63 lines
2.1 KiB
HTML
63 lines
2.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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<HEAD>
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<TITLE>Direct</TITLE>
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<LINK REL="stylesheet" HREF="../../../../boost.css">
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<LINK REL="stylesheet" HREF="../theme/iostreams.css">
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</HEAD>
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<BODY>
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<!-- Begin Banner -->
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<H1 CLASS="title">Direct</H1>
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<HR CLASS="banner">
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<!-- End Banner -->
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<H2>Description</H2>
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<P>
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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>
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</P>
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<P>
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A model of <A HREF="device.html">Device</A> which does not model Direct is called <SPAN CLASS="term">indirect</SPAN>.
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</P>
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<H2>Refinement of</H2>
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<P><A HREF="device.html">Device</A>.</P>
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<A NAME="types"></A>
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<H2>Associated Types</H2>
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<P>Same as <A HREF="device.html#types">Device</A>, with the following additional requirements:</P>
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<TABLE CELLPADDING="5" BORDER="1">
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<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>
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</TABLE>
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<A NAME="expressions"></A>
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<H2>Valid Expressions / Semantics</H2>
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<P>Same as <A HREF="device.html">Device</A>.</P>
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<H2>Models</H2>
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<UL>
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<LI>The <A HREF="../classes/array.html">Array Devices</A>
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<LI>The <A HREF="../classes/mapped_file.html">Memory-Mapped File Devices</A>
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</UL>
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<!-- Begin Footer -->
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<HR>
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<P CLASS="copyright">© Copyright 2008 <a href="http://www.coderage.com/" target="_top">CodeRage, LLC</a><br/>© Copyright 2004-2007 <a href="https://www.boost.org/users/people/jonathan_turkanis.html" target="_top">Jonathan Turkanis</a></P>
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<P CLASS="copyright">
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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>)
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</P>
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<!-- End Footer -->
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</BODY> |