+++ /dev/null
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-><P
->These functions are fully supported in this release: </P
-><TABLE
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-><TD
-><PRE
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->ER <TT
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->(
- ID <SPAN
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->(
- ID <SPAN
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-><PRE
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->ER <TT
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->preq_sem</TT
->(
- ID <SPAN
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-><I
-CLASS="EMPHASIS"
->semid</I
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-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
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->twai_sem</TT
->(
- ID <SPAN
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-><I
-CLASS="EMPHASIS"
->semid,</I
-></SPAN
-> 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"
->ref_sem</TT
->(
- T_RSEM *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_rsem ,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->semid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->set_flg</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid,</I
-></SPAN
-> UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->setptn</I
-></SPAN
-> )</PRE
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-BORDER="5"
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-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->clr_flg</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid,</I
-></SPAN
-> UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->clrptn</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->wai_flg</TT
->(
- UINT *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->p_flgptn,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid ,</I
-></SPAN
->
- UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->waiptn ,</I
-></SPAN
-> UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->wfmode</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->pol_flg</TT
->(
- UINT *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->p_flgptn,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid ,</I
-></SPAN
->
- UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->waiptn ,</I
-></SPAN
-> UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->wfmode</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->twai_flg</TT
->(
- UINT *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->p_flgptn</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid ,</I
-></SPAN
->
- UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->waiptn ,</I
-></SPAN
-> UINT <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->wfmode,</I
-></SPAN
-> 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"
->ref_flg</TT
->(
- T_RFLG *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_rflg,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->snd_msg</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid,</I
-></SPAN
-> T_MSG <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->*pk_msg</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->rcv_msg</TT
->(
- T_MSG **<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->ppk_msg,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->prcv_msg</TT
->(
- T_MSG **<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->ppk_msg,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->trcv_msg</TT
->(
- T_MSG **<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->ppk_msg,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid ,</I
-></SPAN
-> 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"
->ref_mbx</TT
->(
- T_RMBX *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_rmbx,</I
-></SPAN
-> ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><P
->The following functions are supported in this release (with
-some restrictions) if enabled with the appropriate configuration
-option for the object type (for example
-<TT
-CLASS="LITERAL"
->CYGPKG_UITRON_SEMAS_CREATE_DELETE</TT
->):</P
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->cre_sem</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->semid,</I
-></SPAN
-> T_CSEM *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_csem</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->del_sem</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->semid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->cre_flg</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid,</I
-></SPAN
-> T_CFLG *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_cflg</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->del_flg</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->flgid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->cre_mbx</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid,</I
-></SPAN
-> T_CMBX *<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pk_cmbx</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
->ER <TT
-CLASS="FUNCTION"
->del_mbx</TT
->(
- ID <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->mbxid</I
-></SPAN
-> )</PRE
-></TD
-></TR
-></TABLE
-><P
->In general the queueing order when waiting on a synchronization
-object depends on the underlying kernel configuration. The multi-level
-queue scheduler is required for strict µITRON
-conformance and it queues tasks in FIFO order, so requests to create
-an object with priority queueing of tasks (<TT
-CLASS="LITERAL"
->pk_cxxx->xxxatr = TA_TPRI</TT
->)
-are rejected with E_RSATR. Additional undefined bits in
-the attributes fields must be zero. </P
-><P
->In general, extended information (pk_cxxx->exinf)
-is ignored. </P
-><P
->For semaphores, the initial semaphore count (pk_csem->isemcnt)
-is supported; the new semaphore's count is set. The maximum
-count is not supported, and is not in fact defined in type pk_csem. </P
-><P
->For flags, multiple tasks are allowed to wait. Because single
-task waiting is a subset of this, the W bit (TA_WMUL) of
-the flag attributes is ignored; all other bits must be zero. The
-initial flag value is supported. </P
-><P
->For mailboxes, the buffer count is defined statically by kernel
-configuration option
-<TT
-CLASS="LITERAL"
->CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE</TT
->;
-therefore the buffer count field is not supported and is not in
-fact defined in type pk_cmbx. Queueing of messages is FIFO
-ordered only, so TA_MPRI (in pk_cmbx->mbxatr)
-is not supported. </P
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="AEN13716">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 object id; less than 1 or greater than
-<TT
-CLASS="LITERAL"
->CYGNUM_UITRON_TASKS/SEMAS/MBOXES</TT
->
-as appropriate returns E_ID</P
-></LI
-><LI
-><P
->dispatching is enabled in any call which can sleep, or
-E_CTX</P
-></LI
-><LI
-><P
->tmout must be positive, otherwise E_PAR</P
-></LI
-><LI
-><P
->pk_cxxx pointers in
-<TT
-CLASS="FUNCTION"
->cre_xxx()</TT
->
- must be valid pointers, or E_PAR</P
-></LI
-><LI
-><P
->return value pointer in
-<TT
-CLASS="FUNCTION"
->ref_xxx()</TT
->
- is valid pointer, or E_PAR</P
-></LI
-><LI
-><P
->flag wait pattern must be non-zero, and mode must be valid,
-or E_PAR</P
-></LI
-><LI
-><P
->return value pointer in flag wait calls 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_xxx()</TT
->
- and
-<TT
-CLASS="FUNCTION"
->del_xxx()</TT
->
- are supported, all calls which use a valid object ID number check
-that the object exists. If not, E_NOEXS is returned.</P
-></LI
-><LI
-><P
->In create functions
-<TT
-CLASS="FUNCTION"
->cre_xxx()</TT
->
-, when supported, if the object already exists, then E_OBJ</P
-></LI
-><LI
-><P
->In any call which can sleep, such as
-<TT
-CLASS="FUNCTION"
->twai_sem()</TT
->
-: return codes E_TMOUT, E_RLWAI, E_DLT
-or of course E_OK are returned depending on the reason
-for terminating the sleep</P
-></LI
-><LI
-><P
->In polling functions such as
-<TT
-CLASS="FUNCTION"
->preq_sem()</TT
->
-return codes E_TMOUT or E_OK are returned depending
-on the state of the synchronization object</P
-></LI
-><LI
-><P
->In creation functions, the attributes must be compatible
-with the selected underlying kernel configuration: in
-<TT
-CLASS="FUNCTION"
->cre_sem()</TT
->
- <TT
-CLASS="LITERAL"
->pk_csem->sematr</TT
->
- must be equal to
-<TT
-CLASS="LITERAL"
->TA_TFIFO</TT
->
- else E_RSATR.</P
-></LI
-><LI
-><P
->In
-<TT
-CLASS="FUNCTION"
->cre_flg()</TT
->
- <TT
-CLASS="LITERAL"
->pk_cflg->flgatr</TT
->
- must be either
-<TT
-CLASS="VARNAME"
->TA_WMUL</TT
->
- or
-<TT
-CLASS="VARNAME"
->TA_WSGL</TT
->
- else <TT
-CLASS="VARNAME"
->E_RSATR</TT
->.</P
-></LI
-><LI
-><P
->In
-<TT
-CLASS="FUNCTION"
->cre_mbx()</TT
->
-
-<TT
-CLASS="LITERAL"
->pk_cmbx->mbxatr</TT
->
- must be
-<TT
-CLASS="LITERAL"
->TA_TFIFO + TA_MFIFO</TT
->
- else E_RSATR.</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"
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->Prev</A
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-VALIGN="top"
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-ACCESSKEY="H"
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