Sophie

Sophie

distrib > Fedora > 13 > i386 > media > os > by-pkgid > 07dfcfe50d66c9a48a3c5e6c1693f12a > files > 2421

cryptopp-doc-5.6.1-0.1.svn479.fc13.i686.rpm

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>Crypto++: wait.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.1 -->
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="namespaces.html"><span>Namespaces</span></a></li>
      <li><a href="annotated.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&nbsp;List</span></a></li>
      <li><a href="globals.html"><span>File&nbsp;Members</span></a></li>
    </ul>
  </div>
<h1>wait.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// wait.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 &quot;pch.h&quot;</span>
<a name="l00004"></a>00004 <span class="preprocessor">#include &quot;wait.h&quot;</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include &quot;misc.h&quot;</span>
<a name="l00006"></a>00006 
<a name="l00007"></a>00007 <span class="preprocessor">#ifdef SOCKETS_AVAILABLE</span>
<a name="l00008"></a>00008 <span class="preprocessor"></span>
<a name="l00009"></a>00009 <span class="preprocessor">#ifdef USE_BERKELEY_STYLE_SOCKETS</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#include &lt;errno.h&gt;</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;sys/types.h&gt;</span>
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;sys/time.h&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
<a name="l00014"></a>00014 <span class="preprocessor">#endif</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00016"></a>00016 NAMESPACE_BEGIN(CryptoPP)
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 unsigned <span class="keywordtype">int</span> <a class="code" href="class_wait_object_container.html" title="container of wait objects">WaitObjectContainer</a>::MaxWaitObjects()
<a name="l00019"></a>00019 {
<a name="l00020"></a>00020 <span class="preprocessor">#ifdef USE_WINDOWS_STYLE_SOCKETS</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span>        <span class="keywordflow">return</span> MAXIMUM_WAIT_OBJECTS * (MAXIMUM_WAIT_OBJECTS-1);
<a name="l00022"></a>00022 <span class="preprocessor">#else</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>        <span class="keywordflow">return</span> FD_SETSIZE;
<a name="l00024"></a>00024 <span class="preprocessor">#endif</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>}
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 WaitObjectContainer::WaitObjectContainer(<a class="code" href="class_wait_objects_tracer.html">WaitObjectsTracer</a>* tracer)
<a name="l00028"></a>00028         : m_tracer(tracer), m_eventTimer(<a class="code" href="class_timer.html" title="high resolution timer">Timer</a>::MILLISECONDS)
<a name="l00029"></a>00029         , m_sameResultCount(0), m_noWaitTimer(<a class="code" href="class_timer.html" title="high resolution timer">Timer</a>::MILLISECONDS)
<a name="l00030"></a>00030 {
<a name="l00031"></a>00031         Clear();
<a name="l00032"></a>00032         m_eventTimer.StartTimer();
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 <span class="keywordtype">void</span> WaitObjectContainer::Clear()
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="preprocessor">#ifdef USE_WINDOWS_STYLE_SOCKETS</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>        m_handles.clear();
<a name="l00039"></a>00039 <span class="preprocessor">#else</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>        m_maxFd = 0;
<a name="l00041"></a>00041         FD_ZERO(&amp;m_readfds);
<a name="l00042"></a>00042         FD_ZERO(&amp;m_writefds);
<a name="l00043"></a>00043 <span class="preprocessor">#endif</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>        m_noWait = <span class="keyword">false</span>;
<a name="l00045"></a>00045         m_firstEventTime = 0;
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 <span class="keyword">inline</span> <span class="keywordtype">void</span> WaitObjectContainer::SetLastResult(LastResultType result)
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050         <span class="keywordflow">if</span> (result == m_lastResult)
<a name="l00051"></a>00051                 m_sameResultCount++;
<a name="l00052"></a>00052         <span class="keywordflow">else</span>
<a name="l00053"></a>00053         {
