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📁 有关ecos2。0介绍了实时嵌入式的结构以及线程调度的实现和内存的管理等
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<!-- Copyright (C) 2003 Red Hat, Inc.                                --><!-- This material may be distributed only subject to the terms      --><!-- and conditions set forth in the Open Publication License, v1.0  --><!-- or later (the latest version is presently available at          --><!-- http://www.opencontent.org/openpub/).                           --><!-- Distribution of the work or derivative of the work in any       --><!-- standard (paper) book form is prohibited unless prior           --><!-- permission is obtained from the copyright holder.               --><HTML><HEAD><TITLE>display</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="The eCos Component Writer's Guide"HREF="cdl-guide.html"><LINKREL="UP"TITLE="CDL Language Specification"HREF="reference.html"><LINKREL="PREVIOUS"TITLE="description"HREF="ref.description.html"><LINKREL="NEXT"TITLE="doc"HREF="ref.doc.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">The <SPANCLASS="APPLICATION">eCos</SPAN> Component Writer's Guide</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="ref.description.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="ref.doc.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="REF.DISPLAY"><SPANCLASS="PROPERTY">display</SPAN></H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN4249"></A><H2>Name</H2>Property <SPANCLASS="PROPERTY">display</SPAN>&nbsp;--&nbsp;Provide a short string describing this option.</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN4253"><H2>Synopsis</H2><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SYNOPSIS">cdl_option &lt;name&gt; {    display &lt;string&gt;    &#8230;}</PRE></TD></TR></TABLE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4255"></A><H2>Description</H2><P>Users can only be expected to manipulate configuration optionssensibly if they are given sufficient information about these options.There are three properties which serve to explain an option in plaintext: the <SPANCLASS="PROPERTY">display</SPAN> property gives a textual alias for an option,which is usually more comprehensible than something like<TTCLASS="LITERAL">CYGPKG_LIBC_TIME_ZONES</TT>; the <SPANCLASS="PROPERTY">description</SPAN> propertygives a longer description, typically a paragraph or so; the <SPANCLASS="PROPERTY">doc</SPAN>property specifies the location of additional on-line documentationrelated to a configuration option. In the context of a graphical toolthe <SPANCLASS="PROPERTY">display</SPAN> string will be the primary way for users to identifyconfiguration options; the <SPANCLASS="PROPERTY">description</SPAN> paragraph will be visiblewhenever the option is selected; the on-line documentation will onlybe accessed when the user explicitly requests it.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4264"></A><H2>Example</H2><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="PROGRAMLISTING">cdl_option CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE {    display       "Message box queue size"    flavor        data    legal_values  1 to 65535    default_value 10    description   "        This configuration option controls the number of messages        that can be queued in a message box before a non-blocking        put() operation will fail or a blocking put() operation will        block. The cost in memory is one pointer per message box for        each possible message."}</PRE></TD></TR></TABLE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4267"></A><H2>See Also</H2><P>Properties <AHREF="ref.description.html"><SPANCLASS="PROPERTY">description</SPAN></A> and<AHREF="ref.doc.html"><SPANCLASS="PROPERTY">doc</SPAN></A>.</P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="ref.description.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="cdl-guide.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="ref.doc.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><SPANCLASS="PROPERTY">description</SPAN></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="reference.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><SPANCLASS="PROPERTY">doc</SPAN></TD></TR></TABLE></DIV></BODY></HTML>
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