code" href="class_timer.html#2614960e78eb57d97ad284dcb6fd8f02">00061</a> TimerWord <a class="code" href="class_timer.html#2614960e78eb57d97ad284dcb6fd8f02">Timer::GetCurrentTimerValue</a>()<a name="l00062"></a>00062 {<a name="l00063"></a>00063 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span><a name="l00064"></a>00064 <span class="preprocessor"></span> LARGE_INTEGER now;<a name="l00065"></a>00065 <span class="keywordflow">if</span> (!QueryPerformanceCounter(&now))<a name="l00066"></a>00066 <span class="keywordflow">throw</span> <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a27d9ee7704100a88e4ae4adcc4072015" title="some error not belong to any of the above categories">Exception::OTHER_ERROR</a>, <span class="stringliteral">"Timer: QueryPerformanceCounter failed with error "</span> + IntToString(GetLastError()));<a name="l00067"></a>00067 <span class="keywordflow">return</span> now.QuadPart;<a name="l00068"></a>00068 <span class="preprocessor">#elif defined(CRYPTOPP_UNIX_AVAILABLE)</span><a name="l00069"></a>00069 <span class="preprocessor"></span> timeval now;<a name="l00070"></a>00070 gettimeofday(&now, NULL);<a name="l00071"></a>00071 <span class="keywordflow">return</span> (TimerWord)now.tv_sec * 1000000 + now.tv_usec;<a name="l00072"></a>00072 <span class="preprocessor">#else</span><a name="l00073"></a>00073 <span class="preprocessor"></span> clock_t now;<a name="l00074"></a>00074 <span class="keywordflow">return</span> clock();<a name="l00075"></a>00075 <span class="preprocessor">#endif</span><a name="l00076"></a>00076 <span class="preprocessor"></span>}<a name="l00077"></a>00077 <a name="l00078"></a><a class="code" href="class_timer.html#654613b34c00c6ac5853f0886ccf6524">00078</a> TimerWord <a class="code" href="class_timer.html#654613b34c00c6ac5853f0886ccf6524">Timer::TicksPerSecond</a>()<a name="l00079"></a>00079 {<a name="l00080"></a>00080 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span><a name="l00081"></a>00081 <span class="preprocessor"></span> <span class="keyword">static</span> LARGE_INTEGER freq = {0};<a name="l00082"></a>00082 <span class="keywordflow">if</span> (freq.QuadPart == 0)<a name="l00083"></a>00083 {<a name="l00084"></a>00084 <span class="keywordflow">if</span> (!QueryPerformanceFrequency(&freq))<a name="l00085"></a>00085 <span class="keywordflow">throw</span> <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a27d9ee7704100a88e4ae4adcc4072015" title="some error not belong to any of the above categories">Exception::OTHER_ERROR</a>, <span class="stringliteral">"Timer: QueryPerformanceFrequency failed with error "</span> + IntToString(GetLastError()));<a name="l00086"></a>00086 }<a name="l00087"></a>00087 <span class="keywordflow">return</span> freq.QuadPart;<a name="l00088"></a>00088 <span class="preprocessor">#elif defined(CRYPTOPP_UNIX_AVAILABLE)</span><a name="l00089"></a>00089 <span class="preprocessor"></span> <span class="keywordflow">return</span> 1000000;<a name="l00090"></a>00090 <span class="preprocessor">#else</span><a name="l00091"></a>00091 <span class="preprocessor"></span> <span class="keywordflow">return</span> CLOCKS_PER_SEC;<a name="l00092"></a>00092 <span class="preprocessor">#endif</span><a name="l00093"></a>00093 <span class="preprocessor"></span>}<a name="l00094"></a>00094 <a name="l00095"></a>00095 <span class="preprocessor">#endif // #ifndef CRYPTOPP_IMPORTS</span><a name="l00096"></a>00096 <span class="preprocessor"></span><a name="l00097"></a><a class="code" href="class_thread_user_timer.html#91697dfcc4a2a2ed88ac18a3196dff71">00097</a> TimerWord <a class="code" href="class_thread_user_timer.html#91697dfcc4a2a2ed88ac18a3196dff71">ThreadUserTimer::GetCurrentTimerValue</a>()<a name="l00098"></a>00098 {<a name="l00099"></a>00099 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span><a name="l00100"></a>00100 <span class="preprocessor"></span> <span class="keyword">static</span> <span class="keywordtype">bool</span> getCurrentThreadImplemented = <span class="keyword">true</span>;<a name="l00101"></a>00101 <span class="keywordflow">if</span> (getCurrentThreadImplemented)<a name="l00102"></a>00102 {<a name="l00103"></a>00103 FILETIME now, ignored;<a name="l00104"></a>00104 <span class="keywordflow">if</span> (!GetThreadTimes(GetCurrentThread(), &ignored, &ignored, &ignored, &now))<a name="l00105"></a>00105 {<a name="l00106"></a>00106 DWORD lastError = GetLastError();<a name="l00107"></a>00107 <span class="keywordflow">if</span> (lastError == ERROR_CALL_NOT_IMPLEMENTED)<a name="l00108"></a>00108 {<a name="l00109"></a>00109 getCurrentThreadImplemented = <span class="keyword">false</span>;<a name="l00110"></a>00110 <span class="keywordflow">goto</span> GetCurrentThreadNotImplemented;<a name="l00111"></a>00111 }<a name="l00112"></a>00112 <span class="keywordflow">throw</span> <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a27d9ee7704100a88e4ae4adcc4072015" title="some error not belong to any of the above categories">Exception::OTHER_ERROR</a>, <span class="stringliteral">"ThreadUserTimer: GetThreadTimes failed with error "</span> + IntToString(lastError));<a name="l00113"></a>00113 }<a name="l00114"></a>00114 <span class="keywordflow">return</span> now.dwLowDateTime + ((TimerWord)now.dwHighDateTime << 32);<a name="l00115"></a>00115 }<a name="l00116"></a>00116 GetCurrentThreadNotImplemented:<a name="l00117"></a>00117 <span class="keywordflow">return</span> (TimerWord)clock() * (10*1000*1000 / CLOCKS_PER_SEC);<a name="l00118"></a>00118 <span class="preprocessor">#elif defined(CRYPTOPP_UNIX_AVAILABLE)</span><a name="l00119"></a>00119 <span class="preprocessor"></span> tms now;<a name="l00120"></a>00120 times(&now);<a name="l00121"></a>00121 <span class="keywordflow">return</span> now.tms_utime;<a name="l00122"></a>00122 <span class="preprocessor">#else</span><a name="l00123"></a>00123 <span class="preprocessor"></span> <span class="keywordflow">return</span> clock();<a name="l00124"></a>00124 <span class="preprocessor">#endif</span><a name="l00125"></a>00125 <span class="preprocessor"></span>}<a name="l00126"></a>00126 <a name="l00127"></a><a class="code" href="class_thread_user_timer.html#e7fd32f847909e268eca39a91d07aab0">00127</a> TimerWord <a class="code" href="class_thread_user_timer.html#e7fd32f847909e268eca39a91d07aab0">ThreadUserTimer::TicksPerSecond</a>()<a name="l00128"></a>00128 {<a name="l00129"></a>00129 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span><a name="l00130"></a>00130 <span class="preprocessor"></span> <span class="keywordflow">return</span> 10*1000*1000;<a name="l00131"></a>00131 <span class="preprocessor">#elif defined(CRYPTOPP_UNIX_AVAILABLE)</span><a name="l00132"></a>00132 <span class="preprocessor"></span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">long</span> ticksPerSecond = sysconf(_SC_CLK_TCK);<a name="l00133"></a>00133 <span class="keywordflow">return</span> ticksPerSecond;<a name="l00134"></a>00134 <span class="preprocessor">#else</span><a name="l00135"></a>00135 <span class="preprocessor"></span> <span class="keywordflow">return</span> CLOCKS_PER_SEC;<a name="l00136"></a>00136 <span class="preprocessor">#endif</span><a name="l00137"></a>00137 <span class="preprocessor"></span>}<a name="l00138"></a>00138 <a name="l00139"></a>00139 NAMESPACE_END</pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:21 2007 for Crypto++ by <a href="http://www.doxygen.org/index.html"><img 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