[ac7d5ef0] | 1 | /* |
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| 2 | * Thread Queue Handler |
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| 3 | * |
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| 4 | * |
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| 5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 6 | * On-Line Applications Research Corporation (OAR). |
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| 7 | * All rights assigned to U.S. Government, 1994. |
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| 8 | * |
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| 9 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 11 | * notice must appear in all copies of this file and its derivatives. |
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| 12 | * |
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| 13 | * $Id$ |
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| 14 | */ |
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| 15 | |
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| 16 | #include <rtems/system.h> |
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[5e9b32b] | 17 | #include <rtems/score/chain.h> |
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| 18 | #include <rtems/score/isr.h> |
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| 19 | #include <rtems/score/object.h> |
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| 20 | #include <rtems/score/states.h> |
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| 21 | #include <rtems/score/thread.h> |
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| 22 | #include <rtems/score/threadq.h> |
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| 23 | #include <rtems/score/tqdata.h> |
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[3a4ae6c] | 24 | |
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[ac7d5ef0] | 25 | /*PAGE |
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| 26 | * |
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| 27 | * _Thread_queue_Initialize |
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| 28 | * |
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| 29 | * This routine initializes the specified threadq. |
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| 30 | * |
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| 31 | * Input parameters: |
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[3a4ae6c] | 32 | * the_thread_queue - pointer to a threadq header |
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| 33 | * the_class - class of the object to which this belongs |
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| 34 | * discipline - queueing discipline |
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| 35 | * state - state of waiting threads |
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| 36 | * proxy_extract_callout - MP specific callout |
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| 37 | * timeout_status - return on a timeout |
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[ac7d5ef0] | 38 | * |
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| 39 | * Output parameters: NONE |
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| 40 | */ |
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| 41 | |
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| 42 | void _Thread_queue_Initialize( |
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[7f6a24ab] | 43 | Thread_queue_Control *the_thread_queue, |
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| 44 | Objects_Classes the_class, |
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| 45 | Thread_queue_Disciplines the_discipline, |
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| 46 | States_Control state, |
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[3a4ae6c] | 47 | Thread_queue_Extract_callout proxy_extract_callout, |
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| 48 | unsigned32 timeout_status |
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[ac7d5ef0] | 49 | ) |
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| 50 | { |
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| 51 | unsigned32 index; |
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| 52 | |
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[7f6a24ab] | 53 | _Thread_queue_Extract_table[ the_class ] = proxy_extract_callout; |
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| 54 | |
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[3a4ae6c] | 55 | the_thread_queue->state = state; |
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| 56 | the_thread_queue->discipline = the_discipline; |
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| 57 | the_thread_queue->timeout_status = timeout_status; |
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[ac7d5ef0] | 58 | |
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[7f6a24ab] | 59 | switch ( the_discipline ) { |
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| 60 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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| 61 | _Chain_Initialize_empty( &the_thread_queue->Queues.Fifo ); |
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| 62 | break; |
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| 63 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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| 64 | for( index=0 ; |
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| 65 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
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| 66 | index++) |
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| 67 | _Chain_Initialize_empty( &the_thread_queue->Queues.Priority[index] ); |
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| 68 | break; |
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| 69 | } |
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[ac7d5ef0] | 70 | |
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| 71 | } |
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| 72 | |
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| 73 | /*PAGE |
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| 74 | * |
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| 75 | * _Thread_queue_Enqueue |
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| 76 | * |
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| 77 | * This routine blocks a thread, places it on a thread, and optionally |
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| 78 | * starts a timeout timer. |
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| 79 | * |
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| 80 | * Input parameters: |
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| 81 | * the_thread_queue - pointer to threadq |
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| 82 | * timeout - interval to wait |
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| 83 | * |
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| 84 | * Output parameters: NONE |