<a name="l00054"></a>00054                 m_lastResult = result;
<a name="l00055"></a>00055                 m_sameResultCount = 0;
<a name="l00056"></a>00056         }
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058 
<a name="l00059"></a>00059 <span class="keywordtype">void</span> WaitObjectContainer::DetectNoWait(LastResultType result, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061         <span class="keywordflow">if</span> (result == m_lastResult &amp;&amp; m_noWaitTimer.ElapsedTime() &gt; 1000)
<a name="l00062"></a>00062         {
<a name="l00063"></a>00063                 <span class="keywordflow">if</span> (m_sameResultCount &gt; m_noWaitTimer.ElapsedTime())
<a name="l00064"></a>00064                 {
<a name="l00065"></a>00065                         <span class="keywordflow">if</span> (m_tracer)
<a name="l00066"></a>00066                         {
<a name="l00067"></a>00067                                 std::string desc = <span class="stringliteral">&quot;No wait loop detected - m_lastResult: &quot;</span>;
<a name="l00068"></a>00068                                 desc.append(IntToString(m_lastResult)).append(<span class="stringliteral">&quot;, call stack:&quot;</span>);
<a name="l00069"></a>00069                                 <span class="keywordflow">for</span> (<a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>* cs = &amp;callStack; cs; cs = cs-&gt;Prev())
<a name="l00070"></a>00070                                         desc.append(<span class="stringliteral">&quot;\n- &quot;</span>).append(cs-&gt;Format());
<a name="l00071"></a>00071                                 m_tracer-&gt;TraceNoWaitLoop(desc);
<a name="l00072"></a>00072                         }
<a name="l00073"></a>00073                         <span class="keywordflow">try</span> { <span class="keywordflow">throw</span> 0; } <span class="keywordflow">catch</span> (...) {}         <span class="comment">// help debugger break</span>
<a name="l00074"></a>00074                 }
<a name="l00075"></a>00075 
<a name="l00076"></a>00076                 m_noWaitTimer.StartTimer();
<a name="l00077"></a>00077                 m_sameResultCount = 0;
<a name="l00078"></a>00078         }
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 
<a name="l00081"></a>00081 <span class="keywordtype">void</span> WaitObjectContainer::SetNoWait(<a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083         DetectNoWait(LASTRESULT_NOWAIT, <a class="code" href="class_call_stack.html">CallStack</a>(<span class="stringliteral">&quot;WaitObjectContainer::SetNoWait()&quot;</span>, &amp;callStack));
<a name="l00084"></a>00084         m_noWait = <span class="keyword">true</span>;
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086 
<a name="l00087"></a>00087 <span class="keywordtype">void</span> WaitObjectContainer::ScheduleEvent(<span class="keywordtype">double</span> milliseconds, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089         <span class="keywordflow">if</span> (milliseconds &lt;= 3)
<a name="l00090"></a>00090                 DetectNoWait(LASTRESULT_SCHEDULED, <a class="code" href="class_call_stack.html">CallStack</a>(<span class="stringliteral">&quot;WaitObjectContainer::ScheduleEvent()&quot;</span>, &amp;callStack));
<a name="l00091"></a>00091         <span class="keywordtype">double</span> thisEventTime = m_eventTimer.ElapsedTimeAsDouble() + milliseconds;
<a name="l00092"></a>00092         <span class="keywordflow">if</span> (!m_firstEventTime || thisEventTime &lt; m_firstEventTime)
<a name="l00093"></a>00093                 m_firstEventTime = thisEventTime;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 
<a name="l00096"></a>00096 <span class="preprocessor">#ifdef USE_WINDOWS_STYLE_SOCKETS</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span>
<a name="l00098"></a><a class="code" href="struct_waiting_thread_data.html">00098</a> <span class="keyword">struct </span><a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a>
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100         <span class="keywordtype">bool</span> waitingToWait, terminate;
<a name="l00101"></a>00101         HANDLE startWaiting, stopWaiting;
<a name="l00102"></a>00102         <span class="keyword">const</span> HANDLE *waitHandles;
