5
Last change
on this file since 1c2d178 was
3899bc1a,
checked in by Sebastian Huber <sebastian.huber@…>, on 11/24/18 at 10:51:28
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score: Optimize object lookup
Use the maximum ID for the ID to object translation. Using the maximum
ID gets rid of an additional load from the object information in
_Objects_Get(). In addition, object lookups fail for every ID in case
the object information is cleared to zero. This makes it a bit more
robust during system startup (see new tests in spconfig02).
The local table no longer needs a NULL pointer entry at array index
zero. Adjust all the object iteration loops accordingly.
Remove Objects_Information::minimum_id since it contains only redundant
information. Add _Objects_Get_minimum_id() to get the minimum ID.
Update #3621.
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-
Property mode set to
100644
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File size:
995 bytes
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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Get Object without Dispatching Protection |
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5 | * @ingroup ScoreObject |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2002. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/objectimpl.h> |
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22 | |
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23 | Objects_Control *_Objects_Get_no_protection( |
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24 | Objects_Id id, |
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25 | const Objects_Information *information |
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26 | ) |
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27 | { |
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28 | Objects_Id delta; |
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29 | Objects_Id maximum_id; |
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30 | Objects_Id end; |
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31 | |
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32 | maximum_id = information->maximum_id; |
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33 | delta = maximum_id - id; |
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34 | end = _Objects_Get_index( maximum_id ); |
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35 | |
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36 | if ( RTEMS_PREDICT_TRUE( delta < end ) ) { |
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37 | return information->local_table[ end - OBJECTS_INDEX_MINIMUM - delta ]; |
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38 | } |
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39 | |
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40 | /* |
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41 | * This isn't supported or required yet for Global objects so |
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42 | * if it isn't local, we don't find it. |
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43 | */ |
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44 | return NULL; |
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45 | } |
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