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<h1>Thread creation attributes.<br>
<small>
[<a class="el" href="group__posix__thread.html">Threads management services.</a>]</small>
</h1>
<p>
<div class="dynheader">
Collaboration diagram for Thread creation attributes.:</div>
<div class="dynsection">
<center><table><tr><td><img src="group__posix__threadattr.png" border="0" alt="" usemap="#group____posix____threadattr_map">
<map name="group____posix____threadattr_map">
<area shape="rect" href="group__posix__thread.html" title="Threads management services." alt="" coords="5,5,229,32"></map></td></tr></table></center>
</div>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Thread creation attributes.
<p>
The services described in this section allow to set the attributes of a <b>pthread_attr_t</b> object, passed to the <a class="el" href="group__posix__thread.html#ge6e819ed048e4c4a4ee96fa6f426852c" title="Create a thread.">pthread_create()</a> service in order to set the attributes of a created thread.<p>
A <b>pthread_attr_t</b> object has to be initialized with <a class="el" href="group__posix__threadattr.html#g0b85ebb1e3aac081a4c0a5e85ae3cbe9" title="Initialize a thread attributes object.">pthread_attr_init()</a> first, which sets attributes to their default values, i.e. in kernel-space:<ul>
<li><em>detachstate</em> to PTHREAD_CREATE_JOINABLE,</li><li><em>stacksize</em> to PTHREAD_STACK_MIN,</li><li><em>inheritsched</em> to PTHREAD_EXPLICIT_SCHED,</li><li><em>schedpolicy</em> to SCHED_OTHER,</li><li><em>name</em> to NULL (only available in kernel-space),</li><li>scheduling priority to the minimum,</li><li>floating-point hardware enabled (only available in kernel-space),</li><li>processor affinity set to all available processors (only available as a thread attribute in kernel-space).</li></ul>
<p>
In user-space, the attributes and their defaults values are those documented by the underlying threading library (LinuxThreads or NPTL).
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g0b85ebb1e3aac081a4c0a5e85ae3cbe9">pthread_attr_init</a> (pthread_attr_t *attr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initialize a thread attributes object. <a href="#g0b85ebb1e3aac081a4c0a5e85ae3cbe9"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g4bcdbf47c17c7dcc51e9f05f5cb56d81">pthread_attr_destroy</a> (pthread_attr_t *attr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destroy a thread attributes object. <a href="#g4bcdbf47c17c7dcc51e9f05f5cb56d81"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g391c34da42e68ddd24f5ee0c070d5c4f">pthread_attr_getdetachstate</a> (const pthread_attr_t *attr, int *detachstate)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get detachstate attribute. <a href="#g391c34da42e68ddd24f5ee0c070d5c4f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#ge6ee78c307d8467b34a9b0c330993a54">pthread_attr_setdetachstate</a> (pthread_attr_t *attr, int detachstate)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set detachstate attribute. <a href="#ge6ee78c307d8467b34a9b0c330993a54"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#ge23600d4670359ab12bfba20db2c9a37">pthread_attr_getstacksize</a> (const pthread_attr_t *attr, size_t *stacksize)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get stacksize attribute. <a href="#ge23600d4670359ab12bfba20db2c9a37"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g812a9a455ae2ef2bb0dca4fff201a281">pthread_attr_setstacksize</a> (pthread_attr_t *attr, size_t stacksize)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set stacksize attribute. <a href="#g812a9a455ae2ef2bb0dca4fff201a281"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g79a77b688c30213e5e52e6be178cde4e">pthread_attr_getinheritsched</a> (const pthread_attr_t *attr, int *inheritsched)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get inheritsched attribute. <a href="#g79a77b688c30213e5e52e6be178cde4e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gd437fe8caa3ef9f0cb7d69f6f6479df9">pthread_attr_setinheritsched</a> (pthread_attr_t *attr, int inheritsched)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set inheritsched attribute. <a href="#gd437fe8caa3ef9f0cb7d69f6f6479df9"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gf032906f326f3c209c7eed6bb248ebee">pthread_attr_getschedpolicy</a> (const pthread_attr_t *attr, int *policy)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get schedpolicy attribute. <a href="#gf032906f326f3c209c7eed6bb248ebee"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g79b4c9e71486a87ef3014f1c660b33eb">pthread_attr_setschedpolicy</a> (pthread_attr_t *attr, int policy)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set schedpolicy attribute. <a href="#g79b4c9e71486a87ef3014f1c660b33eb"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g8b69613ee83bf326af4b15de5e00ec99">pthread_attr_getschedparam</a> (const