+<h2>processor_set_policy_disable</h2>
+<hr>
+<p>
+<strong>Function</strong> - Disables a scheduling policy for a processor set.
+<h3>SYNOPSIS</h3>
+<pre>
+<strong>#include< mach/mach_host.h></strong>
+
+<strong>kern_return_t processor_set_policy_disable</strong>
+ <strong>(processor_set_t</strong> <var>processor_set</var>,
+ <strong>int</strong> <var>policy</var>,
+ <strong>boolean_t</strong> <var>change_threads</var><strong>);</strong>
+</pre>
+<h3>PARAMETERS</h3>
+<dl>
+<dt> <var>processor_set</var>
+<dd>
+[in processor-set-control port] The control port for the processor set for which a scheduling policy is to be disabled.
+<dt> <var>policy</var>
+<dd>
+[in scalar] Policy to be disabled. The values currently defined are POLICY_TIMESHARE and POLICY_FIXEDPRI.
+<dt> <var>change_threads</var>
+<dd>
+[in scalar] If true, causes the scheduling policy for all threads currently running with policy to POLICY_TIMESHARE.
+</dl>
+<h3>DESCRIPTION</h3>
+<p>
+The <strong>processor_set_policy_disable</strong>
+function restricts the set of scheduling policies allowed for
+<var>processor_set</var>. The set of scheduling policies allowed for a
+processor set is the set of policies allowed to be set for threads
+assigned to that processor set. The current set of permitted policies
+can be obtained from <strong>processor_set_info</strong>. Timesharing may
+not be forbidden for any processor set. This is a compromise to reduce
+the complexity of the assign operation; any thread whose
+<var>policy</var> is forbidden by its target processor set has its
+<var>policy</var> reset to timesharing. Disabling a scheduling
+<var>policy</var> for a processor set has no effect on threads
+currently assigned to that processor set unless
+<var>change_threads</var> is TRUE, in which case their policies will
+be reset to timesharing.
+<h3>RETURN VALUES</h3>
+<p>
+Only generic errors apply.
+<h3>RELATED INFORMATION</h3>
+<p>
+Functions:
+<a href="P_set_policy_enable.html">processor_set_policy_enable</a>,
+<a href="processor_set_info.html">processor_set_info</a>,
+<a href="thread_policy.html">thread_policy</a>.