[a936aa49] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @brief Simple SMP Scheduler Implementation |
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| 5 | * |
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[beab7329] | 6 | * @ingroup ScoreSchedulerSMPSimple |
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[a936aa49] | 7 | */ |
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| 8 | |
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| 9 | /* |
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[351c14d] | 10 | * Copyright (c) 2013, 2016 embedded brains GmbH. |
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[a936aa49] | 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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[c499856] | 14 | * http://www.rtems.org/license/LICENSE. |
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[a936aa49] | 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/schedulersimplesmp.h> |
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[9d83f58a] | 22 | #include <rtems/score/schedulersmpimpl.h> |
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[a936aa49] | 23 | |
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[e1598a6] | 24 | static Scheduler_simple_SMP_Context * |
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| 25 | _Scheduler_simple_SMP_Get_context( const Scheduler_Control *scheduler ) |
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[494c2e3] | 26 | { |
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[2369b10] | 27 | return (Scheduler_simple_SMP_Context *) _Scheduler_Get_context( scheduler ); |
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[494c2e3] | 28 | } |
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| 29 | |
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[e1598a6] | 30 | static Scheduler_simple_SMP_Context * |
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[3730a07f] | 31 | _Scheduler_simple_SMP_Get_self( Scheduler_Context *context ) |
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[494c2e3] | 32 | { |
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[3730a07f] | 33 | return (Scheduler_simple_SMP_Context *) context; |
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[494c2e3] | 34 | } |
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| 35 | |
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[e9ee2f0] | 36 | void _Scheduler_simple_SMP_Initialize( const Scheduler_Control *scheduler ) |
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[a936aa49] | 37 | { |
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[e1598a6] | 38 | Scheduler_simple_SMP_Context *self = |
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| 39 | _Scheduler_simple_SMP_Get_context( scheduler ); |
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[a936aa49] | 40 | |
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[494c2e3] | 41 | _Scheduler_SMP_Initialize( &self->Base ); |
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| 42 | _Chain_Initialize_empty( &self->Ready ); |
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[a936aa49] | 43 | } |
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| 44 | |
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[8e467384] | 45 | void _Scheduler_simple_SMP_Node_initialize( |
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[beab7329] | 46 | const Scheduler_Control *scheduler, |
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[df2177ab] | 47 | Scheduler_Node *node, |
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[9bfad8c] | 48 | Thread_Control *the_thread, |
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| 49 | Priority_Control priority |
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[beab7329] | 50 | ) |
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| 51 | { |
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[351c14d] | 52 | Scheduler_SMP_Node *smp_node; |
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[beab7329] | 53 | |
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[351c14d] | 54 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
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| 55 | _Scheduler_SMP_Node_initialize( scheduler, smp_node, the_thread, priority ); |
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[beab7329] | 56 | } |
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| 57 | |
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[f39f667a] | 58 | static void _Scheduler_simple_SMP_Do_update( |
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| 59 | Scheduler_Context *context, |
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[df2177ab] | 60 | Scheduler_Node *node, |
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[8f0c7a46] | 61 | Priority_Control new_priority |
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[f39f667a] | 62 | ) |
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| 63 | { |
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[351c14d] | 64 | Scheduler_SMP_Node *smp_node; |
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[8f0c7a46] | 65 | |
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[f39f667a] | 66 | (void) context; |
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[8f0c7a46] | 67 | |
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[351c14d] | 68 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
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| 69 | _Scheduler_SMP_Node_update_priority( smp_node, new_priority ); |
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[f39f667a] | 70 | } |
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| 71 | |
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[05ca53d] | 72 | static bool _Scheduler_simple_SMP_Has_ready( Scheduler_Context *context ) |
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| 73 | { |
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| 74 | Scheduler_simple_SMP_Context *self = |
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| 75 | _Scheduler_simple_SMP_Get_self( context ); |
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| 76 | |
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| 77 | return !_Chain_Is_empty( &self->Ready ); |
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| 78 | } |
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| 79 | |