pthread_attr_t *attr, struct sched_param *par)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get schedparam attribute. <a href="#g8b69613ee83bf326af4b15de5e00ec99"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gc7026e5a69f8e3a04b03b144392d4df1">pthread_attr_getschedparam_ex</a> (const pthread_attr_t *attr, struct sched_param_ex *par)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get schedparam_ex extended attribute. <a href="#gc7026e5a69f8e3a04b03b144392d4df1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g7d0bf4f0734aca888f89f7341b1df222">pthread_attr_setschedparam</a> (pthread_attr_t *attr, const struct sched_param *par)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set schedparam attribute. <a href="#g7d0bf4f0734aca888f89f7341b1df222"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g981dc55cf19905531309e6a51f0328c3">pthread_attr_setschedparam_ex</a> (pthread_attr_t *attr, const struct sched_param_ex *par)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set extended schedparam_ex attribute. <a href="#g981dc55cf19905531309e6a51f0328c3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gbfd252cd45081231018030e3878efa06">pthread_attr_getscope</a> (const pthread_attr_t *attr, int *scope)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get contention scope attribute. <a href="#gbfd252cd45081231018030e3878efa06"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g294aaacf59f34effeef978242cf08cbe">pthread_attr_setscope</a> (pthread_attr_t *attr, int scope)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set contention scope attribute. <a href="#g294aaacf59f34effeef978242cf08cbe"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gfa30efde4b455077e1b331b93dbd4e3e">pthread_attr_getname_np</a> (const pthread_attr_t *attr, const char **name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get name attribute. <a href="#gfa30efde4b455077e1b331b93dbd4e3e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g4d48205cba54fed0c96dfc0d184b9f88">pthread_attr_setname_np</a> (pthread_attr_t *attr, const char *name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set name attribute. <a href="#g4d48205cba54fed0c96dfc0d184b9f88"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#ga7f2f74cf814982e96418e09ccd2cd93">pthread_attr_getfp_np</a> (const pthread_attr_t *attr, int *fp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the floating point attribute. <a href="#ga7f2f74cf814982e96418e09ccd2cd93"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g3150cd7e9385c6a1b384fb5b515391f5">pthread_attr_setfp_np</a> (pthread_attr_t *attr, int fp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the floating point attribute. <a href="#g3150cd7e9385c6a1b384fb5b515391f5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#g8f4cd85d9237c8df2320dd386004ee00">pthread_attr_getaffinity_np</a> (const pthread_attr_t *attr, xnarch_cpumask_t *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the processor affinity attribute. <a href="#g8f4cd85d9237c8df2320dd386004ee00"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__posix__threadattr.html#gc79718c596b9cb0fdff961eede1f5995">pthread_attr_setaffinity_np</a> (pthread_attr_t *attr, xnarch_cpumask_t mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the processor affinity attribute. <a href="#gc79718c596b9cb0fdff961eede1f5995"></a><br></td></tr>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="g4bcdbf47c17c7dcc51e9f05f5cb56d81"></a><!-- doxytag: member="thread_attr.c::pthread_attr_destroy" ref="g4bcdbf47c17c7dcc51e9f05f5cb56d81" args="(pthread_attr_t *attr)" -->
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<td class="memname">int pthread_attr_destroy </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em> </td>
<td> ) </td>
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<p>
Destroy a thread attributes object.
<p>
This service invalidates the attribute object pointed to by <em>attr</em>. The object becomes invalid for all services (they all return EINVAL) except <a class="el" href="group__posix__threadattr.html#g0b85ebb1e3aac081a4c0a5e85ae3cbe9" title="Initialize a thread attributes object.">pthread_attr_init()</a>.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_destroy.html">Specification.</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="g8f4cd85d9237c8df2320dd386004ee00"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getaffinity_np" ref="g8f4cd85d9237c8df2320dd386004ee00" args="(const pthread_attr_t *attr, xnarch_cpumask_t *mask)" -->
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<td class="memname">int pthread_attr_getaffinity_np </td>
<td>(</td>
<td class="paramtype">const pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">xnarch_cpumask_t * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
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<p>
Get the processor affinity attribute.
