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<h1>EventQueue.cc</h1><a href="a00098.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Package : omniEvents</span>
<a name="l00002"></a>00002 <span class="comment">// EventQueue.cc Created : 2003/12/04</span>
<a name="l00003"></a>00003 <span class="comment">// Author : Alex Tingle</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// Copyright (C) 2003 Alex Tingle.</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// This file is part of the omniEvents application.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// omniEvents is free software; you can redistribute it and/or</span>
<a name="l00010"></a>00010 <span class="comment">// modify it under the terms of the GNU Lesser General Public</span>
<a name="l00011"></a>00011 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00012"></a>00012 <span class="comment">// version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment">//</span>
<a name="l00014"></a>00014 <span class="comment">// omniEvents is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00017"></a>00017 <span class="comment">// Lesser General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019 <span class="comment">// You should have received a copy of the GNU Lesser General Public</span>
<a name="l00020"></a>00020 <span class="comment">// License along with this library; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="a00099.html">EventQueue.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <string.h></span> <span class="comment">// memset</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <assert.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor"># include "<a class="code" href="a00083.html">config.h</a>"</span>
<a name="l00030"></a>00030 <span class="preprocessor">#endif</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span>
<a name="l00032"></a>00032 <span class="preprocessor">#ifdef HAVE_OMNIORB3</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor"># include <omniORB3/CORBA.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#endif</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span>
<a name="l00036"></a>00036 <span class="preprocessor">#ifdef HAVE_OMNIORB4</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor"># include <omniORB4/CORBA.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#endif</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="keyword">namespace </span>OmniEvents {
<a name="l00041"></a>00041
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="a00049.html#a0">00043</a> <a class="code" href="a00049.html#a0">EventQueue::EventQueue</a>(<span class="keywordtype">long</span> size)
<a name="l00044"></a>00044 : _next(0),
<a name="l00045"></a>00045 _size(size+1), <span class="comment">// Always need an `empty' entry at the head of the buffer.</span>
<a name="l00046"></a>00046 _queue(new CORBA::Any*[_size]),
<a name="l00047"></a>00047 _filter(NULL)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <a class="code" href="a00116.html#a2">DB</a>(5,<span class="stringliteral">"MaxQueueLength="</span><<size)
<a name="l00050"></a>00050 assert(<a class="code" href="a00049.html#r1">_size</a>>1);
<a name="l00051"></a>00051 <span class="comment">// Explicitly clear the queue with memset, because MS VC++ doesn't like</span>
<a name="l00052"></a>00052 <span class="comment">// it as an array initializer.</span>
<a name="l00053"></a>00053 memset(<a class="code" href="a00049.html#r2">_queue</a>,0,<a class="code" href="a00049.html#r1">_size</a>*<span class="keyword">sizeof</span>(CORBA::Any*));
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00057"></a><a class="code" href="a00049.html#a1">00057</a> <a class="code" href="a00049.html#a1">EventQueue::~EventQueue</a>()
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 <span class="keywordflow">for</span>(<span class="keywordtype">long</span> i=0; i<<a class="code" href="a00049.html#r1">_size</a>; ++i)
<a name="l00060"></a>00060 <span class="keyword">delete</span> <a class="code" href="a00049.html#r2">_queue</a>[i];
<a name="l00061"></a>00061 <span class="keyword">delete</span>[] <a class="code" href="a00049.html#r2">_queue</a>;
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="comment">//</span>
<a name="l00066"></a>00066 <span class="comment">// EventQueue::Reader</span>
<a name="l00067"></a>00067 <span class="comment">//</span>
<a name="l00068"></a>00068
<a name="l00069"></a>00069
<a name="l00070"></a><a class="code" href="a00050.html#a0">00070</a> <a class="code" href="a00050.html#a0">EventQueue::Reader::Reader</a>(<a class="code" href="a00049.html">EventQueue</a>& eventQueue)
<a name="l00071"></a>00071 : _eventQueue(eventQueue),
<a name="l00072"></a>00072 _next(eventQueue._next)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 <span class="comment">// pass</span>
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077
<a name="l00078"></a><a class="code" href="a00050.html#a1">00078</a> <span class="keywordtype">bool</span> <a class="code" href="a00050.html#a1">EventQueue::Reader::moreEvents</a>()<span class="keyword"> const</span>
<a name="l00079"></a>00079 <span class="keyword"></span>{
<a name="l00080"></a>00080 <span class="keywordflow">return</span>( <a class="code" href="a00050.html#r1">_next</a>!=<a class="code" href="a00050.html#r0">_eventQueue</a>.<a class="code" href="a00049.html#r0">_next</a> );
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083
<a name="l00084"></a><a class="code" href="a00050.html#a2">00084</a> CORBA::Any* <a class="code" href="a00050.html#a2">EventQueue::Reader::nextEvent</a>()
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 CORBA::Any* result =<a class="code" href="a00050.html#r0">_eventQueue</a>.<a class="code" href="a00049.html#r2">_queue</a>[<a class="code" href="a00050.html#r1">_next</a>];
<a name="l00087"></a>00087 <a class="code" href="a00050.html#r1">_next</a>=(<a class="code" href="a00050.html#r1">_next</a>+1)%<a class="code" href="a00050.html#r0">_eventQueue</a>.<a class="code" href="a00049.html#r1">_size</a>;
<a name="l00088"></a>00088 <span class="keywordflow">return</span> result;
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00092"></a>00092 }; <span class="comment">// end namespace OmniEvents</span>
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