📄 int8u ostaskquery.htm
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lang=EN-US> structure, especially </span><b><span lang=EN-US style='font-family:
"Courier New"'>OSTCBNext</span></b><span lang=EN-US> and </span><b><span
lang=EN-US style='font-family:"Courier New"'>OSTCBPrev</span></b><span
lang=EN-US> because they will point to the next and previous </span><b><span
lang=EN-US style='font-family:"Courier New"'>OS_TCB</span></b><span lang=EN-US>
in the chain of created tasks, respectively.</span></p>
<p class=NewSectionPara><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=NewSectionPara><b><span lang=EN-US>Arguments<o:p></o:p></span></b></p>
<p class=Descript><b><span lang=EN-US style='font-family:"Courier New"'>prio</span></b><span
lang=EN-US> is the priority of the task you wish to obtain data from.<span
style="mso-spacerun: yes"> </span>You can obtain information about the
calling task by specifying </span><b><span lang=EN-US style='font-family:"Courier New"'>OS_PRIO_SELF</span></b><span
lang=EN-US>.</span></p>
<p class=Descript><b><span lang=EN-US style='font-family:"Courier New"'>pdata</span></b><span
lang=EN-US> is a pointer to a structure of type </span><b><span lang=EN-US
style='font-family:"Courier New"'>OS_TCB</span></b><span lang=EN-US> which will
contain a copy of the task’s control block.</span></p>
<p class=Descript><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=NewSectionPara><b><span lang=EN-US>Returned Value<o:p></o:p></span></b></p>
<p class=Descript><b><span lang=EN-US style='font-family:"Courier New"'>OSTaskQuery()</span></b><span
lang=EN-US> returns one of these two error codes:</span></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><span
lang=EN-US>1) <span style='mso-tab-count:1'> </span></span><b><span
lang=EN-US style='font-family:"Courier New"'>OS_NO_ERR</span></b><span
lang=EN-US>, if the call was successful.</span></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><span
lang=EN-US>2)<span style='mso-tab-count:1'> </span></span><b><span
lang=EN-US style='font-family:"Courier New"'>OS_PRIO_ERR</span></b><span
lang=EN-US>, if you are trying to obtain information from an invalid task.</span></p>
<p class=NewSectionPara><b><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></b></p>
<p class=NewSectionPara><b><span lang=EN-US>Notes/Warnings<o:p></o:p></span></b></p>
<p class=Descript><span lang=EN-US>The available fields in the task control
block depends on the following configuration options (see OS_CFG.H):</span></p>
<p class=Descript><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><b><span
lang=EN-US style='font-family:"Courier New"'>OS_TASK_CREATE_EN</span></b></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><b><span
lang=EN-US style='font-family:"Courier New"'>OS_Q_EN</span></b></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><b><span
lang=EN-US style='font-family:"Courier New"'>OS_MBOX_EN</span></b></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><b><span
lang=EN-US style='font-family:"Courier New"'>OS_SEM_EN</span></b></p>
<p class=Descript style='margin-left:45.0pt;text-indent:-18.0pt'><b><span
lang=EN-US style='font-family:"Courier New"'>OS_TASK_DEL_EN</span></b></p>
<p class=Descript><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=NewSectionPara><b><span lang=EN-US>Example<o:p></o:p></span></b></p>
<div style='border:solid #999999 1.5pt;padding:1.0pt 1.0pt 15.0pt 1.0pt;
background:#F2F2F2;mso-shading:windowtext;mso-pattern:gray-5 auto'>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style='mso-tab-count:1'> </span>void Task (void *pdata)</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style='mso-tab-count:1'> </span>{</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>OS_TCB<span
style="mso-spacerun: yes"> </span>task_data;</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>INT8U<span
style="mso-spacerun: yes"> </span>err;</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>void<span
style="mso-spacerun: yes"> </span>*pext;</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>INT8U<span
style="mso-spacerun: yes"> </span>status;</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>pdata = pdata;</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>for (;;) {</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>.</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>.</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>err = OSTaskQuery(OS_PRIO_SELF, &task_data);</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>if (err == OS_NO_ERR) {</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span><span
style="mso-spacerun:
yes"> </span>pext<span
style="mso-spacerun: yes"> </span>= task_data.OSTCBExtPtr; /* Get
TCB extension pointer<span style="mso-spacerun: yes"> </span>*/</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun:
yes">
</span>status = task_data.OSTCBStat;<span style="mso-spacerun:
yes"> </span>/* Get task status<span style="mso-spacerun:
yes">
</span>*/</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun:
yes">
</span>.</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun:
yes">
</span>.<span style="mso-spacerun:
yes"> </span></span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>}</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>.</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes">
</span>.</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style="mso-spacerun: yes"> </span>}</span></p>
<p class=CodeSeg style='border:none;mso-border-alt:solid #999999 1.5pt;
padding:0cm;mso-padding-alt:1.0pt 1.0pt 15.0pt 1.0pt'><span lang=EN-US><span
style='mso-tab-count:1'> </span>}</span></p>
</div>
<p class=Code><span lang=EN-US style='font-size:9.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=Code><span lang=EN-US style='font-size:9.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
</div>
<span lang=EN-US style='font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:
"Times New Roman";mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:
EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA'><br clear=all
style='page-break-before:always;mso-break-type:section-break'>
</span>
<div class=Section2 style='layout-grid:15.6pt'>
<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
</div>
</body>
</html>
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