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<hr><h1>EventQueue.cc</h1><a href="a00097.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// Package : omniEvents</font>
00002 <font class="comment">// EventQueue.cc Created : 2003/12/04</font>
00003 <font class="comment">// Author : Alex Tingle</font>
00004 <font class="comment">//</font>
00005 <font class="comment">// Copyright (C) 2003 Alex Tingle.</font>
00006 <font class="comment">//</font>
00007 <font class="comment">// This file is part of the omniEvents application.</font>
00008 <font class="comment">//</font>
00009 <font class="comment">// omniEvents is free software; you can redistribute it and/or</font>
00010 <font class="comment">// modify it under the terms of the GNU Lesser General Public</font>
00011 <font class="comment">// License as published by the Free Software Foundation; either</font>
00012 <font class="comment">// version 2.1 of the License, or (at your option) any later version.</font>
00013 <font class="comment">//</font>
00014 <font class="comment">// omniEvents is distributed in the hope that it will be useful,</font>
00015 <font class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00016 <font class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00017 <font class="comment">// Lesser General Public License for more details.</font>
00018 <font class="comment">//</font>
00019 <font class="comment">// You should have received a copy of the GNU Lesser General Public</font>
00020 <font class="comment">// License along with this library; if not, write to the Free Software</font>
00021 <font class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
00022 <font class="comment">//</font>
00023
00024 <font class="preprocessor">#include "<a class="code" href="a00098.html">EventQueue.h</a>"</font>
00025 <font class="preprocessor">#include <string.h></font> <font class="comment">// memset</font>
00026 <font class="preprocessor">#include <assert.h></font>
00027
00028 <font class="preprocessor">#ifdef HAVE_CONFIG_H</font>
00029 <font class="preprocessor"></font><font class="preprocessor"># include "<a class="code" href="a00082.html">config.h</a>"</font>
00030 <font class="preprocessor">#endif</font>
00031 <font class="preprocessor"></font>
00032 <font class="preprocessor">#ifdef HAVE_OMNIORB3</font>
00033 <font class="preprocessor"></font><font class="preprocessor"># include <omniORB3/CORBA.h></font>
00034 <font class="preprocessor">#endif</font>
00035 <font class="preprocessor"></font>
00036 <font class="preprocessor">#ifdef HAVE_OMNIORB4</font>
00037 <font class="preprocessor"></font><font class="preprocessor"># include <omniORB4/CORBA.h></font>
00038 <font class="preprocessor">#endif</font>
00039 <font class="preprocessor"></font>
00040 <font class="keyword">namespace </font>OmniEvents {
00041
00042
<a name="l00043"></a><a class="code" href="a00049.html#a0">00043</a> EventQueue::EventQueue(<font class="keywordtype">long</font> size)
00044 : _next(0),
00045 _size(size+1), <font class="comment">// Always need an `empty' entry at the head of the buffer.</font>
00046 _queue(new CORBA::Any*[_size]),
00047 _filter(NULL)
00048 {
00049 <a class="code" href="a00115.html#a2">DB</a>(5,<font class="stringliteral">"MaxQueueLength="</font><<size)
00050 assert(<a class="code" href="a00049.html#o1">_size</a>>1);
00051 <font class="comment">// Explicitly clear the queue with memset, because MS VC++ doesn't like</font>
00052 <font class="comment">// it as an array initializer.</font>
00053 memset(<a class="code" href="a00049.html#o2">_queue</a>,0,<a class="code" href="a00049.html#o1">_size</a>*<font class="keyword">sizeof</font>(CORBA::Any*));
00054 }
00055
00056
<a name="l00057"></a><a class="code" href="a00049.html#a1">00057</a> EventQueue::~EventQueue()
00058 {
00059 <font class="keywordflow">for</font>(<font class="keywordtype">long</font> i=0; i<<a class="code" href="a00049.html#o1">_size</a>; ++i)
00060 <font class="keyword">delete</font> <a class="code" href="a00049.html#o2">_queue</a>[i];
00061 <font class="keyword">delete</font>[] <a class="code" href="a00049.html#o2">_queue</a>;
00062 }
00063
00064
00065 <font class="comment">//</font>
00066 <font class="comment">// EventQueue::Reader</font>
00067 <font class="comment">//</font>
00068
00069
<a name="l00070"></a><a class="code" href="a00050.html#a0">00070</a> EventQueue::Reader::Reader(<a class="code" href="a00049.html">EventQueue</a>& eventQueue)
00071 : _eventQueue(eventQueue),
00072 _next(eventQueue._next)
00073 {
00074 <font class="comment">// pass</font>
00075 }
00076
00077
<a name="l00078"></a><a class="code" href="a00050.html#a1">00078</a> <font class="keywordtype">bool</font> EventQueue::Reader::moreEvents()<font class="keyword"> const</font>
00079 <font class="keyword"></font>{
00080 <font class="keywordflow">return</font>( <a class="code" href="a00050.html#o1">_next</a>!=<a class="code" href="a00050.html#o0">_eventQueue</a>.<a class="code" href="a00049.html#o0">_next</a> );
00081 }
00082
00083
<a name="l00084"></a><a class="code" href="a00050.html#a2">00084</a> CORBA::Any* EventQueue::Reader::nextEvent()
00085 {
00086 CORBA::Any* result =<a class="code" href="a00050.html#o0">_eventQueue</a>.<a class="code" href="a00049.html#o2">_queue</a>[<a class="code" href="a00050.html#o1">_next</a>];
00087 <a class="code" href="a00050.html#o1">_next</a>=(<a class="code" href="a00050.html#o1">_next</a>+1)%<a class="code" href="a00050.html#o0">_eventQueue</a>.<a class="code" href="a00049.html#o1">_size</a>;
00088 <font class="keywordflow">return</font> result;
00089 }
00090
00091
00092 }; <font class="comment">// end namespace OmniEvents</font>
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