1<h2>task_set_policy</h2> 2<hr> 3<p> 4<strong>Function</strong> - Set target task's default scheduling policy state. (Protected Interface.) 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>kern_return_t task_set_policy</strong> 8 <strong>(task_t</strong> <var>task</var>, 9 <strong>processor_set_t</strong> <var>processor_set</var>, 10 <strong>policy_t</strong> <var>policy</var>, 11 <strong>policy_base_t</strong> <var>base</var>, 12 <strong>mach_msg_type_number_t</strong> <var>base_count</var>, 13 <strong>policy_limit_t</strong> <var>limit</var>, 14 <strong>mach_msg_type_number_t</strong> <var>limit_count</var>, 15 <strong>boolean_t</strong> <var>change_threads</var><strong>);</strong> 16</pre> 17<h3>PARAMETERS</h3> 18<dl> 19<dt> <var>task</var> 20<dd> 21[in task send right] 22The task whose scheduling policy is to be set. 23<dt> <var>processor_set</var> 24<dd> 25[in processor-set-control send right] 26The control port for the processor 27set to which the task is currently assigned. 28<dt> <var>policy</var> 29<dd> 30[in scalar] 31Policy to be set. The values currently defined are <strong>POLICY_TIMESHARE</strong>, 32<strong>POLICY_RR</strong> (round robin) and <strong>POLICY_FIFO</strong> (firstin, first-out). 33<dt> <var>base</var> 34<dd> 35[pointer to in structure] 36Base policy specific data, <strong>policy_fifo_base</strong>, 37<strong>policy_rr_base</strong> or <strong>policy_timeshare_base</strong>. 38<dt> <var>base_count</var> 39<dd> 40[in scalar] 41The size of the buffer (in natural-sized units). 42<dt> <var>limit</var> 43<dd> 44[pointer to in structure] 45Policy specific limits, <strong>policy_fifo_limit</strong>, 46<strong>policy_rr_limit</strong> or <strong>policy_timeshare_limit</strong>. 47<dt> <var>limit_count</var> 48<dd> 49[in scalar] 50The size of the buffer (in natural-sized units). 51<dt> <var>change_threads</var> 52<dd> 53[in scalar] 54True if the scheduling attributes for all contained threads 55should be changed as well. 56</dl> 57<h3>DESCRIPTION</h3> 58<p> 59The <strong>task_set_policy</strong> function sets the scheduling attributes, 60both base and limit, for <var>task</var>. 61<var>policy</var> may be any policy implemented by the processor set whether or 62not it is enabled. 63<h3>RETURN VALUES</h3> 64<dl> 65<dt> <strong>KERN_INVALID_PROCESSOR_SET</strong> 66<dd> 67<var>processor_set</var> is not the task's processor set control port. 68</dl> 69<h3>RELATED INFORMATION</h3> 70<p> 71Functions: 72<a href="P_set_policy_control.html"><strong>processor_set_policy_control</strong></a>, 73<a href="thread_policy.html"><strong>thread_policy</strong></a>, 74<a href="thread_set_policy.html"><strong>thread_set_policy</strong></a>, 75<a href="task_policy.html"><strong>task_policy</strong></a>. 76<p> 77Data Structures: 78<a href="policy_fifo_info.html"><strong>policy_fifo_info</strong></a>, 79<a href="policy_rr_info.html"><strong>policy_rr_info</strong></a>, 80<a href="policy_timeshare_info.html"><strong>policy_timeshare_info</strong></a>. 81