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[8f0c7a46] | 80 | static Scheduler_Node *_Scheduler_simple_SMP_Get_highest_ready( |
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[238629f] | 81 | Scheduler_Context *context, |
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[8f0c7a46] | 82 | Scheduler_Node *node |
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[aea4a91] | 83 | ) |
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| 84 | { |
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[e1598a6] | 85 | Scheduler_simple_SMP_Context *self = |
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[3730a07f] | 86 | _Scheduler_simple_SMP_Get_self( context ); |
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[333f9426] | 87 | Scheduler_Node *first = (Scheduler_Node *) _Chain_First( &self->Ready ); |
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[aea4a91] | 88 | |
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[8f0c7a46] | 89 | (void) node; |
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[238629f] | 90 | |
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[15dbc710] | 91 | _Assert( &first->Node.Chain != _Chain_Tail( &self->Ready ) ); |
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[333f9426] | 92 | |
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| 93 | return first; |
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[aea4a91] | 94 | } |
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| 95 | |
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[e9ee2f0] | 96 | static void _Scheduler_simple_SMP_Move_from_scheduled_to_ready( |
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[3730a07f] | 97 | Scheduler_Context *context, |
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[8f0c7a46] | 98 | Scheduler_Node *scheduled_to_ready |
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[a936aa49] | 99 | ) |
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| 100 | { |
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[e1598a6] | 101 | Scheduler_simple_SMP_Context *self = |
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[3730a07f] | 102 | _Scheduler_simple_SMP_Get_self( context ); |
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[494c2e3] | 103 | |
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[15dbc710] | 104 | _Chain_Extract_unprotected( &scheduled_to_ready->Node.Chain ); |
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[8f0c7a46] | 105 | _Chain_Insert_ordered_unprotected( |
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[494c2e3] | 106 | &self->Ready, |
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[15dbc710] | 107 | &scheduled_to_ready->Node.Chain, |
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[8f0c7a46] | 108 | _Scheduler_SMP_Insert_priority_lifo_order |
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[aea4a91] | 109 | ); |
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[a936aa49] | 110 | } |
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| 111 | |
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[e9ee2f0] | 112 | static void _Scheduler_simple_SMP_Move_from_ready_to_scheduled( |
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[3730a07f] | 113 | Scheduler_Context *context, |
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[8f0c7a46] | 114 | Scheduler_Node *ready_to_scheduled |
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[a936aa49] | 115 | ) |
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| 116 | { |
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[3730a07f] | 117 | Scheduler_simple_SMP_Context *self = |
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| 118 | _Scheduler_simple_SMP_Get_self( context ); |
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| 119 | |
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[15dbc710] | 120 | _Chain_Extract_unprotected( &ready_to_scheduled->Node.Chain ); |
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[8f0c7a46] | 121 | _Chain_Insert_ordered_unprotected( |
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[3730a07f] | 122 | &self->Base.Scheduled, |
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[15dbc710] | 123 | &ready_to_scheduled->Node.Chain, |
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[8f0c7a46] | 124 | _Scheduler_SMP_Insert_priority_fifo_order |
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[aea4a91] | 125 | ); |
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[a936aa49] | 126 | } |
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| 127 | |
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[e9ee2f0] | 128 | static void _Scheduler_simple_SMP_Insert_ready_lifo( |
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[3730a07f] | 129 | Scheduler_Context *context, |
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[8f0c7a46] | 130 | Scheduler_Node *node_to_insert |
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[a936aa49] | 131 | ) |
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| 132 | { |
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[e1598a6] | 133 | Scheduler_simple_SMP_Context *self = |
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[3730a07f] | 134 | _Scheduler_simple_SMP_Get_self( context ); |
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[494c2e3] | 135 | |
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[48c4a55] | 136 | _Chain_Insert_ordered_unprotected( |
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[494c2e3] | 137 | &self->Ready, |
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[15dbc710] | 138 | &node_to_insert->Node.Chain, |
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[8f0c7a46] | 139 | _Scheduler_SMP_Insert_priority_lifo_order |
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[48c4a55] | 140 | ); |
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[a936aa49] | 141 | } |
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| 142 | |
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[e9ee2f0] | 143 | static void _Scheduler_simple_SMP_Insert_ready_fifo( |
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[3730a07f] | 144 | Scheduler_Context *context, |
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[8f0c7a46] | 145 | Scheduler_Node *node_to_insert |
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[aea4a91] | 146 | ) |
