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RCF - Interprocess Communication for C++

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25 Oct 2011CPOL20 min read 4.6M   8.4K   331  
A server/client IPC framework, using the C++ preprocessor as an IDL compiler.
 
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<a class="el" href="dir_G_3A_2FDevelopment_2Fbuild_2Fscripts_2Fwin_2FBuildRcf2_5FOutput_2FRCF_2D0_2E4_2Finclude_2F.html">include</a>&nbsp;&raquo&nbsp;<a class="el" href="dir_G_3A_2FDevelopment_2Fbuild_2Fscripts_2Fwin_2FBuildRcf2_5FOutput_2FRCF_2D0_2E4_2Finclude_2FRCF_2F.html">RCF</a></div>
<h1>TimedBsdSockets.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_TIMEDBSDSOCKETS_HPP</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDE_RCF_TIMEDBSDSOCKETS_HPP</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span>
<a name="l00012"></a>00012 <span class="comment">//#include &lt;RCF/Tools.hpp&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;RCF/UsingBsdSockets.hpp&gt;</span>
<a name="l00014"></a>00014 
<a name="l00015"></a>00015 
<a name="l00016"></a>00016 <span class="keyword">namespace </span>RCF {
<a name="l00017"></a>00017 
<a name="l00018"></a>00018     <span class="comment">//******************************************************</span>
<a name="l00019"></a>00019     <span class="comment">// nonblocking socket routines</span>
<a name="l00020"></a>00020 
<a name="l00021"></a>00021     <span class="keywordtype">int</span> timedConnect(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> timeoutMs, <span class="keywordtype">int</span> fd, sockaddr *addr, <span class="keywordtype">int</span> addrLen);
<a name="l00022"></a>00022     <span class="comment">/*</span>
<a name="l00023"></a>00023 <span class="comment">    {</span>
<a name="l00024"></a>00024 <span class="comment">        unsigned int startTimeMs = getCurrentTimeMs();</span>
<a name="l00025"></a>00025 <span class="comment">        unsigned int endTimeMs = startTimeMs + timeoutMs;</span>
<a name="l00026"></a>00026 <span class="comment">        int ret = Platform::OS::BsdSockets::connect(fd, addr, addrLen);</span>
<a name="l00027"></a>00027 <span class="comment">        if ((ret == -1 &amp;&amp; Platform::OS::BsdSockets::GetLastError() == Platform::OS::BsdSockets::ERR_EWOULDBLOCK) ||</span>
<a name="l00028"></a>00028 <span class="comment">            (ret == -1 &amp;&amp; Platform::OS::BsdSockets::GetLastError() == Platform::OS::BsdSockets::ERR_EINPROGRESS))</span>
<a name="l00029"></a>00029 <span class="comment">        {</span>
<a name="l00030"></a>00030 <span class="comment">            fd_set fdSet;</span>
<a name="l00031"></a>00031 <span class="comment">            FD_ZERO(&amp;fdSet);</span>
<a name="l00032"></a>00032 <span class="comment">            FD_SET(fd, &amp;fdSet);</span>
<a name="l00033"></a>00033 <span class="comment">            unsigned int timeoutMs = generateTimeoutMs(endTimeMs);</span>
<a name="l00034"></a>00034 <span class="comment">            timeval timeout;</span>
<a name="l00035"></a>00035 <span class="comment">            timeout.tv_sec = timeoutMs/1000;</span>
<a name="l00036"></a>00036 <span class="comment">            timeout.tv_usec = 1000*(timeoutMs%1000);</span>
<a name="l00037"></a>00037 <span class="comment">            if (timeout.tv_usec &lt; 0)</span>
<a name="l00038"></a>00038 <span class="comment">            {</span>
<a name="l00039"></a>00039 <span class="comment">                timeout.tv_usec = 0;</span>
<a name="l00040"></a>00040 <span class="comment">            }</span>
<a name="l00041"></a>00041 <span class="comment">            ret = Platform::OS::BsdSockets::select(fd+1, NULL, &amp;fdSet, NULL, &amp;timeout);</span>
<a name="l00042"></a>00042 <span class="comment">            if (ret == 1)</span>
<a name="l00043"></a>00043 <span class="comment">            {</span>
<a name="l00044"></a>00044 <span class="comment">                return 0;</span>
<a name="l00045"></a>00045 <span class="comment">            }</span>
<a name="l00046"></a>00046 <span class="comment">            else if (ret == 0)</span>
<a name="l00047"></a>00047 <span class="comment">            {</span>
<a name="l00048"></a>00048 <span class="comment">                RCF_TRACE("timedConnect - timeout")(fd)(timeout.tv_sec)(timeout.tv_usec);</span>
<a name="l00049"></a>00049 <span class="comment">                return -1;</span>
