rtems/src/rtemsobjectgetclassinfo.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicObject
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_object_get_class_information().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2008.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/rtems/object.h>
0043 #include <rtems/score/objectimpl.h>
0044
0045 rtems_status_code rtems_object_get_class_information(
0046   int                                 the_api,
0047   int                                 the_class,
0048   rtems_object_api_class_information *info
0049 )
0050 {
0051   Objects_Information *obj_info;
0052   int                  unallocated;
0053   int                  i;
0054
0055   /*
0056    * Validate parameters and look up information structure.
0057    */
0058   if ( !info )
0059     return RTEMS_INVALID_ADDRESS;
0060
0061   obj_info = _Objects_Get_information( the_api, the_class );
0062   if ( !obj_info )
0063     return RTEMS_INVALID_NUMBER;
0064
0065   /*
0066    * Return information about this object class to the user.
0067    */
0068   info->minimum_id  = _Objects_Get_minimum_id( obj_info->maximum_id );
0069   info->maximum_id  = obj_info->maximum_id;
0070   info->auto_extend = _Objects_Is_auto_extend( obj_info );
0071   info->maximum     = _Objects_Get_maximum_index( obj_info );
0072
0073   for ( unallocated=0, i=1 ; i <= info->maximum ; i++ )
0074     if ( !obj_info->local_table[i] )
0075       unallocated++;
0076
0077   info->unallocated = unallocated;
0078
0079   return RTEMS_SUCCESSFUL;
0080 }
0081