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| 85 | * |
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| 86 | * INTERRUPT LATENCY: |
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| 87 | * only case |
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| 88 | */ |
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| 89 | |
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| 90 | void _Thread_queue_Enqueue( |
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| 91 | Thread_queue_Control *the_thread_queue, |
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[3a4ae6c] | 92 | Watchdog_Interval timeout |
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[ac7d5ef0] | 93 | ) |
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| 94 | { |
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| 95 | Thread_Control *the_thread; |
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| 96 | |
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| 97 | the_thread = _Thread_Executing; |
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| 98 | |
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[3a4ae6c] | 99 | if ( _Thread_MP_Is_receive( the_thread ) && the_thread->receive_packet ) |
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[ac7d5ef0] | 100 | the_thread = _Thread_MP_Allocate_proxy( the_thread_queue->state ); |
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| 101 | else |
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| 102 | _Thread_Set_state( the_thread, the_thread_queue->state ); |
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| 103 | |
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| 104 | if ( timeout ) { |
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| 105 | _Watchdog_Initialize( |
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| 106 | &the_thread->Timer, |
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| 107 | _Thread_queue_Timeout, |
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| 108 | the_thread->Object.id, |
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| 109 | NULL |
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| 110 | ); |
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| 111 | |
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| 112 | _Watchdog_Insert_ticks( |
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| 113 | &the_thread->Timer, |
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| 114 | timeout, |
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| 115 | WATCHDOG_NO_ACTIVATE |
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| 116 | ); |
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| 117 | } |
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| 118 | |
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| 119 | switch( the_thread_queue->discipline ) { |
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[7f6a24ab] | 120 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 121 | _Thread_queue_Enqueue_fifo( the_thread_queue, the_thread, timeout ); |
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| 122 | break; |
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[7f6a24ab] | 123 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 124 | _Thread_queue_Enqueue_priority( |
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| 125 | the_thread_queue, the_thread, timeout ); |
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| 126 | break; |
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| 127 | } |
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| 128 | } |
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| 129 | |
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| 130 | /*PAGE |
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| 131 | * |
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| 132 | * _Thread_queue_Dequeue |
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| 133 | * |
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| 134 | * This routine removes a thread from the specified threadq. If the |
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[3a4ae6c] | 135 | * threadq discipline is FIFO, it unblocks a thread, and cancels its |
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[ac7d5ef0] | 136 | * timeout timer. Priority discipline is processed elsewhere. |
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| 137 | * |
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| 138 | * Input parameters: |
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| 139 | * the_thread_queue - pointer to threadq |
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| 140 | * |
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| 141 | * Output parameters: |
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| 142 | * returns - thread dequeued or NULL |
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| 143 | * |
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| 144 | * INTERRUPT LATENCY: |
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| 145 | * check sync |
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| 146 | */ |
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| 147 | |
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| 148 | Thread_Control *_Thread_queue_Dequeue( |
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| 149 | Thread_queue_Control *the_thread_queue |
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| 150 | ) |
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| 151 | { |
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| 152 | Thread_Control *the_thread; |
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| 153 | ISR_Level level; |
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| 154 | |
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| 155 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 156 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 157 | the_thread = _Thread_queue_Dequeue_fifo( the_thread_queue ); |
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| 158 | break; |
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[7f6a24ab] | 159 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 160 | the_thread = _Thread_queue_Dequeue_priority( the_thread_queue ); |
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| 161 | break; |
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| 162 | default: /* this is only to prevent warnings */ |
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| 163 | the_thread = NULL; |
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| 164 | break; |
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| 165 | } |
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| 166 | |
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| 167 | if ( !_Thread_Is_null( the_thread ) ) |
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| 168 | return( the_thread ); |
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| 169 | |
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| 170 | _ISR_Disable( level ); |
