[981eed2] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @ingroup ScoreSchedulerStrongAPA |
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| 5 | * |
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| 6 | * @brief Strong APA Scheduler Implementation |
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| 7 | */ |
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| 8 | |
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| 9 | /* |
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| 10 | * Copyright (c) 2013, 2016 embedded brains GmbH. All rights reserved. |
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| 11 | * |
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| 12 | * embedded brains GmbH |
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| 13 | * Dornierstr. 4 |
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| 14 | * 82178 Puchheim |
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| 15 | * Germany |
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| 16 | * <rtems@embedded-brains.de> |
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| 17 | * |
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| 18 | * The license and distribution terms for this file may be |
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| 19 | * found in the file LICENSE in this distribution or at |
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| 20 | * http://www.rtems.org/license/LICENSE. |
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| 21 | */ |
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| 22 | |
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| 23 | #if HAVE_CONFIG_H |
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| 24 | #include "config.h" |
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| 25 | #endif |
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| 26 | |
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| 27 | #include <rtems/score/schedulerstrongapa.h> |
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| 28 | #include <rtems/score/schedulerpriorityimpl.h> |
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| 29 | #include <rtems/score/schedulersmpimpl.h> |
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| 30 | |
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| 31 | static Scheduler_strong_APA_Context *_Scheduler_strong_APA_Get_self( |
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| 32 | Scheduler_Context *context |
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| 33 | ) |
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| 34 | { |
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| 35 | return (Scheduler_strong_APA_Context *) context; |
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| 36 | } |
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| 37 | |
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| 38 | static Scheduler_strong_APA_Node * |
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| 39 | _Scheduler_strong_APA_Node_downcast( Scheduler_Node *node ) |
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| 40 | { |
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| 41 | return (Scheduler_strong_APA_Node *) node; |
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| 42 | } |
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| 43 | |
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| 44 | static void _Scheduler_strong_APA_Move_from_scheduled_to_ready( |
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| 45 | Scheduler_Context *context, |
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| 46 | Scheduler_Node *scheduled_to_ready |
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| 47 | ) |
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| 48 | { |
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| 49 | Scheduler_strong_APA_Context *self = |
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| 50 | _Scheduler_strong_APA_Get_self( context ); |
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| 51 | Scheduler_strong_APA_Node *node = |
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| 52 | _Scheduler_strong_APA_Node_downcast( scheduled_to_ready ); |
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| 53 | |
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| 54 | _Chain_Extract_unprotected( &node->Base.Base.Node ); |
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| 55 | _Scheduler_priority_Ready_queue_enqueue_first( |
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| 56 | &node->Base.Base.Node, |
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| 57 | &node->Ready_queue, |
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| 58 | &self->Bit_map |
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| 59 | ); |
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| 60 | } |
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| 61 | |
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| 62 | static void _Scheduler_strong_APA_Move_from_ready_to_scheduled( |
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| 63 | Scheduler_Context *context, |
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| 64 | Scheduler_Node *ready_to_scheduled |
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| 65 | ) |
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| 66 | { |
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| 67 | Scheduler_strong_APA_Context *self = |
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| 68 | _Scheduler_strong_APA_Get_self( context ); |
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| 69 | Scheduler_strong_APA_Node *node = |
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| 70 | _Scheduler_strong_APA_Node_downcast( ready_to_scheduled ); |
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| 71 | |
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| 72 | _Scheduler_priority_Ready_queue_extract( |
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| 73 | &node->Base.Base.Node, |
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| 74 | &node->Ready_queue, |
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| 75 | &self->Bit_map |
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| 76 | ); |
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| 77 | _Chain_Insert_ordered_unprotected( |
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| 78 | &self->Base.Scheduled, |
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| 79 | &node->Base.Base.Node, |
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| 80 | _Scheduler_SMP_Insert_priority_fifo_order |
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| 81 | ); |
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| 82 | } |
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| 83 | |
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| 84 | static void _Scheduler_strong_APA_Insert_ready_lifo( |
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| 85 | Scheduler_Context *context, |
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| 86 | Scheduler_Node *the_thread |
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| 87 | ) |
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| 88 | { |
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| 89 | Scheduler_strong_APA_Context *self = |
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| 90 | _Scheduler_strong_APA_Get_self( context ); |
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| 91 | Scheduler_strong_APA_Node *node = |
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| 92 | _Scheduler_strong_APA_Node_downcast( the_thread ); |
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| 93 | |
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| 94 | _Scheduler_priority_Ready_queue_enqueue( |
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| 95 | &node->Base.Base.Node, |
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| 96 | &node->Ready_queue, |
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| 97 | &self->Bit_map |
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| 98 | ); |
