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<h1>pointer.h</h1><a href="pointer_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (C) 2001 Open Source Telecom Corporation.</span>
<a name="l00002"></a>00002 <span class="comment">// </span>
<a name="l00003"></a>00003 <span class="comment">// This program is free software; you can redistribute it and/or modify</span>
<a name="l00004"></a>00004 <span class="comment">// it under the terms of the GNU General Public License as published by</span>
<a name="l00005"></a>00005 <span class="comment">// the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00006"></a>00006 <span class="comment">// (at your option) any later version.</span>
<a name="l00007"></a>00007 <span class="comment">// </span>
<a name="l00008"></a>00008 <span class="comment">// This program is distributed in the hope that it will be useful,</span>
<a name="l00009"></a>00009 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00010"></a>00010 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00011"></a>00011 <span class="comment">// GNU General Public License for more details.</span>
<a name="l00012"></a>00012 <span class="comment">// </span>
<a name="l00013"></a>00013 <span class="comment">// You should have received a copy of the GNU General Public License</span>
<a name="l00014"></a>00014 <span class="comment">// along with this program; if not, write to the Free Software </span>
<a name="l00015"></a>00015 <span class="comment">// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</span>
<a name="l00016"></a>00016 <span class="comment">// </span>
<a name="l00017"></a>00017 <span class="comment">// As a special exception to the GNU General Public License, permission is </span>
<a name="l00018"></a>00018 <span class="comment">// granted for additional uses of the text contained in its release </span>
<a name="l00019"></a>00019 <span class="comment">// of Common C++.</span>
<a name="l00020"></a>00020 <span class="comment">// </span>
<a name="l00021"></a>00021 <span class="comment">// The exception is that, if you link the Common C++ library with other</span>
<a name="l00022"></a>00022 <span class="comment">// files to produce an executable, this does not by itself cause the</span>
<a name="l00023"></a>00023 <span class="comment">// resulting executable to be covered by the GNU General Public License.</span>
<a name="l00024"></a>00024 <span class="comment">// Your use of that executable is in no way restricted on account of</span>
<a name="l00025"></a>00025 <span class="comment">// linking the Common C++ library code into it.</span>
<a name="l00026"></a>00026 <span class="comment">// </span>
<a name="l00027"></a>00027 <span class="comment">// This exception does not however invalidate any other reasons why</span>
<a name="l00028"></a>00028 <span class="comment">// the executable file might be covered by the GNU General Public License.</span>
<a name="l00029"></a>00029 <span class="comment">// </span>
<a name="l00030"></a>00030 <span class="comment">// This exception applies only to the code released under the </span>
<a name="l00031"></a>00031 <span class="comment">// name Common C++. If you copy code from other releases into a copy of</span>
<a name="l00032"></a>00032 <span class="comment">// Common C++, as the General Public License permits, the exception does</span>
<a name="l00033"></a>00033 <span class="comment">// not apply to the code that you add in this way. To avoid misleading</span>
<a name="l00034"></a>00034 <span class="comment">// anyone as to the status of such modified files, you must delete</span>
<a name="l00035"></a>00035 <span class="comment">// this exception notice from them.</span>
<a name="l00036"></a>00036 <span class="comment">// </span>
<a name="l00037"></a>00037 <span class="comment">// If you write modifications of your own for Common C++, it is your choice</span>
<a name="l00038"></a>00038 <span class="comment">// whether to permit this exception to apply to your modifications.</span>
<a name="l00039"></a>00039 <span class="comment">// If you do not wish that, delete this exception notice. </span>
<a name="l00040"></a>00040
<a name="l00046"></a>00046 <span class="keyword">namespace </span>ost {
<a name="l00047"></a>00047
<a name="l00054"></a>00054 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00055"></a><a class="code" href="classost_1_1_pointer.html">00055</a> <span class="keyword">class </span><a class="code" href="classost_1_1_pointer.html">Pointer</a>
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 <span class="keyword">protected</span>:
<a name="l00058"></a><a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">00058</a> <span class="keywordtype">unsigned</span> *<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a>;
<a name="l00059"></a><a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">00059</a> T *<a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;
<a name="l00060"></a>00060
<a name="l00061"></a><a class="code" href="classost_1_1_pointer.html#27a29012c633652dee8ebfbc27df8aa7">00061</a> <span class="keywordtype">void</span> <a class="code" href="classost_1_1_pointer.html#27a29012c633652dee8ebfbc27df8aa7">ptrDetach</a>(<span class="keywordtype">void</span>)
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 <span class="keywordflow">if</span>(<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> && --(*<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a>)==0)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keyword">delete</span> <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;
<a name="l00066"></a>00066 <span class="keyword">delete</span> <a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a>;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a> = NULL;
<a name="l00069"></a>00069 <a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> = NULL;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keyword">public</span>:
