boost-react-native-bundle

<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Rationale</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="../circular_buffer.html" title="Chapter 7. Boost.Circular Buffer"> <link rel="prev" href="example.html" title="Circular_buffer example"> <link rel="next" href="implementation.html" title="Implementation"> </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="example.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../circular_buffer.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="implementation.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="circular_buffer.rationale"></a><a class="link" href="rationale.html" title="Rationale">Rationale</a> </h2></div></div></div> <p> The basic motivation behind the <code class="computeroutput"><a class="link" href="../boost/circular_buffer.html" title="Class template circular_buffer">circular_buffer</a></code> was to create a container which would <span class="bold"><strong>work seamlessly with STL</strong></span>. </p> <p> Additionally, the design of the <code class="computeroutput"><a class="link" href="../boost/circular_buffer.html" title="Class template circular_buffer">circular_buffer</a></code> was guided by the following principles: </p> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> Maximum <span class="emphasis"><em>efficiency</em></span> for envisaged applications. </li> <li class="listitem"> Suitable for <span class="emphasis"><em>general purpose use</em></span>. </li> <li class="listitem"> The behaviour of the buffer as <span class="emphasis"><em>intuitive</em></span> as possible. </li> <li class="listitem"> Suitable for <span class="emphasis"><em>specialization</em></span> by means of adaptors. (The <code class="computeroutput"><a class="link" href="../boost/circular_buffe_idp31480224.html" title="Class template circular_buffer_space_optimized">circular_buffer_space_optimized</a></code> is such an example of the adaptor.) </li> <li class="listitem"> Easy to <span class="emphasis"><em>debug</em></span>. (See Debug Support for details.) </li> </ul></div> <p> In order to achieve maximum efficiency, the <code class="computeroutput"><a class="link" href="../boost/circular_buffer.html" title="Class template circular_buffer">circular_buffer</a></code> and <code class="computeroutput"><a class="link" href="../boost/circular_buffe_idp31480224.html" title="Class template circular_buffer_space_optimized">circular_buffer_space_optimized</a></code> store their elements in a <span class="bold"><strong>contiguous region of memory</strong></span>, which then enables: </p> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> Use of fixed memory and no implicit or unexpected memory allocation. </li> <li class="listitem"> Fast constant-time insertion and removal of elements from the front and back. </li> <li class="listitem"> Fast constant-time random access of elements. </li> <li class="listitem"> Suitability for real-time and performance critical applications. </li> </ul></div> <p> Possible applications of the circular buffer include: </p> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> Storage of the <span class="emphasis"><em>most recently received samples</em></span>, overwriting the oldest as new samples arrive. </li> <li class="listitem"> As an underlying container for a <span class="emphasis"><em>bounded buffer</em></span> (see the Bounded Buffer example, code at <a href="../../../libs/circular_buffer/example/circular_buffer_bound_example.cpp" target="_top">circular_buffer_bound_example.cpp</a>). </li> <li class="listitem"> A kind of <span class="emphasis"><em>cache</em></span> storing a specified number of last inserted elements. </li> <li class="listitem"> Efficient fixed capacity <span class="emphasis"><em>FIFO (First In, First Out)</em></span>, </li> <li class="listitem"> Efficient fixed capacity <span class="emphasis"><em>LIFO (Last In, First Out)</em></span> queue which removes the oldest (inserted as first) elements when full. </li> </ul></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 © 2003-2013 Jan Gaspar<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="example.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../circular_buffer.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="implementation.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>