<p>
This service stores, at the address <em>mask</em>, the value of the <em>affinity</em> attribute in the attribute object <em>attr</em>.<p>
The <em>affinity</em> attributes is a bitmask where bits set indicate processor where a thread created with the attribute <em>attr</em> may run. The least significant bit corresponds to the first logical processor.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>address where the value of the <em>affinity</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
</div>
</div><p>
<a class="anchor" name="g391c34da42e68ddd24f5ee0c070d5c4f"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getdetachstate" ref="g391c34da42e68ddd24f5ee0c070d5c4f" args="(const pthread_attr_t *attr, int *detachstate)" -->
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<td class="memname">int pthread_attr_getdetachstate </td>
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<td class="paramtype">const pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
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<td class="paramtype">int * </td>
<td class="paramname"> <em>detachstate</em></td><td> </td>
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<p>
Get detachstate attribute.
<p>
This service returns, at the address <em>detachstate</em>, the value of the <em>detachstate</em> attribute in the thread attribute object <em>attr</em>.<p>
Valid values of this attribute are PTHREAD_CREATE_JOINABLE and PTHREAD_CREATE_DETACHED. A detached thread is a thread which control block is automatically reclaimed when it terminates. The control block of a joinable thread, on the other hand, is only reclaimed when joined with the service <a class="el" href="group__posix__thread.html#ga79c99cc7b194918a2def257246f11c6" title="Wait for termination of a specified thread.">pthread_join()</a>.<p>
A thread that was created joinable may be detached after creation by using the <a class="el" href="group__posix__thread.html#g7c275c509c26566b6dd95a2de1668a2f" title="Detach a running thread.">pthread_detach()</a> service.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object</td></tr>
<tr><td valign="top"></td><td valign="top"><em>detachstate</em> </td><td>address where the value of the detachstate attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid;</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getdetachstate.html">Specification.</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="ga7f2f74cf814982e96418e09ccd2cd93"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getfp_np" ref="ga7f2f74cf814982e96418e09ccd2cd93" args="(const pthread_attr_t *attr, int *fp)" -->
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<td class="memname">int pthread_attr_getfp_np </td>
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<td class="paramtype">const pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
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<p>
Get the floating point attribute.
<p>
This service returns, at the address <em>fp</em>, the value of the <em>fp</em> attribute in the attribute object <em>attr</em>.<p>
The <em>fp</em> attribute is a boolean attribute indicating whether a thread created with the attribute <em>attr</em> may use floating-point hardware.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>fp</em> </td><td>address where the value of the <em>fp</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
</div>
</div><p>
<a class="anchor" name="g79a77b688c30213e5e52e6be178cde4e"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getinheritsched" ref="g79a77b688c30213e5e52e6be178cde4e" args="(const pthread_attr_t *attr, int *inheritsched)" -->
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<td class="paramtype">const pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
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Get inheritsched attribute.
<p>
This service returns at the address <em>inheritsched</em> the value of the <em>inheritsched</em> attribute in the attribute object <em>attr</em>.<p>
Threads created with this attribute set to PTHREAD_INHERIT_SCHED will use the same scheduling policy and priority as the thread calling <a class="el" href="group__posix__thread.html#ge6e819ed048e4c4a4ee96fa6f426852c" title="Create a thread.">pthread_create()</a>. Threads created with this attribute set to PTHREAD_EXPLICIT_SCHED will use the value of the <em>schedpolicy</em> attribute as scheduling policy, and the value of the <em>schedparam</em> attribute as scheduling priority.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>inheritsched</em> </td><td>address where the value of the <em>inheritsched</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getinheritsched.html">Specification.</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="gfa30efde4b455077e1b331b93dbd4e3e"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getname_np" ref="gfa30efde4b455077e1b331b93dbd4e3e" args="(const pthread_attr_t *attr, const char **name)" -->
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Get name attribute.
