4.104.114.84.95
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1 | /* Shm_Get_packet |
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2 | * |
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3 | * This routine is the shared memory locked queue MPCI driver |
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4 | * routine used to obtain an empty message packet. |
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5 | * |
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6 | * Input parameters: |
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7 | * packet - address of pointer to packet |
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8 | * |
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9 | * Output parameters: |
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10 | * *(cpb->get_packet) - address of allocated packet |
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11 | * |
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12 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * All rights assigned to U.S. Government, 1994. |
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15 | * |
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16 | * This material may be reproduced by or for the U.S. Government pursuant |
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17 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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18 | * notice must appear in all copies of this file and its derivatives. |
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19 | * |
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20 | * $Id$ |
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21 | */ |
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22 | |
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23 | #include <rtems.h> |
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24 | #include "shm.h" |
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25 | |
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26 | rtems_mpci_entry Shm_Get_packet( |
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27 | rtems_packet_prefix **packet |
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28 | ) |
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29 | { |
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30 | Shm_Envelope_control *ecb; |
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31 | |
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32 | ecb = Shm_Allocate_envelope(); |
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33 | if ( !ecb ) |
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34 | rtems_fatal_error_occurred ( SHM_NO_FREE_PKTS ); |
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35 | *packet = Shm_Envelope_control_to_packet_prefix_pointer( ecb ); |
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36 | } |
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