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| 171 | if ( the_thread_queue->sync == FALSE ) { |
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| 172 | _ISR_Enable( level ); |
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| 173 | return( NULL ); |
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| 174 | } |
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| 175 | |
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| 176 | the_thread_queue->sync = FALSE; |
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| 177 | _ISR_Enable( level ); |
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| 178 | return( _Thread_Executing ); |
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| 179 | } |
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| 180 | |
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[7f6a24ab] | 181 | /*PAGE |
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| 182 | * |
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| 183 | * _Thread_queue_Extract_with_proxy |
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| 184 | * |
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| 185 | * This routine extracts the_thread from the_thread_queue |
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| 186 | * and insures that if there is a proxy for this task on |
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| 187 | * another node, it is also dealt with. |
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| 188 | * |
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| 189 | * XXX |
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| 190 | */ |
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| 191 | |
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| 192 | boolean _Thread_queue_Extract_with_proxy( |
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| 193 | Thread_Control *the_thread |
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| 194 | ) |
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| 195 | { |
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| 196 | States_Control state; |
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| 197 | Objects_Classes the_class; |
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| 198 | Thread_queue_Extract_callout proxy_extract_callout; |
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| 199 | |
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| 200 | state = the_thread->current_state; |
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| 201 | |
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| 202 | if ( _States_Is_waiting_on_thread_queue( state ) ) { |
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| 203 | if ( _States_Is_waiting_for_rpc_reply( state ) && |
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| 204 | _States_Is_locally_blocked( state ) ) { |
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| 205 | |
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[3a4ae6c] | 206 | the_class = _Objects_Get_class( the_thread->Wait.id ); |
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[7f6a24ab] | 207 | |
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| 208 | proxy_extract_callout = _Thread_queue_Extract_table[ the_class ]; |
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| 209 | |
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| 210 | if ( proxy_extract_callout ) |
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| 211 | (*proxy_extract_callout)( the_thread ); |
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| 212 | } |
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| 213 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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| 214 | |
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| 215 | return TRUE; |
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| 216 | } |
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| 217 | return FALSE; |
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| 218 | } |
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| 219 | |
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[ac7d5ef0] | 220 | /*PAGE |
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| 221 | * |
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| 222 | * _Thread_queue_Extract |
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| 223 | * |
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| 224 | * This routine removes a specific thread from the specified threadq, |
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| 225 | * deletes any timeout, and unblocks the thread. |
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| 226 | * |
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| 227 | * Input parameters: |
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| 228 | * the_thread_queue - pointer to a threadq header |
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| 229 | * the_thread - pointer to a thread control block |
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| 230 | * |
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| 231 | * Output parameters: NONE |
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| 232 | * |
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| 233 | * INTERRUPT LATENCY: NONE |
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| 234 | */ |
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| 235 | |
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| 236 | void _Thread_queue_Extract( |
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| 237 | Thread_queue_Control *the_thread_queue, |
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| 238 | Thread_Control *the_thread |
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| 239 | ) |
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| 240 | { |
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| 241 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 242 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 243 | _Thread_queue_Extract_fifo( the_thread_queue, the_thread ); |
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| 244 | break; |
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[7f6a24ab] | 245 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 246 | _Thread_queue_Extract_priority( the_thread_queue, the_thread ); |
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| 247 | break; |
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| 248 | } |
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| 249 | } |
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| 250 | |
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| 251 | /*PAGE |
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| 252 | * |
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| 253 | * _Thread_queue_Flush |
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| 254 | * |
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| 255 | * This kernel routine flushes the given thread queue. |
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| 256 | * |
