[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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[3a4ae6c] | 17 | #include <rtems/core/chain.h> |
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| 18 | #include <rtems/core/isr.h> |
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| 19 | #include <rtems/core/object.h> |
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| 20 | #include <rtems/core/states.h> |
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| 21 | #include <rtems/core/thread.h> |
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| 22 | #include <rtems/core/threadq.h> |
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| 23 | #include <rtems/core/tqdata.h> |
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| 24 | |
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| 25 | #include <rtems/rtems/status.h> |
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[ac7d5ef0] | 26 | |
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| 27 | /*PAGE |
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| 28 | * |
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| 29 | * _Thread_queue_Initialize |
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| 30 | * |
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| 31 | * This routine initializes the specified threadq. |
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| 32 | * |
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| 33 | * Input parameters: |
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[3a4ae6c] | 34 | * the_thread_queue - pointer to a threadq header |
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| 35 | * the_class - class of the object to which this belongs |
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| 36 | * discipline - queueing discipline |
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| 37 | * state - state of waiting threads |
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| 38 | * proxy_extract_callout - MP specific callout |
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| 39 | * timeout_status - return on a timeout |
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[ac7d5ef0] | 40 | * |
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| 41 | * Output parameters: NONE |
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| 42 | */ |
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| 43 | |
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| 44 | void _Thread_queue_Initialize( |
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[7f6a24ab] | 45 | Thread_queue_Control *the_thread_queue, |
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| 46 | Objects_Classes the_class, |
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| 47 | Thread_queue_Disciplines the_discipline, |
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| 48 | States_Control state, |
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[3a4ae6c] | 49 | Thread_queue_Extract_callout proxy_extract_callout, |
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| 50 | unsigned32 timeout_status |
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[ac7d5ef0] | 51 | ) |
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| 52 | { |
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| 53 | unsigned32 index; |
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| 54 | |
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[7f6a24ab] | 55 | _Thread_queue_Extract_table[ the_class ] = proxy_extract_callout; |
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| 56 | |
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[3a4ae6c] | 57 | the_thread_queue->state = state; |
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| 58 | the_thread_queue->discipline = the_discipline; |
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| 59 | the_thread_queue->timeout_status = timeout_status; |
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[ac7d5ef0] | 60 | |
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[7f6a24ab] | 61 | switch ( the_discipline ) { |
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| 62 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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| 63 | _Chain_Initialize_empty( &the_thread_queue->Queues.Fifo ); |
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| 64 | break; |
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| 65 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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| 66 | for( index=0 ; |
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| 67 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
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| 68 | index++) |
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| 69 | _Chain_Initialize_empty( &the_thread_queue->Queues.Priority[index] ); |
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| 70 | break; |
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| 71 | } |
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[ac7d5ef0] | 72 | |
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| 73 | } |
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| 74 | |
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| 75 | /*PAGE |
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| 76 | * |
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| 77 | * _Thread_queue_Enqueue |
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| 78 | * |
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| 79 | * This routine blocks a thread, places it on a thread, and optionally |
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| 80 | * starts a timeout timer. |
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| 81 | * |
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| 82 | * Input parameters: |
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| 83 | * the_thread_queue - pointer to threadq |
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| 84 | * timeout - interval to wait |
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| 85 | * |
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| 86 | * Output parameters: NONE |
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| 87 | * |
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| 88 | * INTERRUPT LATENCY: |
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| 89 | * only case |
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| 90 | */ |
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| 91 | |
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| 92 | void _Thread_queue_Enqueue( |
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| 93 | Thread_queue_Control *the_thread_queue, |
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[3a4ae6c] | 94 | Watchdog_Interval timeout |
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[ac7d5ef0] | 95 | ) |
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| 96 | { |
