[317a5b5] | 1 | /* |
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| 2 | * Object Handler |
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| 3 | * |
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| 4 | * |
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[08311cc3] | 5 | * COPYRIGHT (c) 1989-1999. |
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[317a5b5] | 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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[dd687d97] | 10 | * http://www.rtems.com/license/LICENSE. |
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[317a5b5] | 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | |
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| 15 | #include <rtems/system.h> |
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| 16 | #include <rtems/score/address.h> |
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| 17 | #include <rtems/score/chain.h> |
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| 18 | #include <rtems/score/object.h> |
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| 19 | #if defined(RTEMS_MULTIPROCESSING) |
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| 20 | #include <rtems/score/objectmp.h> |
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| 21 | #endif |
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| 22 | #include <rtems/score/thread.h> |
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| 23 | #include <rtems/score/wkspace.h> |
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| 24 | #include <rtems/score/sysstate.h> |
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| 25 | #include <rtems/score/isr.h> |
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| 26 | |
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| 27 | /*PAGE |
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| 28 | * |
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| 29 | * _Objects_Allocate_by_index |
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| 30 | * |
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| 31 | * DESCRIPTION: |
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| 32 | * |
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[a0ed4ed] | 33 | * This function allocates the object control block |
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| 34 | * specified by the index from the inactive chain of |
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[317a5b5] | 35 | * free object control blocks. |
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| 36 | */ |
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| 37 | |
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| 38 | Objects_Control *_Objects_Allocate_by_index( |
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| 39 | Objects_Information *information, |
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[c7b7f38] | 40 | uint16_t index, |
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| 41 | uint16_t sizeof_control |
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[317a5b5] | 42 | ) |
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| 43 | { |
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| 44 | Objects_Control *the_object; |
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| 45 | |
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| 46 | if ( index && information->maximum >= index ) { |
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[3b4413c0] | 47 | the_object = information->local_table[ index ]; |
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[317a5b5] | 48 | if ( the_object ) |
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| 49 | return NULL; |
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| 50 | |
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| 51 | /* XXX |
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| 52 | * This whole section of code needs to be addressed. |
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[6af81435] | 53 | * + The 0 should be dealt with more properly so we can autoextend. |
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| 54 | * + The pointer arithmetic is probably too expensive. |
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[317a5b5] | 55 | * + etc. |
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| 56 | */ |
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[05279b84] | 57 | |
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[6af81435] | 58 | the_object = (Objects_Control *) _Addresses_Add_offset( |
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| 59 | information->object_blocks[ 0 ], |
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| 60 | (sizeof_control * (index - 1)) |
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| 61 | ); |
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[317a5b5] | 62 | _Chain_Extract( &the_object->Node ); |
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[05279b84] | 63 | |
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[a0ed4ed] | 64 | return the_object; |
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| 65 | } |
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[317a5b5] | 66 | |
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| 67 | /* |
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| 68 | * Autoextend will have to be thought out as it applies |
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| 69 | * to user assigned indices. |
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| 70 | */ |
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| 71 | |
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| 72 | return NULL; |
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| 73 | } |
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