File: intrusive_ptr.html

package info (click to toggle)
boost1.55 1.55.0%2Bdfsg-3
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 487,824 kB
  • ctags: 673,349
  • sloc: cpp: 2,098,430; xml: 106,036; ansic: 46,744; python: 32,427; sh: 11,864; cs: 2,121; asm: 1,640; makefile: 984; perl: 714; yacc: 456; php: 132; fortran: 43; sql: 13; csh: 6
file content (158 lines) | stat: -rw-r--r-- 19,426 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Class template intrusive_ptr</title>
<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../../interprocess/indexes_reference.html#header.boost.interprocess.interprocess_fwd_hpp" title="Header &lt;boost/interprocess/interprocess_fwd.hpp&gt;">
<link rel="prev" href="scoped_ptr.html" title="Class template scoped_ptr">
<link rel="next" href="shared_ptr.html" title="Class template shared_ptr">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td>
<td align="center"><a href="../../../../index.html">Home</a></td>
<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="scoped_ptr.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../interprocess/indexes_reference.html#header.boost.interprocess.interprocess_fwd_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="shared_ptr.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="refentry">
<a name="boost.interprocess.intrusive_ptr"></a><div class="titlepage"></div>
<div class="refnamediv">
<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: &lt;<a class="link" href="../../interprocess/indexes_reference.html#header.boost.interprocess.interprocess_fwd_hpp" title="Header &lt;boost/interprocess/interprocess_fwd.hpp&gt;">boost/interprocess/interprocess_fwd.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VoidPointer<span class="special">&gt;</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">// <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#idp28103096-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#idp28103416-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">&amp;</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#idp28104632-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">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span> <a class="link" href="intrusive_ptr.html#idp28105512-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">&lt;</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  intrusive_ptr&amp; <a class="link" href="intrusive_ptr.html#idp28107192-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">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span> 
    intrusive_ptr&amp; <a class="link" href="intrusive_ptr.html#idp28108152-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">&lt;</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  intrusive_ptr&amp; <a class="link" href="intrusive_ptr.html#idp28109544-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#idp28106824-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#idp28096744-bb">public member functions</a></span>
  <span class="identifier">pointer</span> <span class="special">&amp;</span> <a class="link" href="intrusive_ptr.html#idp28096952-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">&amp;</span> <a class="link" href="intrusive_ptr.html#idp28097672-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">&amp;</span> <a class="link" href="intrusive_ptr.html#idp28098392-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">&amp;</span> <a class="link" href="intrusive_ptr.html#idp28099080-bb"><span class="keyword">operator</span><span class="special">-&gt;</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">&amp;</span> <a class="link" href="intrusive_ptr.html#idp28099768-bb"><span class="keyword">operator</span><span class="special">-&gt;</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="intrusive_ptr.html#idp28100456-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#idp28101192-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#idp28101880-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">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp116001240"></a><h2>Description</h2>
<p>The <a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> class template stores a pointer to an object with an embedded reference count. <a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> is parameterized on T (the type of the object pointed to) and VoidPointer(a void pointer type that defines the type of pointer that <a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a> will store). intrusive_ptr&lt;T, void *&gt; defines a class with a T* member whereas <a class="link" href="intrusive_ptr.html" title="Class template intrusive_ptr">intrusive_ptr</a>&lt;T, offset_ptr&lt;void&gt; &gt; defines a class with a offset_ptr&lt;T&gt; 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="idp116004648"></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="idp28103096-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="idp28103416-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">&amp;</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(to_raw_pointer(p)). Does not throw </p>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idp28104632-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">&amp;</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(to_raw_pointer(p)). Does not throw </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span> <a name="idp28105512-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">&lt;</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</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(to_raw_pointer(p)). Does not throw </p>
</li>
<li class="listitem">
<pre class="literallayout">intrusive_ptr&amp; <a name="idp28107192-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">&amp;</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">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span> 
  intrusive_ptr&amp; <a name="idp28108152-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">&lt;</span> <span class="identifier">U</span><span class="special">,</span> <span class="identifier">VP</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</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&amp; <a name="idp28109544-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="idp28106824-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(to_raw_pointer(m_ptr)). Does not throw </p>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idp116035512"></a><h3>
<a name="idp28096744-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">&amp;</span> <a name="idp28096952-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">&amp;</span> <a name="idp28097672-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">&amp;</span> <a name="idp28098392-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">&amp;</span> <a name="idp28099080-bb"></a><span class="keyword">operator</span><span class="special">-&gt;</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">&amp;</span> <a name="idp28099768-bb"></a><span class="keyword">operator</span><span class="special">-&gt;</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="idp28100456-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="idp28101192-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="idp28101880-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">&amp;</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>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2005-2012 Ion Gaztanaga<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="scoped_ptr.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../interprocess/indexes_reference.html#header.boost.interprocess.interprocess_fwd_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="shared_ptr.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>