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| 99 | } |
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| 100 | |
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| 101 | static void _Scheduler_strong_APA_Insert_ready_fifo( |
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| 102 | Scheduler_Context *context, |
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| 103 | Scheduler_Node *the_thread |
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| 104 | ) |
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| 105 | { |
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| 106 | Scheduler_strong_APA_Context *self = |
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| 107 | _Scheduler_strong_APA_Get_self( context ); |
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| 108 | Scheduler_strong_APA_Node *node = |
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| 109 | _Scheduler_strong_APA_Node_downcast( the_thread ); |
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| 110 | |
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| 111 | _Scheduler_priority_Ready_queue_enqueue_first( |
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| 112 | &node->Base.Base.Node, |
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| 113 | &node->Ready_queue, |
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| 114 | &self->Bit_map |
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| 115 | ); |
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| 116 | } |
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| 117 | |
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| 118 | static void _Scheduler_strong_APA_Extract_from_ready( |
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| 119 | Scheduler_Context *context, |
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| 120 | Scheduler_Node *the_thread |
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| 121 | ) |
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| 122 | { |
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| 123 | Scheduler_strong_APA_Context *self = |
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| 124 | _Scheduler_strong_APA_Get_self( context ); |
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| 125 | Scheduler_strong_APA_Node *node = |
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| 126 | _Scheduler_strong_APA_Node_downcast( the_thread ); |
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| 127 | |
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| 128 | _Scheduler_priority_Ready_queue_extract( |
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| 129 | &node->Base.Base.Node, |
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| 130 | &node->Ready_queue, |
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| 131 | &self->Bit_map |
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| 132 | ); |
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| 133 | } |
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| 134 | |
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| 135 | static void _Scheduler_strong_APA_Do_update( |
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| 136 | Scheduler_Context *context, |
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| 137 | Scheduler_Node *node_to_update, |
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| 138 | Priority_Control new_priority |
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| 139 | ) |
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| 140 | { |
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| 141 | Scheduler_strong_APA_Context *self = |
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| 142 | _Scheduler_strong_APA_Get_self( context ); |
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| 143 | Scheduler_strong_APA_Node *node = |
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| 144 | _Scheduler_strong_APA_Node_downcast( node_to_update ); |
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| 145 | |
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| 146 | _Scheduler_SMP_Node_update_priority( &node->Base, new_priority ); |
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| 147 | _Scheduler_priority_Ready_queue_update( |
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| 148 | &node->Ready_queue, |
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| 149 | new_priority, |
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| 150 | &self->Bit_map, |
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| 151 | &self->Ready[ 0 ] |
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| 152 | ); |
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| 153 | } |
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| 154 | |
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| 155 | static Scheduler_strong_APA_Context * |
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| 156 | _Scheduler_strong_APA_Get_context( const Scheduler_Control *scheduler ) |
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| 157 | { |
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| 158 | return (Scheduler_strong_APA_Context *) _Scheduler_Get_context( scheduler ); |
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| 159 | } |
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| 160 | |
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| 161 | void _Scheduler_strong_APA_Initialize( const Scheduler_Control *scheduler ) |
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| 162 | { |
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| 163 | Scheduler_strong_APA_Context *self = |
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| 164 | _Scheduler_strong_APA_Get_context( scheduler ); |
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| 165 | |
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| 166 | _Scheduler_SMP_Initialize( &self->Base ); |
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| 167 | _Priority_bit_map_Initialize( &self->Bit_map ); |
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[042072b] | 168 | _Scheduler_priority_Ready_queue_initialize( |
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| 169 | &self->Ready[ 0 ], |
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| 170 | scheduler->maximum_priority |
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| 171 | ); |
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[981eed2] | 172 | } |
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| 173 | |
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| 174 | void _Scheduler_strong_APA_Node_initialize( |
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| 175 | const Scheduler_Control *scheduler, |
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[df2177ab] | 176 | Scheduler_Node *node, |
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[981eed2] | 177 | Thread_Control *the_thread, |
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[9bfad8c] | 178 | Priority_Control priority |
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[981eed2] | 179 | ) |
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| 180 | { |
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[9bfad8c] | 181 | Scheduler_Context *context; |
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| 182 | Scheduler_strong_APA_Context *self; |
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[df2177ab] | 183 | Scheduler_strong_APA_Node *the_node; |
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| 184 | |
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| 185 | the_node = _Scheduler_strong_APA_Node_downcast( node ); |
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[300f6a48] | 186 | _Scheduler_SMP_Node_initialize( |
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| 187 | scheduler, |
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| 188 | &the_node->Base, |
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| 189 | the_thread, |
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| 190 | priority |
