1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Attach Scheduler CBS Thread |
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5 | * @ingroup ScoreScheduler |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright (C) 2011 Petr Benes. |
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10 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/schedulercbsimpl.h> |
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22 | #include <rtems/score/threadimpl.h> |
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23 | |
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24 | int _Scheduler_CBS_Attach_thread ( |
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25 | Scheduler_CBS_Server_id server_id, |
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26 | rtems_id task_id |
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27 | ) |
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28 | { |
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29 | Scheduler_CBS_Server *server; |
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30 | ISR_lock_Context lock_context; |
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31 | Thread_Control *the_thread; |
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32 | Scheduler_CBS_Node *node; |
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33 | |
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34 | if ( server_id >= _Scheduler_CBS_Maximum_servers ) { |
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35 | return SCHEDULER_CBS_ERROR_INVALID_PARAMETER; |
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36 | } |
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37 | |
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38 | server = &_Scheduler_CBS_Server_list[ server_id ]; |
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39 | |
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40 | if ( !server->initialized ) { |
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41 | return SCHEDULER_CBS_ERROR_NOSERVER; |
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42 | } |
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43 | |
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44 | if ( server->task_id != -1 ) { |
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45 | return SCHEDULER_CBS_ERROR_FULL; |
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46 | } |
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47 | |
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48 | the_thread = _Thread_Get( task_id, &lock_context ); |
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49 | |
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50 | if ( the_thread == NULL ) { |
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51 | return SCHEDULER_CBS_ERROR_INVALID_PARAMETER; |
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52 | } |
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53 | |
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54 | node = _Scheduler_CBS_Thread_get_node( the_thread ); |
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55 | |
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56 | if ( node->cbs_server != NULL ) { |
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57 | _ISR_lock_ISR_enable( &lock_context ); |
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58 | return SCHEDULER_CBS_ERROR_FULL; |
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59 | } |
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60 | |
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61 | node->cbs_server = server; |
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62 | |
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63 | server->task_id = task_id; |
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64 | |
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65 | the_thread->budget_callout = _Scheduler_CBS_Budget_callout; |
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66 | the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT; |
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67 | the_thread->is_preemptible = true; |
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68 | |
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69 | _ISR_lock_ISR_enable( &lock_context ); |
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70 | return SCHEDULER_CBS_OK; |
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71 | } |
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