<a name="l00050"></a>00050 <span class="comment">            }</span>
<a name="l00051"></a>00051 <span class="comment">            else</span>
<a name="l00052"></a>00052 <span class="comment">            {</span>
<a name="l00053"></a>00053 <span class="comment">                int err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00054"></a>00054 <span class="comment">                RCF_TRACE("timedConnect - error")(fd)(timeout.tv_sec)(timeout.tv_usec)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00055"></a>00055 <span class="comment">                return -1;</span>
<a name="l00056"></a>00056 <span class="comment">            }</span>
<a name="l00057"></a>00057 <span class="comment">        }</span>
<a name="l00058"></a>00058 <span class="comment">        else if (ret == 0)</span>
<a name="l00059"></a>00059 <span class="comment">        {</span>
<a name="l00060"></a>00060 <span class="comment">            return 0;</span>
<a name="l00061"></a>00061 <span class="comment">        }</span>
<a name="l00062"></a>00062 <span class="comment">        else</span>
<a name="l00063"></a>00063 <span class="comment">        {</span>
<a name="l00064"></a>00064 <span class="comment">            int err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00065"></a>00065 <span class="comment">            RCF_TRACE("timedConnect - error")(fd)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00066"></a>00066 <span class="comment">            return -1;</span>
<a name="l00067"></a>00067 <span class="comment">        }</span>
<a name="l00068"></a>00068 <span class="comment"></span>
<a name="l00069"></a>00069 <span class="comment">    }*/</span>
<a name="l00070"></a>00070 
<a name="l00071"></a>00071     <span class="comment">// returns -2 for timeout, -1 for error, otherwise number of bytes sent (&gt; 0)</span>
<a name="l00072"></a>00072     <span class="keywordtype">int</span> timedSend(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> timeoutMs, <span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, std::size_t length, <span class="keywordtype">int</span> flags);
<a name="l00073"></a>00073     <span class="comment">/*</span>
<a name="l00074"></a>00074 <span class="comment">    {</span>
<a name="l00075"></a>00075 <span class="comment">        unsigned int startTimeMs = getCurrentTimeMs();</span>
<a name="l00076"></a>00076 <span class="comment">        unsigned int endTimeMs = startTimeMs + timeoutMs;</span>
<a name="l00077"></a>00077 <span class="comment">        int ret = 0;</span>
<a name="l00078"></a>00078 <span class="comment">        int err = 0;</span>
<a name="l00079"></a>00079 <span class="comment">        while (true)</span>
<a name="l00080"></a>00080 <span class="comment">        {</span>
<a name="l00081"></a>00081 <span class="comment">            ret = Platform::OS::BsdSockets::send(fd, buffer, static_cast&lt;int&gt;(length), flags);</span>
<a name="l00082"></a>00082 <span class="comment">            err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00083"></a>00083 <span class="comment"></span>
<a name="l00084"></a>00084 <span class="comment">            RCF_ASSERT(ret != 0);</span>
<a name="l00085"></a>00085 <span class="comment">            if (ret &gt; 0)</span>
<a name="l00086"></a>00086 <span class="comment">            {</span>
<a name="l00087"></a>00087 <span class="comment">                return ret;</span>
<a name="l00088"></a>00088 <span class="comment">            }</span>
<a name="l00089"></a>00089 <span class="comment">            else if (</span>
<a name="l00090"></a>00090 <span class="comment">                ret == -1 &amp;&amp; </span>
<a name="l00091"></a>00091 <span class="comment">                err == Platform::OS::BsdSockets::ERR_EWOULDBLOCK)</span>
<a name="l00092"></a>00092 <span class="comment">            {</span>
<a name="l00093"></a>00093 <span class="comment">                unsigned int timeoutMs = generateTimeoutMs(endTimeMs);</span>
<a name="l00094"></a>00094 <span class="comment">                fd_set fdSet;</span>
<a name="l00095"></a>00095 <span class="comment">                FD_ZERO(&amp;fdSet);</span>
<a name="l00096"></a>00096 <span class="comment">                FD_SET(fd, &amp;fdSet);</span>
<a name="l00097"></a>00097 <span class="comment">                timeval timeout;</span>