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| 191 | ); |
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[9bfad8c] | 192 | |
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| 193 | context = _Scheduler_Get_context( scheduler ); |
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| 194 | self = _Scheduler_strong_APA_Get_self( context ); |
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| 195 | _Scheduler_priority_Ready_queue_update( |
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[df2177ab] | 196 | &the_node->Ready_queue, |
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[9bfad8c] | 197 | priority, |
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| 198 | &self->Bit_map, |
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| 199 | &self->Ready[ 0 ] |
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| 200 | ); |
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[981eed2] | 201 | } |
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| 202 | |
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| 203 | static Scheduler_Node *_Scheduler_strong_APA_Get_highest_ready( |
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| 204 | Scheduler_Context *context, |
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| 205 | Scheduler_Node *node |
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| 206 | ) |
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| 207 | { |
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| 208 | Scheduler_strong_APA_Context *self = |
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| 209 | _Scheduler_strong_APA_Get_self( context ); |
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| 210 | |
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| 211 | (void) node; |
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| 212 | |
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| 213 | return (Scheduler_Node *) _Scheduler_priority_Ready_queue_first( |
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| 214 | &self->Bit_map, |
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| 215 | &self->Ready[ 0 ] |
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| 216 | ); |
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| 217 | } |
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| 218 | |
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| 219 | void _Scheduler_strong_APA_Block( |
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| 220 | const Scheduler_Control *scheduler, |
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[e382a1b] | 221 | Thread_Control *the_thread, |
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| 222 | Scheduler_Node *node |
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[981eed2] | 223 | ) |
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| 224 | { |
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| 225 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 226 | |
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| 227 | _Scheduler_SMP_Block( |
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| 228 | context, |
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| 229 | the_thread, |
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[e382a1b] | 230 | node, |
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[981eed2] | 231 | _Scheduler_strong_APA_Extract_from_ready, |
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| 232 | _Scheduler_strong_APA_Get_highest_ready, |
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| 233 | _Scheduler_strong_APA_Move_from_ready_to_scheduled, |
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[09c87fb] | 234 | _Scheduler_SMP_Allocate_processor_exact |
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[981eed2] | 235 | ); |
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| 236 | } |
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| 237 | |
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| 238 | static Thread_Control *_Scheduler_strong_APA_Enqueue_ordered( |
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| 239 | Scheduler_Context *context, |
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| 240 | Scheduler_Node *node, |
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| 241 | Thread_Control *needs_help, |
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| 242 | Chain_Node_order order, |
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| 243 | Scheduler_SMP_Insert insert_ready, |
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| 244 | Scheduler_SMP_Insert insert_scheduled |
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| 245 | ) |
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| 246 | { |
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| 247 | return _Scheduler_SMP_Enqueue_ordered( |
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| 248 | context, |
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| 249 | node, |
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| 250 | needs_help, |
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| 251 | order, |
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| 252 | insert_ready, |
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| 253 | insert_scheduled, |
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| 254 | _Scheduler_strong_APA_Move_from_scheduled_to_ready, |
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| 255 | _Scheduler_SMP_Get_lowest_scheduled, |
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[09c87fb] | 256 | _Scheduler_SMP_Allocate_processor_exact |
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[981eed2] | 257 | ); |
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| 258 | } |
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| 259 | |
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| 260 | static Thread_Control *_Scheduler_strong_APA_Enqueue_lifo( |
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| 261 | Scheduler_Context *context, |
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| 262 | Scheduler_Node *node, |
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| 263 | Thread_Control *needs_help |
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| 264 | ) |
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| 265 | { |
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| 266 | return _Scheduler_strong_APA_Enqueue_ordered( |
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| 267 | context, |
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| 268 | node, |
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| 269 | needs_help, |
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| 270 | _Scheduler_SMP_Insert_priority_lifo_order, |
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| 271 | _Scheduler_strong_APA_Insert_ready_lifo, |
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| 272 | _Scheduler_SMP_Insert_scheduled_lifo |
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| 273 | ); |
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| 274 | } |
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| 275 | |
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| 276 | static Thread_Control *_Scheduler_strong_APA_Enqueue_fifo( |
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| 277 | Scheduler_Context *context, |
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| 278 | Scheduler_Node *node, |
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| 279 | Thread_Control *needs_help |
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| 280 | ) |
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| 281 | { |
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| 282 | return _Scheduler_strong_APA_Enqueue_ordered( |
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| 283 | context, |
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| 284 | node, |
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| 285 | needs_help, |
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| 286 | _Scheduler_SMP_Insert_priority_fifo_order, |