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| 147 | { |
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[e1598a6] | 148 | Scheduler_simple_SMP_Context *self = |
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[3730a07f] | 149 | _Scheduler_simple_SMP_Get_self( context ); |
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[494c2e3] | 150 | |
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[48c4a55] | 151 | _Chain_Insert_ordered_unprotected( |
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[494c2e3] | 152 | &self->Ready, |
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[15dbc710] | 153 | &node_to_insert->Node.Chain, |
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[8f0c7a46] | 154 | _Scheduler_SMP_Insert_priority_fifo_order |
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[48c4a55] | 155 | ); |
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[aea4a91] | 156 | } |
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| 157 | |
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[f39f667a] | 158 | static void _Scheduler_simple_SMP_Extract_from_ready( |
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[3730a07f] | 159 | Scheduler_Context *context, |
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[8f0c7a46] | 160 | Scheduler_Node *node_to_extract |
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[a936aa49] | 161 | ) |
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| 162 | { |
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[3730a07f] | 163 | (void) context; |
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[a936aa49] | 164 | |
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[15dbc710] | 165 | _Chain_Extract_unprotected( &node_to_extract->Node.Chain ); |
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[aea4a91] | 166 | } |
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[a936aa49] | 167 | |
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[e9ee2f0] | 168 | void _Scheduler_simple_SMP_Block( |
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[e1598a6] | 169 | const Scheduler_Control *scheduler, |
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[e382a1b] | 170 | Thread_Control *thread, |
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| 171 | Scheduler_Node *node |
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[24934e36] | 172 | ) |
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[aea4a91] | 173 | { |
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[f39f667a] | 174 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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[a936aa49] | 175 | |
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[48c4a55] | 176 | _Scheduler_SMP_Block( |
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[f39f667a] | 177 | context, |
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[48c4a55] | 178 | thread, |
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[e382a1b] | 179 | node, |
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[f39f667a] | 180 | _Scheduler_simple_SMP_Extract_from_ready, |
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[e9ee2f0] | 181 | _Scheduler_simple_SMP_Get_highest_ready, |
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[238629f] | 182 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
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[27783f6] | 183 | _Scheduler_SMP_Allocate_processor_lazy |
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[48c4a55] | 184 | ); |
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| 185 | } |
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[a936aa49] | 186 | |
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[63e2ca1b] | 187 | static bool _Scheduler_simple_SMP_Enqueue_ordered( |
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[8568341] | 188 | Scheduler_Context *context, |
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| 189 | Scheduler_Node *node, |
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| 190 | Chain_Node_order order, |
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| 191 | Scheduler_SMP_Insert insert_ready, |
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| 192 | Scheduler_SMP_Insert insert_scheduled |
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[48c4a55] | 193 | ) |
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| 194 | { |
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[8568341] | 195 | return _Scheduler_SMP_Enqueue_ordered( |
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[3730a07f] | 196 | context, |
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[8f0c7a46] | 197 | node, |
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[48c4a55] | 198 | order, |
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| 199 | insert_ready, |
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| 200 | insert_scheduled, |
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[238629f] | 201 | _Scheduler_simple_SMP_Move_from_scheduled_to_ready, |
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| 202 | _Scheduler_SMP_Get_lowest_scheduled, |
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[27783f6] | 203 | _Scheduler_SMP_Allocate_processor_lazy |
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[48c4a55] | 204 | ); |
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[a936aa49] | 205 | } |
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| 206 | |
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[63e2ca1b] | 207 | static bool _Scheduler_simple_SMP_Enqueue_lifo( |
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[f39f667a] | 208 | Scheduler_Context *context, |
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[63e2ca1b] | 209 | Scheduler_Node *node |
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[24934e36] | 210 | ) |
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[a936aa49] | 211 | { |
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[8568341] | 212 | return _Scheduler_simple_SMP_Enqueue_ordered( |
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[f39f667a] | 213 | context, |
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[8f0c7a46] | 214 | node, |
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| 215 | _Scheduler_SMP_Insert_priority_lifo_order, |
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[e9ee2f0] | 216 | _Scheduler_simple_SMP_Insert_ready_lifo, |