<a name="l00103"></a>00103         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count;
<a name="l00104"></a>00104         HANDLE threadHandle;
<a name="l00105"></a>00105         DWORD threadId;
<a name="l00106"></a>00106         DWORD* error;
<a name="l00107"></a>00107 };
<a name="l00108"></a>00108 
<a name="l00109"></a>00109 WaitObjectContainer::~WaitObjectContainer()
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111         <span class="keywordflow">try</span>             <span class="comment">// don&apos;t let exceptions escape destructor</span>
<a name="l00112"></a>00112         {
<a name="l00113"></a>00113                 <span class="keywordflow">if</span> (!m_threads.empty())
<a name="l00114"></a>00114                 {
<a name="l00115"></a>00115                         HANDLE threadHandles[MAXIMUM_WAIT_OBJECTS];
<a name="l00116"></a>00116                         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
<a name="l00117"></a>00117                         <span class="keywordflow">for</span> (i=0; i&lt;m_threads.size(); i++)
<a name="l00118"></a>00118                         {
<a name="l00119"></a>00119                                 <a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a> &amp;thread = *m_threads[i];
<a name="l00120"></a>00120                                 <span class="keywordflow">while</span> (!thread.waitingToWait)   <span class="comment">// spin until thread is in the initial &quot;waiting to wait&quot; state</span>
<a name="l00121"></a>00121                                         Sleep(0);
<a name="l00122"></a>00122                                 thread.terminate = <span class="keyword">true</span>;
<a name="l00123"></a>00123                                 threadHandles[i] = thread.threadHandle;
<a name="l00124"></a>00124                         }
<a name="l00125"></a>00125                         PulseEvent(m_startWaiting);
<a name="l00126"></a>00126                         ::WaitForMultipleObjects((DWORD)m_threads.size(), threadHandles, TRUE, INFINITE);
<a name="l00127"></a>00127                         <span class="keywordflow">for</span> (i=0; i&lt;m_threads.size(); i++)
<a name="l00128"></a>00128                                 CloseHandle(threadHandles[i]);
<a name="l00129"></a>00129                         CloseHandle(m_startWaiting);
<a name="l00130"></a>00130                         CloseHandle(m_stopWaiting);
<a name="l00131"></a>00131                 }
<a name="l00132"></a>00132         }
<a name="l00133"></a>00133         <span class="keywordflow">catch</span> (...)
<a name="l00134"></a>00134         {
<a name="l00135"></a>00135         }
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137 
<a name="l00138"></a>00138 
<a name="l00139"></a>00139 <span class="keywordtype">void</span> WaitObjectContainer::AddHandle(HANDLE handle, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack)
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141         DetectNoWait(m_handles.size(), <a class="code" href="class_call_stack.html">CallStack</a>(<span class="stringliteral">&quot;WaitObjectContainer::AddHandle()&quot;</span>, &amp;callStack));
<a name="l00142"></a>00142         m_handles.push_back(handle);
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144 
<a name="l00145"></a>00145 DWORD WINAPI WaitingThread(LPVOID lParam)
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147         std::auto_ptr&lt;WaitingThreadData&gt; pThread((<a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a> *)lParam);
<a name="l00148"></a>00148         <a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a> &amp;thread = *pThread;
<a name="l00149"></a>00149         std::vector&lt;HANDLE&gt; handles;
<a name="l00150"></a>00150 
<a name="l00151"></a>00151         <span class="keywordflow">while</span> (<span class="keyword">true</span>)
<a name="l00152"></a>00152         {
<a name="l00153"></a>00153                 thread.waitingToWait = <span class="keyword">true</span>;
<a name="l00154"></a>00154                 ::WaitForSingleObject(thread.startWaiting, INFINITE);
<a name="l00155"></a>00155                 thread.waitingToWait = <span class="keyword">false</span>;
<a name="l00156"></a>00156 
<a name="l00157"></a>00157                 <span class="keywordflow">if</span> (thread.terminate)