<p>
This service stores, at the address <em>name</em>, the value of the <em>name</em> attribute in the attribute object <em>attr</em>.<p>
The <em>name</em> attribute is the name under which a thread created with the attribute object <em>attr</em> will appear under /proc/xenomai/sched.<p>
The name returned by this function is only valid until the name is changed with <a class="el" href="group__posix__threadattr.html#g4d48205cba54fed0c96dfc0d184b9f88" title="Set name attribute.">pthread_attr_setname_np()</a> or the <em>attr</em> object is destroyed with <a class="el" href="group__posix__threadattr.html#g4bcdbf47c17c7dcc51e9f05f5cb56d81" title="Destroy a thread attributes object.">pthread_attr_destroy()</a>.<p>
If <em>name</em> is <em>NULL</em>, a unique default name will be used.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>name</em> </td><td>address where the value of the <em>name</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
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<a class="anchor" name="g8b69613ee83bf326af4b15de5e00ec99"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getschedparam" ref="g8b69613ee83bf326af4b15de5e00ec99" args="(const pthread_attr_t *attr, struct sched_param *par)" -->
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<p>
Get schedparam attribute.
<p>
This service stores, at the address <em>par</em>, the limited form of the <em>schedparam</em> attribute in the attribute object <em>attr</em>.<p>
The limited form only defines the <em>sched_priority</em> member, that is sufficent to hold the scheduling parameter for SCHED_FIFO, SCHED_RR and SCHED_OTHER class members. Threads created with <em>attr</em> will use the value of this attribute as a scheduling priority if the attribute <em>inheritsched</em> is set to PTHREAD_EXPLICIT_SCHED. Valid priorities range from 1 to 99.<p>
<a class="el" href="group__posix__threadattr.html#gc7026e5a69f8e3a04b03b144392d4df1" title="Get schedparam_ex extended attribute.">pthread_attr_getschedparam_ex()</a> should be used to retrieve the parameters for extended scheduling classes, such as SCHED_SPORADIC.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>par</em> </td><td>address where the value of the <em>schedparam</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getschedparam.html">Specification.</a> </dd></dl>
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<a class="anchor" name="gc7026e5a69f8e3a04b03b144392d4df1"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getschedparam_ex" ref="gc7026e5a69f8e3a04b03b144392d4df1" args="(const pthread_attr_t *attr, struct sched_param_ex *par)" -->
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<td class="paramname"> <em>par</em></td><td> </td>
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<p>
Get schedparam_ex extended attribute.
<p>
This service is an extended version of <a class="el" href="group__posix__threadattr.html#g8b69613ee83bf326af4b15de5e00ec99" title="Get schedparam attribute.">pthread_attr_getschedparam()</a>, that also supports Xenomai-specific or additional POSIX scheduling policies, which are not available with the host Linux environment.<p>
Typically, SCHED_SPORADIC parameters can be retrieved from this call.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>par</em> </td><td>address where the value of the extended <em>schedparam_ex</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getschedparam.html">Specification.</a> </dd></dl>
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<a class="anchor" name="gf032906f326f3c209c7eed6bb248ebee"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getschedpolicy" ref="gf032906f326f3c209c7eed6bb248ebee" args="(const pthread_attr_t *attr, int *policy)" -->
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<p>
Get schedpolicy attribute.
<p>
This service stores, at the address <em>policy</em>, the value of the <em>policy</em> attribute in the attribute object <em>attr</em>.<p>
Threads created with the attribute object <em>attr</em> use the value of this attribute as scheduling policy if the <em>inheritsched</em> attribute is set to PTHREAD_EXPLICIT_SCHED. The value of this attribute is one of SCHED_FIFO, SCHED_RR, SCHED_SPORADIC or SCHED_OTHER.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>policy</em> </td><td>address where the value of the <em>policy</em> attribute in the attribute object <em>attr</em> will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getschedpolicy.html">Specification.</a> </dd></dl>
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<a class="anchor" name="gbfd252cd45081231018030e3878efa06"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getscope" ref="gbfd252cd45081231018030e3878efa06" args="(const pthread_attr_t *attr, int *scope)" -->
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<td class="paramname"> <em>scope</em></td><td> </td>
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<p>
Get contention scope attribute.