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[48c4a55] | 217 | _Scheduler_SMP_Insert_scheduled_lifo |
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[a936aa49] | 218 | ); |
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| 219 | } |
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| 220 | |
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[63e2ca1b] | 221 | static bool _Scheduler_simple_SMP_Enqueue_fifo( |
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[f39f667a] | 222 | Scheduler_Context *context, |
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[63e2ca1b] | 223 | Scheduler_Node *node |
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[24934e36] | 224 | ) |
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[a936aa49] | 225 | { |
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[8568341] | 226 | return _Scheduler_simple_SMP_Enqueue_ordered( |
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[f39f667a] | 227 | context, |
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[8f0c7a46] | 228 | node, |
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| 229 | _Scheduler_SMP_Insert_priority_fifo_order, |
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[c0bff5e] | 230 | _Scheduler_simple_SMP_Insert_ready_fifo, |
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| 231 | _Scheduler_SMP_Insert_scheduled_fifo |
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| 232 | ); |
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| 233 | } |
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| 234 | |
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[63e2ca1b] | 235 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
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[c0bff5e] | 236 | Scheduler_Context *context, |
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[8f0c7a46] | 237 | Scheduler_Node *node, |
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[c0bff5e] | 238 | Chain_Node_order order, |
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| 239 | Scheduler_SMP_Insert insert_ready, |
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| 240 | Scheduler_SMP_Insert insert_scheduled |
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| 241 | ) |
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| 242 | { |
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[8568341] | 243 | return _Scheduler_SMP_Enqueue_scheduled_ordered( |
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[c0bff5e] | 244 | context, |
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[8f0c7a46] | 245 | node, |
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[c0bff5e] | 246 | order, |
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[5c3d250] | 247 | _Scheduler_simple_SMP_Extract_from_ready, |
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[c0bff5e] | 248 | _Scheduler_simple_SMP_Get_highest_ready, |
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| 249 | insert_ready, |
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| 250 | insert_scheduled, |
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[238629f] | 251 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
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[27783f6] | 252 | _Scheduler_SMP_Allocate_processor_lazy |
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[c0bff5e] | 253 | ); |
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| 254 | } |
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| 255 | |
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[63e2ca1b] | 256 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_lifo( |
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[c0bff5e] | 257 | Scheduler_Context *context, |
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[8f0c7a46] | 258 | Scheduler_Node *node |
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[c0bff5e] | 259 | ) |
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| 260 | { |
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[8568341] | 261 | return _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
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[c0bff5e] | 262 | context, |
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[8f0c7a46] | 263 | node, |
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| 264 | _Scheduler_SMP_Insert_priority_lifo_order, |
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[c0bff5e] | 265 | _Scheduler_simple_SMP_Insert_ready_lifo, |
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| 266 | _Scheduler_SMP_Insert_scheduled_lifo |
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| 267 | ); |
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| 268 | } |
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| 269 | |
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[63e2ca1b] | 270 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_fifo( |
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[c0bff5e] | 271 | Scheduler_Context *context, |
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[8f0c7a46] | 272 | Scheduler_Node *node |
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[c0bff5e] | 273 | ) |
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| 274 | { |
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[8568341] | 275 | return _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
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[c0bff5e] | 276 | context, |
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[8f0c7a46] | 277 | node, |
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| 278 | _Scheduler_SMP_Insert_priority_fifo_order, |
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[e9ee2f0] | 279 | _Scheduler_simple_SMP_Insert_ready_fifo, |
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[48c4a55] | 280 | _Scheduler_SMP_Insert_scheduled_fifo |
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[a936aa49] | 281 | ); |
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| 282 | } |
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| 283 | |
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[ca1e546e] | 284 | void _Scheduler_simple_SMP_Unblock( |
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[e1598a6] | 285 | const Scheduler_Control *scheduler, |
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[72e0bdb] | 286 | Thread_Control *thread, |