<a name="l00158"></a>00158                         <span class="keywordflow">break</span>;
<a name="l00159"></a>00159                 <span class="keywordflow">if</span> (!thread.count)
<a name="l00160"></a>00160                         <span class="keywordflow">continue</span>;
<a name="l00161"></a>00161 
<a name="l00162"></a>00162                 handles.resize(thread.count + 1);
<a name="l00163"></a>00163                 handles[0] = thread.stopWaiting;
<a name="l00164"></a>00164                 std::copy(thread.waitHandles, thread.waitHandles+thread.count, handles.begin()+1);
<a name="l00165"></a>00165 
<a name="l00166"></a>00166                 DWORD result = ::WaitForMultipleObjects((DWORD)handles.size(), &amp;handles[0], FALSE, INFINITE);
<a name="l00167"></a>00167 
<a name="l00168"></a>00168                 <span class="keywordflow">if</span> (result == WAIT_OBJECT_0)
<a name="l00169"></a>00169                         <span class="keywordflow">continue</span>;       <span class="comment">// another thread finished waiting first, so do nothing</span>
<a name="l00170"></a>00170                 SetEvent(thread.stopWaiting);
<a name="l00171"></a>00171                 <span class="keywordflow">if</span> (!(result &gt; WAIT_OBJECT_0 &amp;&amp; result &lt; WAIT_OBJECT_0 + handles.size()))
<a name="l00172"></a>00172                 {
<a name="l00173"></a>00173                         assert(!<span class="stringliteral">&quot;error in WaitingThread&quot;</span>);      <span class="comment">// break here so we can see which thread has an error</span>
<a name="l00174"></a>00174                         *thread.error = ::GetLastError();
<a name="l00175"></a>00175                 }
<a name="l00176"></a>00176         }
<a name="l00177"></a>00177 
<a name="l00178"></a>00178         <span class="keywordflow">return</span> S_OK;    <span class="comment">// return a value here to avoid compiler warning</span>
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 
<a name="l00181"></a>00181 <span class="keywordtype">void</span> WaitObjectContainer::CreateThreads(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183         <span class="keywordtype">size_t</span> currentCount = m_threads.size();
<a name="l00184"></a>00184         <span class="keywordflow">if</span> (currentCount == 0)
<a name="l00185"></a>00185         {
<a name="l00186"></a>00186                 m_startWaiting = ::CreateEvent(NULL, TRUE, FALSE, NULL);
<a name="l00187"></a>00187                 m_stopWaiting = ::CreateEvent(NULL, TRUE, FALSE, NULL);
<a name="l00188"></a>00188         }
<a name="l00189"></a>00189 
<a name="l00190"></a>00190         <span class="keywordflow">if</span> (currentCount &lt; count)
<a name="l00191"></a>00191         {
<a name="l00192"></a>00192                 m_threads.resize(count);
<a name="l00193"></a>00193                 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i=currentCount; i&lt;count; i++)
<a name="l00194"></a>00194                 {
<a name="l00195"></a>00195                         m_threads[i] = <span class="keyword">new</span> <a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a>;
<a name="l00196"></a>00196                         <a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a> &amp;thread = *m_threads[i];
<a name="l00197"></a>00197                         thread.terminate = <span class="keyword">false</span>;
<a name="l00198"></a>00198                         thread.startWaiting = m_startWaiting;
<a name="l00199"></a>00199                         thread.stopWaiting = m_stopWaiting;
<a name="l00200"></a>00200                         thread.waitingToWait = <span class="keyword">false</span>;
<a name="l00201"></a>00201                         thread.threadHandle = CreateThread(NULL, 0, &amp;WaitingThread, &amp;thread, 0, &amp;thread.threadId);
<a name="l00202"></a>00202                 }
<a name="l00203"></a>00203         }
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 
<a name="l00206"></a>00206 <span class="keywordtype">bool</span> WaitObjectContainer::Wait(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> milliseconds)
<a name="l00207"></a>00207 {
<a name="l00208"></a>00208         <span class="keywordflow">if</span> (m_noWait || (m_handles.empty() &amp;&amp; !m_firstEventTime))
<a name="l00209"></a>00209         {