<a name="l00098"></a>00098 <span class="comment">                timeout.tv_sec = timeoutMs/1000;</span>
<a name="l00099"></a>00099 <span class="comment">                timeout.tv_usec = 1000*(timeoutMs%1000);</span>
<a name="l00100"></a>00100 <span class="comment">                ret = Platform::OS::BsdSockets::select(fd+1, NULL, &amp;fdSet, NULL, &amp;timeout);</span>
<a name="l00101"></a>00101 <span class="comment">                RCF_ASSERT(ret == -1 || ret == 0 || ret == 1)(ret);</span>
<a name="l00102"></a>00102 <span class="comment">                if (ret == 1)</span>
<a name="l00103"></a>00103 <span class="comment">                {</span>
<a name="l00104"></a>00104 <span class="comment">                    continue;</span>
<a name="l00105"></a>00105 <span class="comment">                }</span>
<a name="l00106"></a>00106 <span class="comment">                else if (ret == 0)</span>
<a name="l00107"></a>00107 <span class="comment">                {</span>
<a name="l00108"></a>00108 <span class="comment">                    RCF_TRACE("timedSend - select() timeout")(fd)(timeout.tv_sec)(timeout.tv_usec);</span>
<a name="l00109"></a>00109 <span class="comment">                    return -2;</span>
<a name="l00110"></a>00110 <span class="comment">                }</span>
<a name="l00111"></a>00111 <span class="comment">                else if (ret == -1)</span>
<a name="l00112"></a>00112 <span class="comment">                {</span>
<a name="l00113"></a>00113 <span class="comment">                    err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00114"></a>00114 <span class="comment">                    RCF_TRACE("timedSend - select() error")(fd)(timeout.tv_sec)(timeout.tv_usec)(ret)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00115"></a>00115 <span class="comment">                    return -1;</span>
<a name="l00116"></a>00116 <span class="comment">                }</span>
<a name="l00117"></a>00117 <span class="comment">            }</span>
<a name="l00118"></a>00118 <span class="comment">            else</span>
<a name="l00119"></a>00119 <span class="comment">            {</span>
<a name="l00120"></a>00120 <span class="comment">                RCF_ASSERT(ret == -1);</span>
<a name="l00121"></a>00121 <span class="comment">                RCF_TRACE("timedSend - send() error")(fd)(ret)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00122"></a>00122 <span class="comment">                return -1;</span>
<a name="l00123"></a>00123 <span class="comment">            }</span>
<a name="l00124"></a>00124 <span class="comment">        }</span>
<a name="l00125"></a>00125 <span class="comment">    }*/</span>
<a name="l00126"></a>00126 
<a name="l00127"></a>00127     <span class="comment">// returns -2 for timeout, -1 for error, 0 for peer closure, otherwise size of packet read</span>
<a name="l00128"></a>00128     <span class="keywordtype">int</span> timedRecv(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> timeoutMs, <span class="keywordtype">int</span> fd, <span class="keywordtype">char</span> *buffer, std::size_t bufferLen, <span class="keywordtype">int</span> flags);
<a name="l00129"></a>00129     <span class="comment">/*</span>
<a name="l00130"></a>00130 <span class="comment">    {</span>
<a name="l00131"></a>00131 <span class="comment">        unsigned int startTimeMs = getCurrentTimeMs();</span>
<a name="l00132"></a>00132 <span class="comment">        unsigned int endTimeMs = startTimeMs + timeoutMs;</span>
<a name="l00133"></a>00133 <span class="comment">        int ret = 0;</span>
<a name="l00134"></a>00134 <span class="comment">        int err = 0;</span>
<a name="l00135"></a>00135 <span class="comment"></span>
<a name="l00136"></a>00136 <span class="comment">        while (true)</span>
<a name="l00137"></a>00137 <span class="comment">        {</span>
<a name="l00138"></a>00138 <span class="comment">            ret = Platform::OS::BsdSockets::recv(fd, buffer, static_cast&lt;int&gt;(bufferLen), flags);</span>
<a name="l00139"></a>00139 <span class="comment">            err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00140"></a>00140 <span class="comment">            if (ret &gt;= 0)</span>
<a name="l00141"></a>00141 <span class="comment">            {</span>
<a name="l00142"></a>00142 <span class="comment">                return ret;</span>