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| 287 | Scheduler_Node *node |
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[24934e36] | 288 | ) |
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[a936aa49] | 289 | { |
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[f39f667a] | 290 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 291 | |
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[ca1e546e] | 292 | _Scheduler_SMP_Unblock( |
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[c0bff5e] | 293 | context, |
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| 294 | thread, |
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[72e0bdb] | 295 | node, |
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[9bfad8c] | 296 | _Scheduler_simple_SMP_Do_update, |
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[27783f6] | 297 | _Scheduler_simple_SMP_Enqueue_fifo |
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[c0bff5e] | 298 | ); |
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[f39f667a] | 299 | } |
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[a936aa49] | 300 | |
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[351c14d] | 301 | static bool _Scheduler_simple_SMP_Do_ask_for_help( |
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| 302 | Scheduler_Context *context, |
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| 303 | Thread_Control *the_thread, |
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| 304 | Scheduler_Node *node |
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| 305 | ) |
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| 306 | { |
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| 307 | return _Scheduler_SMP_Ask_for_help( |
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| 308 | context, |
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| 309 | the_thread, |
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| 310 | node, |
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| 311 | _Scheduler_SMP_Insert_priority_lifo_order, |
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| 312 | _Scheduler_simple_SMP_Insert_ready_lifo, |
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| 313 | _Scheduler_SMP_Insert_scheduled_lifo, |
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| 314 | _Scheduler_simple_SMP_Move_from_scheduled_to_ready, |
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| 315 | _Scheduler_SMP_Get_lowest_scheduled, |
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| 316 | _Scheduler_SMP_Allocate_processor_lazy |
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| 317 | ); |
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| 318 | } |
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| 319 | |
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[9c238e1] | 320 | void _Scheduler_simple_SMP_Update_priority( |
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[f39f667a] | 321 | const Scheduler_Control *scheduler, |
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[501043a] | 322 | Thread_Control *thread, |
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| 323 | Scheduler_Node *node |
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[f39f667a] | 324 | ) |
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| 325 | { |
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| 326 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 327 | |
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[9c238e1] | 328 | _Scheduler_SMP_Update_priority( |
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[f39f667a] | 329 | context, |
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[48c4a55] | 330 | thread, |
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[501043a] | 331 | node, |
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[f39f667a] | 332 | _Scheduler_simple_SMP_Extract_from_ready, |
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| 333 | _Scheduler_simple_SMP_Do_update, |
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| 334 | _Scheduler_simple_SMP_Enqueue_fifo, |
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[c0bff5e] | 335 | _Scheduler_simple_SMP_Enqueue_lifo, |
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| 336 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo, |
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[351c14d] | 337 | _Scheduler_simple_SMP_Enqueue_scheduled_lifo, |
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| 338 | _Scheduler_simple_SMP_Do_ask_for_help |
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| 339 | ); |
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| 340 | } |
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| 341 | |
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| 342 | bool _Scheduler_simple_SMP_Ask_for_help( |
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| 343 | const Scheduler_Control *scheduler, |
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| 344 | Thread_Control *the_thread, |
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| 345 | Scheduler_Node *node |
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| 346 | ) |
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| 347 | { |
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| 348 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 349 | |
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| 350 | return _Scheduler_simple_SMP_Do_ask_for_help( context, the_thread, node ); |
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| 351 | } |
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| 352 | |
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| 353 | void _Scheduler_simple_SMP_Reconsider_help_request( |
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| 354 | const Scheduler_Control *scheduler, |
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| 355 | Thread_Control *the_thread, |
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| 356 | Scheduler_Node *node |
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| 357 | ) |
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| 358 | { |
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| 359 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 360 | |
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| 361 | _Scheduler_SMP_Reconsider_help_request( |
