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<h1>hrtimer.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef CRYPTOPP_HRTIMER_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_HRTIMER_H</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include "config.h"</span>
<a name="l00005"></a>00005 <span class="preprocessor">#ifndef HIGHRES_TIMER_AVAILABLE</span>
<a name="l00006"></a>00006 <span class="preprocessor"></span><span class="preprocessor">#include <time.h></span>
<a name="l00007"></a>00007 <span class="preprocessor">#endif</span>
<a name="l00008"></a>00008 <span class="preprocessor"></span>
<a name="l00009"></a>00009 NAMESPACE_BEGIN(CryptoPP)
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="preprocessor">#ifdef HIGHRES_TIMER_AVAILABLE</span>
<a name="l00012"></a>00012 <span class="preprocessor"></span> <span class="keyword">typedef</span> word64 TimerWord;
<a name="l00013"></a>00013 <span class="preprocessor">#else</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span> <span class="keyword">typedef</span> clock_t TimerWord;
<a name="l00015"></a>00015 <span class="preprocessor">#endif</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment">//! _</span>
<a name="l00018"></a><a class="code" href="class_timer_base.html">00018</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL CRYPTOPP_NO_VTABLE <a class="code" href="class_timer_base.html" title="_">TimerBase</a>
<a name="l00019"></a>00019 {
<a name="l00020"></a>00020 <span class="keyword">public</span>:
<a name="l00021"></a>00021 <span class="keyword">enum</span> Unit {SECONDS = 0, MILLISECONDS, MICROSECONDS, NANOSECONDS};
<a name="l00022"></a>00022 <a class="code" href="class_timer_base.html" title="_">TimerBase</a>(Unit unit, <span class="keywordtype">bool</span> stuckAtZero) : m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(<span class="keyword">false</span>) {}
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="keyword">virtual</span> TimerWord GetCurrentTimerValue() =0; <span class="comment">// GetCurrentTime is a macro in MSVC 6.0</span>
<a name="l00025"></a>00025 <span class="keyword">virtual</span> TimerWord TicksPerSecond() =0; <span class="comment">// this is not the resolution, just a conversion factor into seconds</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keywordtype">void</span> StartTimer();
<a name="l00028"></a>00028 <span class="keywordtype">double</span> ElapsedTimeAsDouble();
<a name="l00029"></a>00029 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ElapsedTime();
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="keyword">private</span>:
<a name="l00032"></a>00032 <span class="keywordtype">double</span> ConvertTo(TimerWord t, Unit unit);
<a name="l00033"></a>00033
<a name="l00034"></a>00034 Unit m_timerUnit; <span class="comment">// HPUX workaround: m_unit is a system macro on HPUX</span>
<a name="l00035"></a>00035 <span class="keywordtype">bool</span> m_stuckAtZero, m_started;
<a name="l00036"></a>00036 TimerWord m_start, m_last;
<a name="l00037"></a>00037 };
<a name="l00038"></a>00038 <span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment">//! measure CPU time spent executing instructions of this thread (if supported by OS)</span>
<a name="l00040"></a>00040 <span class="comment"></span><span class="comment">/*! /note This only works correctly on Windows NT or later. On Unix it reports process time, and others wall clock time.</span>
<a name="l00041"></a>00041 <span class="comment">*/</span>
<a name="l00042"></a><a class="code" href="class_thread_user_timer.html">00042</a> <span class="keyword">class </span><a class="code" href="class_thread_user_timer.html" title="measure CPU time spent executing instructions of this thread (if supported by OS)...">ThreadUserTimer</a> : <span class="keyword">public</span> <a class="code" href="class_timer_base.html" title="_">TimerBase</a>
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keyword">public</span>:
<a name="l00045"></a>00045 <a class="code" href="class_thread_user_timer.html" title="measure CPU time spent executing instructions of this thread (if supported by OS)...">ThreadUserTimer</a>(Unit unit = TimerBase::SECONDS, <span class="keywordtype">bool</span> stuckAtZero = <span class="keyword">false</span>) : <a class="code" href="class_timer_base.html" title="_">TimerBase</a>(unit, stuckAtZero) {}
<a name="l00046"></a>00046 TimerWord GetCurrentTimerValue();
<a name="l00047"></a>00047 TimerWord TicksPerSecond();
<a name="l00048"></a>00048 };
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment">//! high resolution timer</span>
<a name="l00051"></a><a class="code" href="class_timer.html">00051</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL <a class="code" href="class_timer.html" title="high resolution timer">Timer</a> : <span class="keyword">public</span> <a class="code" href="class_timer_base.html" title="_">TimerBase</a>
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 <span class="keyword">public</span>:
<a name="l00054"></a>00054 <a class="code" href="class_timer.html" title="high resolution timer">Timer</a>(Unit unit = TimerBase::SECONDS, <span class="keywordtype">bool</span> stuckAtZero = <span class="keyword">false</span>) : <a class="code" href="class_timer_base.html" title="_">TimerBase</a>(unit, stuckAtZero) {}
<a name="l00055"></a>00055 TimerWord GetCurrentTimerValue();
<a name="l00056"></a>00056 TimerWord TicksPerSecond();
<a name="l00057"></a>00057 };
<a name="l00058"></a>00058
<a name="l00059"></a>00059 NAMESPACE_END
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="preprocessor">#endif</span>
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