<p>
This service stores, at the address <em>scope</em>, the value of the <em>scope</em> attribute in the attribute object <em>attr</em>.<p>
The <em>scope</em> attribute represents the scheduling contention scope of threads created with the attribute object <em>attr</em>. This implementation only supports the value PTHREAD_SCOPE_SYSTEM.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>scope</em> </td><td>address where the value of the <em>scope</em> attribute will be stored on sucess.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getscope.html">Specification.</a> </dd></dl>
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<a class="anchor" name="ge23600d4670359ab12bfba20db2c9a37"></a><!-- doxytag: member="thread_attr.c::pthread_attr_getstacksize" ref="ge23600d4670359ab12bfba20db2c9a37" args="(const pthread_attr_t *attr, size_t *stacksize)" -->
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<td></td>
<td class="paramtype">size_t * </td>
<td class="paramname"> <em>stacksize</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<p>
Get stacksize attribute.
<p>
This service stores, at the address <em>stacksize</em>, the value of the <em>stacksize</em> attribute in the attribute object <em>attr</em>.<p>
The <em>stacksize</em> attribute is used as the stack size of the threads created using the attribute object <em>attr</em>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>stacksize</em> </td><td>address where the value of the <em>stacksize</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_getstacksize.html">Specification.</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="g0b85ebb1e3aac081a4c0a5e85ae3cbe9"></a><!-- doxytag: member="thread_attr.c::pthread_attr_init" ref="g0b85ebb1e3aac081a4c0a5e85ae3cbe9" args="(pthread_attr_t *attr)" -->
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<td class="memname">int pthread_attr_init </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em> </td>
<td> ) </td>
<td></td>
</tr>
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<p>
Initialize a thread attributes object.
<p>
This service initializes the thread creation attributes structure pointed to by <em>attr</em>. Attributes are set to their default values (see <a class="el" href="group__posix__threadattr.html">Thread creation attributes.</a>).<p>
If this service is called specifying a thread attributes object that was already initialized, the attributes object is reinitialized.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>address of the thread attributes object to initialize.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0.</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_init.html">Specification.</a> </dd></dl>
<dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="rtcan__rtt_8c-example.html#a18">rtcan_rtt.c</a>.</dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
</div>
</div><p>
<a class="anchor" name="gc79718c596b9cb0fdff961eede1f5995"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setaffinity_np" ref="gc79718c596b9cb0fdff961eede1f5995" args="(pthread_attr_t *attr, xnarch_cpumask_t mask)" -->
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<td class="memname">int pthread_attr_setaffinity_np </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">xnarch_cpumask_t </td>
<td class="paramname"> <em>mask</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set the processor affinity attribute.
<p>
This service sets to <em>mask</em>, the value of the <em>affinity</em> attribute in the attribute object <em>attr</em>.<p>
The <em>affinity</em> attributes is a bitmask where bits set indicate processor where a thread created with the attribute <em>attr</em> may run. The least significant bit corresponds to the first logical processor.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>address where the value of the <em>affinity</em> attribute will be stored on success.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
</div>
</div><p>
<a class="anchor" name="ge6ee78c307d8467b34a9b0c330993a54"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setdetachstate" ref="ge6ee78c307d8467b34a9b0c330993a54" args="(pthread_attr_t *attr, int detachstate)" -->
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<td class="memname">int pthread_attr_setdetachstate </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>detachstate</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set detachstate attribute.
<p>
This service sets to <em>detachstate</em> the value of the <em>detachstate</em> attribute in the attribute object <em>attr</em>.<p>
Valid values of this attribute are PTHREAD_CREATE_JOINABLE and PTHREAD_CREATE_DETACHED. A detached thread is a thread which control block is automatically reclaimed when it terminates. The control block of a joinable thread, on the other hand, is only reclaimed when joined with the service <a class="el" href="group__posix__thread.html#ga79c99cc7b194918a2def257246f11c6" title="Wait for termination of a specified thread.">pthread_join()</a>.<p>
A thread that was created joinable may be detached after creation by using the <a class="el" href="group__posix__thread.html#g7c275c509c26566b6dd95a2de1668a2f" title="Detach a running thread.">pthread_detach()</a> service.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>detachstate</em> </td><td>value of the detachstate attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, the attribute object <em>attr</em> is invalid</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setdetachstate.html">Specification.</a> </dd></dl>
<dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="rtcan__rtt_8c-example.html#a19">rtcan_rtt.c</a>.</dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
</div>
</div><p>
<a class="anchor" name="g3150cd7e9385c6a1b384fb5b515391f5"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setfp_np" ref="g3150cd7e9385c6a1b384fb5b515391f5" args="(pthread_attr_t *attr, int fp)" -->
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<td class="memname">int pthread_attr_setfp_np </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>fp</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set the floating point attribute.
