network_8cpp-source.html

著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

<a name="l00092"></a>00092         lword maxSize = byteCount;
<a name="l00093"></a>00093         byteCount = 0;
<a name="l00094"></a>00094 
<a name="l00095"></a>00095         timer.<a class="code" href="class_timer_base.html#50804b61c4254f7289c6c67515d5d46d">StartTimer</a>();
<a name="l00096"></a>00096 
<a name="l00097"></a>00097         <span class="keywordflow">while</span> (<span class="keyword">true</span>)
<a name="l00098"></a>00098         {
<a name="l00099"></a>00099                 lword curMaxSize = UnsignedMin(<a class="code" href="class_limited_bandwidth.html#619226f8c399a4e03c6685bfa3e5b40f">ComputeCurrentTransceiveLimit</a>(), maxSize - byteCount);
<a name="l00100"></a>00100 
<a name="l00101"></a>00101                 <span class="keywordflow">if</span> (curMaxSize || m_doPumpBlocked)
<a name="l00102"></a>00102                 {
<a name="l00103"></a>00103                         <span class="keywordflow">if</span> (!forever) timeToGo = SaturatingSubtract(maxTime, timer.<a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">ElapsedTime</a>());
<a name="l00104"></a>00104                         <span class="keywordtype">size_t</span> ret = DoPump(curMaxSize, blockingOutput, timeToGo, checkDelimiter, delimiter);
<a name="l00105"></a>00105                         m_doPumpBlocked = (ret != 0);
<a name="l00106"></a>00106                         <span class="keywordflow">if</span> (curMaxSize)
<a name="l00107"></a>00107                         {
<a name="l00108"></a>00108                                 <a class="code" href="class_limited_bandwidth.html#f5922e286ecf2d6cc9f1c018f5ca6871">NoteTransceive</a>(curMaxSize);
<a name="l00109"></a>00109                                 byteCount += curMaxSize;
<a name="l00110"></a>00110                         }
<a name="l00111"></a>00111                         <span class="keywordflow">if</span> (ret)
<a name="l00112"></a>00112                                 <span class="keywordflow">return</span> ret;
<a name="l00113"></a>00113                 }
<a name="l00114"></a>00114 
<a name="l00115"></a>00115                 <span class="keywordflow">if</span> (maxSize != ULONG_MAX &amp;&amp; byteCount &gt;= maxSize)
<a name="l00116"></a>00116                         <span class="keywordflow">break</span>;
<a name="l00117"></a>00117 
<a name="l00118"></a>00118                 <span class="keywordflow">if</span> (!forever)
<a name="l00119"></a>00119                 {
<a name="l00120"></a>00120                         timeToGo = SaturatingSubtract(maxTime, timer.<a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">ElapsedTime</a>());
<a name="l00121"></a>00121                         <span class="keywordflow">if</span> (!timeToGo)
<a name="l00122"></a>00122                                 <span class="keywordflow">break</span>;
<a name="l00123"></a>00123                 }
<a name="l00124"></a>00124 
<a name="l00125"></a>00125                 <span class="keywordtype">double</span> waitTime = <a class="code" href="class_limited_bandwidth.html#ef86232b3bce4c5385f2a1137d63788f">TimeToNextTransceive</a>();
<a name="l00126"></a>00126                 <span class="keywordflow">if</span> (!forever &amp;&amp; waitTime &gt; timeToGo)
<a name="l00127"></a>00127                 {
<a name="l00128"></a>00128                         m_blockedBySpeedLimit = <span class="keyword">true</span>;
<a name="l00129"></a>00129                         <span class="keywordflow">break</span>;
<a name="l00130"></a>00130                 }
<a name="l00131"></a>00131 
<a name="l00132"></a>00132                 <a class="code" href="class_wait_object_container.html" title="container of wait objects">WaitObjectContainer</a> container;
