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) 1989-1998. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * Copyright assigned to U.S. Government, 1994. |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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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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17 | #include <rtems/score/address.h> |
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18 | #include <rtems/score/chain.h> |
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19 | #include <rtems/score/object.h> |
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20 | #if defined(RTEMS_MULTIPROCESSING) |
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21 | #include <rtems/score/objectmp.h> |
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22 | #endif |
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23 | #include <rtems/score/thread.h> |
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24 | #include <rtems/score/wkspace.h> |
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25 | #include <rtems/score/sysstate.h> |
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26 | #include <rtems/score/isr.h> |
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27 | |
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28 | /*PAGE |
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29 | * |
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30 | * _Objects_Allocate_by_index |
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31 | * |
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32 | * DESCRIPTION: |
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33 | * |
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34 | * This function allocates the object control block |
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35 | * specified by the index from the inactive chain of |
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36 | * free object control blocks. |
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37 | */ |
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38 | |
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39 | Objects_Control *_Objects_Allocate_by_index( |
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40 | Objects_Information *information, |
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41 | unsigned32 index, |
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42 | unsigned32 sizeof_control |
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43 | ) |
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44 | { |
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45 | Objects_Control *the_object; |
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46 | void *p; |
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47 | |
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48 | if ( index && information->maximum >= index ) { |
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49 | the_object = _Objects_Get_local_object( information, index ); |
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50 | if ( the_object ) |
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51 | return NULL; |
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52 | |
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53 | /* XXX |
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54 | * This whole section of code needs to be addressed. |
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55 | * + The 0 should be dealt with more properly so we can autoextend. |
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56 | * + The pointer arithmetic is probably too expensive. |
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57 | * + etc. |
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58 | */ |
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59 | |
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60 | p = _Addresses_Add_offset( information->object_blocks[ 0 ], |
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61 | (information->allocation_size * information->name_length) ), |
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62 | |
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63 | p = _Addresses_Add_offset( p, (sizeof_control * (index - 1)) ); |
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64 | the_object = (Objects_Control *)p; |
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65 | _Chain_Extract( &the_object->Node ); |
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66 | |
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67 | return the_object; |
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68 | } |
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69 | |
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70 | /* |
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71 | * Autoextend will have to be thought out as it applies |
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72 | * to user assigned indices. |
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73 | */ |
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74 | |
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75 | return NULL; |
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76 | } |
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