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