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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 >Time Management Functions</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="µITRON API" HREF="compat-uitron-microitron-api.html"><LINK REL="PREVIOUS" TITLE=" Memory pool Management Functions" HREF="compat-uitron-memory-pool-mgmt-functions.html"><LINK REL="NEXT" TITLE=" System Management Functions" HREF="compat-uitron-system-mgmt-functions.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="compat-uitron-memory-pool-mgmt-functions.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 32. µITRON API</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="compat-uitron-system-mgmt-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="COMPAT-UITRON-TIME-MGMT-FUNCTIONS">Time Management Functions</H1 ><P >These functions are fully supported in this release: </P ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >set_tim</TT >( SYSTIME *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_tim</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><DIV CLASS="CAUTION" ><P ></P ><TABLE CLASS="CAUTION" BORDER="1" WIDTH="100%" ><TR ><TD ALIGN="CENTER" ><B >Caution</B ></TD ></TR ><TR ><TD ALIGN="LEFT" ><P > Setting the time may cause erroneous operation of the kernel, for example a task performing a wait with a time-out may never awaken.</P ></TD ></TR ></TABLE ></DIV ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >get_tim</TT >( SYSTIME *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_tim</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >dly_tsk</TT >( DLYTIME <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >dlytim</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >def_cyc</TT >( HNO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >cycno,</I ></SPAN > T_DCYC *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_dcyc</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >act_cyc</TT >( HNO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >cycno,</I ></SPAN > UINT <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >cycact</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >ref_cyc</TT >( T_RCYC *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_rcyc,</I ></SPAN > HNO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >cycno</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >def_alm</TT >( HNO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >almno,</I ></SPAN > T_DALM *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_dalm</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >ref_alm</TT >( T_RALM *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >pk_ralm,</I ></SPAN > HNO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >almno</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >void <TT CLASS="FUNCTION" >ret_tmr</TT >( void )</PRE ></TD ></TR ></TABLE ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN14010">Error checking</H2 ><P >The following conditions are only checked for, and only return errors if <TT CLASS="LITERAL" >CYGSEM_UITRON_BAD_PARAMS_RETURN_ERRORS</TT > is enabled:</P ><P ></P ><UL ><LI ><P >invalid handler number; less than 1 or greater than <TT CLASS="LITERAL" >CYGNUM_UITRON_CYCLICS/ALARMS</TT > as appropriate, or E_PAR</P ></LI ><LI ><P >dispatching is enabled in <TT CLASS="FUNCTION" >dly_tsk()</TT > , or E_CTX</P ></LI ><LI ><P >dlytim must be positive or zero, otherwise E_PAR</P ></LI ><LI ><P >return value pointer in <TT CLASS="FUNCTION" >ref_xxx()</TT > is a valid pointer, or E_PAR</P ></LI ><LI ><P >params within pk_dalm and pk_dcyc must be valid, or E_PAR</P ></LI ><LI ><P >cycact in <TT CLASS="FUNCTION" >act_cyc()</TT > must be valid, or E_PAR</P ></LI ><LI ><P >handler must be defined in <TT CLASS="FUNCTION" >ref_xxx()</TT > and <TT CLASS="FUNCTION" >act_cyc()</TT > , or E_NOEXS</P ></LI ><LI ><P >parameter pointer must be a good pointer in <TT CLASS="FUNCTION" >get_tim()</TT > and <TT CLASS="FUNCTION" >set_tim()</TT > , otherwise E_PAR is returned</P ></LI ></UL ><P >The following conditions are checked for, and can return error codes, regardless of the setting of <TT CLASS="LITERAL" >CYGSEM_UITRON_BAD_PARAMS_RETURN_ERRORS</TT > :</P ><P ></P ><UL ><LI ><P ><TT CLASS="FUNCTION" >dly_tsk()</TT > : return code E_RLWAI is returned depending on the reason for terminating the sleep</P ></LI ></UL ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="compat-uitron-memory-pool-mgmt-functions.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="compat-uitron-system-mgmt-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Memory pool Management Functions</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="compat-uitron-microitron-api.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >System Management Functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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