[f2f63d1] | 1 | /** |
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| 2 | * @file |
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[317a5b5] | 3 | * |
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[f2f63d1] | 4 | * @brief Allocate Object |
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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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[08311cc3] | 9 | * COPYRIGHT (c) 1989-1999. |
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[317a5b5] | 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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[c499856] | 14 | * http://www.rtems.org/license/LICENSE. |
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[317a5b5] | 15 | */ |
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| 16 | |
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[a8eed23] | 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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[a2e3f33] | 21 | #include <rtems/score/objectimpl.h> |
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[23fec9f0] | 22 | #include <rtems/score/assert.h> |
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[6e93dc4a] | 23 | #include <rtems/score/chainimpl.h> |
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[23fec9f0] | 24 | #include <rtems/score/sysstate.h> |
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[317a5b5] | 25 | |
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[23fec9f0] | 26 | static Objects_Control *_Objects_Get_inactive( |
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| 27 | Objects_Information *information |
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| 28 | ) |
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| 29 | { |
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| 30 | return (Objects_Control *) _Chain_Get_unprotected( &information->Inactive ); |
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| 31 | } |
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| 32 | |
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| 33 | Objects_Control *_Objects_Allocate_unprotected( |
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[317a5b5] | 34 | Objects_Information *information |
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| 35 | ) |
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| 36 | { |
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[404903b] | 37 | Objects_Control *the_object; |
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| 38 | |
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[23fec9f0] | 39 | _Assert( |
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[6c2b8a4b] | 40 | _Objects_Allocator_is_owner() |
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[23fec9f0] | 41 | || !_System_state_Is_up( _System_state_Get() ) |
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| 42 | ); |
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| 43 | |
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[404903b] | 44 | /* |
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| 45 | * If the application is using the optional manager stubs and |
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| 46 | * still attempts to create the object, the information block |
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| 47 | * should be all zeroed out because it is in the BSS. So let's |
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| 48 | * check that code for this manager is even present. |
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| 49 | */ |
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[0da9d80] | 50 | if ( information->object_size == 0 ) |
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[404903b] | 51 | return NULL; |
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| 52 | |
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| 53 | /* |
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| 54 | * OK. The manager should be initialized and configured to have objects. |
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| 55 | * With any luck, it is safe to attempt to allocate an object. |
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| 56 | */ |
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[23fec9f0] | 57 | the_object = _Objects_Get_inactive( information ); |
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[317a5b5] | 58 | |
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[8b0e752f] | 59 | if ( _Objects_Is_auto_extend( information ) ) { |
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[317a5b5] | 60 | /* |
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| 61 | * If the list is empty then we are out of objects and need to |
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| 62 | * extend information base. |
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| 63 | */ |
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[05279b84] | 64 | |
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[3899bc1a] | 65 | if ( the_object == NULL ) { |
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[317a5b5] | 66 | _Objects_Extend_information( information ); |
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[23fec9f0] | 67 | the_object = _Objects_Get_inactive( information ); |
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[317a5b5] | 68 | } |
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[05279b84] | 69 | |
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[3899bc1a] | 70 | if ( the_object != NULL ) { |
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[21275b58] | 71 | Objects_Maximum objects_per_block; |
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[3899bc1a] | 72 | Objects_Maximum block; |
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[05279b84] | 73 | |
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[21275b58] | 74 | objects_per_block = information->objects_per_block; |
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[3899bc1a] | 75 | block = _Objects_Get_index( the_object->id ) - OBJECTS_INDEX_MINIMUM; |
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[05279b84] | 76 | |
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[21275b58] | 77 | if ( block > objects_per_block ) { |
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| 78 | block /= objects_per_block; |
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| 79 | |
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| 80 | information->inactive_per_block[ block ]--; |
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| 81 | information->inactive--; |
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| 82 | } |
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[317a5b5] | 83 | } |
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| 84 | } |
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[05279b84] | 85 | |
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[317a5b5] | 86 | return the_object; |
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| 87 | } |
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[23fec9f0] | 88 | |
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| 89 | Objects_Control *_Objects_Allocate( Objects_Information *information ) |
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| 90 | { |
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| 91 | _RTEMS_Lock_allocator(); |
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| 92 | |
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| 93 | return _Objects_Allocate_unprotected( information ); |
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| 94 | } |
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