1<h2>thread_policy</h2> 2<hr> 3<p> 4<strong>Function</strong> - Set target thread's scheduling policy state. 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>kern_return_t thread_policy</strong> 8 <strong>(thread_act_t</strong> <var>thread</var>, 9 <strong>policy_t</strong> <var>policy</var>, 10 <strong>policy_base_t</strong> <var>base</var>, 11 <strong>base</strong> <var>base_count</var>, 12 <strong>boolean_t</strong> <var>set_limit</var><strong>);</strong> 13</pre> 14<h3>PARAMETERS</h3> 15<dl> 16<p> 17<dt> <var>thread</var> 18<dd> 19[in thread send right] 20The thread scheduling policy is to be set. 21<p> 22<dt> <var>policy</var> 23<dd> 24[in scalar] 25Policy to be set. The values currently defined are <strong>POLICY_TIMESHARE</strong>, 26<strong>POLICY_RR</strong> (round robin) and <strong>POLICY_FIFO</strong> (firstin, first-out). 27<p> 28<dt> <var>base</var> 29<dd> 30[pointer to in structure] 31Base scheduling policy specific data, 32<strong>policy_fifo_base</strong>, <strong>policy_rr_base</strong> or <strong>policy_timeshare_base</strong>. 33<p> 34<dt> <var>base_count</var> 35<dd> 36[in scalar] 37The size of the buffer (in natural-sized units). 38<p> 39<dt> <var>set_limit</var> 40<dd> 41[in scalar] 42True if the thread's scheduling limits should be restricted to 43allow no more service than specified by <var>base</var>. 44</dl> 45<h3>DESCRIPTION</h3> 46<p> 47The <strong>thread_policy</strong> function sets the scheduling policy 48to be applied to thread. <var>policy</var> must be a scheduling policy 49currently "enabled" for the thread's assigned processor set. 50<h3>RETURN VALUES</h3> 51<dl> 52<p> 53<dt> <strong>KERN_INVALID_POLICY</strong> 54<dd> 55The processor set to which <var>thread</var> is currently assigned does 56not currently enable <var>policy</var>. 57<p> 58<dt> <strong>KERN_POLICY_LIMIT</strong> 59<dd> 60The specified scheduling attributes exceeds the thread's limits. 61</dl> 62<h3>RELATED INFORMATION</h3> 63<p> 64Functions: 65<a href="P_set_policy_control.html"><strong>processor_set_policy_control</strong></a>, 66<a href="thread_set_policy.html"><strong>thread_set_policy</strong></a>, 67<a href="task_policy.html"><strong>task_policy</strong></a>, 68<a href="task_set_policy.html"><strong>task_set_policy</strong></a>. 69<p> 70Data Structures: 71<a href="policy_fifo_info.html"><strong>policy_fifo_info</strong></a>, 72<a href="policy_rr_info.html"><strong>policy_rr_info</strong></a>, 73<a href="policy_timeshare_info.html"><strong>policy_timeshare_info</strong></a>. 74