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<h1>csutil/weakreferenced.h</h1><a href="weakreferenced_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> Crystal Space Weak Reference Counting Implementation</span>
<a name="l00003"></a>00003 <span class="comment"> Copyright (C) 2006 by Jorrit Tyberghein</span>
<a name="l00004"></a>00004 <span class="comment"> (C) 2006 by Amir Taaki</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> modify it under the terms of the GNU Library General Public</span>
<a name="l00008"></a>00008 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> Library General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU Library General Public</span>
<a name="l00017"></a>00017 <span class="comment"> License along with this library; if not, write to the Free</span>
<a name="l00018"></a>00018 <span class="comment"> Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</span>
<a name="l00019"></a>00019 <span class="comment">*/</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef __CS_CSUTIL_WEAKREFERENCED_H__</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __CS_CSUTIL_WEAKREFERENCED_H__</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="csutil_2array_8h.html" title="Generic Array Template.">array.h</a>"</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keyword">namespace </span>CS
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 <span class="keyword">namespace </span>Utility
<a name="l00033"></a>00033 {
<a name="l00034"></a>00034
<a name="l00042"></a><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html">00042</a> <span class="keyword">class </span><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html" title="This is a class which provides basic weak reference-counting semantics.">WeakReferenced</a>
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keyword">public</span>:
<a name="l00045"></a><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#1080f565d43eba9ffd4f2d96bf3e0224">00045</a> <a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#1080f565d43eba9ffd4f2d96bf3e0224">WeakReferenced</a> () : weakref_owners (0) {}
<a name="l00046"></a><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#9c59e9232411167da21655aec5c5a959">00046</a> <a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#9c59e9232411167da21655aec5c5a959">~WeakReferenced</a> ()
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 <span class="keywordflow">if</span> (weakref_owners)
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < weakref_owners-><a class="code" href="classcsArray.html#d9707ffab9a7c3f30f76189f6a1ac7c2" title="Return the number of elements in the array.">GetSize</a>(); i++)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 *((*weakref_owners)[i]) = 0;
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054 <span class="keyword">delete</span> weakref_owners;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057
<a name="l00058"></a><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#653acb880fae2eb1f470f2542772d68c">00058</a> <span class="keywordtype">void</span> <a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#653acb880fae2eb1f470f2542772d68c">AddRefOwner</a> (<span class="keywordtype">void</span>** ref_owner)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060 <span class="keywordflow">if</span> (!weakref_owners)
<a name="l00061"></a>00061 weakref_owners = <span class="keyword">new</span> <a class="code" href="classcsArray.html" title="A templated array class.">WeakRefOwnerArray</a> (0);
<a name="l00062"></a>00062 weakref_owners-><a class="code" href="classcsArray.html#be2ff9bd078ded1a2b2f4dec2b35c1fa" title="Insert an element at a sorted position, using an element comparison function.">InsertSorted</a> (ref_owner);
<a name="l00063"></a>00063 }
<a name="l00064"></a><a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#69b911275b22d521ce5cf12232299e27">00064</a> <span class="keywordtype">void</span> <a class="code" href="classCS_1_1Utility_1_1WeakReferenced.html#69b911275b22d521ce5cf12232299e27">RemoveRefOwner</a> (<span class="keywordtype">void</span>** ref_owner)
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (!weakref_owners)
<a name="l00067"></a>00067 <span class="keywordflow">return</span>;
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordtype">size_t</span> index = weakref_owners-><a class="code" href="classcsArray.html#eb23011335b0d46ead40440ecd53d59b" title="Find an element based on some key, using a comparison function.">FindSortedKey</a> (
<a name="l00070"></a>00070 <a class="code" href="classcsArrayCmp.html" title="A functor template which encapsulates a key and a comparison function for use with...">csArrayCmp<void**, void**></a>(ref_owner));
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (index != <a class="code" href="group__util__containers.html#g7477ed9887527029069ab5d5c79e2f70" title="This value is returned whenever an array item could not be located or does not exist...">csArrayItemNotFound</a>)
<a name="l00073"></a>00073 weakref_owners-><a class="code" href="classcsArray.html#10a2afd5172c671fb32c70b4f6e538e8" title="Delete an element from the array.">DeleteIndex</a> (index);
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keyword">private</span>:
<a name="l00077"></a>00077 <span class="keyword">typedef</span> <a class="code" href="classcsArray.html" title="A templated array class.">csArray</a><<span class="keywordtype">void</span>**,
<a name="l00078"></a>00078 <a class="code" href="classcsArrayElementHandler.html" title="The default element handler for csArray.">csArrayElementHandler<void**></a>,
<a name="l00079"></a>00079 <a class="code" href="classCS_1_1Memory_1_1AllocatorMalloc.html" title="A default memory allocator that allocates with cs_malloc().">CS::Memory::AllocatorMalloc</a>,
<a name="l00080"></a>00080 <a class="code" href="classcsArrayCapacityLinear.html" title="csArray capacity handler.">csArrayCapacityLinear<csArrayThresholdFixed<4></a> > > WeakRefOwnerArray;
<a name="l00081"></a>00081 WeakRefOwnerArray* weakref_owners;
<a name="l00082"></a>00082 };
<a name="l00083"></a>00083
<a name="l00084"></a>00084 } <span class="comment">// namespace Utility</span>
<a name="l00085"></a>00085 } <span class="comment">// namespace CS</span>
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="preprocessor">#endif // __CS_CSUTIL_WEAKREFERENCED_H__</span>
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