/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreObject
*
* @brief This source file contains the implementation of
* _Objects_Get().
*/
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/objectimpl.h>
Objects_Control *_Objects_Get(
Objects_Id id,
ISR_lock_Context *lock_context,
const Objects_Information *information
)
{
Objects_Id delta;
Objects_Id maximum_id;
Objects_Id end;
maximum_id = information->maximum_id;
delta = maximum_id - id;
end = _Objects_Get_index( maximum_id );
if ( RTEMS_PREDICT_TRUE( delta < end ) ) {
ISR_Level level;
Objects_Control *the_object;
_ISR_Local_disable( level );
_ISR_lock_Context_set_level( lock_context, level );
the_object =
information->local_table[ end - OBJECTS_INDEX_MINIMUM - delta ];
if ( RTEMS_PREDICT_TRUE( the_object != NULL ) ) {
/* ISR disabled on behalf of caller */
return the_object;
}
_ISR_Local_enable( level );
}
return NULL;
}