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| 257 | * Input parameters: |
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[3a4ae6c] | 258 | * the_thread_queue - pointer to threadq to be flushed |
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| 259 | * remote_extract_callout - pointer to routine which extracts a remote thread |
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| 260 | * status - status to return to the thread |
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[ac7d5ef0] | 261 | * |
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| 262 | * Output parameters: NONE |
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| 263 | */ |
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| 264 | |
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| 265 | void _Thread_queue_Flush( |
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| 266 | Thread_queue_Control *the_thread_queue, |
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[3a4ae6c] | 267 | Thread_queue_Flush_callout remote_extract_callout, |
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| 268 | unsigned32 status |
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[ac7d5ef0] | 269 | ) |
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| 270 | { |
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| 271 | Thread_Control *the_thread; |
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| 272 | |
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| 273 | while ( (the_thread = _Thread_queue_Dequeue( the_thread_queue )) ) { |
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| 274 | if ( _Objects_Is_local_id( the_thread->Object.id ) ) |
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[3a4ae6c] | 275 | the_thread->Wait.return_code = status; |
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[ac7d5ef0] | 276 | else |
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| 277 | ( *remote_extract_callout )( the_thread ); |
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| 278 | } |
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| 279 | } |
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| 280 | |
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| 281 | /*PAGE |
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| 282 | * |
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| 283 | * _Thread_queue_First |
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| 284 | * |
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| 285 | * This routines returns a pointer to the first thread on the |
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| 286 | * specified threadq. |
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| 287 | * |
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| 288 | * Input parameters: |
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| 289 | * the_thread_queue - pointer to thread queue |
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| 290 | * |
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| 291 | * Output parameters: |
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| 292 | * returns - first thread or NULL |
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| 293 | */ |
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| 294 | |
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| 295 | Thread_Control *_Thread_queue_First( |
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| 296 | Thread_queue_Control *the_thread_queue |
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| 297 | ) |
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| 298 | { |
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| 299 | Thread_Control *the_thread; |
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| 300 | |
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| 301 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 302 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 303 | the_thread = _Thread_queue_First_fifo( the_thread_queue ); |
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| 304 | break; |
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[7f6a24ab] | 305 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 306 | the_thread = _Thread_queue_First_priority( the_thread_queue ); |
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| 307 | break; |
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| 308 | default: /* this is only to prevent warnings */ |
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| 309 | the_thread = NULL; |
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| 310 | break; |
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| 311 | } |
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| 312 | |
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| 313 | return the_thread; |
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| 314 | } |
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| 315 | |
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| 316 | /*PAGE |
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| 317 | * |
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| 318 | * _Thread_queue_Timeout |
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| 319 | * |
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| 320 | * This routine processes a thread which timeouts while waiting on |
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| 321 | * a thread queue. It is called by the watchdog handler. |
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| 322 | * |
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| 323 | * Input parameters: |
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| 324 | * id - thread id |
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| 325 | * |
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| 326 | * Output parameters: NONE |
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| 327 | */ |
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| 328 | |
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| 329 | void _Thread_queue_Timeout( |
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| 330 | Objects_Id id, |
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| 331 | void *ignored |
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| 332 | ) |
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| 333 | { |
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| 334 | Thread_Control *the_thread; |
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| 335 | Objects_Locations location; |
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| 336 | |
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| 337 | the_thread = _Thread_Get( id, &location ); |
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| 338 | switch ( location ) { |
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| 339 | case OBJECTS_ERROR: |
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| 340 | case OBJECTS_REMOTE: /* impossible */ |
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| 341 | break; |
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| 342 | case OBJECTS_LOCAL: |