<a name="l00133"></a>00133                 <a class="code" href="class_limited_bandwidth.html#be3aabb618510d9629c1a65382fbfdb3">LimitedBandwidth::GetWaitObjects</a>(container, <a class="code" href="class_call_stack.html">CallStack</a>(<span class="stringliteral">"NonblockingSource::GeneralPump2() - speed limit"</span>, 0));
<a name="l00134"></a>00134                 container.<a class="code" href="class_wait_object_container.html#15356e5e6f3329d8056ed7ba53290be6">Wait</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)waitTime);
<a name="l00135"></a>00135         }
<a name="l00136"></a>00136 
<a name="l00137"></a>00137         <span class="keywordflow">return</span> 0;
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139 
<a name="l00140"></a><a class="code" href="class_nonblocking_source.html#7605b106c17daac3ad63149a03f0fbce">00140</a> <span class="keywordtype">size_t</span> <a class="code" href="class_nonblocking_source.html#7605b106c17daac3ad63149a03f0fbce">NonblockingSource::PumpMessages2</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &amp;messageCount, <span class="keywordtype">bool</span> blocking)
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142         <span class="keywordflow">if</span> (messageCount == 0)
<a name="l00143"></a>00143                 <span class="keywordflow">return</span> 0;
<a name="l00144"></a>00144 
<a name="l00145"></a>00145         messageCount = 0;
<a name="l00146"></a>00146 
<a name="l00147"></a>00147         lword byteCount;
<a name="l00148"></a>00148         <span class="keywordflow">do</span> {
<a name="l00149"></a>00149                 byteCount = LWORD_MAX;
<a name="l00150"></a>00150                 RETURN_IF_NONZERO(<a class="code" href="class_nonblocking_source.html#6d75b28015a06d4215c44a3dd2593a72">Pump2</a>(byteCount, blocking));
<a name="l00151"></a>00151         } <span class="keywordflow">while</span>(byteCount == LWORD_MAX);
<a name="l00152"></a>00152 
<a name="l00153"></a>00153         <span class="keywordflow">if</span> (!m_messageEndSent &amp;&amp; SourceExhausted())
<a name="l00154"></a>00154         {
<a name="l00155"></a>00155                 RETURN_IF_NONZERO(<a class="code" href="class_filter.html#c8fc888888b2dad88bf64fc703044a93" title="returns the object immediately attached to this object or NULL for no attachment">AttachedTransformation</a>()-&gt;<a class="code" href="class_input_rejecting.html#0ff99108aa0d11f44a0ca49d056bc7cb" title="input multiple bytes for blocking or non-blocking processing">Put2</a>(NULL, 0, <a class="code" href="class_auto_signaling.html#011dc89743a4790bdd2ddefd9f176766">GetAutoSignalPropagation</a>(), <span class="keyword">true</span>));
<a name="l00156"></a>00156                 m_messageEndSent = <span class="keyword">true</span>;
<a name="l00157"></a>00157                 messageCount = 1;
<a name="l00158"></a>00158         }
<a name="l00159"></a>00159         <span class="keywordflow">return</span> 0;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 
<a name="l00162"></a><a class="code" href="class_nonblocking_sink.html#f5da8dc12d42cf6152588ab02de4d336">00162</a> lword <a class="code" href="class_nonblocking_sink.html#f5da8dc12d42cf6152588ab02de4d336" title="flush to device for no more than maxTime milliseconds">NonblockingSink::TimedFlush</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> maxTime, <span class="keywordtype">size_t</span> targetSize)
<a name="l00163"></a>00163 {
<a name="l00164"></a>00164         m_blockedBySpeedLimit = <span class="keyword">false</span>;
<a name="l00165"></a>00165 
<a name="l00166"></a>00166         <span class="keywordtype">size_t</span> curBufSize = GetCurrentBufferSize();