<p>
This service set to <em>fp</em>, the value of the <em>fp</em> attribute in the attribute object <em>attr</em>.<p>
The <em>fp</em> attribute is a boolean attribute indicating whether a thread created with the attribute <em>attr</em> may use floating-point hardware.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>fp</em> </td><td>value of the <em>fp</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
</div>
</div><p>
<a class="anchor" name="gd437fe8caa3ef9f0cb7d69f6f6479df9"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setinheritsched" ref="gd437fe8caa3ef9f0cb7d69f6f6479df9" args="(pthread_attr_t *attr, int inheritsched)" -->
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<td class="memname">int pthread_attr_setinheritsched </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>inheritsched</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set inheritsched attribute.
<p>
This service set to <em>inheritsched</em> the value of the <em>inheritsched</em> attribute in the attribute object <em>attr</em>.<p>
Threads created with this attribute set to PTHREAD_INHERIT_SCHED will use the same scheduling policy and priority as the thread calling <a class="el" href="group__posix__thread.html#ge6e819ed048e4c4a4ee96fa6f426852c" title="Create a thread.">pthread_create()</a>. Threads created with this attribute set to PTHREAD_EXPLICIT_SCHED will use the value of the <em>schedpolicy</em> attribute as scheduling policy, and the value of the <em>schedparam</em> attribute as scheduling priority.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>inheritsched</em> </td><td>value of the <em>inheritsched</em> attribute, PTHREAD_INHERIT_SCHED or PTHREAD_EXPLICIT_SCHED.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> or <em>inheritsched</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setinheritsched.html">Specification.</a> </dd></dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
</div>
</div><p>
<a class="anchor" name="g4d48205cba54fed0c96dfc0d184b9f88"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setname_np" ref="g4d48205cba54fed0c96dfc0d184b9f88" args="(pthread_attr_t *attr, const char *name)" -->
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<td class="memname">int pthread_attr_setname_np </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<p>
Set name attribute.
<p>
This service set to <em>name</em>, the value of the <em>name</em> attribute in the attribute object <em>attr</em>.<p>
The <em>name</em> attribute is the name under which a thread created with the attribute object <em>attr</em> will appear under /proc/xenomai/sched.<p>
If <em>name</em> is <em>NULL</em>, a unique default name will be used.<p>
This service is a non-portable extension of the POSIX interface.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>name</em> </td><td>value of the <em>name</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> is invalid;</li><li>ENOMEM, insufficient memory exists in the system heap to duplicate the name string, increase CONFIG_XENO_OPT_SYS_HEAPSZ.</li></ul>
</dd></dl>
<dl class="user" compact><dt><b>Valid contexts:</b></dt><dd><ul>
<li>kernel module initialization or cleanup routine;</li><li>Xenomai kernel-space thread. </li></ul>
</dd></dl>
</div>
</div><p>
<a class="anchor" name="g7d0bf4f0734aca888f89f7341b1df222"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setschedparam" ref="g7d0bf4f0734aca888f89f7341b1df222" args="(pthread_attr_t *attr, const struct sched_param *par)" -->
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<td class="memname">int pthread_attr_setschedparam </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const struct sched_param * </td>
<td class="paramname"> <em>par</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set schedparam attribute.
<p>
This service set to <em>par</em>, the limited form of the <em>schedparam</em> attribute in the attribute object <em>attr</em>.<p>
The limited form only defines the <em>sched_priority</em> member, that is sufficent to hold the scheduling parameter for SCHED_FIFO, SCHED_RR and SCHED_OTHER class members. Threads created with <em>attr</em> will use the value of this attribute as a scheduling priority if the attribute <em>inheritsched</em> is set to PTHREAD_EXPLICIT_SCHED. Valid priorities range from 1 to 99.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>par</em> </td><td>value of the <em>schedparam</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> or <em>par</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setschedparam.html">Specification.</a> </dd></dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
</div>
</div><p>
<a class="anchor" name="g981dc55cf19905531309e6a51f0328c3"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setschedparam_ex" ref="g981dc55cf19905531309e6a51f0328c3" args="(pthread_attr_t *attr, const struct sched_param_ex *par)" -->
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<td class="memname">int pthread_attr_setschedparam_ex </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const struct sched_param_ex * </td>
<td class="paramname"> <em>par</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set extended schedparam_ex attribute.
<p>
This service is an extended version of <a class="el" href="group__posix__threadattr.html#g7d0bf4f0734aca888f89f7341b1df222" title="Set schedparam attribute.">pthread_attr_setschedparam()</a>, that also supports Xenomai-specific or additional POSIX scheduling policies, which are not available with the host Linux environment.<p>
Typically, SCHED_SPORADIC parameters can be set using this call.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>par</em> </td><td>value of the <em>schedparam</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> or <em>par</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setschedparam.html">Specification.</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="g79b4c9e71486a87ef3014f1c660b33eb"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setschedpolicy" ref="g79b4c9e71486a87ef3014f1c660b33eb" args="(pthread_attr_t *attr, int policy)" -->
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<td class="memname">int pthread_attr_setschedpolicy </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>policy</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>
Set schedpolicy attribute.
<p>
This service set to <em>policy</em> the value of the <em>policy</em> attribute in the attribute object <em>attr</em>.<p>
Threads created with the attribute object <em>attr</em> use the value of this attribute as scheduling policy if the <em>inheritsched</em> attribute is set to PTHREAD_EXPLICIT_SCHED. The value of this attribute is one of SCHED_FIFO, SCHED_RR, SCHED_SPORADIC or SCHED_OTHER.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>policy</em> </td><td>value of the <em>policy</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> or <em>policy</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setschedpolicy.html">Specification.</a> </dd></dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
</div>
</div><p>
<a class="anchor" name="g294aaacf59f34effeef978242cf08cbe"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setscope" ref="g294aaacf59f34effeef978242cf08cbe" args="(pthread_attr_t *attr, int scope)" -->
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<td class="memname">int pthread_attr_setscope </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>scope</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
Set contention scope attribute.
<p>
This service set to <em>scope</em> the value of the <em>scope</em> attribute in the attribute object <em>attr</em>.<p>
The <em>scope</em> attribute represents the scheduling contention scope of threads created with the attribute object <em>attr</em>. This implementation only supports the value PTHREAD_SCOPE_SYSTEM.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>scope</em> </td><td>value of the <em>scope</em> attribute.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>ENOTSUP, <em>scope</em> is an unsupported value of the scope attribute.</li><li>EINVAL, <em>attr</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setscope.html">Specification.</a> </dd></dl>
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<a class="anchor" name="g812a9a455ae2ef2bb0dca4fff201a281"></a><!-- doxytag: member="thread_attr.c::pthread_attr_setstacksize" ref="g812a9a455ae2ef2bb0dca4fff201a281" args="(pthread_attr_t *attr, size_t stacksize)" -->
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<td class="memname">int pthread_attr_setstacksize </td>
<td>(</td>
<td class="paramtype">pthread_attr_t * </td>
<td class="paramname"> <em>attr</em>, </td>
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<td class="paramtype">size_t </td>
<td class="paramname"> <em>stacksize</em></td><td> </td>
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<p>
Set stacksize attribute.
<p>
This service set to <em>stacksize</em>, the value of the <em>stacksize</em> attribute in the attribute object <em>attr</em>.<p>
The <em>stacksize</em> attribute is used as the stack size of the threads created using the attribute object <em>attr</em>.<p>
The minimum value for this attribute is PTHREAD_STACK_MIN.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>attr</em> </td><td>attribute object;</td></tr>
<tr><td valign="top"></td><td valign="top"><em>stacksize</em> </td><td>value of the <em>stacksize</em> attribute.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success; <p>
an error number if:<ul>
<li>EINVAL, <em>attr</em> or <em>stacksize</em> is invalid.</li></ul>
</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a href="http://www.opengroup.org/onlinepubs/000095399/functions/pthread_attr_setstacksize.html">Specification.</a> </dd></dl>
<dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="rtcan__rtt_8c-example.html#a20">rtcan_rtt.c</a>.</dl>
<p>Referenced by <a class="el" href="src_2skins_2native_2task_8c-source.html#l00119">rt_task_create()</a>.</p>
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