4.104.114.84.95
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1 | /* void Shm_Poll() |
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2 | * |
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3 | * This routine polls to see if a packet has arrived. If one |
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4 | * has it informs the executive. It is typically called from |
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5 | * the clock tick interrupt service routine. |
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6 | * |
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7 | * Input parameters: NONE |
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8 | * |
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9 | * Output parameters: NONE |
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10 | * |
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11 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * All rights assigned to U.S. Government, 1994. |
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14 | * |
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15 | * This material may be reproduced by or for the U.S. Government pursuant |
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16 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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17 | * notice must appear in all copies of this file and its derivatives. |
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18 | * |
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19 | * $Id$ |
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20 | */ |
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21 | |
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22 | #include <rtems.h> |
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23 | #include "shm.h" |
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24 | #include "clockdrv.h" |
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25 | |
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26 | void Shm_Poll() |
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27 | { |
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28 | rtems_unsigned32 tmpfront; |
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29 | |
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30 | Clock_isr( 0 ); /* invoke standard clock ISR */ |
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31 | |
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32 | /* enable_tracing(); */ |
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33 | /* ticks += 1; */ |
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34 | Shm_Lock( Shm_Local_receive_queue ); |
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35 | tmpfront = Shm_Local_receive_queue->front; |
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36 | Shm_Unlock( Shm_Local_receive_queue ); |
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37 | if ( Shm_Convert(tmpfront) == Shm_Locked_queue_End_of_list ) return; |
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38 | rtems_multiprocessing_announce(); |
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39 | Shm_Interrupt_count++; |
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40 | } |
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