153 lines
5.8 KiB
HTML
153 lines
5.8 KiB
HTML
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<title>posix_trace_attr_destroy</title>
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<basefont size="3"> <a name="posix_trace_attr_destroy"></a> <a name="tag_03_447"></a><!-- posix_trace_attr_destroy -->
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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_447_01"></a>NAME</h4>
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<blockquote>posix_trace_attr_destroy, posix_trace_attr_init - destroy and initialize the trace stream attributes object
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(<b>TRACING</b>)</blockquote>
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<h4><a name="tag_03_447_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_attr_destroy(trace_attr_t *</tt><i>attr</i><tt>);<br>
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int posix_trace_attr_init(trace_attr_t *</tt><i>attr</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border=
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"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_447_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>posix_trace_attr_destroy</i>() function shall destroy an initialized trace attributes object. A destroyed <i>attr</i>
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attributes object can be reinitialized using <i>posix_trace_attr_init</i>(); the results of otherwise referencing the object after
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it has been destroyed are undefined.</p>
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<p>The <i>posix_trace_attr_init</i>() function shall initialize a trace attributes object <i>attr</i> with the default value for
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all of the individual attributes used by a given implementation. The read-only <i>generation-version</i> and
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<i>clock-resolution</i> attributes of the newly initialized trace attributes object shall be set to their appropriate values (see
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<a href="xsh_chap02_11.html#tag_02_11_01_04"><i>Trace Stream Attributes</i></a> ).</p>
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<p>Results are undefined if <i>posix_trace_attr_init</i>() is called specifying an already initialized <i>attr</i> attributes
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object.</p>
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<p>Implementations may add extensions to the trace attributes object structure as permitted in the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap02.html#tag_02">Chapter 2, Conformance</a>.</p>
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<p>The resulting attributes object (possibly modified by setting individual attributes values), when used by <a href=
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"../functions/posix_trace_create.html"><i>posix_trace_create</i>()</a>, defines the attributes of the trace stream created. A
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single attributes object can be used in multiple calls to <a href=
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"../functions/posix_trace_create.html"><i>posix_trace_create</i>()</a>. After one or more trace streams have been created using an
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attributes object, any function affecting that attributes object, including destruction, shall not affect any trace stream
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previously created. An initialized attributes object also serves to receive the attributes of an existing trace stream or trace log
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when calling the <a href="../functions/posix_trace_get_attr.html"><i>posix_trace_get_attr</i>()</a> function.</p>
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</blockquote>
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<h4><a name="tag_03_447_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_447_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>posix_trace_attr_destroy</i>() function may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The value of <i>attr</i> is invalid.</dd>
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</dl>
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<p>The <i>posix_trace_attr_init</i>() function shall fail if:</p>
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<dl compact>
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<dt>[ENOMEM]</dt>
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<dd>Insufficient memory exists to initialize the trace attributes object.</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_447_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_447_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_447_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_447_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_447_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> , <a href=
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"posix_trace_get_attr.html"><i>posix_trace_get_attr</i>()</a> , <a href="uname.html"><i>uname</i>()</a> , the Base Definitions
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volume of 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_447_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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