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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>libpion: /Users/mdickey/code/libpion-export/src/PionEngine.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="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul></div><h1>/Users/mdickey/code/libpion-export/src/PionEngine.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -----------------------------------------------------------------</span><a name="l00002"></a>00002 <span class="comment">// libpion: a C++ framework for building lightweight HTTP interfaces</span><a name="l00003"></a>00003 <span class="comment">// -----------------------------------------------------------------</span><a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007 Atomic Labs, Inc. (http://www.atomiclabs.com)</span><a name="l00005"></a>00005 <span class="comment">//</span><a name="l00006"></a>00006 <span class="comment">// Distributed under the Boost Software License, Version 1.0.</span><a name="l00007"></a>00007 <span class="comment">// See accompanying file COPYING or copy at http://www.boost.org/LICENSE_1_0.txt</span><a name="l00008"></a>00008 <span class="comment">//</span><a name="l00009"></a>00009 <a name="l00010"></a>00010 <span class="preprocessor">#include <libpion/PionEngine.hpp></span><a name="l00011"></a>00011 <span class="preprocessor">#include <boost/bind.hpp></span><a name="l00012"></a>00012 <span class="preprocessor">#ifdef PION_WIN32</span><a name="l00013"></a>00013 <span class="preprocessor"></span> <span class="comment">// for Windows shutdown crash work-around</span><a name="l00014"></a>00014 <span class="preprocessor"> #include <boost/thread/xtime.hpp></span><a name="l00015"></a>00015 <span class="preprocessor"> #include <ctime></span><a name="l00016"></a>00016 <span class="preprocessor">#endif</span><a name="l00017"></a>00017 <span class="preprocessor"></span><a name="l00018"></a>00018 <a name="l00019"></a>00019 <span class="keyword">namespace </span>pion { <span class="comment">// begin namespace pion</span><a name="l00020"></a>00020 <a name="l00021"></a>00021 <a name="l00022"></a>00022 <span class="comment">// static members of PionEngine</span><a name="l00023"></a>00023 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> PionEngine::DEFAULT_NUM_THREADS = 5;<a name="l00024"></a>00024 PionEngine * PionEngine::m_instance_ptr = NULL;<a name="l00025"></a>00025 boost::once_flag PionEngine::m_instance_flag = BOOST_ONCE_INIT;<a name="l00026"></a>00026 <a name="l00027"></a>00027 <a name="l00028"></a>00028 <span class="comment">// PionEngine member functions</span><a name="l00029"></a>00029 <a name="l00030"></a>00030 <span class="keywordtype">void</span> PionEngine::createInstance(<span class="keywordtype">void</span>)<a name="l00031"></a>00031 {<a name="l00032"></a>00032 <span class="keyword">static</span> PionEngine pion_instance;<a name="l00033"></a>00033 m_instance_ptr = &pion_instance;<a name="l00034"></a>00034 }<a name="l00035"></a>00035 <a name="l00036"></a><a class="code" href="classpion_1_1_pion_engine.html#82d766568a1629f92f36ff6930ba0751">00036</a> <span class="keywordtype">void</span> PionEngine::start(<span class="keywordtype">void</span>)<a name="l00037"></a>00037 {<a name="l00038"></a>00038 <span class="comment">// check for errors</span><a name="l00039"></a>00039 <span class="keywordflow">if</span> (m_is_running) <span class="keywordflow">throw</span> <a class="code" href="classpion_1_1_pion_engine_1_1_already_started_exception.html" title="exception thrown if start() is called after Pion is running">AlreadyStartedException</a>();<a name="l00040"></a>00040 <span class="keywordflow">if</span> (m_servers.empty()) <span class="keywordflow">throw</span> <a class="code" href="classpion_1_1_pion_engine_1_1_no_servers_exception.html" title="exception thrown if start() is called before any servers are defined">NoServersException</a>();<a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="comment">// lock mutex for thread safety</span><a name="l00043"></a>00043 boost::mutex::scoped_lock engine_lock(m_mutex);<a name="l00044"></a>00044 <a name="l00045"></a>00045 PION_LOG_INFO(m_logger, <span class="stringliteral">"Starting up"</span>);<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="comment">// schedule async tasks to listen for each server</span><a name="l00048"></a>00048 <span class="keywordflow">for</span> (TCPServerMap::iterator i = m_servers.begin(); i!=m_servers.end(); ++i) {<a name="l00049"></a>00049 i->second->start();<a name="l00050"></a>00050 }<a name="l00051"></a>00051 <a name="l00052"></a>00052 <span class="comment">// start multiple threads to handle async tasks</span><a name="l00053"></a>00053 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n = 0; n < m_num_threads; ++n) {<a name="l00054"></a>00054 boost::shared_ptr<boost::thread> new_thread(<span class="keyword">new</span> boost::thread( boost::bind(&PionEngine::run, <span class="keyword">this</span>) ));<a name="l00055"></a>00055 m_thread_pool.push_back(new_thread);<a name="l00056"></a>00056 }<a name="l00057"></a>00057 <a name="l00058"></a>00058 m_is_running = <span class="keyword">true</span>;<a name="l00059"></a>00059 }<a name="l00060"></a>00060 <a name="l00061"></a><a class="code" href="classpion_1_1_pion_engine.html#2c6d002ad46191a4c4c4046537db329e">00061</a> <span class="keywordtype">void</span> <a class="code" href="classpion_1_1_pion_engine.html#2c6d002ad46191a4c4c4046537db329e">PionEngine::stop</a>(<span class="keyword">const</span> <span class="keywordtype">bool</span> reset_servers)<a name="l00062"></a>00062 {<a name="l00063"></a>00063 <span class="comment">// lock mutex for thread safety</span><a name="l00064"></a>00064 boost::mutex::scoped_lock engine_lock(m_mutex);<a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keywordflow">if</span> (m_is_running) {<a name="l00067"></a>00067 <a name="l00068"></a>00068 PION_LOG_INFO(m_logger, <span class="stringliteral">"Shutting down"</span>);<a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="comment">// stop listening for new connections</span><a name="l00071"></a>00071 <span class="keywordflow">for</span> (TCPServerMap::iterator i = m_servers.begin(); i!=m_servers.end(); ++i) {<a name="l00072"></a>00072 i->second->stop();<a name="l00073"></a>00073 }<a name="l00074"></a>00074 <a name="l00075"></a>00075 <span class="keywordflow">if</span> (! m_thread_pool.empty()) {<a name="l00076"></a>00076 PION_LOG_DEBUG(m_logger, <span class="stringliteral">"Waiting for threads to shutdown"</span>);<a name="l00077"></a>00077 <a name="l00078"></a>00078 <span class="comment">// wait until all threads in the pool have stopped</span>⌨️ 快捷键说明
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