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[3a4ae6c] | 343 | the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status; |
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[ac7d5ef0] | 344 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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| 345 | _Thread_Unnest_dispatch(); |
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| 346 | break; |
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| 347 | } |
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| 348 | } |
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| 349 | |
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| 350 | /*PAGE |
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| 351 | * |
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| 352 | * _Thread_queue_Enqueue_fifo |
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| 353 | * |
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| 354 | * This routine blocks a thread, places it on a thread, and optionally |
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| 355 | * starts a timeout timer. |
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| 356 | * |
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| 357 | * Input parameters: |
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| 358 | * the_thread_queue - pointer to threadq |
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| 359 | * the_thread - pointer to the thread to block |
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| 360 | * timeout - interval to wait |
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| 361 | * |
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| 362 | * Output parameters: NONE |
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| 363 | * |
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| 364 | * INTERRUPT LATENCY: |
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| 365 | * only case |
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| 366 | */ |
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| 367 | |
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| 368 | void _Thread_queue_Enqueue_fifo ( |
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| 369 | Thread_queue_Control *the_thread_queue, |
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| 370 | Thread_Control *the_thread, |
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[3a4ae6c] | 371 | Watchdog_Interval timeout |
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[ac7d5ef0] | 372 | ) |
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| 373 | { |
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| 374 | ISR_Level level; |
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| 375 | |
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| 376 | _ISR_Disable( level ); |
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| 377 | if ( the_thread_queue->sync == TRUE ) { |
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| 378 | the_thread_queue->sync = FALSE; |
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| 379 | |
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| 380 | _Chain_Append_unprotected( |
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| 381 | &the_thread_queue->Queues.Fifo, |
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| 382 | &the_thread->Object.Node |
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| 383 | ); |
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| 384 | |
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[3a4ae6c] | 385 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
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[ac7d5ef0] | 386 | _Watchdog_Activate( &the_thread->Timer ); |
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| 387 | |
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| 388 | _ISR_Enable( level ); |
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| 389 | return; |
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| 390 | } |
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| 391 | |
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| 392 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 393 | _ISR_Enable( level ); |
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| 394 | _Thread_Unblock( the_thread ); |
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| 395 | } else { |
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| 396 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 397 | _ISR_Enable( level ); |
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| 398 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 399 | _Thread_Unblock( the_thread ); |
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| 400 | } |
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| 401 | |
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| 402 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
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| 403 | _Thread_MP_Free_proxy( the_thread ); |
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| 404 | |
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| 405 | } |
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| 406 | |
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| 407 | /*PAGE |
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| 408 | * |
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| 409 | * _Thread_queue_Dequeue_fifo |
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| 410 | * |
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| 411 | * This routine removes a thread from the specified threadq. |
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| 412 | * |
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| 413 | * Input parameters: |
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| 414 | * the_thread_queue - pointer to threadq |
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| 415 | * |
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| 416 | * Output parameters: |
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| 417 | * returns - thread dequeued or NULL |
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| 418 | * |
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| 419 | * INTERRUPT LATENCY: |
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| 420 | * check sync |
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[3a4ae6c] | 421 | * FIFO |
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[ac7d5ef0] | 422 | */ |
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| 423 | |
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| 424 | Thread_Control *_Thread_queue_Dequeue_fifo( |
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| 425 | Thread_queue_Control *the_thread_queue |
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| 426 | ) |
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| 427 | { |
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| 428 | ISR_Level level; |
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| 429 | Thread_Control *the_thread; |
