rtems/src/regionextend.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicRegion
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_region_extend().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2009.
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/regionimpl.h>
0043
0044 rtems_status_code rtems_region_extend(
0045   rtems_id   id,
0046   void      *starting_address,
0047   uintptr_t  length
0048 )
0049 {
0050   rtems_status_code  status;
0051   Region_Control    *the_region;
0052   uintptr_t          amount_extended;
0053
0054   if ( starting_address == NULL ) {
0055     return RTEMS_INVALID_ADDRESS;
0056   }
0057
0058   the_region = _Region_Get_and_lock( id );
0059
0060   if ( the_region == NULL ) {
0061     return RTEMS_INVALID_ID;
0062   }
0063
0064   amount_extended = _Heap_Extend(
0065     &the_region->Memory,
0066     starting_address,
0067     length,
0068     0
0069   );
0070
0071   if ( amount_extended > 0 ) {
0072     the_region->maximum_segment_size += amount_extended;
0073     status = RTEMS_SUCCESSFUL;
0074   } else {
0075     status = RTEMS_INVALID_ADDRESS;
0076   }
0077
0078   _Region_Unlock( the_region );
0079   return status;
0080 }