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| <a name="boost.interprocess.intrusive_ptr"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Class template intrusive_ptr</span></h2> |
| <p>boost::interprocess::intrusive_ptr</p> |
| </div> |
| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../boost_interprocess_reference.html#header.boost.interprocess.smart_ptr.intrusive_ptr_hpp" title="Header <boost/interprocess/smart_ptr/intrusive_ptr.hpp>">boost/interprocess/smart_ptr/intrusive_ptr.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VoidPointer<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">pointer_to_other</span><span class="special"><</span> <span class="identifier">VoidPointer</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <a name="boost.interprocess.intrusive_ptr.pointer"></a><span class="identifier">pointer</span><span class="special">;</span> <span class="comment">// Provides the type of the internal stored pointer. </span> |
| <span class="keyword">typedef</span> <span class="identifier">T</span> <a name="boost.interprocess.intrusive_ptr.element_type"></a><span class="identifier">element_type</span><span class="special">;</span> <span class="comment">// Provides the type of the stored pointer. </span> |
| |
| <span class="comment">// <a class="link" href="intrusive_ptr.html#boost.interprocess.intrusive_ptrconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="intrusive_ptr.html#id824030-bb"><span class="identifier">intrusive_ptr</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="intrusive_ptr.html#id824036-bb"><span class="identifier">intrusive_ptr</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="intrusive_ptr.html#id824056-bb"><span class="identifier">intrusive_ptr</span></a><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> <a class="link" href="intrusive_ptr.html#id824071-bb"><span class="identifier">intrusive_ptr</span></a><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a><span class="special"><</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| intrusive_ptr& <a class="link" href="intrusive_ptr.html#id824099-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> |
| intrusive_ptr& <a class="link" href="intrusive_ptr.html#id824113-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a><span class="special"><</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| intrusive_ptr& <a class="link" href="intrusive_ptr.html#id824134-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="identifier">pointer</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="intrusive_ptr.html#id824093-bb"><span class="special">~</span><span class="identifier">intrusive_ptr</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="intrusive_ptr.html#id823925-bb">public member functions</a></span> |
| <span class="identifier">pointer</span> <span class="special">&</span> <a class="link" href="intrusive_ptr.html#id823928-bb"><span class="identifier">get</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span> <a class="link" href="intrusive_ptr.html#id823940-bb"><span class="identifier">get</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">T</span> <span class="special">&</span> <a class="link" href="intrusive_ptr.html#id823952-bb"><span class="keyword">operator</span><span class="special">*</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span> <a class="link" href="intrusive_ptr.html#id823964-bb"><span class="keyword">operator</span><span class="special">-></span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">pointer</span> <span class="special">&</span> <a class="link" href="intrusive_ptr.html#id823975-bb"><span class="keyword">operator</span><span class="special">-></span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="intrusive_ptr.html#id823986-bb"><span class="keyword">operator</span> <span class="identifier">unspecified_bool_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">bool</span> <a class="link" href="intrusive_ptr.html#id823999-bb"><span class="keyword">operator</span><span class="special">!</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">void</span> <a class="link" href="intrusive_ptr.html#id824010-bb"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id1503954"></a><h2>Description</h2> |
| <p>The intrusive_ptr class template stores a pointer to an object with an embedded reference count. intrusive_ptr is parameterized on T (the type of the object pointed to) and VoidPointer(a void pointer type that defines the type of pointer that intrusive_ptr will store). intrusive_ptr<T, void *> defines a class with a T* member whereas intrusive_ptr<T, offset_ptr<void> > defines a class with a offset_ptr<T> member. Relies on unqualified calls to:</p> |
| <p>void intrusive_ptr_add_ref(T * p); void intrusive_ptr_release(T * p);</p> |
| <p>with (p != 0)</p> |
| <p>The object is responsible for destroying itself. </p> |
| <div class="refsect2"> |
| <a name="id1503969"></a><h3> |
| <a name="boost.interprocess.intrusive_ptrconstruct-copy-destruct"></a><code class="computeroutput">intrusive_ptr</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id824030-bb"></a><span class="identifier">intrusive_ptr</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructor. Initializes internal pointer to 0. Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id824036-bb"></a><span class="identifier">intrusive_ptr</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span> p<span class="special">,</span> <span class="keyword">bool</span> add_ref <span class="special">=</span> <span class="keyword">true</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructor. Copies pointer and if "p" is not zero and "add_ref" is true calls intrusive_ptr_add_ref(get_pointer(p)). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id824056-bb"></a><span class="identifier">intrusive_ptr</span><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="keyword">const</span> <span class="special">&</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Copy constructor. Copies the internal pointer and if "p" is not zero calls intrusive_ptr_add_ref(get_pointer(p)). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> <a name="id824071-bb"></a><span class="identifier">intrusive_ptr</span><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a><span class="special"><</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructor from related. Copies the internal pointer and if "p" is not zero calls intrusive_ptr_add_ref(get_pointer(p)). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout">intrusive_ptr& <a name="id824099-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="keyword">const</span> <span class="special">&</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Assignment operator. Equivalent to intrusive_ptr(r).swap(*this). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> |
| intrusive_ptr& <a name="id824113-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a><span class="special"><</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Assignment from related. Equivalent to intrusive_ptr(r).swap(*this). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout">intrusive_ptr& <a name="id824134-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">pointer</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Assignment from pointer. Equivalent to intrusive_ptr(r).swap(*this). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id824093-bb"></a><span class="special">~</span><span class="identifier">intrusive_ptr</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Destructor. If internal pointer is not 0, calls intrusive_ptr_release(get_pointer(m_ptr)). Does not throw </p> |
| </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id1504487"></a><h3> |
| <a name="id823925-bb"></a><code class="computeroutput">intrusive_ptr</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">pointer</span> <span class="special">&</span> <a name="id823928-bb"></a><span class="identifier">get</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Returns a reference to the internal pointer. Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span> <a name="id823940-bb"></a><span class="identifier">get</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Returns a reference to the internal pointer. Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">T</span> <span class="special">&</span> <a name="id823952-bb"></a><span class="keyword">operator</span><span class="special">*</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Returns *get(). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&</span> <a name="id823964-bb"></a><span class="keyword">operator</span><span class="special">-></span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Returns *get(). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">pointer</span> <span class="special">&</span> <a name="id823975-bb"></a><span class="keyword">operator</span><span class="special">-></span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Returns get(). Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id823986-bb"></a><span class="keyword">operator</span> <span class="identifier">unspecified_bool_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Conversion to boolean. Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">bool</span> <a name="id823999-bb"></a><span class="keyword">operator</span><span class="special">!</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Not operator. Does not throw </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id824010-bb"></a><span class="identifier">swap</span><span class="special">(</span><a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> <span class="special">&</span> rhs<span class="special">)</span><span class="special">;</span></pre> |
| <p>Exchanges the contents of the two smart pointers. Does not throw </p> |
| </li> |
| </ol></div> |
| </div> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2005 - 2010 Ion Gaztanaga<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
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