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<h1>ReferenceCounted.hpp</h1><a href="ReferenceCounted_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*</span>
00002 <span class="comment"> * Copyright (c) 2001-2008</span>
00003 <span class="comment"> * DecisionSoft Limited. All rights reserved.</span>
00004 <span class="comment"> * Copyright (c) 2004-2008</span>
00005 <span class="comment"> * Oracle. All rights reserved.</span>
00006 <span class="comment"> *</span>
00007 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
00008 <span class="comment"> * you may not use this file except in compliance with the License.</span>
00009 <span class="comment"> * You may obtain a copy of the License at</span>
00010 <span class="comment"> *</span>
00011 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
00012 <span class="comment"> *</span>
00013 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
00014 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
00015 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
00016 <span class="comment"> * See the License for the specific language governing permissions and</span>
00017 <span class="comment"> * limitations under the License.</span>
00018 <span class="comment"> *</span>
00019 <span class="comment"> * $Id: ReferenceCounted.hpp 475 2008-01-08 18:47:44Z jpcs $</span>
00020 <span class="comment"> */</span>
00021
00022 <span class="preprocessor">#ifndef _REFERENCECOUNTED_HPP</span>
00023 <span class="preprocessor"></span><span class="preprocessor">#define _REFERENCECOUNTED_HPP</span>
00024 <span class="preprocessor"></span>
00025 <span class="preprocessor">#include &lt;xqilla/framework/XQillaExport.hpp&gt;</span>
00026 <span class="preprocessor">#include &lt;<a class="code" href="MemoryManager_8hpp.html">xercesc/framework/MemoryManager.hpp</a>&gt;</span>
00027
00028 <span class="comment">// for null RefCountPointer instances</span>
<a name="l00029"></a><a class="code" href="ReferenceCounted_8hpp.html#a0">00029</a> <span class="preprocessor">#define NULLRCP ((void *)0)</span>
00030 <span class="preprocessor"></span>
<a name="l00032"></a><a class="code" href="classReferenceCounted.html">00032</a> <span class="keyword">class </span>XQILLA_API ReferenceCounted
00033 {
00034 <span class="keyword">public</span>:
<a name="l00035"></a><a class="code" href="classReferenceCounted.html#a0">00035</a> <a class="code" href="classReferenceCounted.html#a0">ReferenceCounted</a>()
00036 : <a class="code" href="classReferenceCounted.html#p0">_ref_count</a>(0) {}
<a name="l00037"></a><a class="code" href="classReferenceCounted.html#a1">00037</a> <span class="keyword">virtual</span> <a class="code" href="classReferenceCounted.html#a1">~ReferenceCounted</a>() {}
00038
<a name="l00040"></a><a class="code" href="classReferenceCounted.html#a2">00040</a> <span class="keywordtype">void</span> <a class="code" href="classReferenceCounted.html#a2">incrementRefCount</a>()<span class="keyword"> const</span>
00041 <span class="keyword"> </span>{
00042 ++const_cast&lt;unsigned int&amp;&gt;(_ref_count);
00043 }
00044
<a name="l00046"></a><a class="code" href="classReferenceCounted.html#a3">00046</a> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classReferenceCounted.html#a3">decrementRefCount</a>()<span class="keyword"> const</span>
00047 <span class="keyword"> </span>{
00048 <span class="keywordflow">if</span>(--const_cast&lt;unsigned int&amp;&gt;(_ref_count) == 0) {
00049 <span class="keyword">delete</span> <span class="keyword">this</span>;
00050 }
00051 }
00052
00053 <span class="keyword">protected</span>:
<a name="l00054"></a><a class="code" href="classReferenceCounted.html#p0">00054</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> _ref_count; <span class="comment">// mutable</span>
00055 };
00056
<a name="l00058"></a><a class="code" href="classRefCountPointer.html">00058</a> <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt; <span class="keyword">class </span><a class="code" href="classRefCountPointer.html">RefCountPointer</a>
00059 {
00060 <span class="keyword">public</span>:
<a name="l00061"></a><a class="code" href="classRefCountPointer.html#a0">00061</a> <a class="code" href="classRefCountPointer.html">RefCountPointer</a>(T *p = 0) : _p(p)
00062 {
00063 <span class="keywordflow">if</span>(_p != 0) _p-&gt;incrementRefCount();
00064 }
00065
<a name="l00066"></a><a class="code" href="classRefCountPointer.html#a1">00066</a> <span class="keyword">template</span>&lt;<span class="keyword">class</span> T2&gt; <a class="code" href="classRefCountPointer.html">RefCountPointer</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T2&gt;</a> &amp;o) : _p((T*)(T2*)o)
00067 {
00068 <span class="keywordflow">if</span>(_p != 0) _p-&gt;incrementRefCount();
00069 }
00070
