1 | /* |
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2 | * Object Handler |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/address.h> |
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21 | #include <rtems/score/chain.h> |
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22 | #include <rtems/score/object.h> |
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23 | #if defined(RTEMS_MULTIPROCESSING) |
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24 | #include <rtems/score/objectmp.h> |
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25 | #endif |
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26 | #include <rtems/score/thread.h> |
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27 | #include <rtems/score/wkspace.h> |
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28 | #include <rtems/score/sysstate.h> |
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29 | #include <rtems/score/isr.h> |
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30 | |
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31 | /*PAGE |
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32 | * |
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33 | * _Objects_Get_by_index |
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34 | * |
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35 | * This routine sets the object pointer for the given |
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36 | * object id based on the given object information structure. |
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37 | * |
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38 | * Input parameters: |
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39 | * information - pointer to entry in table for this class |
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40 | * index - object index to check for |
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41 | * location - address of where to store the location |
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42 | * |
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43 | * Output parameters: |
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44 | * returns - address of object if local |
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45 | * location - one of the following: |
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46 | * OBJECTS_ERROR - invalid object ID |
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47 | * OBJECTS_REMOTE - remote object |
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48 | * OBJECTS_LOCAL - local object |
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49 | */ |
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50 | |
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51 | Objects_Control *_Objects_Get_by_index( |
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52 | Objects_Information *information, |
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53 | Objects_Id id, |
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54 | Objects_Locations *location |
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55 | ) |
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56 | { |
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57 | Objects_Control *the_object; |
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58 | uint16_t index; |
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59 | |
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60 | index = _Objects_Get_index( id ); |
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61 | |
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62 | if ( information->maximum >= index ) { |
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63 | _Thread_Disable_dispatch(); |
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64 | the_object = information->local_table[ index ]; |
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65 | if ( the_object ) { |
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66 | *location = OBJECTS_LOCAL; |
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67 | return( the_object ); |
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68 | } |
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69 | _Thread_Enable_dispatch(); |
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70 | *location = OBJECTS_ERROR; |
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71 | return( NULL ); |
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72 | } |
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73 | |
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74 | /* |
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75 | * With just an index, you can't access a remote object. |
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76 | */ |
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77 | |
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78 | *location = OBJECTS_ERROR; |
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79 | return NULL; |
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80 | } |
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