ceph/src/boost/libs/iostreams/doc/concepts/direct.html

   1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
   2 <HTML>
   3 <HEAD>
   4     <TITLE>Direct</TITLE>
   5     <LINK REL="stylesheet" HREF="../../../../boost.css">
   6     <LINK REL="stylesheet" HREF="../theme/iostreams.css">
   7 </HEAD>
   8 <BODY>
   9
  10 <!-- Begin Banner -->
  11
  12     <H1 CLASS="title">Direct</H1>
  13     <HR CLASS="banner">
  14
  15 <!-- End Banner -->
  16
  17 <H2>Description</H2>
  18
  19 <P>
  20     A Device is Direct if it provides access to its controlled sequences as in-memory arrays rather than <I>via</I> a socket-like interface. The difference between a Device which is Direct and one which is not is reflected in the specifications of the various Device refinements, <I>e.g.</I>, <A HREF="source.html">Source</A> and <A HREF="sink.html">Sink</A>.</P>
  21 </P>
  22
  23 <P>
  24     A model of <A HREF="device.html">Device</A> which does not model Direct is called <SPAN CLASS="term">indirect</SPAN>.
  25 </P>
  26
  27 <H2>Refinement of</H2>
  28
  29 <P><A HREF="device.html">Device</A>.</P>
  30
  31 <A NAME="types"></A>
  32 <H2>Associated Types</H2>
  33
  34 <P>Same as <A HREF="device.html#types">Device</A>, with the following additional requirements:</P>
  35
  36 <TABLE CELLPADDING="5" BORDER="1">
  37     <TR><TD>Category</TD><TD>A type convertible to <A HREF="../guide/traits.html#category_tags"><CODE>device_tag</CODE></A> and to <A HREF="../guide/traits.html#category_tags"><CODE>direct_tag</CODE></A></TD></TR>
  38 </TABLE>
  39
  40 <A NAME="expressions"></A>
  41 <H2>Valid Expressions / Semantics</H2>
  42
  43 <P>Same as <A HREF="device.html">Device</A>.</P>
  44
  45 <H2>Models</H2>
  46
  47 <UL>
  48     <LI>The <A HREF="../classes/array.html">Array Devices</A>
  49     <LI>The <A HREF="../classes/mapped_file.html">Memory-Mapped File Devices</A>
  50 </UL>
  51
  52 <!-- Begin Footer -->
  53
  54 <HR>
  55
  56 <P CLASS="copyright">&copy; Copyright 2008 <a href="http://www.coderage.com/" target="_top">CodeRage, LLC</a><br/>&copy; Copyright 2004-2007 <a href="http://www.coderage.com/turkanis/" target="_top">Jonathan Turkanis</a></P>
  57 <P CLASS="copyright">
  58     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">http://www.boost.org/LICENSE_1_0.txt</A>)
  59 </P>
  60
  61 <!-- End Footer -->
  62
  63 </BODY>