<a name="l00210"></a>00210                 SetLastResult(LASTRESULT_NOWAIT);
<a name="l00211"></a>00211                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00212"></a>00212         }
<a name="l00213"></a>00213 
<a name="l00214"></a>00214         <span class="keywordtype">bool</span> timeoutIsScheduledEvent = <span class="keyword">false</span>;
<a name="l00215"></a>00215 
<a name="l00216"></a>00216         <span class="keywordflow">if</span> (m_firstEventTime)
<a name="l00217"></a>00217         {
<a name="l00218"></a>00218                 <span class="keywordtype">double</span> timeToFirstEvent = SaturatingSubtract(m_firstEventTime, m_eventTimer.ElapsedTimeAsDouble());
<a name="l00219"></a>00219 
<a name="l00220"></a>00220                 <span class="keywordflow">if</span> (timeToFirstEvent &lt;= milliseconds)
<a name="l00221"></a>00221                 {
<a name="l00222"></a>00222                         milliseconds = (<span class="keywordtype">unsigned</span> long)timeToFirstEvent;
<a name="l00223"></a>00223                         timeoutIsScheduledEvent = <span class="keyword">true</span>;
<a name="l00224"></a>00224                 }
<a name="l00225"></a>00225 
<a name="l00226"></a>00226                 <span class="keywordflow">if</span> (m_handles.empty() || !milliseconds)
<a name="l00227"></a>00227                 {
<a name="l00228"></a>00228                         <span class="keywordflow">if</span> (milliseconds)
<a name="l00229"></a>00229                                 Sleep(milliseconds);
<a name="l00230"></a>00230                         SetLastResult(timeoutIsScheduledEvent ? LASTRESULT_SCHEDULED : LASTRESULT_TIMEOUT);
<a name="l00231"></a>00231                         <span class="keywordflow">return</span> timeoutIsScheduledEvent;
<a name="l00232"></a>00232                 }
<a name="l00233"></a>00233         }
<a name="l00234"></a>00234 
<a name="l00235"></a>00235         <span class="keywordflow">if</span> (m_handles.size() &gt; MAXIMUM_WAIT_OBJECTS)
<a name="l00236"></a>00236         {
<a name="l00237"></a>00237                 <span class="comment">// too many wait objects for a single WaitForMultipleObjects call, so use multiple threads</span>
<a name="l00238"></a>00238                 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> WAIT_OBJECTS_PER_THREAD = MAXIMUM_WAIT_OBJECTS-1;
<a name="l00239"></a>00239                 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nThreads = (<span class="keywordtype">unsigned</span> int)((m_handles.size() + WAIT_OBJECTS_PER_THREAD - 1) / WAIT_OBJECTS_PER_THREAD);
<a name="l00240"></a>00240                 <span class="keywordflow">if</span> (nThreads &gt; MAXIMUM_WAIT_OBJECTS)    <span class="comment">// still too many wait objects, maybe implement recursive threading later?</span>
<a name="l00241"></a>00241                         <span class="keywordflow">throw</span> Err(<span class="stringliteral">&quot;WaitObjectContainer: number of wait objects exceeds limit&quot;</span>);
<a name="l00242"></a>00242                 CreateThreads(nThreads);
<a name="l00243"></a>00243                 DWORD error = S_OK;
<a name="l00244"></a>00244                 
<a name="l00245"></a>00245                 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i&lt;m_threads.size(); i++)
<a name="l00246"></a>00246                 {
<a name="l00247"></a>00247                         <a class="code" href="struct_waiting_thread_data.html">WaitingThreadData</a> &amp;thread = *m_threads[i];
<a name="l00248"></a>00248                         <span class="keywordflow">while</span> (!thread.waitingToWait)   <span class="comment">// spin until thread is in the initial &quot;waiting to wait&quot; state</span>
<a name="l00249"></a>00249                                 Sleep(0);
<a name="l00250"></a>00250                         <span class="keywordflow">if</span> (i&lt;nThreads)
<a name="l00251"></a>00251                         {
<a name="l00252"></a>00252                                 thread.waitHandles = &amp;m_handles[i*WAIT_OBJECTS_PER_THREAD];
<a name="l00253"></a>00253                                 thread.count = UnsignedMin(WAIT_OBJECTS_PER_THREAD, m_handles.size() - i*WAIT_OBJECTS_PER_THREAD);
<a name="l00254"></a>00254                                 thread.error = &amp;error;
<a name="l00255"></a>00255                         }