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| 97 | Thread_Control *the_thread; |
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| 98 | |
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| 99 | the_thread = _Thread_Executing; |
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| 100 | |
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[3a4ae6c] | 101 | if ( _Thread_MP_Is_receive( the_thread ) && the_thread->receive_packet ) |
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[ac7d5ef0] | 102 | the_thread = _Thread_MP_Allocate_proxy( the_thread_queue->state ); |
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| 103 | else |
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| 104 | _Thread_Set_state( the_thread, the_thread_queue->state ); |
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| 105 | |
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| 106 | if ( timeout ) { |
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| 107 | _Watchdog_Initialize( |
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| 108 | &the_thread->Timer, |
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| 109 | _Thread_queue_Timeout, |
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| 110 | the_thread->Object.id, |
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| 111 | NULL |
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| 112 | ); |
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| 113 | |
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| 114 | _Watchdog_Insert_ticks( |
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| 115 | &the_thread->Timer, |
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| 116 | timeout, |
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| 117 | WATCHDOG_NO_ACTIVATE |
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| 118 | ); |
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| 119 | } |
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| 120 | |
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| 121 | switch( the_thread_queue->discipline ) { |
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[7f6a24ab] | 122 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 123 | _Thread_queue_Enqueue_fifo( the_thread_queue, the_thread, timeout ); |
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| 124 | break; |
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[7f6a24ab] | 125 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 126 | _Thread_queue_Enqueue_priority( |
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| 127 | the_thread_queue, the_thread, timeout ); |
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| 128 | break; |
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| 129 | } |
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| 130 | } |
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| 131 | |
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| 132 | /*PAGE |
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| 133 | * |
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| 134 | * _Thread_queue_Dequeue |
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| 135 | * |
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| 136 | * This routine removes a thread from the specified threadq. If the |
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[3a4ae6c] | 137 | * threadq discipline is FIFO, it unblocks a thread, and cancels its |
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[ac7d5ef0] | 138 | * timeout timer. Priority discipline is processed elsewhere. |
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| 139 | * |
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| 140 | * Input parameters: |
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| 141 | * the_thread_queue - pointer to threadq |
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| 142 | * |
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| 143 | * Output parameters: |
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| 144 | * returns - thread dequeued or NULL |
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| 145 | * |
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| 146 | * INTERRUPT LATENCY: |
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| 147 | * check sync |
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| 148 | */ |
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| 149 | |
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| 150 | Thread_Control *_Thread_queue_Dequeue( |
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| 151 | Thread_queue_Control *the_thread_queue |
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| 152 | ) |
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| 153 | { |
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| 154 | Thread_Control *the_thread; |
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| 155 | ISR_Level level; |
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| 156 | |
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| 157 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 158 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 159 | the_thread = _Thread_queue_Dequeue_fifo( the_thread_queue ); |
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| 160 | break; |
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[7f6a24ab] | 161 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 162 | the_thread = _Thread_queue_Dequeue_priority( the_thread_queue ); |
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| 163 | break; |
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| 164 | default: /* this is only to prevent warnings */ |
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| 165 | the_thread = NULL; |
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| 166 | break; |
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| 167 | } |
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| 168 | |
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| 169 | if ( !_Thread_Is_null( the_thread ) ) |
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| 170 | return( the_thread ); |
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| 171 | |
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| 172 | _ISR_Disable( level ); |
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| 173 | if ( the_thread_queue->sync == FALSE ) { |
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| 174 | _ISR_Enable( level ); |
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| 175 | return( NULL ); |
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| 176 | } |
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| 177 | |
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| 178 | the_thread_queue->sync = FALSE; |
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| 179 | _ISR_Enable( level ); |
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| 180 | return( _Thread_Executing ); |
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| 181 | } |
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| 182 | |