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| 430 | |
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| 431 | _ISR_Disable( level ); |
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| 432 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) ) { |
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| 433 | |
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| 434 | the_thread = (Thread_Control *) |
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| 435 | _Chain_Get_first_unprotected( &the_thread_queue->Queues.Fifo ); |
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| 436 | |
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| 437 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 438 | _ISR_Enable( level ); |
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| 439 | _Thread_Unblock( the_thread ); |
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| 440 | } else { |
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| 441 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 442 | _ISR_Enable( level ); |
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| 443 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 444 | _Thread_Unblock( the_thread ); |
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| 445 | } |
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| 446 | |
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| 447 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
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| 448 | _Thread_MP_Free_proxy( the_thread ); |
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| 449 | |
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| 450 | return( the_thread ); |
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| 451 | } |
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| 452 | _ISR_Enable( level ); |
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| 453 | return( NULL ); |
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| 454 | } |
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| 455 | |
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| 456 | /*PAGE |
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| 457 | * |
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| 458 | * _Thread_queue_Extract_fifo |
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| 459 | * |
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| 460 | * This routine removes a specific thread from the specified threadq, |
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| 461 | * deletes any timeout, and unblocks the thread. |
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| 462 | * |
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| 463 | * Input parameters: |
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| 464 | * the_thread_queue - pointer to a threadq header |
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| 465 | * the_thread - pointer to the thread to block |
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| 466 | * |
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| 467 | * Output parameters: NONE |
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| 468 | * |
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| 469 | * INTERRUPT LATENCY: |
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| 470 | * EXTRACT_FIFO |
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| 471 | */ |
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| 472 | |
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| 473 | void _Thread_queue_Extract_fifo( |
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| 474 | Thread_queue_Control *the_thread_queue, |
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| 475 | Thread_Control *the_thread |
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| 476 | ) |
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| 477 | { |
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| 478 | ISR_Level level; |
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| 479 | |
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| 480 | _ISR_Disable( level ); |
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| 481 | |
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| 482 | if ( !_States_Is_waiting_on_thread_queue( the_thread->current_state ) ) { |
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| 483 | _ISR_Enable( level ); |
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| 484 | return; |
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| 485 | } |
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| 486 | |
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| 487 | _Chain_Extract_unprotected( &the_thread->Object.Node ); |
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| 488 | |
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| 489 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 490 | _ISR_Enable( level ); |
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| 491 | } else { |
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| 492 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 493 | _ISR_Enable( level ); |
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| 494 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 495 | } |
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| 496 | |
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[7f6a24ab] | 497 | _Thread_Unblock( the_thread ); |
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| 498 | |
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[ac7d5ef0] | 499 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
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| 500 | _Thread_MP_Free_proxy( the_thread ); |
---|
[7f6a24ab] | 501 | |
---|
[ac7d5ef0] | 502 | } |
---|
| 503 | |
---|
| 504 | /*PAGE |
---|
| 505 | * |
---|
| 506 | * _Thread_queue_First_fifo |
---|
| 507 | * |
---|
| 508 | * This routines returns a pointer to the first thread on the |
---|
| 509 | * specified threadq. |
---|
| 510 | * |
---|
| 511 | * Input parameters: |
---|
| 512 | * the_thread_queue - pointer to threadq |
---|
| 513 | * |
---|
| 514 | * Output parameters: |
---|
| 515 | * returns - first thread or NULL |
---|
| 516 | */ |
---|
| 517 | |
---|
| 518 | Thread_Control *_Thread_queue_First_fifo( |
---|
| 519 | Thread_queue_Control *the_thread_queue |
---|
| 520 | ) |
---|
| 521 | { |
---|
| 522 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) ) |
---|
| 523 | return (Thread_Control *) the_thread_queue->Queues.Fifo.first; |
---|
| 524 | |
---|
| 525 | return NULL; |
---|
| 526 | } |
---|
| 527 | |
---|
| 528 | /*PAGE |
---|
| 529 | * |
---|
| 530 | * _Thread_queue_Enqueue_priority |
---|
| 531 | * |
---|
| 532 | * This routine blocks a thread, places it on a thread, and optionally |
---|
| 533 | * starts a timeout timer. |
---|
| 534 | * |
---|
| 535 | * Input parameters: |
---|
| 536 | * the_thread_queue - pointer to threadq |
---|
| 537 | * thread - thread to insert |
---|
| 538 | * timeout - timeout interval in ticks |
---|
| 539 | * |
---|
| 540 | * Output parameters: NONE |
---|
| 541 | * |
---|
