xnu-7195.60.75.tar.gz

[apple/xnu.git] / osfmk / man / thread_set_state.html

<h2>thread_set_state</h2>
<hr>
<p>
<strong>Function</strong> - Set the target thread's user-mode execution state.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   thread_set_state</strong>
                <strong>(thread_act_t</strong>                     <var>target_thread</var>,
                 <strong>thread_state_flavor_t</strong>                   <var>flavor</var>,
                 <strong>thread_state_t</strong>                       <var>new_state</var>,
                 <strong>target_thread</strong>                  <var>new_state_count</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>target_thread</var> 
<dd>
[in thread send right]
The thread for which to set the execution state. 
The calling thread cannot specify itself.
<p>
<dt> <var>flavor</var> 
<dd>
[in scalar]
The type of state to set.  Valid values correspond to
supported machine architecture features.
<p>
<dt> <var>new_state</var> 
<dd>
[pointer to in structure]
State information for the specified thread.
<p>
<dt> <var>new_state_count</var> 
<dd>
[in scalar]
The size of the buffer (in natural-sized units).
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>thread_set_state</strong> function sets the execution state
(for example, the
machine registers) for <var>target_thread</var>.  <var>flavor</var> specifies the type
of state to set.
<p>
The format of the state to set is machine specific; it is defined in
<strong>mach/thread_status.h</strong>.
<h3>RETURN VALUES</h3>
<p>
Only generic errors apply.
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="task_info.html"><strong>task_info</strong></a>,
<a href="thread_get_state.html"><strong>thread_get_state</strong></a>,
<a href="thread_info.html"><strong>thread_info</strong></a>.