projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
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">© Copyright 2008 <a href="http://www.coderage.com/" target="_top">CodeRage, LLC</a><br/>© 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> |