| 542 | * INTERRUPT LATENCY: |
---|
| 543 | * forward less than |
---|
| 544 | * forward equal |
---|
| 545 | */ |
---|
| 546 | |
---|
| 547 | void _Thread_queue_Enqueue_priority( |
---|
| 548 | Thread_queue_Control *the_thread_queue, |
---|
| 549 | Thread_Control *the_thread, |
---|
[3a4ae6c] | 550 | Watchdog_Interval timeout |
---|
[ac7d5ef0] | 551 | ) |
---|
| 552 | { |
---|
[7f6a24ab] | 553 | Priority_Control search_priority; |
---|
| 554 | Thread_Control *search_thread; |
---|
| 555 | ISR_Level level; |
---|
| 556 | Chain_Control *header; |
---|
| 557 | unsigned32 header_index; |
---|
| 558 | Chain_Node *the_node; |
---|
| 559 | Chain_Node *next_node; |
---|
| 560 | Chain_Node *previous_node; |
---|
| 561 | Chain_Node *search_node; |
---|
| 562 | Priority_Control priority; |
---|
| 563 | States_Control block_state; |
---|
[ac7d5ef0] | 564 | |
---|
| 565 | _Chain_Initialize_empty( &the_thread->Wait.Block2n ); |
---|
| 566 | |
---|
| 567 | priority = the_thread->current_priority; |
---|
| 568 | header_index = _Thread_queue_Header_number( priority ); |
---|
| 569 | header = &the_thread_queue->Queues.Priority[ header_index ]; |
---|
| 570 | block_state = the_thread_queue->state; |
---|
| 571 | |
---|
| 572 | if ( _Thread_queue_Is_reverse_search( priority ) ) |
---|
| 573 | goto restart_reverse_search; |
---|
| 574 | |
---|
| 575 | restart_forward_search: |
---|
[3a4ae6c] | 576 | search_priority = PRIORITY_MINIMUM - 1; |
---|
[ac7d5ef0] | 577 | _ISR_Disable( level ); |
---|
| 578 | search_thread = (Thread_Control *) header->first; |
---|
| 579 | while ( !_Chain_Is_tail( header, (Chain_Node *)search_thread ) ) { |
---|
| 580 | search_priority = search_thread->current_priority; |
---|
| 581 | if ( priority <= search_priority ) |
---|
| 582 | break; |
---|
| 583 | |
---|
| 584 | #if ( CPU_UNROLL_ENQUEUE_PRIORITY == TRUE ) |
---|
| 585 | search_thread = (Thread_Control *) search_thread->Object.Node.next; |
---|
| 586 | if ( _Chain_Is_tail( header, (Chain_Node *)search_thread ) ) |
---|
| 587 | break; |
---|
| 588 | search_priority = search_thread->current_priority; |
---|
| 589 | if ( priority <= search_priority ) |
---|
| 590 | break; |
---|
| 591 | #endif |
---|
| 592 | _ISR_Flash( level ); |
---|
| 593 | if ( !_States_Are_set( search_thread->current_state, block_state) ) { |
---|
| 594 | _ISR_Enable( level ); |
---|
| 595 | goto restart_forward_search; |
---|
| 596 | } |
---|
| 597 | search_thread = |
---|
| 598 | (Thread_Control *)search_thread->Object.Node.next; |
---|
| 599 | } |
---|
| 600 | if ( the_thread_queue->sync == FALSE ) |
---|
| 601 | goto syncronize; |
---|
| 602 | |
---|
| 603 | the_thread_queue->sync = FALSE; |
---|
[3a4ae6c] | 604 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
---|
[ac7d5ef0] | 605 | _Watchdog_Activate( &the_thread->Timer ); |
---|
| 606 | |
---|
| 607 | if ( priority == search_priority ) |
---|
| 608 | goto equal_priority; |
---|
| 609 | |
---|
| 610 | search_node = (Chain_Node *) search_thread; |
---|
| 611 | previous_node = search_node->previous; |
---|
| 612 | the_node = (Chain_Node *) the_thread; |
---|
| 613 | |
---|
| 614 | the_node->next = search_node; |
---|
| 615 | the_node->previous = previous_node; |
---|
| 616 | previous_node->next = the_node; |
---|
| 617 | search_node->previous = the_node; |
---|
| 618 | _ISR_Enable( level ); |
---|
| 619 | return; |
---|
| 620 | |
---|
| 621 | restart_reverse_search: |
---|
[3a4ae6c] | 622 | search_priority = PRIORITY_MAXIMUM + 1; |
---|
[ac7d5ef0] | 623 | |
---|
| 624 | _ISR_Disable( level ); |
---|
| 625 | search_thread = (Thread_Control *) header->last; |
---|
| 626 | while ( !_Chain_Is_head( header, (Chain_Node *)search_thread ) ) { |
---|
| 627 | search_priority = search_thread->current_priority; |
---|
| 628 | if ( priority >= search_priority ) |
---|
| 629 | break; |
---|
| 630 | #if ( CPU_UNROLL_ENQUEUE_PRIORITY == TRUE ) |
---|
| 631 | search_thread = (Thread_Control *) search_thread->Object.Node.previous; |
---|
| 632 | if ( _Chain_Is_head( header, (Chain_Node *)search_thread ) ) |
---|
| 633 | break; |
---|
| 634 | search_priority = search_thread->current_priority; |
---|
| 635 | if ( priority >= search_priority ) |
---|
| 636 | break; |
---|
| 637 | #endif |
---|
| 638 | _ISR_Flash( level ); |
---|
| 639 | if ( !_States_Are_set( search_thread->current_state, block_state) ) { |
---|
| 640 | _ISR_Enable( level ); |
---|
| 641 | goto restart_reverse_search; |
---|
| 642 | } |
---|
| 643 | search_thread = (Thread_Control *) |
---|
| 644 | search_thread->Object.Node.previous; |
---|
| 645 | } |
---|
| 646 | if ( !the_thread_queue->sync ) |
---|
| 647 | goto syncronize; |
---|
| 648 | |
---|
| 649 | the_thread_queue->sync = FALSE; |
---|
[3a4ae6c] | 650 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
---|
[ac7d5ef0] | 651 | _Watchdog_Activate( &the_thread->Timer ); |
---|
| 652 | |
---|
| 653 | if ( priority == search_priority ) |
---|
| 654 | goto equal_priority; |
---|
| 655 | |
---|
| 656 | search_node = (Chain_Node *) search_thread; |
---|
| 657 | next_node = search_node->next; |
---|
| 658 | the_node = (Chain_Node *) the_thread; |
---|
| 659 | |
---|
| 660 | the_node->next = next_node; |
---|
| 661 | the_node->previous = search_node; |
---|
| 662 | search_node->next = the_node; |
---|
| 663 | next_node->previous = the_node; |
---|
| 664 | _ISR_Enable( level ); |
---|
| 665 | return; |
---|
| 666 | |
---|
| 667 | equal_priority: /* add at end of priority group */ |
---|
| 668 | search_node = _Chain_Tail( &search_thread->Wait.Block2n ); |
---|
| 669 | previous_node = search_node->previous; |
---|
| 670 | the_node = (Chain_Node *) the_thread; |
---|
| 671 | |
---|
| 672 | the_node->next = search_node; |
---|
| 673 | the_node->previous = previous_node; |
---|
| 674 | previous_node->next = the_node; |
---|
| 675 | search_node->previous = the_node; |
---|
| 676 | _ISR_Enable( level ); |
---|
| 677 | return; |
---|
| 678 | |
---|
| 679 | syncronize: |
---|
| 680 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 681 | _ISR_Enable( level ); |
---|
| 682 | _Thread_Unblock( the_thread ); |
---|
| 683 | } else { |
---|
| 684 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 685 | _ISR_Enable( level ); |
---|
| 686 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 687 | _Thread_Unblock( the_thread ); |
---|
| 688 | } |
---|
| 689 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 690 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 691 | } |
---|
| 692 | |
---|
| 693 | /*PAGE |
---|
| 694 | * |
---|
| 695 | * _Thread_queue_Dequeue_priority |
---|
| 696 | * |
---|
[3a4ae6c] | 697 | * This routine removes a thread from the specified PRIORITY based |
---|
[ac7d5ef0] | 698 | * threadq, unblocks it, and cancels its timeout timer. |
---|
| 699 | * |
---|
| 700 | * Input parameters: |
---|
| 701 | * the_thread_queue - pointer to thread queue |
---|
| 702 | * |
---|
| 703 | * Output parameters: |
---|
| 704 | * returns - thread dequeued or NULL |
---|
| 705 | * |
---|
| 706 | * INTERRUPT LATENCY: |
---|
| 707 | * only case |
---|
| 708 | */ |
---|
| 709 | |
---|
| 710 | Thread_Control *_Thread_queue_Dequeue_priority( |