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[7f6a24ab] | 183 | /*PAGE |
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| 184 | * |
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| 185 | * _Thread_queue_Extract_with_proxy |
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| 186 | * |
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| 187 | * This routine extracts the_thread from the_thread_queue |
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| 188 | * and insures that if there is a proxy for this task on |
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| 189 | * another node, it is also dealt with. |
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| 190 | * |
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| 191 | * XXX |
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| 192 | */ |
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| 193 | |
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| 194 | boolean _Thread_queue_Extract_with_proxy( |
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| 195 | Thread_Control *the_thread |
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| 196 | ) |
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| 197 | { |
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| 198 | States_Control state; |
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| 199 | Objects_Classes the_class; |
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| 200 | Thread_queue_Extract_callout proxy_extract_callout; |
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| 201 | |
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| 202 | state = the_thread->current_state; |
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| 203 | |
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| 204 | if ( _States_Is_waiting_on_thread_queue( state ) ) { |
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| 205 | if ( _States_Is_waiting_for_rpc_reply( state ) && |
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| 206 | _States_Is_locally_blocked( state ) ) { |
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| 207 | |
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[3a4ae6c] | 208 | the_class = _Objects_Get_class( the_thread->Wait.id ); |
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[7f6a24ab] | 209 | |
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| 210 | proxy_extract_callout = _Thread_queue_Extract_table[ the_class ]; |
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| 211 | |
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| 212 | if ( proxy_extract_callout ) |
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| 213 | (*proxy_extract_callout)( the_thread ); |
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| 214 | } |
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| 215 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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| 216 | |
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| 217 | return TRUE; |
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| 218 | } |
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| 219 | return FALSE; |
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| 220 | } |
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| 221 | |
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[ac7d5ef0] | 222 | /*PAGE |
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| 223 | * |
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| 224 | * _Thread_queue_Extract |
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| 225 | * |
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| 226 | * This routine removes a specific thread from the specified threadq, |
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| 227 | * deletes any timeout, and unblocks the thread. |
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| 228 | * |
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| 229 | * Input parameters: |
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| 230 | * the_thread_queue - pointer to a threadq header |
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| 231 | * the_thread - pointer to a thread control block |
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| 232 | * |
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| 233 | * Output parameters: NONE |
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| 234 | * |
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| 235 | * INTERRUPT LATENCY: NONE |
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| 236 | */ |
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| 237 | |
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| 238 | void _Thread_queue_Extract( |
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| 239 | Thread_queue_Control *the_thread_queue, |
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| 240 | Thread_Control *the_thread |
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| 241 | ) |
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| 242 | { |
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| 243 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 244 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 245 | _Thread_queue_Extract_fifo( the_thread_queue, the_thread ); |
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| 246 | break; |
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[7f6a24ab] | 247 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 248 | _Thread_queue_Extract_priority( the_thread_queue, the_thread ); |
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| 249 | break; |
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| 250 | } |
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| 251 | } |
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| 252 | |
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| 253 | /*PAGE |
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| 254 | * |
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| 255 | * _Thread_queue_Flush |
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| 256 | * |
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| 257 | * This kernel routine flushes the given thread queue. |
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| 258 | * |
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| 259 | * Input parameters: |
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[3a4ae6c] | 260 | * the_thread_queue - pointer to threadq to be flushed |
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| 261 | * remote_extract_callout - pointer to routine which extracts a remote thread |
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| 262 | * status - status to return to the thread |
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[ac7d5ef0] | 263 | * |
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| 264 | * Output parameters: NONE |
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| 265 | */ |
