139 lines
4.9 KiB
HTML
139 lines
4.9 KiB
HTML
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<title>posix_trace_start</title>
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<basefont size="3"> <a name="posix_trace_start"></a> <a name="tag_03_476"></a><!-- posix_trace_start -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_476_01"></a>NAME</h4>
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<blockquote>posix_trace_start, posix_trace_stop - trace start and stop (<b>TRACING</b>)</blockquote>
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<h4><a name="tag_03_476_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('TRC')">TRC</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/trace.h.html">trace.h</a>><br>
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<br>
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int posix_trace_start(trace_id_t</tt> <i>trid</i><tt>);<br>
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int posix_trace_stop (trace_id_t</tt> <i>trid</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_476_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>posix_trace_start</i>() and <i>posix_trace_stop</i>() functions, respectively, shall start and stop the trace stream
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identified by the argument <i>trid</i>.</p>
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<p>The effect of calling the <i>posix_trace_start</i>() function shall be recorded in the trace stream as the POSIX_TRACE_START
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system trace event and the status of the trace stream shall become POSIX_TRACE_RUNNING. If the trace stream is in progress when
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this function is called, the POSIX_TRACE_START system trace event shall not be recorded and the trace stream shall continue to run.
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If the trace stream is full, the POSIX_TRACE_START system trace event shall not be recorded and the status of the trace stream
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shall not be changed.</p>
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<p>The effect of calling the <i>posix_trace_stop</i>() function shall be recorded in the trace stream as the POSIX_TRACE_STOP
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system trace event and the status of the trace stream shall become POSIX_TRACE_SUSPENDED. If the trace stream is suspended when
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this function is called, the POSIX_TRACE_STOP system trace event shall not be recorded and the trace stream shall remain suspended.
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If the trace stream is full, the POSIX_TRACE_STOP system trace event shall not be recorded and the status of the trace stream shall
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not be changed.</p>
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</blockquote>
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<h4><a name="tag_03_476_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, these functions shall return a value of zero. Otherwise, they shall return the corresponding error
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number.</p>
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</blockquote>
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<h4><a name="tag_03_476_05"></a>ERRORS</h4>
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<blockquote>
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<p>These functions shall fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The value of the argument <i>trid</i> does not correspond to an active trace stream and thus no trace stream was started or
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stopped.</dd>
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<dt>[EINTR]</dt>
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<dd>The operation was interrupted by a signal and thus the trace stream was not necessarily started or stopped.</dd>
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</dl>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_476_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_476_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_476_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_476_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_476_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="posix_trace_create.html"><i>posix_trace_create</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/trace.h.html"><i><trace.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_476_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from IEEE Std 1003.1q-2000.</p>
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<p>IEEE PASC Interpretation 1003.1 #123 is applied.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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POSIX ® is a registered Trademark of The IEEE.<br>
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