---|
| 711 | Thread_queue_Control *the_thread_queue |
---|
| 712 | ) |
---|
| 713 | { |
---|
| 714 | unsigned32 index; |
---|
| 715 | ISR_Level level; |
---|
| 716 | Thread_Control *the_thread; |
---|
| 717 | Thread_Control *new_first_thread; |
---|
| 718 | Chain_Node *new_first_node; |
---|
| 719 | Chain_Node *new_second_node; |
---|
| 720 | Chain_Node *last_node; |
---|
| 721 | Chain_Node *next_node; |
---|
| 722 | Chain_Node *previous_node; |
---|
| 723 | |
---|
| 724 | for( index=0 ; |
---|
| 725 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
---|
| 726 | index++ ) { |
---|
| 727 | _ISR_Disable( level ); |
---|
| 728 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) ) { |
---|
| 729 | the_thread = (Thread_Control *) |
---|
| 730 | the_thread_queue->Queues.Priority[ index ].first; |
---|
| 731 | goto dequeue; |
---|
| 732 | } |
---|
| 733 | _ISR_Enable( level ); |
---|
| 734 | } |
---|
| 735 | return NULL; |
---|
| 736 | |
---|
| 737 | dequeue: |
---|
| 738 | new_first_node = the_thread->Wait.Block2n.first; |
---|
| 739 | new_first_thread = (Thread_Control *) new_first_node; |
---|
| 740 | next_node = the_thread->Object.Node.next; |
---|
| 741 | previous_node = the_thread->Object.Node.previous; |
---|
| 742 | |
---|
| 743 | if ( !_Chain_Is_empty( &the_thread->Wait.Block2n ) ) { |
---|
| 744 | last_node = the_thread->Wait.Block2n.last; |
---|
| 745 | new_second_node = new_first_node->next; |
---|
| 746 | |
---|
| 747 | previous_node->next = new_first_node; |
---|
| 748 | next_node->previous = new_first_node; |
---|
| 749 | new_first_node->next = next_node; |
---|
| 750 | new_first_node->previous = previous_node; |
---|
| 751 | |
---|
| 752 | if ( !_Chain_Has_only_one_node( &the_thread->Wait.Block2n ) ) { |
---|
| 753 | /* > two threads on 2-n */ |
---|
| 754 | new_second_node->previous = |
---|
| 755 | _Chain_Head( &new_first_thread->Wait.Block2n ); |
---|
| 756 | |
---|
| 757 | new_first_thread->Wait.Block2n.first = new_second_node; |
---|
| 758 | new_first_thread->Wait.Block2n.last = last_node; |
---|
| 759 | |
---|
| 760 | last_node->next = _Chain_Tail( &new_first_thread->Wait.Block2n ); |
---|
| 761 | } |
---|
| 762 | } else { |
---|
| 763 | previous_node->next = next_node; |
---|
| 764 | next_node->previous = previous_node; |
---|
| 765 | } |
---|
| 766 | |
---|
| 767 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 768 | _ISR_Enable( level ); |
---|
| 769 | _Thread_Unblock( the_thread ); |
---|
| 770 | } else { |
---|
| 771 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 772 | _ISR_Enable( level ); |
---|
| 773 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 774 | _Thread_Unblock( the_thread ); |
---|
| 775 | } |
---|
| 776 | |
---|
| 777 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 778 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 779 | return( the_thread ); |
---|
| 780 | } |
---|
| 781 | |
---|
| 782 | /*PAGE |
---|
| 783 | * |
---|
| 784 | * _Thread_queue_Extract_priority |
---|
| 785 | * |
---|
| 786 | * This routine removes a specific thread from the specified threadq, |
---|
| 787 | * deletes any timeout, and unblocks the thread. |
---|
| 788 | * |
---|
| 789 | * Input parameters: |
---|
| 790 | * the_thread_queue - pointer to a threadq header |
---|
| 791 | * the_thread - pointer to a thread control block |
---|
| 792 | * |
---|
| 793 | * Output parameters: NONE |
---|
| 794 | * |
---|
| 795 | * INTERRUPT LATENCY: |
---|
| 796 | * EXTRACT_PRIORITY |
---|
| 797 | */ |
---|
| 798 | |
---|
| 799 | void _Thread_queue_Extract_priority( |
---|
| 800 | Thread_queue_Control *the_thread_queue, |
---|
| 801 | Thread_Control *the_thread |
---|
| 802 | ) |
---|
| 803 | { |
---|
| 804 | ISR_Level level; |
---|
| 805 | Chain_Node *the_node; |
---|
| 806 | Chain_Node *next_node; |
---|
| 807 | Chain_Node *previous_node; |
---|
| 808 | Thread_Control *new_first_thread; |
---|
| 809 | Chain_Node *new_first_node; |
---|
| 810 | Chain_Node *new_second_node; |
---|
| 811 | Chain_Node *last_node; |
---|
| 812 | |
---|
| 813 | the_node = (Chain_Node *) the_thread; |
---|
| 814 | _ISR_Disable( level ); |
---|
| 815 | if ( _States_Is_waiting_on_thread_queue( the_thread->current_state ) ) { |
---|
| 816 | next_node = the_node->next; |
---|
| 817 | previous_node = the_node->previous; |
---|
| 818 | |
---|
| 819 | if ( !_Chain_Is_empty( &the_thread->Wait.Block2n ) ) { |
---|
| 820 | new_first_node = the_thread->Wait.Block2n.first; |
---|
| 821 | new_first_thread = (Thread_Control *) new_first_node; |
---|
| 822 | last_node = the_thread->Wait.Block2n.last; |
---|
| 823 | new_second_node = new_first_node->next; |
---|
| 824 | |
---|
| 825 | previous_node->next = new_first_node; |
---|
| 826 | next_node->previous = new_first_node; |
---|
| 827 | new_first_node->next = next_node; |
---|
| 828 | new_first_node->previous = previous_node; |
---|
| 829 | |
---|
| 830 | if ( !_Chain_Has_only_one_node( &the_thread->Wait.Block2n ) ) { |
---|
| 831 | /* > two threads on 2-n */ |
---|
| 832 | new_second_node->previous = |
---|
| 833 | _Chain_Head( &new_first_thread->Wait.Block2n ); |
---|
| 834 | new_first_thread->Wait.Block2n.first = new_second_node; |
---|
| 835 | |
---|
| 836 | new_first_thread->Wait.Block2n.last = last_node; |
---|
| 837 | last_node->next = _Chain_Tail( &new_first_thread->Wait.Block2n ); |
---|
| 838 | } |
---|
| 839 | } else { |
---|
| 840 | previous_node->next = next_node; |
---|
| 841 | next_node->previous = previous_node; |
---|
| 842 | } |
---|
| 843 | |
---|
| 844 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 845 | _ISR_Enable( level ); |
---|
| 846 | _Thread_Unblock( the_thread ); |
---|
| 847 | } else { |
---|
| 848 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 849 | _ISR_Enable( level ); |
---|
| 850 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 851 | _Thread_Unblock( the_thread ); |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 855 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 856 | } |
---|
| 857 | else |
---|
| 858 | _ISR_Enable( level ); |
---|
| 859 | } |
---|
| 860 | |
---|
| 861 | /*PAGE |
---|
| 862 | * |
---|
| 863 | * _Thread_queue_First_priority |
---|
| 864 | * |
---|
| 865 | * This routines returns a pointer to the first thread on the |
---|
| 866 | * specified threadq. |
---|
| 867 | * |
---|
| 868 | * Input parameters: |
---|
| 869 | * the_thread_queue - pointer to thread queue |
---|
| 870 | * |
---|
| 871 | * Output parameters: |
---|
| 872 | * returns - first thread or NULL |
---|
| 873 | */ |
---|
| 874 | |
---|
| 875 | Thread_Control *_Thread_queue_First_priority ( |
---|
| 876 | Thread_queue_Control *the_thread_queue |
---|
| 877 | ) |
---|
| 878 | { |
---|
| 879 | unsigned32 index; |
---|
| 880 | |
---|
| 881 | for( index=0 ; |
---|
| 882 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
---|
| 883 | index++ ) { |
---|
| 884 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) ) |
---|
| 885 | return (Thread_Control *) |
---|
| 886 | the_thread_queue->Queues.Priority[ index ].first; |
---|
| 887 | } |
---|
| 888 | return NULL; |
---|
| 889 | } |
---|