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| 266 | |
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| 267 | void _Thread_queue_Flush( |
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| 268 | Thread_queue_Control *the_thread_queue, |
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[3a4ae6c] | 269 | Thread_queue_Flush_callout remote_extract_callout, |
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| 270 | unsigned32 status |
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[ac7d5ef0] | 271 | ) |
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| 272 | { |
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| 273 | Thread_Control *the_thread; |
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| 274 | |
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| 275 | while ( (the_thread = _Thread_queue_Dequeue( the_thread_queue )) ) { |
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| 276 | if ( _Objects_Is_local_id( the_thread->Object.id ) ) |
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[3a4ae6c] | 277 | the_thread->Wait.return_code = status; |
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[ac7d5ef0] | 278 | else |
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| 279 | ( *remote_extract_callout )( the_thread ); |
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| 280 | } |
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| 281 | } |
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| 282 | |
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| 283 | /*PAGE |
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| 284 | * |
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| 285 | * _Thread_queue_First |
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| 286 | * |
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| 287 | * This routines returns a pointer to the first thread on the |
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| 288 | * specified threadq. |
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| 289 | * |
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| 290 | * Input parameters: |
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| 291 | * the_thread_queue - pointer to thread queue |
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| 292 | * |
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| 293 | * Output parameters: |
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| 294 | * returns - first thread or NULL |
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| 295 | */ |
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| 296 | |
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| 297 | Thread_Control *_Thread_queue_First( |
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| 298 | Thread_queue_Control *the_thread_queue |
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| 299 | ) |
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| 300 | { |
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| 301 | Thread_Control *the_thread; |
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| 302 | |
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| 303 | switch ( the_thread_queue->discipline ) { |
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[7f6a24ab] | 304 | case THREAD_QUEUE_DISCIPLINE_FIFO: |
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[ac7d5ef0] | 305 | the_thread = _Thread_queue_First_fifo( the_thread_queue ); |
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| 306 | break; |
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[7f6a24ab] | 307 | case THREAD_QUEUE_DISCIPLINE_PRIORITY: |
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[ac7d5ef0] | 308 | the_thread = _Thread_queue_First_priority( the_thread_queue ); |
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| 309 | break; |
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| 310 | default: /* this is only to prevent warnings */ |
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| 311 | the_thread = NULL; |
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| 312 | break; |
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| 313 | } |
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| 314 | |
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| 315 | return the_thread; |
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| 316 | } |
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| 317 | |
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| 318 | /*PAGE |
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| 319 | * |
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| 320 | * _Thread_queue_Timeout |
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| 321 | * |
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| 322 | * This routine processes a thread which timeouts while waiting on |
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| 323 | * a thread queue. It is called by the watchdog handler. |
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| 324 | * |
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| 325 | * Input parameters: |
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| 326 | * id - thread id |
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| 327 | * |
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| 328 | * Output parameters: NONE |
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| 329 | */ |
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| 330 | |
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| 331 | void _Thread_queue_Timeout( |
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| 332 | Objects_Id id, |
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| 333 | void *ignored |
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| 334 | ) |
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| 335 | { |
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| 336 | Thread_Control *the_thread; |
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| 337 | Objects_Locations location; |
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| 338 | |
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| 339 | the_thread = _Thread_Get( id, &location ); |
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| 340 | switch ( location ) { |
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| 341 | case OBJECTS_ERROR: |
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| 342 | case OBJECTS_REMOTE: /* impossible */ |
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| 343 | break; |
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| 344 | case OBJECTS_LOCAL: |
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[3a4ae6c] | 345 | the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status; |
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[ac7d5ef0] | 346 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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| 347 | _Thread_Unnest_dispatch(); |
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| 348 | break; |