<a name="l00256"></a>00256                         <span class="keywordflow">else</span>
<a name="l00257"></a>00257                                 thread.count = 0;
<a name="l00258"></a>00258                 }
<a name="l00259"></a>00259 
<a name="l00260"></a>00260                 ResetEvent(m_stopWaiting);
<a name="l00261"></a>00261                 PulseEvent(m_startWaiting);
<a name="l00262"></a>00262 
<a name="l00263"></a>00263                 DWORD result = ::WaitForSingleObject(m_stopWaiting, milliseconds);
<a name="l00264"></a>00264                 <span class="keywordflow">if</span> (result == WAIT_OBJECT_0)
<a name="l00265"></a>00265                 {
<a name="l00266"></a>00266                         <span class="keywordflow">if</span> (error == S_OK)
<a name="l00267"></a>00267                                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00268"></a>00268                         <span class="keywordflow">else</span>
<a name="l00269"></a>00269                                 <span class="keywordflow">throw</span> Err(<span class="stringliteral">&quot;WaitObjectContainer: WaitForMultipleObjects in thread failed with error &quot;</span> + IntToString(error));
<a name="l00270"></a>00270                 }
<a name="l00271"></a>00271                 SetEvent(m_stopWaiting);
<a name="l00272"></a>00272                 <span class="keywordflow">if</span> (result == WAIT_TIMEOUT)
<a name="l00273"></a>00273                 {
<a name="l00274"></a>00274                         SetLastResult(timeoutIsScheduledEvent ? LASTRESULT_SCHEDULED : LASTRESULT_TIMEOUT);
<a name="l00275"></a>00275                         <span class="keywordflow">return</span> timeoutIsScheduledEvent;
<a name="l00276"></a>00276                 }
<a name="l00277"></a>00277                 <span class="keywordflow">else</span>
<a name="l00278"></a>00278                         <span class="keywordflow">throw</span> Err(<span class="stringliteral">&quot;WaitObjectContainer: WaitForSingleObject failed with error &quot;</span> + IntToString(::GetLastError()));
<a name="l00279"></a>00279         }
<a name="l00280"></a>00280         <span class="keywordflow">else</span>
<a name="l00281"></a>00281         {
<a name="l00282"></a>00282 <span class="preprocessor">#if TRACE_WAIT</span>
<a name="l00283"></a>00283 <span class="preprocessor"></span>                <span class="keyword">static</span> <a class="code" href="class_timer.html" title="high resolution timer">Timer</a> t(Timer::MICROSECONDS);
<a name="l00284"></a>00284                 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> lastTime = 0;
<a name="l00285"></a>00285                 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeBeforeWait = t.ElapsedTime();
<a name="l00286"></a>00286 <span class="preprocessor">#endif</span>
<a name="l00287"></a>00287 <span class="preprocessor"></span>                DWORD result = ::WaitForMultipleObjects((DWORD)m_handles.size(), &amp;m_handles[0], FALSE, milliseconds);
<a name="l00288"></a>00288 <span class="preprocessor">#if TRACE_WAIT</span>
<a name="l00289"></a>00289 <span class="preprocessor"></span>                <span class="keywordflow">if</span> (milliseconds &gt; 0)
<a name="l00290"></a>00290                 {
<a name="l00291"></a>00291                         <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeAfterWait = t.ElapsedTime();
<a name="l00292"></a>00292                         OutputDebugString((<span class="stringliteral">&quot;Handles &quot;</span> + IntToString(m_handles.size()) + <span class="stringliteral">&quot;, Woke up by &quot;</span> + IntToString(result-WAIT_OBJECT_0) + <span class="stringliteral">&quot;, Busied for &quot;</span> + IntToString(timeBeforeWait-lastTime) + <span class="stringliteral">&quot; us, Waited for &quot;</span> + IntToString(timeAfterWait-timeBeforeWait) + <span class="stringliteral">&quot; us, max &quot;</span> + IntToString(milliseconds) + <span class="stringliteral">&quot;ms\n&quot;</span>).c_str());
<a name="l00293"></a>00293                         lastTime = timeAfterWait;
<a name="l00294"></a>00294                 }
<a name="l00295"></a>00295 <span class="preprocessor">#endif</span>
