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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>Clocks and Timers [POSIX Section 14]</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="POSIX Standard Support"HREF="posix-standard-support.html"><LINKREL="PREVIOUS"TITLE="Execution Scheduling [POSIX Section 13]"HREF="posix-execution-scheduling.html"><LINKREL="NEXT"TITLE="Message Passing [POSIX Section 15]"HREF="posix-message-passing.html"></HEAD><BODYCLASS="SECT1"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">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="posix-execution-scheduling.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 31. POSIX Standard Support</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="posix-message-passing.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="POSIX-CLOCKS-AND-TIMERS">Clocks and Timers &#0091;POSIX Section 14&#0093;</H1><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13230">Functions Implemented</H2><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">int clock&#0095;settime( clockid&#0095;t clock&#0095;id,const struct timespec &#0042;tp); int clock&#0095;gettime( clockid&#0095;t clock&#0095;id, struct timespec &#0042;tp); int clock&#0095;getres( clockid&#0095;t clock&#0095;id, struct timespec &#0042;tp); int timer&#0095;create( clockid&#0095;t clock&#0095;id, struct sigevent &#0042;evp,	          timer&#0095;t &#0042;timer&#0095;id);int timer&#0095;delete( timer&#0095;t timer&#0095;id ); int timer&#0095;settime( timer&#0095;t timerid, int flags,	           const struct itimerspec &#0042;value,	           struct itimerspec &#0042;ovalue ); int timer&#0095;gettime( timer&#0095;t timerid, struct itimerspec &#0042;value ); int timer&#0095;getoverrun( timer&#0095;t timerid ); int nanosleep( const struct timespec &#0042;rqtp, struct timespec &#0042;rmtp);</PRE></TD></TR></TABLE></DIV><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13233">Functions Omitted</H2><P>&lt;none&gt;</P></DIV><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13236">Notes</H2><P></P><UL><LI><P>    Currently <SPANCLASS="emphasis"><ICLASS="EMPHASIS">timer&#0095;getoverrun()</I></SPAN> only    reports timer notifications that are delayed in the timer    subsystem.  If they are delayed in the signal subsystem, due to    signal masks for example, this is not counted as an overrun.    </P></LI><LI><P>    The option CYGPKG&#0095;POSIX&#0095;TIMERS allows the timer support to be    enabled or disabled, and causes &#0095;POSIX&#0095;TIMERS to be defined    appropriately. This will cause other parts of the POSIX system to    have limited functionality.    </P></LI></UL></DIV></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="posix-execution-scheduling.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="posix-message-passing.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Execution Scheduling &#0091;POSIX Section 13&#0093;</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="posix-standard-support.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Message Passing &#0091;POSIX Section 15&#0093;</TD></TR></TABLE></DIV></BODY></HTML>
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