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| 349 | } |
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| 350 | } |
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| 351 | |
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| 352 | /*PAGE |
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| 353 | * |
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| 354 | * _Thread_queue_Enqueue_fifo |
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| 355 | * |
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| 356 | * This routine blocks a thread, places it on a thread, and optionally |
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| 357 | * starts a timeout timer. |
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| 358 | * |
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| 359 | * Input parameters: |
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| 360 | * the_thread_queue - pointer to threadq |
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| 361 | * the_thread - pointer to the thread to block |
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| 362 | * timeout - interval to wait |
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| 363 | * |
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| 364 | * Output parameters: NONE |
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| 365 | * |
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| 366 | * INTERRUPT LATENCY: |
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| 367 | * only case |
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| 368 | */ |
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| 369 | |
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| 370 | void _Thread_queue_Enqueue_fifo ( |
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| 371 | Thread_queue_Control *the_thread_queue, |
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| 372 | Thread_Control *the_thread, |
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[3a4ae6c] | 373 | Watchdog_Interval timeout |
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[ac7d5ef0] | 374 | ) |
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| 375 | { |
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| 376 | ISR_Level level; |
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| 377 | |
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| 378 | _ISR_Disable( level ); |
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| 379 | if ( the_thread_queue->sync == TRUE ) { |
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| 380 | the_thread_queue->sync = FALSE; |
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| 381 | |
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| 382 | _Chain_Append_unprotected( |
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| 383 | &the_thread_queue->Queues.Fifo, |
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| 384 | &the_thread->Object.Node |
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| 385 | ); |
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| 386 | |
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[3a4ae6c] | 387 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
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[ac7d5ef0] | 388 | _Watchdog_Activate( &the_thread->Timer ); |
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| 389 | |
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| 390 | _ISR_Enable( level ); |
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| 391 | return; |
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| 392 | } |
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| 393 | |
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| 394 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 395 | _ISR_Enable( level ); |
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| 396 | _Thread_Unblock( the_thread ); |
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| 397 | } else { |
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| 398 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 399 | _ISR_Enable( level ); |
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| 400 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 401 | _Thread_Unblock( the_thread ); |
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| 402 | } |
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| 403 | |
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| 404 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
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| 405 | _Thread_MP_Free_proxy( the_thread ); |
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| 406 | |
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| 407 | } |
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| 408 | |
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| 409 | /*PAGE |
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| 410 | * |
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| 411 | * _Thread_queue_Dequeue_fifo |
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| 412 | * |
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| 413 | * This routine removes a thread from the specified threadq. |
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| 414 | * |
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| 415 | * Input parameters: |
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| 416 | * the_thread_queue - pointer to threadq |
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| 417 | * |
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| 418 | * Output parameters: |
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| 419 | * returns - thread dequeued or NULL |
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| 420 | * |
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| 421 | * INTERRUPT LATENCY: |
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| 422 | * check sync |
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[3a4ae6c] | 423 | * FIFO |
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[ac7d5ef0] | 424 | */ |
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| 425 | |
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| 426 | Thread_Control *_Thread_queue_Dequeue_fifo( |
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| 427 | Thread_queue_Control *the_thread_queue |
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| 428 | ) |
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| 429 | { |
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| 430 | ISR_Level level; |
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| 431 | Thread_Control *the_thread; |
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| 432 | |
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| 433 | _ISR_Disable( level ); |
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| 434 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) ) { |
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| 435 | |
