1 | /* |
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2 | * Copyright (c) 2014, 2017 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/score/schedulerimpl.h> |
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20 | |
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21 | bool _Scheduler_Set_affinity( |
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22 | Thread_Control *the_thread, |
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23 | size_t cpusetsize, |
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24 | const cpu_set_t *cpuset |
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25 | ) |
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26 | { |
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27 | Processor_mask affinity; |
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28 | Processor_mask_Copy_status status; |
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29 | const Scheduler_Control *scheduler; |
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30 | Scheduler_Node *node; |
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31 | ISR_lock_Context lock_context; |
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32 | bool ok; |
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33 | |
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34 | status = _Processor_mask_From_cpu_set_t( &affinity, cpusetsize, cpuset ); |
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35 | if ( !_Processor_mask_Is_at_most_partial_loss( status ) ) { |
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36 | return false; |
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37 | } |
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38 | |
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39 | /* |
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40 | * Reduce affinity set to the online processors to be in line with |
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41 | * _Thread_Initialize() which sets the default affinity to the set of online |
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42 | * processors. |
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43 | */ |
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44 | _Processor_mask_And( &affinity, _SMP_Get_online_processors(), &affinity ); |
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45 | |
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46 | scheduler = _Thread_Scheduler_get_home( the_thread ); |
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47 | _Scheduler_Acquire_critical( scheduler, &lock_context ); |
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48 | |
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49 | node = _Thread_Scheduler_get_home_node( the_thread ); |
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50 | #if defined(RTEMS_SMP) |
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51 | ok = ( *scheduler->Operations.set_affinity )( |
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52 | scheduler, |
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53 | the_thread, |
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54 | node, |
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55 | &affinity |
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56 | ); |
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57 | |
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58 | if ( ok ) { |
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59 | _Processor_mask_Assign( &the_thread->Scheduler.Affinity, &affinity ); |
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60 | } |
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61 | #else |
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62 | ok = _Scheduler_default_Set_affinity_body( |
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63 | scheduler, |
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64 | the_thread, |
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65 | node, |
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66 | &affinity |
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67 | ); |
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68 | #endif |
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69 | |
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70 | _Scheduler_Release_critical( scheduler, &lock_context ); |
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71 | return ok; |
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72 | } |
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