<a name="l00167"></a>00167         <span class="keywordflow">if</span> (curBufSize &lt;= targetSize &amp;&amp; (targetSize || !EofPending()))
<a name="l00168"></a>00168                 <span class="keywordflow">return</span> 0;
<a name="l00169"></a>00169 
<a name="l00170"></a>00170         <span class="keywordflow">if</span> (!<a class="code" href="class_limited_bandwidth.html#6bd1d7ab2fd038e150e058a30700b989">GetMaxBytesPerSecond</a>())
<a name="l00171"></a>00171                 <span class="keywordflow">return</span> DoFlush(maxTime, targetSize);
<a name="l00172"></a>00172 
<a name="l00173"></a>00173         <span class="keywordtype">bool</span> forever = (maxTime == <a class="code" href="cryptlib_8h.html#5dc7a255dd813433eeee3152544c2f1d" title="used to represent infinite time">INFINITE_TIME</a>);
<a name="l00174"></a>00174         <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeToGo = maxTime;
<a name="l00175"></a>00175         <a class="code" href="class_timer.html" title="high resolution timer">Timer</a> timer(<a class="code" href="class_timer_base.html#ce15d479a8bb76027f1f572010f62fb99a21aebaffc991a16f40f070792f89bf">Timer::MILLISECONDS</a>, forever);
<a name="l00176"></a>00176         lword totalFlushed = 0;
<a name="l00177"></a>00177 
<a name="l00178"></a>00178         timer.<a class="code" href="class_timer_base.html#50804b61c4254f7289c6c67515d5d46d">StartTimer</a>();
<a name="l00179"></a>00179 
<a name="l00180"></a>00180         <span class="keywordflow">while</span> (<span class="keyword">true</span>)
<a name="l00181"></a>00181         {       
<a name="l00182"></a>00182                 <span class="keywordtype">size_t</span> flushSize = UnsignedMin(curBufSize - targetSize, <a class="code" href="class_limited_bandwidth.html#619226f8c399a4e03c6685bfa3e5b40f">ComputeCurrentTransceiveLimit</a>());
<a name="l00183"></a>00183                 <span class="keywordflow">if</span> (flushSize || EofPending())
<a name="l00184"></a>00184                 {
<a name="l00185"></a>00185                         <span class="keywordflow">if</span> (!forever) timeToGo = SaturatingSubtract(maxTime, timer.<a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">ElapsedTime</a>());
<a name="l00186"></a>00186                         <span class="keywordtype">size_t</span> ret = (size_t)DoFlush(timeToGo, curBufSize - flushSize);
<a name="l00187"></a>00187                         <span class="keywordflow">if</span> (ret)
<a name="l00188"></a>00188                         {
<a name="l00189"></a>00189                                 <a class="code" href="class_limited_bandwidth.html#f5922e286ecf2d6cc9f1c018f5ca6871">NoteTransceive</a>(ret);
<a name="l00190"></a>00190                                 curBufSize -= ret;
<a name="l00191"></a>00191                                 totalFlushed += ret;
<a name="l00192"></a>00192                         }
<a name="l00193"></a>00193                 }
<a name="l00194"></a>00194 
<a name="l00195"></a>00195                 <span class="keywordflow">if</span> (curBufSize &lt;= targetSize &amp;&amp; (targetSize || !EofPending()))
<a name="l00196"></a>00196                         <span class="keywordflow">break</span>;
<a name="l00197"></a>00197 
<a name="l00198"></a>00198                 <span class="keywordflow">if</span> (!forever)
<a name="l00199"></a>00199                 {
<a name="l00200"></a>00200                         timeToGo = SaturatingSubtract(maxTime, timer.<a class="code" href="class_timer_base.html#eab32d0bc5ca83836e0e9f9e108d66a4">ElapsedTime</a>());
<a name="l00201"></a>00201                         <span class="keywordflow">if</span> (!timeToGo)
<a name="l00202"></a>00202                                 <span class="keywordflow">break</span>;
<a name="l00203"></a>00203                 }