1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Gets Scheduling Policy and Parameters of Individual Threads |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * 13.5.2 Dynamic Thread Scheduling Parameters Access, |
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10 | * P1003.1c/Draft 10, p. 124 |
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11 | * |
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12 | * COPYRIGHT (c) 1989-2014. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * |
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15 | * The license and distribution terms for this file may be |
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16 | * found in the file LICENSE in this distribution or at |
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17 | * http://www.rtems.org/license/LICENSE. |
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18 | */ |
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19 | |
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20 | #if HAVE_CONFIG_H |
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21 | #include "config.h" |
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22 | #endif |
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23 | |
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24 | #include <pthread.h> |
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25 | #include <errno.h> |
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26 | |
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27 | #include <rtems/posix/pthreadimpl.h> |
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28 | #include <rtems/posix/pthreadattrimpl.h> |
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29 | #include <rtems/posix/priorityimpl.h> |
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30 | #include <rtems/score/schedulerimpl.h> |
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31 | #include <rtems/score/threadimpl.h> |
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32 | |
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33 | int pthread_getschedparam( |
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34 | pthread_t thread, |
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35 | int *policy, |
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36 | struct sched_param *param |
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37 | ) |
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38 | { |
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39 | Thread_Control *the_thread; |
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40 | Thread_queue_Context queue_context; |
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41 | Thread_CPU_budget_algorithms budget_algorithm; |
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42 | const Scheduler_Control *scheduler; |
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43 | Priority_Control priority; |
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44 | |
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45 | if ( policy == NULL || param == NULL ) { |
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46 | return EINVAL; |
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47 | } |
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48 | |
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49 | _Thread_queue_Context_initialize( &queue_context ); |
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50 | the_thread = _Thread_Get( thread, &queue_context.Lock_context.Lock_context ); |
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51 | |
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52 | if ( the_thread == NULL ) { |
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53 | return ESRCH; |
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54 | } |
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55 | |
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56 | _Thread_Wait_acquire_critical( the_thread, &queue_context ); |
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57 | |
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58 | scheduler = _Thread_Scheduler_get_home( the_thread ); |
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59 | _POSIX_Threads_Get_sched_param_sporadic( the_thread, scheduler, param ); |
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60 | priority = the_thread->Real_priority.priority; |
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61 | budget_algorithm = the_thread->budget_algorithm; |
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62 | |
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63 | _Thread_Wait_release( the_thread, &queue_context ); |
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64 | |
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65 | param->sched_priority = _POSIX_Priority_From_core( scheduler, priority ); |
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66 | *policy = _POSIX_Thread_Translate_to_sched_policy( budget_algorithm ); |
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67 | return 0; |
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68 | } |
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