hrtimer_8cpp-source.html
来自「Crypto++是一个非常强大的密码学库,主要是功能全」· HTML 代码 · 共 89 行
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Crypto++: hrtimer.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.2 --><div class="qindex"><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></div><h1>hrtimer.cpp</h1><div class="fragment"><pre>00001 <span class="comment">// hrtimer.cpp - written and placed in the public domain by Wei Dai</span>00002 00003 <span class="preprocessor">#include "pch.h"</span>00004 <span class="preprocessor">#include "hrtimer.h"</span>00005 <span class="preprocessor">#include <stddef.h></span> <span class="comment">// for NULL</span>00006 00007 <span class="preprocessor">#ifdef HIGHRES_TIMER_AVAILABLE</span>00008 <span class="preprocessor"></span>00009 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span>00010 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span>00011 <span class="preprocessor">#elif defined(__unix__)</span>00012 <span class="preprocessor"></span><span class="preprocessor">#include <sys/time.h></span>00013 <span class="preprocessor">#elif defined(macintosh)</span>00014 <span class="preprocessor"></span><span class="preprocessor">#include <Timer.h></span>00015 <span class="preprocessor">#endif</span>00016 <span class="preprocessor"></span>00017 <span class="preprocessor">#include <assert.h></span>00018 00019 NAMESPACE_BEGIN(CryptoPP)00020 00021 word64 Timer::GetCurrentTimerValue()00022 {00023 <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE)</span>00024 <span class="preprocessor"></span> FILETIME now;00025 GetSystemTimeAsFileTime(&now);00026 <span class="keywordflow">return</span> now.dwLowDateTime + ((word64)now.dwHighDateTime << 32);00027 <span class="preprocessor">#elif defined(__unix__)</span>00028 <span class="preprocessor"></span> timeval now;00029 gettimeofday(&now, NULL);00030 <span class="keywordflow">return</span> (word64)now.tv_sec * 1000000 + now.tv_usec;00031 <span class="preprocessor">#elif defined(macintosh)</span>00032 <span class="preprocessor"></span> UnsignedWide now;00033 Microseconds(&now);00034 <span class="keywordflow">return</span> now.lo + ((word64)now.hi << 32);00035 <span class="preprocessor">#endif</span>00036 <span class="preprocessor"></span>}00037 00038 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> Timer::ConvertTo(word64 t, Unit unit)00039 {00040 <span class="keywordflow">switch</span> (unit)00041 {00042 <span class="keywordflow">case</span> SECONDS:00043 <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)(t / (TicksPerMillisecond() * 1000));00044 <span class="keywordflow">case</span> MILLISECONDS:00045 <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)(t / TicksPerMillisecond());00046 <span class="keywordflow">case</span> MICROSECONDS:00047 assert(TicksPerMillisecond() % 1000 == 0);00048 <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)(t / (TicksPerMillisecond() / 1000));00049 }00050 assert(<span class="keyword">false</span>);00051 <span class="keywordflow">return</span> 0;00052 }00053 00054 <span class="keywordtype">void</span> Timer::StartTimer()00055 {00056 m_start = GetCurrentTimerValue();00057 m_started = <span class="keyword">true</span>;00058 }00059 00060 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> Timer::ElapsedTime()00061 {00062 <span class="keywordflow">if</span> (m_stuckAtZero)00063 <span class="keywordflow">return</span> 0;00064 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_started)00065 <span class="keywordflow">return</span> ConvertTo(GetCurrentTimerValue() - m_start, m_timerUnit);00066 <span class="keywordflow">else</span>00067 {00068 StartTimer();00069 <span class="keywordflow">return</span> 0;00070 }00071 }00072 00073 NAMESPACE_END00074 00075 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:34:16 2003 for Crypto++ by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 > </a>1.3.2 </small></address></body></html>⌨️ 快捷键说明
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