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<h1>SharedPtr.hpp</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* A Reference Counting Smart Pointer.</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2007-2009 David Robillard <http://drobilla.net></span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This is free software; you can redistribute it and/or modify it under the</span>
<a name="l00005"></a>00005 <span class="comment"> * terms of the GNU General Public License as published by the Free Software</span>
<a name="l00006"></a>00006 <span class="comment"> * Foundation; either version 2 of the License, or (at your option) any later</span>
<a name="l00007"></a>00007 <span class="comment"> * version.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * This file is distributed in the hope that it will be useful, but WITHOUT ANY</span>
<a name="l00010"></a>00010 <span class="comment"> * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span>
<a name="l00011"></a>00011 <span class="comment"> * FOR A PARTICULAR PURPOSE. See the GNU General Public License for 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 along</span>
<a name="l00014"></a>00014 <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span>
<a name="l00015"></a>00015 <span class="comment"> * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00016"></a>00016 <span class="comment"> */</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="preprocessor">#ifndef RAUL_SHARED_PTR_HPP</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#define RAUL_SHARED_PTR_HPP</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <cassert></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <cstddef></span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#include <iostream></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <list></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <algorithm></span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keyword">static</span> std::list<void*> shared_ptr_counters;
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">// Use debug hooks to ensure 2 shared_ptrs never point to the same thing</span>
<a name="l00032"></a>00032 <span class="keyword">namespace </span>boost {
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">inline</span> <span class="keywordtype">void</span> sp_scalar_constructor_hook(<span class="keywordtype">void</span>* <span class="keywordtype">object</span>, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> cnt, <span class="keywordtype">void</span>* ptr) {
<a name="l00035"></a>00035 assert(std::find(shared_ptr_counters.begin(), shared_ptr_counters.end(),
<a name="l00036"></a>00036 (<span class="keywordtype">void</span>*)<span class="keywordtype">object</span>) == shared_ptr_counters.end());
<a name="l00037"></a>00037 shared_ptr_counters.push_back(<span class="keywordtype">object</span>);
<a name="l00038"></a>00038 <span class="comment">//std::cerr << "Creating SharedPtr to "</span>
<a name="l00039"></a>00039 <span class="comment">// << object << ", count = " << cnt << std::endl;</span>
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">inline</span> <span class="keywordtype">void</span> sp_scalar_destructor_hook(<span class="keywordtype">void</span>* <span class="keywordtype">object</span>, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> cnt, <span class="keywordtype">void</span>* ptr) {
<a name="l00043"></a>00043 shared_ptr_counters.remove(<span class="keywordtype">object</span>);
<a name="l00044"></a>00044 <span class="comment">//std::cerr << "Destroying SharedPtr to "</span>
<a name="l00045"></a>00045 <span class="comment">// << object << ", count = " << cnt << std::endl;</span>
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049 <span class="preprocessor">#endif // BOOST_SP_ENABLE_DEBUG_HOOKS</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span>
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="preprocessor">#include <boost/shared_ptr.hpp></span>
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="preprocessor">#ifdef BOOST_AC_USE_PTHREADS</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span><span class="preprocessor">#error "Boost is using mutex locking for pointer reference counting."</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span><span class="preprocessor">#error "This is VERY slow. Please report your platform to d@drobilla.net"</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span>
<a name="l00059"></a>00059 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keywordtype">void</span> NullDeleter(T* ptr) {}
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="preprocessor">#define SharedPtr boost::shared_ptr</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor">#define PtrCast boost::dynamic_pointer_cast</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span>
<a name="l00064"></a>00064 <span class="preprocessor">#endif // RAUL_SHARED_PTR_HPP</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
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