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| 362 | context, |
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| 363 | the_thread, |
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| 364 | node, |
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| 365 | _Scheduler_simple_SMP_Extract_from_ready |
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| 366 | ); |
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| 367 | } |
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| 368 | |
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| 369 | void _Scheduler_simple_SMP_Withdraw_node( |
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| 370 | const Scheduler_Control *scheduler, |
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| 371 | Thread_Control *the_thread, |
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| 372 | Scheduler_Node *node, |
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| 373 | Thread_Scheduler_state next_state |
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| 374 | ) |
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| 375 | { |
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| 376 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 377 | |
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| 378 | _Scheduler_SMP_Withdraw_node( |
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| 379 | context, |
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| 380 | the_thread, |
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| 381 | node, |
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| 382 | next_state, |
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| 383 | _Scheduler_simple_SMP_Extract_from_ready, |
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| 384 | _Scheduler_simple_SMP_Get_highest_ready, |
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| 385 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
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| 386 | _Scheduler_SMP_Allocate_processor_lazy |
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[48c4a55] | 387 | ); |
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[a936aa49] | 388 | } |
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| 389 | |
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[05ca53d] | 390 | void _Scheduler_simple_SMP_Add_processor( |
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| 391 | const Scheduler_Control *scheduler, |
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| 392 | Thread_Control *idle |
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| 393 | ) |
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| 394 | { |
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| 395 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 396 | |
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| 397 | _Scheduler_SMP_Add_processor( |
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| 398 | context, |
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| 399 | idle, |
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| 400 | _Scheduler_simple_SMP_Has_ready, |
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[34487537] | 401 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo, |
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| 402 | _Scheduler_SMP_Do_nothing_register_idle |
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[05ca53d] | 403 | ); |
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| 404 | } |
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| 405 | |
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| 406 | Thread_Control *_Scheduler_simple_SMP_Remove_processor( |
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| 407 | const Scheduler_Control *scheduler, |
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| 408 | Per_CPU_Control *cpu |
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| 409 | ) |
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| 410 | { |
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| 411 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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| 412 | |
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| 413 | return _Scheduler_SMP_Remove_processor( |
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| 414 | context, |
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| 415 | cpu, |
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| 416 | _Scheduler_simple_SMP_Extract_from_ready, |
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| 417 | _Scheduler_simple_SMP_Enqueue_fifo |
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| 418 | ); |
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| 419 | } |
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| 420 | |
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[ca1e546e] | 421 | void _Scheduler_simple_SMP_Yield( |
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[e1598a6] | 422 | const Scheduler_Control *scheduler, |
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[2df4abc] | 423 | Thread_Control *thread, |
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| 424 | Scheduler_Node *node |
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[24934e36] | 425 | ) |
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[a936aa49] | 426 | { |
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[f39f667a] | 427 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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[a936aa49] | 428 | |
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[ca1e546e] | 429 | _Scheduler_SMP_Yield( |
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[701dd96f] | 430 | context, |
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| 431 | thread, |
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[2df4abc] | 432 | node, |
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[701dd96f] | 433 | _Scheduler_simple_SMP_Extract_from_ready, |
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| 434 | _Scheduler_simple_SMP_Enqueue_fifo, |
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| 435 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo |
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| 436 | ); |
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[a936aa49] | 437 | } |
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