1*c54f35caSApple OSS Distributions<h2>thread_policy</h2> 2*c54f35caSApple OSS Distributions<hr> 3*c54f35caSApple OSS Distributions<p> 4*c54f35caSApple OSS Distributions<strong>Function</strong> - Set target thread's scheduling policy state. 5*c54f35caSApple OSS Distributions<h3>SYNOPSIS</h3> 6*c54f35caSApple OSS Distributions<pre> 7*c54f35caSApple OSS Distributions<strong>kern_return_t thread_policy</strong> 8*c54f35caSApple OSS Distributions <strong>(thread_act_t</strong> <var>thread</var>, 9*c54f35caSApple OSS Distributions <strong>policy_t</strong> <var>policy</var>, 10*c54f35caSApple OSS Distributions <strong>policy_base_t</strong> <var>base</var>, 11*c54f35caSApple OSS Distributions <strong>base</strong> <var>base_count</var>, 12*c54f35caSApple OSS Distributions <strong>boolean_t</strong> <var>set_limit</var><strong>);</strong> 13*c54f35caSApple OSS Distributions</pre> 14*c54f35caSApple OSS Distributions<h3>PARAMETERS</h3> 15*c54f35caSApple OSS Distributions<dl> 16*c54f35caSApple OSS Distributions<p> 17*c54f35caSApple OSS Distributions<dt> <var>thread</var> 18*c54f35caSApple OSS Distributions<dd> 19*c54f35caSApple OSS Distributions[in thread send right] 20*c54f35caSApple OSS DistributionsThe thread scheduling policy is to be set. 21*c54f35caSApple OSS Distributions<p> 22*c54f35caSApple OSS Distributions<dt> <var>policy</var> 23*c54f35caSApple OSS Distributions<dd> 24*c54f35caSApple OSS Distributions[in scalar] 25*c54f35caSApple OSS DistributionsPolicy to be set. The values currently defined are <strong>POLICY_TIMESHARE</strong>, 26*c54f35caSApple OSS Distributions<strong>POLICY_RR</strong> (round robin) and <strong>POLICY_FIFO</strong> (firstin, first-out). 27*c54f35caSApple OSS Distributions<p> 28*c54f35caSApple OSS Distributions<dt> <var>base</var> 29*c54f35caSApple OSS Distributions<dd> 30*c54f35caSApple OSS Distributions[pointer to in structure] 31*c54f35caSApple OSS DistributionsBase scheduling policy specific data, 32*c54f35caSApple OSS Distributions<strong>policy_fifo_base</strong>, <strong>policy_rr_base</strong> or <strong>policy_timeshare_base</strong>. 33*c54f35caSApple OSS Distributions<p> 34*c54f35caSApple OSS Distributions<dt> <var>base_count</var> 35*c54f35caSApple OSS Distributions<dd> 36*c54f35caSApple OSS Distributions[in scalar] 37*c54f35caSApple OSS DistributionsThe size of the buffer (in natural-sized units). 38*c54f35caSApple OSS Distributions<p> 39*c54f35caSApple OSS Distributions<dt> <var>set_limit</var> 40*c54f35caSApple OSS Distributions<dd> 41*c54f35caSApple OSS Distributions[in scalar] 42*c54f35caSApple OSS DistributionsTrue if the thread's scheduling limits should be restricted to 43*c54f35caSApple OSS Distributionsallow no more service than specified by <var>base</var>. 44*c54f35caSApple OSS Distributions</dl> 45*c54f35caSApple OSS Distributions<h3>DESCRIPTION</h3> 46*c54f35caSApple OSS Distributions<p> 47*c54f35caSApple OSS DistributionsThe <strong>thread_policy</strong> function sets the scheduling policy 48*c54f35caSApple OSS Distributionsto be applied to thread. <var>policy</var> must be a scheduling policy 49*c54f35caSApple OSS Distributionscurrently "enabled" for the thread's assigned processor set. 50*c54f35caSApple OSS Distributions<h3>RETURN VALUES</h3> 51*c54f35caSApple OSS Distributions<dl> 52*c54f35caSApple OSS Distributions<p> 53*c54f35caSApple OSS Distributions<dt> <strong>KERN_INVALID_POLICY</strong> 54*c54f35caSApple OSS Distributions<dd> 55*c54f35caSApple OSS DistributionsThe processor set to which <var>thread</var> is currently assigned does 56*c54f35caSApple OSS Distributionsnot currently enable <var>policy</var>. 57*c54f35caSApple OSS Distributions<p> 58*c54f35caSApple OSS Distributions<dt> <strong>KERN_POLICY_LIMIT</strong> 59*c54f35caSApple OSS Distributions<dd> 60*c54f35caSApple OSS DistributionsThe specified scheduling attributes exceeds the thread's limits. 61*c54f35caSApple OSS Distributions</dl> 62*c54f35caSApple OSS Distributions<h3>RELATED INFORMATION</h3> 63*c54f35caSApple OSS Distributions<p> 64*c54f35caSApple OSS DistributionsFunctions: 65*c54f35caSApple OSS Distributions<a href="P_set_policy_control.html"><strong>processor_set_policy_control</strong></a>, 66*c54f35caSApple OSS Distributions<a href="thread_set_policy.html"><strong>thread_set_policy</strong></a>, 67*c54f35caSApple OSS Distributions<a href="task_policy.html"><strong>task_policy</strong></a>, 68*c54f35caSApple OSS Distributions<a href="task_set_policy.html"><strong>task_set_policy</strong></a>. 69*c54f35caSApple OSS Distributions<p> 70*c54f35caSApple OSS DistributionsData Structures: 71*c54f35caSApple OSS Distributions<a href="policy_fifo_info.html"><strong>policy_fifo_info</strong></a>, 72*c54f35caSApple OSS Distributions<a href="policy_rr_info.html"><strong>policy_rr_info</strong></a>, 73*c54f35caSApple OSS Distributions<a href="policy_timeshare_info.html"><strong>policy_timeshare_info</strong></a>. 74