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| 436 | the_thread = (Thread_Control *) |
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| 437 | _Chain_Get_first_unprotected( &the_thread_queue->Queues.Fifo ); |
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| 438 | |
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| 439 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 440 | _ISR_Enable( level ); |
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| 441 | _Thread_Unblock( the_thread ); |
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| 442 | } else { |
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| 443 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 444 | _ISR_Enable( level ); |
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| 445 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 446 | _Thread_Unblock( the_thread ); |
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| 447 | } |
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| 448 | |
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| 449 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
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| 450 | _Thread_MP_Free_proxy( the_thread ); |
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| 451 | |
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| 452 | return( the_thread ); |
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| 453 | } |
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| 454 | _ISR_Enable( level ); |
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| 455 | return( NULL ); |
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| 456 | } |
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| 457 | |
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| 458 | /*PAGE |
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| 459 | * |
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| 460 | * _Thread_queue_Extract_fifo |
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| 461 | * |
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| 462 | * This routine removes a specific thread from the specified threadq, |
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| 463 | * deletes any timeout, and unblocks the thread. |
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| 464 | * |
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| 465 | * Input parameters: |
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| 466 | * the_thread_queue - pointer to a threadq header |
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| 467 | * the_thread - pointer to the thread to block |
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| 468 | * |
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| 469 | * Output parameters: NONE |
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| 470 | * |
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| 471 | * INTERRUPT LATENCY: |
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| 472 | * EXTRACT_FIFO |
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| 473 | */ |
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| 474 | |
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| 475 | void _Thread_queue_Extract_fifo( |
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| 476 | Thread_queue_Control *the_thread_queue, |
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| 477 | Thread_Control *the_thread |
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| 478 | ) |
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| 479 | { |
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| 480 | ISR_Level level; |
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| 481 | |
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| 482 | _ISR_Disable( level ); |
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| 483 | |
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| 484 | if ( !_States_Is_waiting_on_thread_queue( the_thread->current_state ) ) { |
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| 485 | _ISR_Enable( level ); |
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| 486 | return; |
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| 487 | } |
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| 488 | |
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| 489 | _Chain_Extract_unprotected( &the_thread->Object.Node ); |
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| 490 | |
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| 491 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
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| 492 | _ISR_Enable( level ); |
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| 493 | } else { |
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| 494 | _Watchdog_Deactivate( &the_thread->Timer ); |
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| 495 | _ISR_Enable( level ); |
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| 496 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 497 | } |
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| 498 | |
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[7f6a24ab] | 499 | _Thread_Unblock( the_thread ); |
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| 500 | |
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[ac7d5ef0] | 501 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 502 | _Thread_MP_Free_proxy( the_thread ); |
---|
[7f6a24ab] | 503 | |
---|
[ac7d5ef0] | 504 | } |
---|
| 505 | |
---|
| 506 | /*PAGE |
---|
| 507 | * |
---|
| 508 | * _Thread_queue_First_fifo |
---|
| 509 | * |
---|
| 510 | * This routines returns a pointer to the first thread on the |
---|
| 511 | * specified threadq. |
---|
| 512 | * |
---|
| 513 | * Input parameters: |
---|
| 514 | * the_thread_queue - pointer to threadq |
---|
| 515 | * |
---|
| 516 | * Output parameters: |
---|
| 517 | * returns - first thread or NULL |
---|
| 518 | */ |
---|
| 519 | |
---|
| 520 | Thread_Control *_Thread_queue_First_fifo( |
---|
| 521 | Thread_queue_Control *the_thread_queue |
---|
| 522 | ) |
---|
| 523 | { |
---|
| 524 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) ) |
---|
| 525 | return (Thread_Control *) the_thread_queue->Queues.Fifo.first; |
---|
| 526 | |
---|
| 527 | return NULL; |
---|
| 528 | } |
---|
| 529 | |
---|
| 530 | /*PAGE |
---|
| 531 | * |
---|
| 532 | * _Thread_queue_Enqueue_priority |
---|
| 533 | * |
---|
| 534 | * This routine blocks a thread, places it on a thread, and optionally |
---|
| 535 | * starts a timeout timer. |
---|
| 536 | * |
---|
| 537 | * Input parameters: |
---|
| 538 | * the_thread_queue - pointer to threadq |
---|
| 539 | * thread - thread to insert |
---|
| 540 | * timeout - timeout interval in ticks |
---|
| 541 | * |
---|
| 542 | * Output parameters: NONE |
---|
| 543 | * |
---|
| 544 | * INTERRUPT LATENCY: |
---|
| 545 | * forward less than |
---|
| 546 | * forward equal |
---|
| 547 | */ |
---|
| 548 | |
---|
| 549 | void _Thread_queue_Enqueue_priority( |
---|
| 550 | Thread_queue_Control *the_thread_queue, |