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| 287 | _Scheduler_strong_APA_Insert_ready_fifo, |
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| 288 | _Scheduler_SMP_Insert_scheduled_fifo |
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| 289 | ); |
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| 290 | } |
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| 291 | |
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| 292 | static Thread_Control *_Scheduler_strong_APA_Enqueue_scheduled_ordered( |
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| 293 | Scheduler_Context *context, |
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| 294 | Scheduler_Node *node, |
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| 295 | Chain_Node_order order, |
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| 296 | Scheduler_SMP_Insert insert_ready, |
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| 297 | Scheduler_SMP_Insert insert_scheduled |
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| 298 | ) |
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| 299 | { |
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| 300 | return _Scheduler_SMP_Enqueue_scheduled_ordered( |
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| 301 | context, |
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| 302 | node, |
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| 303 | order, |
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| 304 | _Scheduler_strong_APA_Extract_from_ready, |
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| 305 | _Scheduler_strong_APA_Get_highest_ready, |
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| 306 | insert_ready, |
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| 307 | insert_scheduled, |
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| 308 | _Scheduler_strong_APA_Move_from_ready_to_scheduled, |
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[09c87fb] | 309 | _Scheduler_SMP_Allocate_processor_exact |
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[981eed2] | 310 | ); |
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| 311 | } |
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| 312 | |
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| 313 | static Thread_Control *_Scheduler_strong_APA_Enqueue_scheduled_lifo( |
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| 314 | Scheduler_Context *context, |
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| 315 | Scheduler_Node *node |
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| 316 | ) |
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| 317 | { |
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| 318 | return _Scheduler_strong_APA_Enqueue_scheduled_ordered( |
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| 319 | context, |
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| 320 | node, |
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| 321 | _Scheduler_SMP_Insert_priority_lifo_order, |
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| 322 | _Scheduler_strong_APA_Insert_ready_lifo, |
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| 323 | _Scheduler_SMP_Insert_scheduled_lifo |
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| 324 | ); |
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| 325 | } |
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| 326 | |
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| 327 | static Thread_Control *_Scheduler_strong_APA_Enqueue_scheduled_fifo( |
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| 328 | Scheduler_Context *context, |
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| 329 | Scheduler_Node *node |
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| 330 | ) |
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| 331 | { |
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| 332 | return _Scheduler_strong_APA_Enqueue_scheduled_ordered( |
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| 333 | context, |
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| 334 | node, |
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| 335 | _Scheduler_SMP_Insert_priority_fifo_order, |
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| 336 | _Scheduler_strong_APA_Insert_ready_fifo, |
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| 337 | _Scheduler_SMP_Insert_scheduled_fifo |
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| 338 | ); |
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| 339 | } |
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| 340 | |
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| 341 | Thread_Control *_Scheduler_strong_APA_Unblock( |
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| 342 | const Scheduler_Control *scheduler, |
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[72e0bdb] | 343 | Thread_Control *the_thread, |
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| 344 | Scheduler_Node *node |
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[981eed2] | 345 | ) |
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| 346 | { |
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| 347 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 348 | |
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| 349 | return _Scheduler_SMP_Unblock( |
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| 350 | context, |
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| 351 | the_thread, |
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[72e0bdb] | 352 | node, |
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[9bfad8c] | 353 | _Scheduler_strong_APA_Do_update, |
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[981eed2] | 354 | _Scheduler_strong_APA_Enqueue_fifo |
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| 355 | ); |
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| 356 | } |
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| 357 | |
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[351c14d] | 358 | static bool _Scheduler_strong_APA_Do_ask_for_help( |
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| 359 | Scheduler_Context *context, |
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| 360 | Thread_Control *the_thread, |
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| 361 | Scheduler_Node *node |
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| 362 | ) |
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| 363 | { |
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| 364 | return _Scheduler_SMP_Ask_for_help( |
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| 365 | context, |
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| 366 | the_thread, |
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| 367 | node, |
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| 368 | _Scheduler_SMP_Insert_priority_lifo_order, |
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| 369 | _Scheduler_strong_APA_Insert_ready_lifo, |
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| 370 | _Scheduler_SMP_Insert_scheduled_lifo, |
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| 371 | _Scheduler_strong_APA_Move_from_scheduled_to_ready, |
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| 372 | _Scheduler_SMP_Get_lowest_scheduled, |
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| 373 | _Scheduler_SMP_Allocate_processor_lazy |
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| 374 | ); |
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| 375 | } |
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| 376 | |
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[9c238e1] | 377 | void _Scheduler_strong_APA_Update_priority( |
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[981eed2] | 378 | const Scheduler_Control *scheduler, |
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[501043a] | 379 | Thread_Control *the_thread, |
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| 380 | Scheduler_Node *node |
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[981eed2] | 381 | ) |