<a name="l00143"></a>00143 <span class="comment">            }</span>
<a name="l00144"></a>00144 <span class="comment">            else if (</span>
<a name="l00145"></a>00145 <span class="comment">                ret == -1 &amp;&amp; </span>
<a name="l00146"></a>00146 <span class="comment">                err == Platform::OS::BsdSockets::ERR_EWOULDBLOCK)</span>
<a name="l00147"></a>00147 <span class="comment">            {</span>
<a name="l00148"></a>00148 <span class="comment">                unsigned int timeoutMs = generateTimeoutMs(endTimeMs);</span>
<a name="l00149"></a>00149 <span class="comment">                fd_set fdSet;</span>
<a name="l00150"></a>00150 <span class="comment">                FD_ZERO(&amp;fdSet);</span>
<a name="l00151"></a>00151 <span class="comment">                FD_SET(fd, &amp;fdSet);</span>
<a name="l00152"></a>00152 <span class="comment">                timeval timeout;</span>
<a name="l00153"></a>00153 <span class="comment">                timeout.tv_sec = timeoutMs/1000;</span>
<a name="l00154"></a>00154 <span class="comment">                timeout.tv_usec = 1000*(timeoutMs%1000);</span>
<a name="l00155"></a>00155 <span class="comment">                ret = Platform::OS::BsdSockets::select(fd+1, &amp;fdSet, NULL, NULL, &amp;timeout);</span>
<a name="l00156"></a>00156 <span class="comment">                RCF_ASSERT(ret == -1 || ret == 0 || ret == 1)(ret);</span>
<a name="l00157"></a>00157 <span class="comment">                if (ret == 1)</span>
<a name="l00158"></a>00158 <span class="comment">                {</span>
<a name="l00159"></a>00159 <span class="comment">                    continue;</span>
<a name="l00160"></a>00160 <span class="comment">                }</span>
<a name="l00161"></a>00161 <span class="comment">                else if (ret == 0)</span>
<a name="l00162"></a>00162 <span class="comment">                {</span>
<a name="l00163"></a>00163 <span class="comment">                    RCF_TRACE("timedRecv - select() timeout")(fd)(timeout.tv_sec)(timeout.tv_usec);</span>
<a name="l00164"></a>00164 <span class="comment">                    return -2;</span>
<a name="l00165"></a>00165 <span class="comment">                }</span>
<a name="l00166"></a>00166 <span class="comment">                else if (ret == -1)</span>
<a name="l00167"></a>00167 <span class="comment">                {</span>
<a name="l00168"></a>00168 <span class="comment">                    err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00169"></a>00169 <span class="comment">                    RCF_TRACE("timedRecv - select() error")(fd)(timeout.tv_sec)(timeout.tv_usec)(ret)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00170"></a>00170 <span class="comment">                    return -1;</span>
<a name="l00171"></a>00171 <span class="comment">                }</span>
<a name="l00172"></a>00172 <span class="comment">            }</span>
<a name="l00173"></a>00173 <span class="comment">            else if (ret == -1)</span>
<a name="l00174"></a>00174 <span class="comment">            {</span>
<a name="l00175"></a>00175 <span class="comment">                err = Platform::OS::BsdSockets::GetLastError();</span>
<a name="l00176"></a>00176 <span class="comment">                RCF_TRACE("timedRecv - recv() error")(fd)(ret)(err)(Platform::OS::GetErrorString(err));</span>
<a name="l00177"></a>00177 <span class="comment">                return -1;</span>
<a name="l00178"></a>00178 <span class="comment">            }</span>
<a name="l00179"></a>00179 <span class="comment">        }</span>
<a name="l00180"></a>00180 <span class="comment">    }*/</span>
<a name="l00181"></a>00181 
<a name="l00182"></a>00182 } <span class="comment">// namespace RCF</span>
<a name="l00183"></a>00183 
<a name="l00184"></a>00184 
<a name="l00185"></a>00185 <span class="preprocessor">#endif // ! INCLUDE_RCF_TIMEDBSDSOCKETS_HPP</span>
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Written By
Jarl Lindrud
Australia Australia
Software developer, from Sweden and now living in Canberra, Australia, working on distributed C++ applications. When he is not programming, Jarl enjoys skiing and playing table tennis. He derives immense satisfaction from referring to himself in third person.

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Posted 23 Dec 2005

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