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diff --git a/doc/html/align/tutorial.html b/doc/html/align/tutorial.html deleted file mode 100644 index 7bca4ee5f5..0000000000 --- a/doc/html/align/tutorial.html +++ /dev/null @@ -1,315 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> -<title>Tutorial</title> -<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> -<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> -<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> -<link rel="up" href="../align.html" title="Chapter 4. Boost.Align"> -<link rel="prev" href="rationale.html" title="Rationale"> -<link rel="next" href="examples.html" title="Examples"> -</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="rationale.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../align.html"><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="examples.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> -</div> -<div class="section"> -<div class="titlepage"><div><div><h2 class="title" style="clear: both"> -<a name="align.tutorial"></a><a class="link" href="tutorial.html" title="Tutorial">Tutorial</a> -</h2></div></div></div> -<div class="toc"><dl class="toc"> -<dt><span class="section"><a href="tutorial.html#align.tutorial.align">align</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.aligned_alloc">aligned_alloc and aligned_free</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.aligned_allocator">aligned_allocator</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.aligned_allocator_adaptor">aligned_allocator_adaptor</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.aligned_delete">aligned_delete</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.alignment_of">alignment_of</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.assume_aligned">assume_aligned</a></span></dt> -<dt><span class="section"><a href="tutorial.html#align.tutorial.is_aligned">is_aligned</a></span></dt> -</dl></div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.align"></a><a class="link" href="tutorial.html#align.tutorial.align" title="align">align</a> -</h3></div></div></div> -<p> - The alignment function can be used to find the first address of a given alignment - value within a given buffer of a given size. It adjusts the pointer provided, - returns that value, and decreases space by the amount advanced, if the alignment - succeeds, provided sufficient space in the buffer. Otherwise it yields a - null pointer to indicate failure due to insufficient space. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">align</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">alignment_of</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="keyword">new</span><span class="special">></span> - -<span class="keyword">struct</span> <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="identifier">type</span> <span class="special">{</span> - <span class="keyword">float</span> <span class="identifier">data</span><span class="special">[</span><span class="number">4</span><span class="special">];</span> -<span class="special">};</span> - -<span class="keyword">void</span> <span class="identifier">use</span><span class="special">(</span><span class="keyword">void</span><span class="special">*</span> <span class="identifier">ptr</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">)</span> -<span class="special">{</span> - <span class="keyword">auto</span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">align</span><span class="special">(</span><span class="number">16</span><span class="special">,</span> <span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">type</span><span class="special">),</span> <span class="identifier">ptr</span><span class="special">,</span> <span class="identifier">size</span><span class="special">);</span> - <span class="keyword">if</span> <span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="special">{</span> - <span class="keyword">auto</span> <span class="identifier">q</span> <span class="special">=</span> <span class="special">::</span><span class="keyword">new</span><span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="identifier">type</span><span class="special">;</span> - <span class="identifier">q</span><span class="special">->~</span><span class="identifier">type</span><span class="special">();</span> - <span class="special">}</span> -<span class="special">}</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="keyword">char</span> <span class="identifier">c</span><span class="special">[</span><span class="number">64</span><span class="special">];</span> - <span class="identifier">use</span><span class="special">(</span><span class="identifier">c</span><span class="special">,</span> <span class="keyword">sizeof</span> <span class="identifier">c</span><span class="special">);</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.aligned_alloc"></a><a class="link" href="tutorial.html#align.tutorial.aligned_alloc" title="aligned_alloc and aligned_free">aligned_alloc and aligned_free</a> -</h3></div></div></div> -<p> - Consider these functions alignment enabled versions of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">malloc</span></code>, - <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">free</span></code> or <code class="computeroutput"><span class="special">::</span><span class="keyword">operator</span> <span class="keyword">new</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">no_throw_t</span><span class="special">&)</span></code>, <code class="computeroutput"><span class="special">::</span><span class="keyword">operator</span> <span class="keyword">delete</span><span class="special">(</span><span class="keyword">void</span><span class="special">*)</span></code>. - The aligned allocation function allocates space with the specified size and - alignment. The aligned deallocation function can then deallocate this space. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_alloc</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="keyword">void</span><span class="special">*</span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">aligned_alloc</span><span class="special">(</span><span class="number">16</span><span class="special">,</span> <span class="number">100</span><span class="special">);</span> - <span class="keyword">if</span> <span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="special">{</span> - <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">aligned_free</span><span class="special">(</span><span class="identifier">p</span><span class="special">);</span> - <span class="special">}</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.aligned_allocator"></a><a class="link" href="tutorial.html#align.tutorial.aligned_allocator" title="aligned_allocator">aligned_allocator</a> -</h3></div></div></div> -<p> - Consider this class template a superior version of the default allocator, - <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span></code>, because it can be used with - types that are over-aligned. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_allocator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span> - -<span class="keyword">struct</span> <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="identifier">type</span> <span class="special">{</span> - <span class="keyword">float</span> <span class="identifier">data</span><span class="special">[</span><span class="number">4</span><span class="special">];</span> -<span class="special">};</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">type</span><span class="special">,</span> - <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">aligned_allocator</span><span class="special"><</span><span class="identifier">type</span><span class="special">></span> <span class="special">></span> <span class="identifier">v</span><span class="special">;</span> - <span class="identifier">v</span><span class="special">.</span><span class="identifier">emplace_back</span><span class="special">();</span> -<span class="special">}</span> -</pre> -<p> - The optional template parameter of this class allows specifying a minimum - alignment to use for allocations. The default minimum alignment is 1. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_allocator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span> - <span class="identifier">aligned_allocator</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="number">16</span><span class="special">></span> <span class="special">></span> <span class="identifier">v</span><span class="special">;</span> - <span class="identifier">v</span><span class="special">.</span><span class="identifier">emplace_back</span><span class="special">();</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.aligned_allocator_adaptor"></a><a class="link" href="tutorial.html#align.tutorial.aligned_allocator_adaptor" title="aligned_allocator_adaptor">aligned_allocator_adaptor</a> -</h3></div></div></div> -<p> - This class template can turn any existing allocator type, C++11 or C++03, - stateful or stateless, into one that supports types which are over-aligned. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_allocator_adaptor</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span> - -<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Allocator</span><span class="special">></span> -<span class="keyword">class</span> <span class="identifier">utility</span> <span class="special">{</span> -<span class="keyword">public</span><span class="special">:</span> - <span class="keyword">void</span> <span class="identifier">add</span><span class="special">()</span> <span class="special">{</span> - <span class="identifier">v</span><span class="special">.</span><span class="identifier">emplace_back</span><span class="special">();</span> - <span class="special">}</span> -<span class="keyword">private</span><span class="special">:</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span> - <span class="identifier">aligned_allocator_adaptor</span><span class="special"><</span><span class="identifier">Allocator</span><span class="special">></span> <span class="special">></span> <span class="identifier">v</span><span class="special">;</span> -<span class="special">};</span> - -<span class="keyword">struct</span> <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="identifier">type</span> <span class="special">{</span> - <span class="keyword">float</span> <span class="identifier">data</span><span class="special">[</span><span class="number">4</span><span class="special">];</span> -<span class="special">};</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="identifier">utility</span><span class="special"><</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special"><</span><span class="identifier">type</span><span class="special">></span> <span class="special">></span> <span class="identifier">u</span><span class="special">;</span> - <span class="identifier">u</span><span class="special">.</span><span class="identifier">add</span><span class="special">();</span> -<span class="special">}</span> -</pre> -<p> - The optional template parameter of this class allows specifying a minimum - alignment to use for allocations. The default minimum alignment is 1. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_allocator_adaptor</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span> - -<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Allocator</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">Alignment</span><span class="special">></span> -<span class="keyword">class</span> <span class="identifier">utility</span> <span class="special">{</span> -<span class="keyword">public</span><span class="special">:</span> - <span class="keyword">void</span> <span class="identifier">add</span><span class="special">()</span> <span class="special">{</span> - <span class="identifier">v</span><span class="special">.</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">emplace_back</span><span class="special">();</span> - <span class="special">}</span> -<span class="keyword">private</span><span class="special">:</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span> - <span class="identifier">aligned_allocator_adaptor</span><span class="special"><</span><span class="identifier">Allocator</span><span class="special">,</span> <span class="identifier">Alignment</span><span class="special">></span> <span class="special">></span> <span class="identifier">v</span><span class="special">;</span> -<span class="special">};</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="identifier">utility</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special"><</span><span class="keyword">char</span><span class="special">>,</span> <span class="number">16</span><span class="special">></span> <span class="identifier">u</span><span class="special">;</span> - <span class="identifier">u</span><span class="special">.</span><span class="identifier">add</span><span class="special">();</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.aligned_delete"></a><a class="link" href="tutorial.html#align.tutorial.aligned_delete" title="aligned_delete">aligned_delete</a> -</h3></div></div></div> -<p> - Consider this class an alignment aware version of the class template <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">default_delete</span></code>. - It is a deleter that destroys the object and then deallocates space using - our aligned deallocation function. It should be used with constructed objects - that were allocated with our aligned allocation function and is useful with - deleter enabled types like <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">unique_ptr</span></code>. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">aligned_delete</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">memory</span><span class="special">></span> - -<span class="keyword">struct</span> <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="identifier">type</span> <span class="special">{</span> - <span class="keyword">float</span> <span class="identifier">data</span><span class="special">[</span><span class="number">4</span><span class="special">];</span> -<span class="special">};</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="keyword">void</span><span class="special">*</span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">aligned_alloc</span><span class="special">(</span><span class="number">16</span><span class="special">,</span> <span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">type</span><span class="special">));</span> - <span class="keyword">if</span> <span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="special">{</span> - <span class="identifier">type</span><span class="special">*</span> <span class="identifier">q</span> <span class="special">=</span> <span class="special">::</span><span class="keyword">new</span><span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="identifier">type</span><span class="special">;</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">unique_ptr</span><span class="special"><</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">aligned_delete</span><span class="special">>(</span><span class="identifier">q</span><span class="special">);</span> - <span class="special">}</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.alignment_of"></a><a class="link" href="tutorial.html#align.tutorial.alignment_of" title="alignment_of">alignment_of</a> -</h3></div></div></div> -<p> - This type trait can be used to query the alignment requirement of a type - at compile time. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">alignment_of</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">type_traits</span><span class="special">></span> - -<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> -<span class="keyword">class</span> <span class="identifier">utility</span> <span class="special">{</span> -<span class="keyword">public</span><span class="special">:</span> - <span class="keyword">void</span> <span class="identifier">construct</span><span class="special">()</span> <span class="special">{</span> - <span class="keyword">void</span><span class="special">*</span> <span class="identifier">p</span> <span class="special">=</span> <span class="special">&</span><span class="identifier">v</span><span class="special">;</span> - <span class="special">::</span><span class="keyword">new</span><span class="special">(</span><span class="identifier">p</span><span class="special">)</span> <span class="identifier">T</span><span class="special">();</span> - <span class="special">}</span> -<span class="keyword">private</span><span class="special">:</span> - <span class="identifier">std</span><span class="special">::</span><span class="identifier">aligned_storage_t</span><span class="special"><</span><span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">T</span><span class="special">),</span> - <span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">alignment_of</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">value</span><span class="special">></span> <span class="identifier">v</span><span class="special">;</span> -<span class="special">};</span> - -<span class="keyword">struct</span> <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="identifier">type</span> <span class="special">{</span> - <span class="keyword">float</span> <span class="identifier">data</span><span class="special">[</span><span class="number">4</span><span class="special">];</span> -<span class="special">};</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="identifier">utility</span><span class="special"><</span><span class="identifier">type</span><span class="special">></span> <span class="identifier">u</span><span class="special">;</span> - <span class="identifier">u</span><span class="special">.</span><span class="identifier">construct</span><span class="special">();</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.assume_aligned"></a><a class="link" href="tutorial.html#align.tutorial.assume_aligned" title="assume_aligned">assume_aligned</a> -</h3></div></div></div> -<p> - This macro is used to notify the compiler of a given pointer variable's alignment. - It is useful for guide optimizing compilers into vectorizing or applying - other compiler specific, alignment related optimizations. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">assume_aligned</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> - -<span class="keyword">void</span> <span class="identifier">use</span><span class="special">(</span><span class="keyword">double</span><span class="special">*</span> <span class="identifier">array</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">)</span> -<span class="special">{</span> - <span class="identifier">BOOST_ALIGN_ASSUME_ALIGNED</span><span class="special">(</span><span class="identifier">array</span><span class="special">,</span> <span class="number">16</span><span class="special">);</span> - <span class="keyword">for</span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="identifier">size</span><span class="special">;</span> <span class="identifier">i</span><span class="special">++)</span> <span class="special">{</span> - <span class="identifier">array</span><span class="special">[</span><span class="identifier">i</span><span class="special">]++;</span> - <span class="special">}</span> -<span class="special">}</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="keyword">double</span> <span class="identifier">d</span><span class="special">[</span><span class="number">4</span><span class="special">]</span> <span class="special">{</span> <span class="special">};</span> - <span class="identifier">use</span><span class="special">(</span><span class="identifier">d</span><span class="special">,</span> <span class="number">4</span><span class="special">);</span> -<span class="special">}</span> -</pre> -</div> -<div class="section"> -<div class="titlepage"><div><div><h3 class="title"> -<a name="align.tutorial.is_aligned"></a><a class="link" href="tutorial.html#align.tutorial.is_aligned" title="is_aligned">is_aligned</a> -</h3></div></div></div> -<p> - This function is used to compare the alignment of a pointer. It is useful - in assertions that validate a pointer value is aligned on a given boundary. - </p> -<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">align</span><span class="special">/</span><span class="identifier">is_aligned</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> -<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span> - -<span class="keyword">void</span> <span class="identifier">use</span><span class="special">(</span><span class="keyword">void</span><span class="special">*</span> <span class="identifier">ptr</span><span class="special">)</span> -<span class="special">{</span> - <span class="identifier">assert</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">alignment</span><span class="special">::</span><span class="identifier">is_aligned</span><span class="special">(</span><span class="identifier">ptr</span><span class="special">,</span> <span class="number">16</span><span class="special">));</span> -<span class="special">}</span> - -<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> -<span class="special">{</span> - <span class="keyword">alignas</span><span class="special">(</span><span class="number">16</span><span class="special">)</span> <span class="keyword">char</span> <span class="identifier">c</span><span class="special">[</span><span class="number">64</span><span class="special">];</span> - <span class="identifier">use</span><span class="special">(</span><span class="identifier">c</span><span class="special">);</span> -<span class="special">}</span> -</pre> -</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 © 2014-2016 Glen Joseph Fernandes<p> - Distributed under the Boost Software License, Version 1.0. - </p> -</div></td> -</tr></table> -<hr> -<div class="spirit-nav"> -<a accesskey="p" href="rationale.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../align.html"><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="examples.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> -</div> -</body> -</html> |