---|
| 551 | Thread_Control *the_thread, |
---|
[3a4ae6c] | 552 | Watchdog_Interval timeout |
---|
[ac7d5ef0] | 553 | ) |
---|
| 554 | { |
---|
[7f6a24ab] | 555 | Priority_Control search_priority; |
---|
| 556 | Thread_Control *search_thread; |
---|
| 557 | ISR_Level level; |
---|
| 558 | Chain_Control *header; |
---|
| 559 | unsigned32 header_index; |
---|
| 560 | Chain_Node *the_node; |
---|
| 561 | Chain_Node *next_node; |
---|
| 562 | Chain_Node *previous_node; |
---|
| 563 | Chain_Node *search_node; |
---|
| 564 | Priority_Control priority; |
---|
| 565 | States_Control block_state; |
---|
[ac7d5ef0] | 566 | |
---|
| 567 | _Chain_Initialize_empty( &the_thread->Wait.Block2n ); |
---|
| 568 | |
---|
| 569 | priority = the_thread->current_priority; |
---|
| 570 | header_index = _Thread_queue_Header_number( priority ); |
---|
| 571 | header = &the_thread_queue->Queues.Priority[ header_index ]; |
---|
| 572 | block_state = the_thread_queue->state; |
---|
| 573 | |
---|
| 574 | if ( _Thread_queue_Is_reverse_search( priority ) ) |
---|
| 575 | goto restart_reverse_search; |
---|
| 576 | |
---|
| 577 | restart_forward_search: |
---|
[3a4ae6c] | 578 | search_priority = PRIORITY_MINIMUM - 1; |
---|
[ac7d5ef0] | 579 | _ISR_Disable( level ); |
---|
| 580 | search_thread = (Thread_Control *) header->first; |
---|
| 581 | while ( !_Chain_Is_tail( header, (Chain_Node *)search_thread ) ) { |
---|
| 582 | search_priority = search_thread->current_priority; |
---|
| 583 | if ( priority <= search_priority ) |
---|
| 584 | break; |
---|
| 585 | |
---|
| 586 | #if ( CPU_UNROLL_ENQUEUE_PRIORITY == TRUE ) |
---|
| 587 | search_thread = (Thread_Control *) search_thread->Object.Node.next; |
---|
| 588 | if ( _Chain_Is_tail( header, (Chain_Node *)search_thread ) ) |
---|
| 589 | break; |
---|
| 590 | search_priority = search_thread->current_priority; |
---|
| 591 | if ( priority <= search_priority ) |
---|
| 592 | break; |
---|
| 593 | #endif |
---|
| 594 | _ISR_Flash( level ); |
---|
| 595 | if ( !_States_Are_set( search_thread->current_state, block_state) ) { |
---|
| 596 | _ISR_Enable( level ); |
---|
| 597 | goto restart_forward_search; |
---|
| 598 | } |
---|
| 599 | search_thread = |
---|
| 600 | (Thread_Control *)search_thread->Object.Node.next; |
---|
| 601 | } |
---|
| 602 | if ( the_thread_queue->sync == FALSE ) |
---|
| 603 | goto syncronize; |
---|
| 604 | |
---|
| 605 | the_thread_queue->sync = FALSE; |
---|
[3a4ae6c] | 606 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
---|
[ac7d5ef0] | 607 | _Watchdog_Activate( &the_thread->Timer ); |
---|
| 608 | |
---|
| 609 | if ( priority == search_priority ) |
---|
| 610 | goto equal_priority; |
---|
| 611 | |
---|
| 612 | search_node = (Chain_Node *) search_thread; |
---|
| 613 | previous_node = search_node->previous; |
---|
| 614 | the_node = (Chain_Node *) the_thread; |
---|
| 615 | |
---|
| 616 | the_node->next = search_node; |
---|
| 617 | the_node->previous = previous_node; |
---|
| 618 | previous_node->next = the_node; |
---|
| 619 | search_node->previous = the_node; |
---|
| 620 | _ISR_Enable( level ); |
---|
| 621 | return; |
---|
| 622 | |
---|
| 623 | restart_reverse_search: |
---|
[3a4ae6c] | 624 | search_priority = PRIORITY_MAXIMUM + 1; |
---|
[ac7d5ef0] | 625 | |
---|
| 626 | _ISR_Disable( level ); |
---|
| 627 | search_thread = (Thread_Control *) header->last; |
---|
| 628 | while ( !_Chain_Is_head( header, (Chain_Node *)search_thread ) ) { |
---|
| 629 | search_priority = search_thread->current_priority; |
---|
| 630 | if ( priority >= search_priority ) |
---|
| 631 | break; |
---|
| 632 | #if ( CPU_UNROLL_ENQUEUE_PRIORITY == TRUE ) |
---|
| 633 | search_thread = (Thread_Control *) search_thread->Object.Node.previous; |
---|
| 634 | if ( _Chain_Is_head( header, (Chain_Node *)search_thread ) ) |
---|
| 635 | break; |
---|
| 636 | search_priority = search_thread->current_priority; |
---|
| 637 | if ( priority >= search_priority ) |
---|
| 638 | break; |
---|
| 639 | #endif |
---|
| 640 | _ISR_Flash( level ); |
---|
| 641 | if ( !_States_Are_set( search_thread->current_state, block_state) ) { |
---|
| 642 | _ISR_Enable( level ); |
---|
| 643 | goto restart_reverse_search; |
---|
| 644 | } |
---|
| 645 | search_thread = (Thread_Control *) |
---|
| 646 | search_thread->Object.Node.previous; |
---|
| 647 | } |
---|
| 648 | if ( !the_thread_queue->sync ) |
---|
| 649 | goto syncronize; |
---|
| 650 | |
---|
| 651 | the_thread_queue->sync = FALSE; |
---|
[3a4ae6c] | 652 | if ( timeout != WATCHDOG_NO_TIMEOUT ) |
---|
[ac7d5ef0] | 653 | _Watchdog_Activate( &the_thread->Timer ); |
---|
| 654 | |
---|
| 655 | if ( priority == search_priority ) |
---|
| 656 | goto equal_priority; |
---|
| 657 | |
---|
| 658 | search_node = (Chain_Node *) search_thread; |
---|
| 659 | next_node = search_node->next; |
---|
| 660 | the_node = (Chain_Node *) the_thread; |
---|
| 661 | |
---|
| 662 | the_node->next = next_node; |
---|
| 663 | the_node->previous = search_node; |
---|
| 664 | search_node->next = the_node; |
---|
| 665 | next_node->previous = the_node; |
---|
| 666 | _ISR_Enable( level ); |
---|
| 667 | return; |
---|
| 668 | |
---|
| 669 | equal_priority: /* add at end of priority group */ |
---|
| 670 | search_node = _Chain_Tail( &search_thread->Wait.Block2n ); |
---|
| 671 | previous_node = search_node->previous; |
---|
| 672 | the_node = (Chain_Node *) the_thread; |
---|
| 673 | |
---|
| 674 | the_node->next = search_node; |
---|
| 675 | the_node->previous = previous_node; |
---|
| 676 | previous_node->next = the_node; |
---|
| 677 | search_node->previous = the_node; |
---|
| 678 | _ISR_Enable( level ); |
---|
| 679 | return; |
---|
| 680 | |
---|
| 681 | syncronize: |
---|
| 682 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 683 | _ISR_Enable( level ); |
---|
| 684 | _Thread_Unblock( the_thread ); |
---|
| 685 | } else { |
---|
| 686 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 687 | _ISR_Enable( level ); |
---|
| 688 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 689 | _Thread_Unblock( the_thread ); |
---|
| 690 | } |
---|
| 691 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 692 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 693 | } |
---|
| 694 | |
---|
| 695 | /*PAGE |
---|
| 696 | * |
---|
| 697 | * _Thread_queue_Dequeue_priority |
---|
| 698 | * |
---|
[3a4ae6c] | 699 | * This routine removes a thread from the specified PRIORITY based |
---|
[ac7d5ef0] | 700 | * threadq, unblocks it, and cancels its timeout timer. |
---|
| 701 | * |
---|
| 702 | * Input parameters: |
---|
| 703 | * the_thread_queue - pointer to thread queue |
---|
| 704 | * |
---|
| 705 | * Output parameters: |
---|
| 706 | * returns - thread dequeued or NULL |
---|
| 707 | * |
---|
| 708 | * INTERRUPT LATENCY: |
---|
| 709 | * only case |
---|
| 710 | */ |
---|
| 711 | |
---|
| 712 | Thread_Control *_Thread_queue_Dequeue_priority( |
---|
| 713 | Thread_queue_Control *the_thread_queue |
---|
| 714 | ) |
---|
| 715 | { |
---|
| 716 | unsigned32 index; |
---|
