150 lines
5.5 KiB
HTML
150 lines
5.5 KiB
HTML
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<title>pthread_condattr_getclock</title>
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<basefont size="3"> <a name="pthread_condattr_getclock"></a> <a name="tag_03_520"></a><!-- pthread_condattr_getclock -->
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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_520_01"></a>NAME</h4>
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<blockquote>pthread_condattr_getclock, pthread_condattr_setclock - get and set the clock selection condition variable attribute
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(<b>ADVANCED REALTIME</b>)</blockquote>
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<h4><a name="tag_03_520_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('THR CS')">THR CS</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/pthread.h.html">pthread.h</a>><br>
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<br>
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int pthread_condattr_getclock(const pthread_condattr_t *restrict</tt> <i>attr</i><tt>,<br>
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clockid_t *restrict</tt> <i>clock_id</i><tt>);<br>
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int pthread_condattr_setclock(pthread_condattr_t *</tt><i>attr</i><tt>,<br>
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clockid_t</tt> <i>clock_id</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]"
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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_520_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>pthread_condattr_getclock</i>() function shall obtain the value of the <i>clock</i> attribute from the attributes object
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referenced by <i>attr</i>. The <i>pthread_condattr_setclock</i>() function shall set the <i>clock</i> attribute in an initialized
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attributes object referenced by <i>attr</i>. If <i>pthread_condattr_setclock</i>() is called with a <i>clock_id</i> argument that
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refers to a CPU-time clock, the call shall fail.</p>
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<p>The <i>clock</i> attribute is the clock ID of the clock that shall be used to measure the timeout service of <a href=
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"../functions/pthread_cond_timedwait.html"><i>pthread_cond_timedwait</i>()</a>. The default value of the <i>clock</i> attribute
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shall refer to the system clock.</p>
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</blockquote>
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<h4><a name="tag_03_520_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>If successful, the <i>pthread_condattr_getclock</i>() function shall return zero and store the value of the clock attribute of
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<i>attr</i> into the object referenced by the <i>clock_id</i> argument. Otherwise, an error number shall be returned to indicate
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the error.</p>
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<p>If successful, the <i>pthread_condattr_setclock</i>() function shall return zero; otherwise, an error number shall be returned
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to indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_520_05"></a>ERRORS</h4>
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<blockquote>
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<p>These functions may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The value specified by <i>attr</i> is invalid.</dd>
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</dl>
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<p>The <i>pthread_condattr_setclock</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 specified by <i>clock_id</i> does not refer to a known clock, or is a CPU-time clock.</dd>
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</dl>
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<p>These functions shall not return an error code of [EINTR].</p>
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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_520_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_520_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_520_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_520_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_520_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="pthread_cond_destroy.html"><i>pthread_cond_destroy</i>()</a> , <a href=
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"pthread_cond_timedwait.html"><i>pthread_cond_timedwait</i>()</a> , <a href=
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"pthread_condattr_destroy.html"><i>pthread_condattr_destroy</i>()</a> , <a href=
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"pthread_condattr_getpshared.html"><i>pthread_condattr_getpshared</i>()</a> ,1 <a href=
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"pthread_condattr_init.html"><i>pthread_condattr_init</i>()</a> , <a href=
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"pthread_condattr_setpshared.html"><i>pthread_condattr_setpshared</i>()</a> ,1 <a href=
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"pthread_create.html"><i>pthread_create</i>()</a> , <a href="pthread_mutex_init.html"><i>pthread_mutex_init</i>()</a> , the Base
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Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/pthread.h.html"><i><pthread.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_520_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from IEEE Std 1003.1j-2000.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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