<a name="l00296"></a>00296 <span class="preprocessor"></span>                <span class="keywordflow">if</span> (result &gt;= WAIT_OBJECT_0 &amp;&amp; result &lt; WAIT_OBJECT_0 + m_handles.size())
<a name="l00297"></a>00297                 {
<a name="l00298"></a>00298                         <span class="keywordflow">if</span> (result == m_lastResult)
<a name="l00299"></a>00299                                 m_sameResultCount++;
<a name="l00300"></a>00300                         <span class="keywordflow">else</span>
<a name="l00301"></a>00301                         {
<a name="l00302"></a>00302                                 m_lastResult = result;
<a name="l00303"></a>00303                                 m_sameResultCount = 0;
<a name="l00304"></a>00304                         }
<a name="l00305"></a>00305                         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00306"></a>00306                 }
<a name="l00307"></a>00307                 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result == WAIT_TIMEOUT)
<a name="l00308"></a>00308                 {
<a name="l00309"></a>00309                         SetLastResult(timeoutIsScheduledEvent ? LASTRESULT_SCHEDULED : LASTRESULT_TIMEOUT);
<a name="l00310"></a>00310                         <span class="keywordflow">return</span> timeoutIsScheduledEvent;
<a name="l00311"></a>00311                 }
<a name="l00312"></a>00312                 <span class="keywordflow">else</span>
<a name="l00313"></a>00313                         <span class="keywordflow">throw</span> Err(<span class="stringliteral">&quot;WaitObjectContainer: WaitForMultipleObjects failed with error &quot;</span> + IntToString(::GetLastError()));
<a name="l00314"></a>00314         }
<a name="l00315"></a>00315 }
<a name="l00316"></a>00316 
<a name="l00317"></a>00317 <span class="preprocessor">#else // #ifdef USE_WINDOWS_STYLE_SOCKETS</span>
<a name="l00318"></a>00318 <span class="preprocessor"></span>
<a name="l00319"></a>00319 <span class="keywordtype">void</span> WaitObjectContainer::AddReadFd(<span class="keywordtype">int</span> fd, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack) <span class="comment">// TODO: do something with callStack</span>
<a name="l00320"></a>00320 {
<a name="l00321"></a>00321         FD_SET(fd, &amp;m_readfds);
<a name="l00322"></a>00322         m_maxFd = STDMAX(m_maxFd, fd);
<a name="l00323"></a>00323 }
<a name="l00324"></a>00324 
<a name="l00325"></a>00325 <span class="keywordtype">void</span> WaitObjectContainer::AddWriteFd(<span class="keywordtype">int</span> fd, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack) <span class="comment">// TODO: do something with callStack</span>
<a name="l00326"></a>00326 {
<a name="l00327"></a>00327         FD_SET(fd, &amp;m_writefds);
<a name="l00328"></a>00328         m_maxFd = STDMAX(m_maxFd, fd);
<a name="l00329"></a>00329 }
<a name="l00330"></a>00330 
<a name="l00331"></a>00331 <span class="keywordtype">bool</span> WaitObjectContainer::Wait(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> milliseconds)
<a name="l00332"></a>00332 {
<a name="l00333"></a>00333         <span class="keywordflow">if</span> (m_noWait || (!m_maxFd &amp;&amp; !m_firstEventTime))
<a name="l00334"></a>00334                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00335"></a>00335 
<a name="l00336"></a>00336         <span class="keywordtype">bool</span> timeoutIsScheduledEvent = <span class="keyword">false</span>;
<a name="l00337"></a>00337 
<a name="l00338"></a>00338         <span class="keywordflow">if</span> (m_firstEventTime)
<a name="l00339"></a>00339         {
<a name="l00340"></a>00340                 <span class="keywordtype">double</span> timeToFirstEvent = SaturatingSubtract(m_firstEventTime, m_eventTimer.ElapsedTimeAsDouble());
<a name="l00341"></a>00341                 <span class="keywordflow">if</span> (timeToFirstEvent &lt;= milliseconds)
<a name="l00342"></a>00342                 {
<a name="l00343"></a>00343                         milliseconds = (<span class="keywordtype">unsigned</span> long)timeToFirstEvent;
<a name="l00344"></a>00344                         timeoutIsScheduledEvent = <span class="keyword">true</span>;
<a name="l00345"></a>00345                 }
<a name="l00346"></a>00346         }
<a name="l00347"></a>00347 
<a name="l00348"></a>00348         timeval tv, *timeout;
<a name="l00349"></a>00349 