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| 382 | { |
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| 383 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 384 | |
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[9c238e1] | 385 | _Scheduler_SMP_Update_priority( |
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[981eed2] | 386 | context, |
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| 387 | the_thread, |
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[501043a] | 388 | node, |
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[981eed2] | 389 | _Scheduler_strong_APA_Extract_from_ready, |
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| 390 | _Scheduler_strong_APA_Do_update, |
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| 391 | _Scheduler_strong_APA_Enqueue_fifo, |
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| 392 | _Scheduler_strong_APA_Enqueue_lifo, |
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| 393 | _Scheduler_strong_APA_Enqueue_scheduled_fifo, |
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[351c14d] | 394 | _Scheduler_strong_APA_Enqueue_scheduled_lifo, |
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| 395 | _Scheduler_strong_APA_Do_ask_for_help |
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| 396 | ); |
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| 397 | } |
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| 398 | |
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| 399 | bool _Scheduler_strong_APA_Ask_for_help( |
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| 400 | const Scheduler_Control *scheduler, |
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| 401 | Thread_Control *the_thread, |
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| 402 | Scheduler_Node *node |
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| 403 | ) |
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| 404 | { |
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| 405 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 406 | |
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| 407 | return _Scheduler_strong_APA_Do_ask_for_help( context, the_thread, node ); |
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| 408 | } |
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| 409 | |
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| 410 | void _Scheduler_strong_APA_Reconsider_help_request( |
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| 411 | const Scheduler_Control *scheduler, |
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| 412 | Thread_Control *the_thread, |
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| 413 | Scheduler_Node *node |
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| 414 | ) |
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| 415 | { |
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| 416 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 417 | |
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| 418 | _Scheduler_SMP_Reconsider_help_request( |
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| 419 | context, |
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| 420 | the_thread, |
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| 421 | node, |
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| 422 | _Scheduler_strong_APA_Extract_from_ready |
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| 423 | ); |
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| 424 | } |
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| 425 | |
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| 426 | void _Scheduler_strong_APA_Withdraw_node( |
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| 427 | const Scheduler_Control *scheduler, |
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| 428 | Thread_Control *the_thread, |
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| 429 | Scheduler_Node *node, |
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| 430 | Thread_Scheduler_state next_state |
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| 431 | ) |
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| 432 | { |
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| 433 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 434 | |
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| 435 | _Scheduler_SMP_Withdraw_node( |
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| 436 | context, |
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| 437 | the_thread, |
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| 438 | node, |
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| 439 | next_state, |
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| 440 | _Scheduler_strong_APA_Extract_from_ready, |
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| 441 | _Scheduler_strong_APA_Get_highest_ready, |
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| 442 | _Scheduler_strong_APA_Move_from_ready_to_scheduled, |
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| 443 | _Scheduler_SMP_Allocate_processor_lazy |
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[981eed2] | 444 | ); |
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| 445 | } |
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| 446 | |
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[d097b546] | 447 | Thread_Control *_Scheduler_strong_APA_Ask_for_help_X( |
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[981eed2] | 448 | const Scheduler_Control *scheduler, |
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| 449 | Thread_Control *offers_help, |
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| 450 | Thread_Control *needs_help |
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| 451 | ) |
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| 452 | { |
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| 453 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 454 | |
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[d097b546] | 455 | return _Scheduler_SMP_Ask_for_help_X( |
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[981eed2] | 456 | context, |
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| 457 | offers_help, |
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| 458 | needs_help, |
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| 459 | _Scheduler_strong_APA_Enqueue_fifo |
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| 460 | ); |
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| 461 | } |
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| 462 | |
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| 463 | Thread_Control *_Scheduler_strong_APA_Yield( |
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| 464 | const Scheduler_Control *scheduler, |
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[2df4abc] | 465 | Thread_Control *the_thread, |
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| 466 | Scheduler_Node *node |
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[981eed2] | 467 | ) |
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| 468 | { |
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| 469 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 470 | |
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| 471 | return _Scheduler_SMP_Yield( |
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| 472 | context, |
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| 473 | the_thread, |
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[2df4abc] | 474 | node, |
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[981eed2] | 475 | _Scheduler_strong_APA_Extract_from_ready, |
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| 476 | _Scheduler_strong_APA_Enqueue_fifo, |
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| 477 | _Scheduler_strong_APA_Enqueue_scheduled_fifo |
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| 478 | ); |
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| 479 | } |
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