<a name="l00073"></a><a class="code" href="classost_1_1_pointer.html#e093c3223ff4390d096db0c676004f6f">00073</a> <span class="keyword">explicit</span> <a class="code" href="classost_1_1_pointer.html#e093c3223ff4390d096db0c676004f6f">Pointer</a>(T* ptr = NULL) : <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>(ptr)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> = <span class="keyword">new</span> unsigned;
<a name="l00076"></a>00076 *<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> = 1;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00079"></a><a class="code" href="classost_1_1_pointer.html#eb824e73e9cf8f8fa9b3daa4be4ee8b5">00079</a> <a class="code" href="classost_1_1_pointer.html#e093c3223ff4390d096db0c676004f6f">Pointer</a>(<span class="keyword">const</span> <a class="code" href="classost_1_1_pointer.html">Pointer<T></a> &ref)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a> = ref.<a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;
<a name="l00082"></a>00082 <a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> = ref.<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a>;
<a name="l00083"></a>00083 ++(*ptrCount);
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a><a class="code" href="classost_1_1_pointer.html#706723912bcdef6fdfc19f00ba466106">00086</a> <span class="keyword">inline</span> <span class="keyword">virtual</span> <a class="code" href="classost_1_1_pointer.html#706723912bcdef6fdfc19f00ba466106">~Pointer</a>()
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <a class="code" href="classost_1_1_pointer.html#27a29012c633652dee8ebfbc27df8aa7">ptrDetach</a>();
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00092"></a><a class="code" href="classost_1_1_pointer.html#796627a6cc2c361b8786a13b1e4f050e">00092</a> <a class="code" href="classost_1_1_pointer.html">Pointer</a>& <a class="code" href="classost_1_1_pointer.html#796627a6cc2c361b8786a13b1e4f050e">operator=</a>(<span class="keyword">const</span> <a class="code" href="classost_1_1_pointer.html">Pointer<T></a> &ref)
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <span class="keywordflow">if</span>(<span class="keyword">this</span> != &ref)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <a class="code" href="classost_1_1_pointer.html#27a29012c633652dee8ebfbc27df8aa7">ptrDetach</a>();
<a name="l00097"></a>00097 <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a> = ref.<a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;
<a name="l00098"></a>00098 <a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> = ref.<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a>;
<a name="l00099"></a>00099 ++(*ptrCount);
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a><a class="code" href="classost_1_1_pointer.html#4bc62033c8a3f0f35a5403b3eee88b13">00104</a> <span class="keyword">inline</span> T& <a class="code" href="classost_1_1_pointer.html#4bc62033c8a3f0f35a5403b3eee88b13">operator*</a>()<span class="keyword"> const</span>
<a name="l00105"></a>00105 <span class="keyword"> </span>{<span class="keywordflow">return</span> *<a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;};
<a name="l00106"></a>00106
<a name="l00107"></a><a class="code" href="classost_1_1_pointer.html#575b2dceae74af65eaeedd07caddb141">00107</a> <span class="keyword">inline</span> T* <a class="code" href="classost_1_1_pointer.html#575b2dceae74af65eaeedd07caddb141">getObject</a>()<span class="keyword"> const</span>
<a name="l00108"></a>00108 <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;};
<a name="l00109"></a>00109
<a name="l00110"></a><a class="code" href="classost_1_1_pointer.html#5c9f6c308391da82f57d7eec2435c0a0">00110</a> <span class="keyword">inline</span> T* <a class="code" href="classost_1_1_pointer.html#5c9f6c308391da82f57d7eec2435c0a0">operator-></a>()<span class="keyword"> const</span>
<a name="l00111"></a>00111 <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="classost_1_1_pointer.html#7f900a96c12cf1ba6473e426fbad9e4e">ptrObject</a>;};
<a name="l00112"></a>00112
<a name="l00113"></a><a class="code" href="classost_1_1_pointer.html#275cb03942d3cf6f5df46b7200555d9a">00113</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classost_1_1_pointer.html#275cb03942d3cf6f5df46b7200555d9a">operator!</a>()<span class="keyword"> const</span>
<a name="l00114"></a>00114 <span class="keyword"> </span>{<span class="keywordflow">return</span> (*<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> == 1);};
<a name="l00115"></a>00115
<a name="l00116"></a><a class="code" href="classost_1_1_pointer.html#062cf7a878bcec3583adcab966a383c8">00116</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classost_1_1_pointer.html#062cf7a878bcec3583adcab966a383c8">operator++</a>()<span class="keyword"> const</span>
<a name="l00117"></a>00117 <span class="keyword"> </span>{<span class="keywordflow">return</span> ++(*ptrCount);};
<a name="l00118"></a>00118
<a name="l00119"></a><a class="code" href="classost_1_1_pointer.html#cddcdf411d03dfca747f1bfdef970255">00119</a> <span class="keywordtype">int</span> <a class="code" href="classost_1_1_pointer.html#cddcdf411d03dfca747f1bfdef970255">operator--</a>()<span class="keyword"> const</span>
<a name="l00120"></a>00120 <span class="keyword"> </span>{
<a name="l00121"></a>00121 <span class="keywordflow">if</span>(*<a class="code" href="classost_1_1_pointer.html#e09e4e15718c8e4ae77a35205e5fe1c5">ptrCount</a> == 1)
<a name="l00122"></a>00122 {
<a name="l00123"></a>00123 <span class="keyword">delete</span> <span class="keyword">this</span>;
<a name="l00124"></a>00124 <span class="keywordflow">return</span> 0;
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 <span class="keywordflow">return</span> --(*ptrCount);
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128 };
<a name="l00129"></a>00129
<a name="l00130"></a>00130 }
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Jun 19 10:50:55 2006 for GNU CommonC++ by
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