<a name="l00350"></a>00350         <span class="keywordflow">if</span> (milliseconds == <a class="code" href="cryptlib_8h.html#a5dc7a255dd813433eeee3152544c2f1d" title="used to represent infinite time">INFINITE_TIME</a>)
<a name="l00351"></a>00351                 timeout = NULL;
<a name="l00352"></a>00352         <span class="keywordflow">else</span>
<a name="l00353"></a>00353         {
<a name="l00354"></a>00354                 tv.tv_sec = milliseconds / 1000;
<a name="l00355"></a>00355                 tv.tv_usec = (milliseconds % 1000) * 1000;
<a name="l00356"></a>00356                 timeout = &amp;tv;
<a name="l00357"></a>00357         }
<a name="l00358"></a>00358 
<a name="l00359"></a>00359         <span class="keywordtype">int</span> result = select(m_maxFd+1, &amp;m_readfds, &amp;m_writefds, NULL, timeout);
<a name="l00360"></a>00360 
<a name="l00361"></a>00361         <span class="keywordflow">if</span> (result &gt; 0)
<a name="l00362"></a>00362                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00363"></a>00363         <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result == 0)
<a name="l00364"></a>00364                 <span class="keywordflow">return</span> timeoutIsScheduledEvent;
<a name="l00365"></a>00365         <span class="keywordflow">else</span>
<a name="l00366"></a>00366                 <span class="keywordflow">throw</span> Err(<span class="stringliteral">&quot;WaitObjectContainer: select failed with error &quot;</span> + errno);
<a name="l00367"></a>00367 }
<a name="l00368"></a>00368 
<a name="l00369"></a>00369 <span class="preprocessor">#endif</span>
<a name="l00370"></a>00370 <span class="preprocessor"></span>
<a name="l00371"></a>00371 <span class="comment">// ********************************************************</span>
<a name="l00372"></a>00372 
<a name="l00373"></a>00373 std::string CallStack::Format()<span class="keyword"> const</span>
<a name="l00374"></a>00374 <span class="keyword"></span>{
<a name="l00375"></a>00375         <span class="keywordflow">return</span> m_info;
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377 
<a name="l00378"></a>00378 std::string CallStackWithNr::Format()<span class="keyword"> const</span>
<a name="l00379"></a>00379 <span class="keyword"></span>{
<a name="l00380"></a>00380         <span class="keywordflow">return</span> std::string(m_info) + <span class="stringliteral">&quot; / nr: &quot;</span> + IntToString(m_nr);
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382 
<a name="l00383"></a>00383 std::string CallStackWithStr::Format()<span class="keyword"> const</span>
<a name="l00384"></a>00384 <span class="keyword"></span>{
<a name="l00385"></a>00385         <span class="keywordflow">return</span> std::string(m_info) + <span class="stringliteral">&quot; / &quot;</span> + std::string(m_z);
<a name="l00386"></a>00386 }
<a name="l00387"></a>00387 
<a name="l00388"></a><a class="code" href="class_waitable.html#aded81bbe562f61932306a64e6122a6ca">00388</a> <span class="keywordtype">bool</span> <a class="code" href="class_waitable.html#aded81bbe562f61932306a64e6122a6ca" title="wait on this object">Waitable::Wait</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> milliseconds, <a class="code" href="class_call_stack.html">CallStack</a> <span class="keyword">const</span>&amp; callStack)
<a name="l00389"></a>00389 {
<a name="l00390"></a>00390         <a class="code" href="class_wait_object_container.html" title="container of wait objects">WaitObjectContainer</a> container;
<a name="l00391"></a>00391         <a class="code" href="class_waitable.html#a97155f28db33d3dacc69dc453a01609a" title="put wait objects into container">GetWaitObjects</a>(container, callStack);   <span class="comment">// reduce clutter by not adding this func to stack</span>
<a name="l00392"></a>00392         <span class="keywordflow">return</span> container.Wait(milliseconds);
<a name="l00393"></a>00393 }
<a name="l00394"></a>00394 
<a name="l00395"></a>00395 NAMESPACE_END
<a name="l00396"></a>00396 
<a name="l00397"></a>00397 <span class="preprocessor">#endif</span>
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated on 9 Dec 2009 for Crypto++ by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.1 </small></address>
</body>
</html>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional