1<h2>processor_set_policy_disable</h2> 2<hr> 3<p> 4<strong>Function</strong> - Disables a scheduling policy for a processor set. 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>#include< mach/mach_host.h></strong> 8 9<strong>kern_return_t processor_set_policy_disable</strong> 10 <strong>(processor_set_t</strong> <var>processor_set</var>, 11 <strong>int</strong> <var>policy</var>, 12 <strong>boolean_t</strong> <var>change_threads</var><strong>);</strong> 13</pre> 14<h3>PARAMETERS</h3> 15<dl> 16<dt> <var>processor_set</var> 17<dd> 18[in processor-set-control port] The control port for the processor set for which a scheduling policy is to be disabled. 19<dt> <var>policy</var> 20<dd> 21[in scalar] Policy to be disabled. The values currently defined are POLICY_TIMESHARE and POLICY_FIXEDPRI. 22<dt> <var>change_threads</var> 23<dd> 24[in scalar] If true, causes the scheduling policy for all threads currently running with policy to POLICY_TIMESHARE. 25</dl> 26<h3>DESCRIPTION</h3> 27<p> 28The <strong>processor_set_policy_disable</strong> 29function restricts the set of scheduling policies allowed for 30<var>processor_set</var>. The set of scheduling policies allowed for a 31processor set is the set of policies allowed to be set for threads 32assigned to that processor set. The current set of permitted policies 33can be obtained from <strong>processor_set_info</strong>. Timesharing may 34not be forbidden for any processor set. This is a compromise to reduce 35the complexity of the assign operation; any thread whose 36<var>policy</var> is forbidden by its target processor set has its 37<var>policy</var> reset to timesharing. Disabling a scheduling 38<var>policy</var> for a processor set has no effect on threads 39currently assigned to that processor set unless 40<var>change_threads</var> is TRUE, in which case their policies will 41be reset to timesharing. 42<h3>RETURN VALUES</h3> 43<p> 44Only generic errors apply. 45<h3>RELATED INFORMATION</h3> 46<p> 47Functions: 48<a href="P_set_policy_enable.html">processor_set_policy_enable</a>, 49<a href="processor_set_info.html">processor_set_info</a>, 50<a href="thread_policy.html">thread_policy</a>. 51