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RCF - Interprocess Communication for C++

, 25 Oct 2011
A server/client IPC framework, using the C++ preprocessor as an IDL compiler.
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<title>RCF: TcpAsioClientTransport.hpp Source File</title>
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<h1>TcpAsioClientTransport.hpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 
<a name="l00002"></a>00002 <span class="comment">//*****************************************************************************</span>
<a name="l00003"></a>00003 <span class="comment">// RCF - Remote Call Framework</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (c) 2005. All rights reserved.</span>
<a name="l00005"></a>00005 <span class="comment">// Developed by Jarl Lindrud.</span>
<a name="l00006"></a>00006 <span class="comment">// Contact: jlindrud@hotmail.com .</span>
<a name="l00007"></a>00007 <span class="comment">//*****************************************************************************</span>
<a name="l00008"></a>00008 
<a name="l00009"></a>00009 <span class="preprocessor">#ifndef INCLUDE_RCF_TCPASIOCLIENT_TRANSPORT_HPP</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDE_RCF_TCPASIOCLIENT_TRANSPORT_HPP</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;boost/shared_ptr.hpp&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;boost/asio.hpp&gt;</span>
<a name="l00014"></a>00014 
<a name="l00015"></a>00015 <span class="preprocessor">#include &lt;RCF/ClientTransport.hpp&gt;</span>
<a name="l00016"></a>00016 <span class="preprocessor">#include &lt;RCF/ThreadLibrary.hpp&gt;</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="keyword">namespace </span>RCF {
<a name="l00019"></a>00019 
<a name="l00020"></a>00020     <span class="keyword">namespace </span>asio = boost::asio;
<a name="l00021"></a>00021 
<a name="l00022"></a>00022     <span class="keyword">class                               </span>TcpAsioSynchronizedSocket;
<a name="l00023"></a>00023     <span class="keyword">class                               </span>TcpAsioServerTransport;
<a name="l00024"></a>00024     <span class="keyword">typedef</span> asio::io_service            Demuxer;
<a name="l00025"></a>00025     <span class="keyword">typedef</span> boost::shared_ptr&lt;Demuxer&gt;  DemuxerPtr;
<a name="l00026"></a>00026 
<a name="l00027"></a>00027     <span class="keyword">class </span>TcpAsioClientTransport : <span class="keyword">public</span> I_ClientTransport
<a name="l00028"></a>00028     {
<a name="l00029"></a>00029     <span class="keyword">public</span>:
<a name="l00030"></a>00030         TcpAsioClientTransport(<span class="keyword">const</span> std::string &amp;ip, <span class="keywordtype">int</span> port, DemuxerPtr demuxerPtr = getSharedDemuxerPtr()<span class="comment">/* DemuxerPtr()*/</span>);
<a name="l00031"></a>00031         TcpAsioClientTransport(<span class="keyword">const</span> TcpAsioClientTransport &amp;rhs);
<a name="l00032"></a>00032         ~TcpAsioClientTransport();
<a name="l00033"></a>00033 
<a name="l00034"></a>00034         <span class="comment">// I_ClientTransport implementation</span>
<a name="l00035"></a>00035         ClientTransportAutoPtr      clone() <span class="keyword">const</span>;
<a name="l00036"></a>00036         EndpointPtr                 getEndpointPtr() <span class="keyword">const</span>;
<a name="l00037"></a>00037         <span class="keywordtype">int</span>                         send(<span class="keyword">const</span> std::string &amp;data, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> timeoutMs);
<a name="l00038"></a>00038         <span class="keywordtype">int</span>                         receive(std::string &amp;data, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> timeoutMs);
<a name="l00039"></a>00039         <span class="keywordtype">bool</span>                        isConnected();
<a name="l00040"></a>00040         <span class="keywordtype">void</span>                        close();
<a name="l00041"></a>00041         <span class="keywordtype">void</span>                        setTransportFilters(<span class="keyword">const</span> std::vector&lt;FilterPtr&gt; &amp;filters);
<a name="l00042"></a>00042 
<a name="l00043"></a>00043     <span class="keyword">private</span>:
<a name="l00044"></a>00044         <span class="keyword">friend</span> <span class="keyword">class </span>TcpAsioServerTransport;
<a name="l00045"></a>00045         <span class="keyword">typedef</span> TcpAsioSynchronizedSocket               SynchronizedSocket;
<a name="l00046"></a>00046         <span class="keyword">typedef</span> boost::shared_ptr&lt;SynchronizedSocket&gt;   SynchronizedSocketPtr;
<a name="l00047"></a>00047         TcpAsioClientTransport(SynchronizedSocketPtr synchronizedSocketPtr, DemuxerPtr demuxerPtr = getSharedDemuxerPtr()<span class="comment">/* DemuxerPtr()*/</span>);
<a name="l00048"></a>00048         SynchronizedSocketPtr       releaseSynchronizedSocketPtr();
<a name="l00049"></a>00049         SynchronizedSocketPtr       getSynchronizedSocketPtr();
<a name="l00050"></a>00050 
<a name="l00051"></a>00051     <span class="keyword">private</span>:
<a name="l00052"></a>00052         <span class="keywordtype">int</span>                         connect();
<a name="l00053"></a>00053         <span class="keywordtype">void</span>                        readSingle(<span class="keywordtype">char</span> *buffer, std::size_t bufferLen);
