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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><TITLE
>Time Management Functions</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
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>Chapter 32. &micro;ITRON API</TD
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><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
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