1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSImplClassicTask |
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5 | * |
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6 | * @brief This source file contains the implementation of |
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7 | * rtems_task_get_affinity(). |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 2014. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifdef HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <rtems/rtems/tasks.h> |
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24 | #include <rtems/score/threadimpl.h> |
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25 | #include <rtems/score/schedulerimpl.h> |
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26 | |
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27 | rtems_status_code rtems_task_get_affinity( |
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28 | rtems_id id, |
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29 | size_t cpusetsize, |
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30 | cpu_set_t *cpuset |
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31 | ) |
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32 | { |
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33 | Thread_Control *the_thread; |
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34 | ISR_lock_Context lock_context; |
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35 | Per_CPU_Control *cpu_self; |
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36 | bool ok; |
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37 | |
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38 | if ( cpuset == NULL ) { |
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39 | return RTEMS_INVALID_ADDRESS; |
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40 | } |
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41 | |
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42 | the_thread = _Thread_Get( id, &lock_context ); |
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43 | |
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44 | if ( the_thread == NULL ) { |
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45 | #if defined(RTEMS_MULTIPROCESSING) |
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46 | if ( _Thread_MP_Is_remote( id ) ) { |
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47 | return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; |
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48 | } |
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49 | #endif |
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50 | |
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51 | return RTEMS_INVALID_ID; |
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52 | } |
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53 | |
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54 | cpu_self = _Thread_Dispatch_disable_critical( &lock_context ); |
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55 | _Thread_State_acquire_critical( the_thread, &lock_context ); |
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56 | |
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57 | ok = _Scheduler_Get_affinity( |
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58 | the_thread, |
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59 | cpusetsize, |
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60 | cpuset |
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61 | ); |
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62 | |
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63 | _Thread_State_release( the_thread, &lock_context ); |
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64 | _Thread_Dispatch_enable( cpu_self ); |
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65 | return ok ? RTEMS_SUCCESSFUL : RTEMS_INVALID_NUMBER; |
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66 | } |
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