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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 >Task-Dependent Synchronization 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="Task Management Functions" HREF="compat-uitron-task-management-functions.html"><LINK REL="NEXT" TITLE=" Synchronization and Communication Functions" HREF="compat-uitron-sync-and-comm-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-task-management-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-sync-and-comm-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-TASK-DEPENDENT-SYNCH-FUNCTIONS">Task-Dependent Synchronization 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" >sus_tsk</TT >( ID <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tskid</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >rsm_tsk</TT >( ID <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tskid</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >frsm_tsk</TT >( ID <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tskid</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >slp_tsk</TT >( void )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >tslp_tsk</TT >( TMO <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tmout</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >wup_tsk</TT >( ID <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tskid</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >ER <TT CLASS="FUNCTION" >can_wup</TT >( INT *<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >p_wupcnt,</I ></SPAN > ID <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >tskid</I ></SPAN > )</PRE ></TD ></TR ></TABLE ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN13571">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 (see the configuration option “Return Error Codes for Bad Params”):</P ><P ></P ><UL ><LI ><P >invalid tskid; less than 1 or greater than <TT CLASS="LITERAL" >CYGNUM_UITRON_TASKS</TT > returns E_ID</P ></LI ><LI ><P ><TT CLASS="FUNCTION" >wup_tsk()</TT > , <TT CLASS="FUNCTION" >sus_tsk()</TT > , <TT CLASS="FUNCTION" >rsm_tsk()</TT > , <TT CLASS="FUNCTION" >frsm_tsk()</TT > on the calling task returns E_OBJ</P ></LI ><LI ><P >dispatching is enabled in <TT CLASS="FUNCTION" >tslp_tsk()</TT > and <TT CLASS="FUNCTION" >slp_tsk()</TT > , or E_CTX</P ></LI ><LI ><P >tmout must be positive, otherwise E_PAR</P ></LI ><LI ><P >return value pointer in <TT CLASS="FUNCTION" >can_wup()</TT > is a valid pointer, or E_PAR</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 >When create and delete functions <TT CLASS="FUNCTION" >cre_tsk()</TT > and <TT CLASS="FUNCTION" >del_tsk()</TT > are supported, all calls which use a valid task ID number check that the task exists; if not, E_NOEXS is returned</P ></LI ><LI ><P ><TT CLASS="FUNCTION" >sus_tsk()</TT > : the task must not be dormant, else E_OBJ</P ></LI ><LI ><P ><TT CLASS="FUNCTION" >frsm/rsm_tsk()</TT > : the task must be suspended, else E_OBJ</P ></LI ><LI ><P ><TT CLASS="FUNCTION" >tslp/slp_tsk()</TT > : return codes E_TMOUT, E_RLWAI and E_DLT are returned depending on the reason for terminating the sleep</P ></LI ><LI ><P ><TT CLASS="FUNCTION" >wup_tsk()</TT > and <TT CLASS="FUNCTION" >can_wup()</TT > : the task must not be dormant, or E_OBJ is returned</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-task-management-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-sync-and-comm-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Task 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" >Synchronization and Communication Functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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