<a name="l00071"></a><a class="code" href="classRefCountPointer.html#a2">00071</a> <a class="code" href="classRefCountPointer.html">RefCountPointer</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T&gt;</a> &amp;o) : _p(o._p)
00072 {
00073 <span class="keywordflow">if</span>(_p != 0) _p-&gt;incrementRefCount();
00074 }
00075
<a name="l00076"></a><a class="code" href="classRefCountPointer.html#a3">00076</a> <a class="code" href="classRefCountPointer.html">RefCountPointer</a> &amp;operator=(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T&gt;</a> &amp;o)
00077 {
00078 <span class="keywordflow">if</span>(_p != o.<a class="code" href="classRefCountPointer.html#p0">_p</a>) {
00079 <span class="keywordflow">if</span>(_p != 0) _p-&gt;decrementRefCount();
00080 _p = o.<a class="code" href="classRefCountPointer.html#p0">_p</a>;
00081 <span class="keywordflow">if</span>(_p != 0) _p-&gt;incrementRefCount();
00082 }
00083 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00084 }
00085
<a name="l00086"></a><a class="code" href="classRefCountPointer.html#a4">00086</a> ~<a class="code" href="classRefCountPointer.html">RefCountPointer</a>()
00087 {
00088 <span class="keywordflow">if</span>(_p != 0) _p-&gt;decrementRefCount();
00089 }
00090
<a name="l00091"></a><a class="code" href="classRefCountPointer.html#a5">00091</a> T *operator-&gt;()<span class="keyword"> const</span>
00092 <span class="keyword"> </span>{
00093 <span class="keywordflow">return</span> _p;
00094 }
00095
<a name="l00096"></a><a class="code" href="classRefCountPointer.html#a6">00096</a> operator T*()<span class="keyword"> const</span>
00097 <span class="keyword"> </span>{
00098 <span class="keywordflow">return</span> _p;
00099 }
00100
<a name="l00101"></a><a class="code" href="classRefCountPointer.html#a7">00101</a> T *get()<span class="keyword"> const</span>
00102 <span class="keyword"> </span>{
00103 <span class="keywordflow">return</span> _p;
00104 }
00105
<a name="l00106"></a><a class="code" href="classRefCountPointer.html#a8">00106</a> <span class="keywordtype">bool</span> isNull()<span class="keyword"> const</span>
00107 <span class="keyword"> </span>{
00108 <span class="keywordflow">return</span> (_p == 0);
00109 }
00110
<a name="l00111"></a><a class="code" href="classRefCountPointer.html#a9">00111</a> <span class="keywordtype">bool</span> notNull()<span class="keyword"> const</span>
00112 <span class="keyword"> </span>{
00113 <span class="keywordflow">return</span> (_p != 0);
00114 }
00115
00116 <span class="keyword">protected</span>:
<a name="l00117"></a><a class="code" href="classRefCountPointer.html#p0">00117</a> T *_p;
00118 };
00119
00120 <span class="keyword">template</span>&lt;<span class="keyword">class</span> T1, <span class="keyword">class</span> T2&gt;
<a name="l00121"></a><a class="code" href="ReferenceCounted_8hpp.html#a1">00121</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="ReferenceCounted_8hpp.html#a3">operator==</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T1&gt;</a> &amp;a, <span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T2&gt;</a> &amp;b)
00122 {
00123 <span class="keywordflow">return</span> (<span class="keywordtype">void</span>*)(T1*)a == (<span class="keywordtype">void</span>*)(T2*)b;
00124 }
00125
00126 <span class="keyword">template</span>&lt;<span class="keyword">class</span> T1, <span class="keyword">class</span> T2&gt;
<a name="l00127"></a><a class="code" href="ReferenceCounted_8hpp.html#a2">00127</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="ReferenceCounted_8hpp.html#a4">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T1&gt;</a> &amp;a, <span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T2&gt;</a> &amp;b)
00128 {
00129 <span class="keywordflow">return</span> (<span class="keywordtype">void</span>*)(T1*)a != (<span class="keywordtype">void</span>*)(T2*)b;
00130 }
00131
00132 <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
<a name="l00133"></a><a class="code" href="ReferenceCounted_8hpp.html#a3">00133</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="ReferenceCounted_8hpp.html#a3">operator==</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T&gt;</a> &amp;a, <span class="keywordtype">void</span> *b)
00134 {
00135 <span class="keywordflow">return</span> (T*)a == (T*)b;
00136 }
00137
00138 <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
<a name="l00139"></a><a class="code" href="ReferenceCounted_8hpp.html#a4">00139</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="ReferenceCounted_8hpp.html#a4">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classRefCountPointer.html">RefCountPointer&lt;T&gt;</a> &amp;a, <span class="keywordtype">void</span> *b)
00140 {
00141 <span class="keywordflow">return</span> (T*)a != (T*)b;
00142 }
00143
00144 <span class="preprocessor">#endif</span>
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