1 | /* |
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2 | * Copyright (c) 2016 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/threadimpl.h> |
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20 | #include <rtems/score/schedulerimpl.h> |
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21 | |
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22 | #if defined(RTEMS_SMP) |
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23 | void _Thread_Scheduler_process_requests( Thread_Control *the_thread ) |
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24 | { |
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25 | ISR_lock_Context lock_context; |
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26 | Scheduler_Node *scheduler_node; |
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27 | |
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28 | _Thread_Scheduler_acquire_critical( the_thread, &lock_context ); |
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29 | |
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30 | scheduler_node = the_thread->Scheduler.requests; |
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31 | |
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32 | if ( scheduler_node != NULL ) { |
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33 | Scheduler_Node *next; |
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34 | Scheduler_Node *remove; |
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35 | |
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36 | the_thread->Scheduler.requests = NULL; |
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37 | remove = NULL; |
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38 | |
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39 | do { |
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40 | Scheduler_Node_request request; |
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41 | |
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42 | request = scheduler_node->Thread.request; |
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43 | scheduler_node->Thread.request = SCHEDULER_NODE_REQUEST_NOT_PENDING; |
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44 | |
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45 | next = scheduler_node->Thread.next_request; |
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46 | #if defined(RTEMS_DEBUG) |
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47 | scheduler_node->Thread.next_request = NULL; |
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48 | #endif |
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49 | |
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50 | if ( request == SCHEDULER_NODE_REQUEST_ADD ) { |
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51 | ++the_thread->Scheduler.helping_nodes; |
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52 | _Chain_Append_unprotected( |
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53 | &the_thread->Scheduler.Scheduler_nodes, |
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54 | &scheduler_node->Thread.Scheduler_node.Chain |
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55 | ); |
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56 | } else if ( request == SCHEDULER_NODE_REQUEST_REMOVE ) { |
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57 | --the_thread->Scheduler.helping_nodes; |
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58 | _Chain_Extract_unprotected( |
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59 | &scheduler_node->Thread.Scheduler_node.Chain |
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60 | ); |
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61 | scheduler_node->Thread.Scheduler_node.next = remove; |
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62 | remove = scheduler_node; |
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63 | } else { |
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64 | _Assert( request == SCHEDULER_NODE_REQUEST_NOTHING ); |
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65 | } |
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66 | |
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67 | scheduler_node = next; |
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68 | } while ( scheduler_node != NULL ); |
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69 | |
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70 | _Thread_Scheduler_release_critical( the_thread, &lock_context ); |
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71 | |
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72 | scheduler_node = remove; |
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73 | |
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74 | while ( scheduler_node != NULL ) { |
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75 | const Scheduler_Control *scheduler; |
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76 | ISR_lock_Context lock_context; |
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77 | |
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78 | next = scheduler_node->Thread.Scheduler_node.next; |
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79 | #if defined(RTEMS_DEBUG) |
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80 | scheduler_node->Thread.Scheduler_node.next = NULL; |
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81 | #endif |
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82 | |
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83 | scheduler = _Scheduler_Node_get_scheduler( scheduler_node ); |
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84 | |
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85 | _Scheduler_Acquire_critical( scheduler, &lock_context ); |
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86 | ( *scheduler->Operations.withdraw_node )( |
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87 | scheduler, |
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88 | the_thread, |
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89 | scheduler_node, |
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90 | THREAD_SCHEDULER_READY |
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91 | ); |
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92 | _Scheduler_Release_critical( scheduler, &lock_context ); |
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93 | |
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94 | scheduler_node = next; |
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95 | } |
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96 | } else { |
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97 | _Thread_Scheduler_release_critical( the_thread, &lock_context ); |
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98 | } |
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99 | } |
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100 | #endif |
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