forked from Imagelibrary/rtems
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/**
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* @file
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*
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* @brief Get Object Information
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* @ingroup ScoreObject
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*/
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/*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/score/objectimpl.h>
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Objects_Information *_Objects_Get_information(
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Objects_APIs the_api,
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uint16_t the_class
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)
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{
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Objects_Information *info;
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int the_class_api_maximum;
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if ( !the_class )
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return NULL;
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/*
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* This call implicitly validates the_api so we do not call
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* _Objects_Is_api_valid above here.
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*/
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the_class_api_maximum = _Objects_API_maximum_class( the_api );
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if ( the_class_api_maximum == 0 )
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return NULL;
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if ( the_class > (uint32_t) the_class_api_maximum )
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return NULL;
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if ( !_Objects_Information_table[ the_api ] )
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return NULL;
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info = _Objects_Information_table[ the_api ][ the_class ];
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if ( !info )
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return NULL;
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/*
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* In a multprocessing configuration, we may access remote objects.
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* Thus we may have 0 local instances and still have a valid object
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* pointer.
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*/
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#if !defined(RTEMS_MULTIPROCESSING)
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if ( info->maximum == 0 )
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return NULL;
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#endif
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return info;
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}
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