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4 | <title>Class stack_traits</title> | |
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25 | <div class="section"> | |
26 | <div class="titlepage"><div><div><h3 class="title"> | |
27 | <a name="context.stack.stack_traits"></a><a class="link" href="stack_traits.html" title="Class stack_traits">Class <span class="emphasis"><em>stack_traits</em></span></a> | |
28 | </h3></div></div></div> | |
29 | <p> | |
30 | <span class="emphasis"><em>stack_traits</em></span> models a <span class="emphasis"><em>stack-traits</em></span> | |
31 | providing a way to access certain properites defined by the enironment. Stack | |
32 | allocators use <span class="emphasis"><em>stack-traits</em></span> to allocate stacks. | |
33 | </p> | |
34 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">context</span><span class="special">/</span><span class="identifier">stack_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> | |
35 | ||
36 | <span class="keyword">struct</span> <span class="identifier">stack_traits</span> <span class="special">{</span> | |
37 | <span class="keyword">static</span> <span class="keyword">bool</span> <span class="identifier">is_unbounded</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> | |
38 | ||
39 | <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">page_size</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> | |
40 | ||
41 | <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">default_size</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> | |
42 | ||
43 | <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">minimum_size</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> | |
44 | ||
45 | <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">maximum_size</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> | |
46 | <span class="special">}</span> | |
47 | </pre> | |
48 | <h5> | |
49 | <a name="context.stack.stack_traits.h0"></a> | |
50 | <span><a name="context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__keyword__bool__phrase___phrase_role__identifier__is_unbounded__phrase__phrase_role__special______phrase___code_"></a></span><a class="link" href="stack_traits.html#context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__keyword__bool__phrase___phrase_role__identifier__is_unbounded__phrase__phrase_role__special______phrase___code_"><code class="computeroutput"><span class="keyword">static</span> <span class="keyword">bool</span> <span class="identifier">is_unbounded</span><span class="special">()</span></code></a> | |
51 | </h5> | |
52 | <div class="variablelist"> | |
53 | <p class="title"><b></b></p> | |
54 | <dl> | |
55 | <dt><span class="term">Returns:</span></dt> | |
56 | <dd><p> | |
57 | Returns <code class="computeroutput"><span class="keyword">true</span></code> if the environment | |
58 | defines no limit for the size of a stack. | |
59 | </p></dd> | |
60 | <dt><span class="term">Throws:</span></dt> | |
61 | <dd><p> | |
62 | Nothing. | |
63 | </p></dd> | |
64 | </dl> | |
65 | </div> | |
66 | <h5> | |
67 | <a name="context.stack.stack_traits.h1"></a> | |
68 | <span><a name="context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__page_size__phrase__phrase_role__special______phrase___code_"></a></span><a class="link" href="stack_traits.html#context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__page_size__phrase__phrase_role__special______phrase___code_"><code class="computeroutput"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">page_size</span><span class="special">()</span></code></a> | |
69 | </h5> | |
70 | <div class="variablelist"> | |
71 | <p class="title"><b></b></p> | |
72 | <dl> | |
73 | <dt><span class="term">Returns:</span></dt> | |
74 | <dd><p> | |
75 | Returns the page size in bytes. | |
76 | </p></dd> | |
77 | <dt><span class="term">Throws:</span></dt> | |
78 | <dd><p> | |
79 | Nothing. | |
80 | </p></dd> | |
81 | </dl> | |
82 | </div> | |
83 | <h5> | |
84 | <a name="context.stack.stack_traits.h2"></a> | |
85 | <span><a name="context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__default_size__phrase__phrase_role__special______phrase___code_"></a></span><a class="link" href="stack_traits.html#context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__default_size__phrase__phrase_role__special______phrase___code_"><code class="computeroutput"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">default_size</span><span class="special">()</span></code></a> | |
86 | </h5> | |
87 | <div class="variablelist"> | |
88 | <p class="title"><b></b></p> | |
89 | <dl> | |
90 | <dt><span class="term">Returns:</span></dt> | |
91 | <dd><p> | |
92 | Returns a default stack size, which may be platform specific. If the | |
93 | stack is unbounded then the present implementation returns the maximum | |
94 | of <code class="computeroutput"><span class="number">64</span> <span class="identifier">kB</span></code> | |
95 | and <code class="computeroutput"><span class="identifier">minimum_size</span><span class="special">()</span></code>. | |
96 | </p></dd> | |
97 | <dt><span class="term">Throws:</span></dt> | |
98 | <dd><p> | |
99 | Nothing. | |
100 | </p></dd> | |
101 | </dl> | |
102 | </div> | |
103 | <h5> | |
104 | <a name="context.stack.stack_traits.h3"></a> | |
105 | <span><a name="context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__minimum_size__phrase__phrase_role__special______phrase___code_"></a></span><a class="link" href="stack_traits.html#context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__minimum_size__phrase__phrase_role__special______phrase___code_"><code class="computeroutput"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">minimum_size</span><span class="special">()</span></code></a> | |
106 | </h5> | |
107 | <div class="variablelist"> | |
108 | <p class="title"><b></b></p> | |
109 | <dl> | |
110 | <dt><span class="term">Returns:</span></dt> | |
111 | <dd><p> | |
112 | Returns the minimum size in bytes of stack defined by the environment | |
113 | (Win32 4kB/Win64 8kB, defined by rlimit on POSIX). | |
114 | </p></dd> | |
115 | <dt><span class="term">Throws:</span></dt> | |
116 | <dd><p> | |
117 | Nothing. | |
118 | </p></dd> | |
119 | </dl> | |
120 | </div> | |
121 | <h5> | |
122 | <a name="context.stack.stack_traits.h4"></a> | |
123 | <span><a name="context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__maximum_size__phrase__phrase_role__special______phrase___code_"></a></span><a class="link" href="stack_traits.html#context.stack.stack_traits._code__phrase_role__keyword__static__phrase___phrase_role__identifier__std__phrase__phrase_role__special______phrase__phrase_role__identifier__size_t__phrase___phrase_role__identifier__maximum_size__phrase__phrase_role__special______phrase___code_"><code class="computeroutput"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">maximum_size</span><span class="special">()</span></code></a> | |
124 | </h5> | |
125 | <div class="variablelist"> | |
126 | <p class="title"><b></b></p> | |
127 | <dl> | |
128 | <dt><span class="term">Preconditions:</span></dt> | |
129 | <dd><p> | |
130 | <code class="computeroutput"><span class="identifier">is_unbounded</span><span class="special">()</span></code> | |
131 | returns <code class="computeroutput"><span class="keyword">false</span></code>. | |
132 | </p></dd> | |
133 | <dt><span class="term">Returns:</span></dt> | |
134 | <dd><p> | |
135 | Returns the maximum size in bytes of stack defined by the environment. | |
136 | </p></dd> | |
137 | <dt><span class="term">Throws:</span></dt> | |
138 | <dd><p> | |
139 | Nothing. | |
140 | </p></dd> | |
141 | </dl> | |
142 | </div> | |
143 | </div> | |
144 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
145 | <td align="left"></td> | |
146 | <td align="right"><div class="copyright-footer">Copyright © 2014 Oliver Kowalke<p> | |
147 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
148 | 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>) | |
149 | </p> | |
150 | </div></td> | |
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