<a name="l00054"></a>00054         <span class="keywordtype">void</span>                        writeSingle(<span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, std::size_t bufferLen);
<a name="l00055"></a>00055         std::size_t                 read(<span class="keywordtype">char</span> *buffer, std::size_t bufferLen);
<a name="l00056"></a>00056         std::size_t                 write(<span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, std::size_t bufferLen);
<a name="l00057"></a>00057         <span class="keywordtype">int</span>                         errFromAsioErr();
<a name="l00058"></a>00058         <span class="keywordtype">void</span>                        onFilteredReadWriteCompletion(std::size_t bytesTransferred, <span class="keywordtype">int</span> error);
<a name="l00059"></a>00059 
<a name="l00060"></a>00060         <span class="comment">// shared instance functions</span>
<a name="l00061"></a>00061     <span class="keyword">private</span>:
<a name="l00062"></a>00062         <span class="keyword">class </span>State;
<a name="l00063"></a>00063         <span class="keyword">typedef</span> boost::shared_ptr&lt;State&gt;    StatePtr;
<a name="l00064"></a>00064         
<a name="l00065"></a>00065         <span class="keyword">static</span> ReadWriteMutexPtr *  spReadWriteMutexPtr;
<a name="l00066"></a>00066         <span class="keyword">static</span> DemuxerPtr *         spDemuxerPtr;
<a name="l00067"></a>00067     <span class="keyword">public</span>:
<a name="l00068"></a>00068         <span class="keyword">static</span> <span class="keywordtype">void</span>                 init();
<a name="l00069"></a>00069         <span class="keyword">static</span> <span class="keywordtype">void</span>                 deinit();
<a name="l00070"></a>00070         <span class="keyword">static</span> ReadWriteMutexPtr    getSharedReadWriteMutexPtr();
<a name="l00071"></a>00071         <span class="keyword">static</span> DemuxerPtr           getSharedDemuxerPtr();
<a name="l00072"></a>00072 
<a name="l00073"></a>00073         <span class="comment">// data</span>
<a name="l00074"></a>00074     <span class="keyword">private</span>:
<a name="l00075"></a>00075 
<a name="l00076"></a>00076         <span class="keyword">class </span>State
<a name="l00077"></a>00077         {
<a name="l00078"></a>00078         <span class="keyword">public</span>:
<a name="l00079"></a>00079             State(Demuxer &amp;demuxer) : mTimer(demuxer), mBytesTransferred(), mTimeoutFlag() {}
<a name="l00080"></a>00080             asio::deadline_timer mTimer;
<a name="l00081"></a>00081             std::size_t mBytesTransferred;
<a name="l00082"></a>00082             <span class="keyword">volatile</span> <span class="keywordtype">bool</span> mTimeoutFlag;
<a name="l00083"></a>00083             asio::error mError;
<a name="l00084"></a>00084             Mutex mEventMutex;
<a name="l00085"></a>00085             Condition mEvent;
<a name="l00086"></a>00086         };
<a name="l00087"></a>00087         
<a name="l00088"></a>00088         DemuxerPtr                          mDemuxerPtr;
<a name="l00089"></a>00089         SynchronizedSocketPtr               mSynchronizedSocketPtr;
<a name="l00090"></a>00090         
<a name="l00091"></a>00091         <span class="comment">// following are at times generated lazily, hence the mutable</span>
<a name="l00092"></a>00092         <span class="keyword">mutable</span> std::string                 mIp;
<a name="l00093"></a>00093         <span class="keyword">mutable</span> <span class="keywordtype">int</span>                         mPort;
<a name="l00094"></a>00094         <span class="keyword">mutable</span> asio::ip::tcp::endpoint     mEndpoint;
<a name="l00095"></a>00095 
<a name="l00096"></a>00096         std::vector&lt;FilterPtr&gt;              mTransportFilters;
<a name="l00097"></a>00097         std::vector&lt;char&gt;                   mReadBuffer;
<a name="l00098"></a>00098         std::vector&lt;char&gt;                   mWriteBuffer;
<a name="l00099"></a>00099         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>                        mEndTimeMs;
<a name="l00100"></a>00100         
<a name="l00101"></a>00101         StatePtr                            mStatePtr;
<a name="l00102"></a>00102 
<a name="l00103"></a>00103         asio::deadline_timer &amp;              mTimer;
<a name="l00104"></a>00104         std::size_t &amp;                       mBytesTransferred;
<a name="l00105"></a>00105         <span class="keyword">volatile</span> <span class="keywordtype">bool</span> &amp;                     mTimeoutFlag;
<a name="l00106"></a>00106         asio::error &amp;                       mError;
<a name="l00107"></a>00107         Mutex &amp;                             mEventMutex;
<a name="l00108"></a>00108         Condition &amp;                         mEvent;
<a name="l00109"></a>00109     };
<a name="l00110"></a>00110 
<a name="l00111"></a>00111 } <span class="comment">// namespace RCF</span>
<a name="l00112"></a>00112 
<a name="l00113"></a>00113 <span class="preprocessor">#endif // ! INCLUDE_RCF_TCPASIOCLIENT_TRANSPORT_HPP</span>
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About the Author

Jarl Lindrud

Australia Australia
Software developer, ex-resident of Sweden and now living in Canberra, Australia, working on distributed C++ applications. Jarl enjoys programming, but prefers skiing and playing table tennis. He derives immense satisfaction from referring to himself in third person.

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