| 717 | ISR_Level level; |
---|
| 718 | Thread_Control *the_thread; |
---|
| 719 | Thread_Control *new_first_thread; |
---|
| 720 | Chain_Node *new_first_node; |
---|
| 721 | Chain_Node *new_second_node; |
---|
| 722 | Chain_Node *last_node; |
---|
| 723 | Chain_Node *next_node; |
---|
| 724 | Chain_Node *previous_node; |
---|
| 725 | |
---|
| 726 | for( index=0 ; |
---|
| 727 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
---|
| 728 | index++ ) { |
---|
| 729 | _ISR_Disable( level ); |
---|
| 730 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) ) { |
---|
| 731 | the_thread = (Thread_Control *) |
---|
| 732 | the_thread_queue->Queues.Priority[ index ].first; |
---|
| 733 | goto dequeue; |
---|
| 734 | } |
---|
| 735 | _ISR_Enable( level ); |
---|
| 736 | } |
---|
| 737 | return NULL; |
---|
| 738 | |
---|
| 739 | dequeue: |
---|
| 740 | new_first_node = the_thread->Wait.Block2n.first; |
---|
| 741 | new_first_thread = (Thread_Control *) new_first_node; |
---|
| 742 | next_node = the_thread->Object.Node.next; |
---|
| 743 | previous_node = the_thread->Object.Node.previous; |
---|
| 744 | |
---|
| 745 | if ( !_Chain_Is_empty( &the_thread->Wait.Block2n ) ) { |
---|
| 746 | last_node = the_thread->Wait.Block2n.last; |
---|
| 747 | new_second_node = new_first_node->next; |
---|
| 748 | |
---|
| 749 | previous_node->next = new_first_node; |
---|
| 750 | next_node->previous = new_first_node; |
---|
| 751 | new_first_node->next = next_node; |
---|
| 752 | new_first_node->previous = previous_node; |
---|
| 753 | |
---|
| 754 | if ( !_Chain_Has_only_one_node( &the_thread->Wait.Block2n ) ) { |
---|
| 755 | /* > two threads on 2-n */ |
---|
| 756 | new_second_node->previous = |
---|
| 757 | _Chain_Head( &new_first_thread->Wait.Block2n ); |
---|
| 758 | |
---|
| 759 | new_first_thread->Wait.Block2n.first = new_second_node; |
---|
| 760 | new_first_thread->Wait.Block2n.last = last_node; |
---|
| 761 | |
---|
| 762 | last_node->next = _Chain_Tail( &new_first_thread->Wait.Block2n ); |
---|
| 763 | } |
---|
| 764 | } else { |
---|
| 765 | previous_node->next = next_node; |
---|
| 766 | next_node->previous = previous_node; |
---|
| 767 | } |
---|
| 768 | |
---|
| 769 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 770 | _ISR_Enable( level ); |
---|
| 771 | _Thread_Unblock( the_thread ); |
---|
| 772 | } else { |
---|
| 773 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 774 | _ISR_Enable( level ); |
---|
| 775 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 776 | _Thread_Unblock( the_thread ); |
---|
| 777 | } |
---|
| 778 | |
---|
| 779 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 780 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 781 | return( the_thread ); |
---|
| 782 | } |
---|
| 783 | |
---|
| 784 | /*PAGE |
---|
| 785 | * |
---|
| 786 | * _Thread_queue_Extract_priority |
---|
| 787 | * |
---|
| 788 | * This routine removes a specific thread from the specified threadq, |
---|
| 789 | * deletes any timeout, and unblocks the thread. |
---|
| 790 | * |
---|
| 791 | * Input parameters: |
---|
| 792 | * the_thread_queue - pointer to a threadq header |
---|
| 793 | * the_thread - pointer to a thread control block |
---|
| 794 | * |
---|
| 795 | * Output parameters: NONE |
---|
| 796 | * |
---|
| 797 | * INTERRUPT LATENCY: |
---|
| 798 | * EXTRACT_PRIORITY |
---|
| 799 | */ |
---|
| 800 | |
---|
| 801 | void _Thread_queue_Extract_priority( |
---|
| 802 | Thread_queue_Control *the_thread_queue, |
---|
| 803 | Thread_Control *the_thread |
---|
| 804 | ) |
---|
| 805 | { |
---|
| 806 | ISR_Level level; |
---|
| 807 | Chain_Node *the_node; |
---|
| 808 | Chain_Node *next_node; |
---|
| 809 | Chain_Node *previous_node; |
---|
| 810 | Thread_Control *new_first_thread; |
---|
| 811 | Chain_Node *new_first_node; |
---|
| 812 | Chain_Node *new_second_node; |
---|
| 813 | Chain_Node *last_node; |
---|
| 814 | |
---|
| 815 | the_node = (Chain_Node *) the_thread; |
---|
| 816 | _ISR_Disable( level ); |
---|
| 817 | if ( _States_Is_waiting_on_thread_queue( the_thread->current_state ) ) { |
---|
| 818 | next_node = the_node->next; |
---|
| 819 | previous_node = the_node->previous; |
---|
| 820 | |
---|
| 821 | if ( !_Chain_Is_empty( &the_thread->Wait.Block2n ) ) { |
---|
| 822 | new_first_node = the_thread->Wait.Block2n.first; |
---|
| 823 | new_first_thread = (Thread_Control *) new_first_node; |
---|
| 824 | last_node = the_thread->Wait.Block2n.last; |
---|
| 825 | new_second_node = new_first_node->next; |
---|
| 826 | |
---|
| 827 | previous_node->next = new_first_node; |
---|
| 828 | next_node->previous = new_first_node; |
---|
| 829 | new_first_node->next = next_node; |
---|
| 830 | new_first_node->previous = previous_node; |
---|
| 831 | |
---|
| 832 | if ( !_Chain_Has_only_one_node( &the_thread->Wait.Block2n ) ) { |
---|
| 833 | /* > two threads on 2-n */ |
---|
| 834 | new_second_node->previous = |
---|
| 835 | _Chain_Head( &new_first_thread->Wait.Block2n ); |
---|
| 836 | new_first_thread->Wait.Block2n.first = new_second_node; |
---|
| 837 | |
---|
| 838 | new_first_thread->Wait.Block2n.last = last_node; |
---|
| 839 | last_node->next = _Chain_Tail( &new_first_thread->Wait.Block2n ); |
---|
| 840 | } |
---|
| 841 | } else { |
---|
| 842 | previous_node->next = next_node; |
---|
| 843 | next_node->previous = previous_node; |
---|
| 844 | } |
---|
| 845 | |
---|
| 846 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
| 847 | _ISR_Enable( level ); |
---|
| 848 | _Thread_Unblock( the_thread ); |
---|
| 849 | } else { |
---|
| 850 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
| 851 | _ISR_Enable( level ); |
---|
| 852 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
| 853 | _Thread_Unblock( the_thread ); |
---|
| 854 | } |
---|
| 855 | |
---|
| 856 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) |
---|
| 857 | _Thread_MP_Free_proxy( the_thread ); |
---|
| 858 | } |
---|
| 859 | else |
---|
| 860 | _ISR_Enable( level ); |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | /*PAGE |
---|
| 864 | * |
---|
| 865 | * _Thread_queue_First_priority |
---|
| 866 | * |
---|
| 867 | * This routines returns a pointer to the first thread on the |
---|
| 868 | * specified threadq. |
---|
| 869 | * |
---|
| 870 | * Input parameters: |
---|
| 871 | * the_thread_queue - pointer to thread queue |
---|
| 872 | * |
---|
| 873 | * Output parameters: |
---|
| 874 | * returns - first thread or NULL |
---|
| 875 | */ |
---|
| 876 | |
---|
| 877 | Thread_Control *_Thread_queue_First_priority ( |
---|
| 878 | Thread_queue_Control *the_thread_queue |
---|
| 879 | ) |
---|
| 880 | { |
---|
| 881 | unsigned32 index; |
---|
| 882 | |
---|
| 883 | for( index=0 ; |
---|
| 884 | index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ; |
---|
| 885 | index++ ) { |
---|
| 886 | if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) ) |
---|
| 887 | return (Thread_Control *) |
---|
| 888 | the_thread_queue->Queues.Priority[ index ].first; |
---|
| 889 | } |
---|
| 890 | return NULL; |
---|
| 891 | } |
---|