score/src/userextaddset.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreUserExt
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _User_extensions_Add_set().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2007.
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/score/userextimpl.h>
0043 #include <rtems/score/smp.h>
0044 #include <rtems/score/percpu.h>
0045
0046 static void _User_extensions_Set_ancestors( void )
0047 {
0048 #if defined(RTEMS_SMP)
0049   if ( _Chain_Is_empty( &_User_extensions_Switches_list ) ) {
0050     uint32_t cpu_max;
0051     uint32_t cpu_index;
0052
0053     cpu_max = _SMP_Get_processor_maximum();
0054
0055     for ( cpu_index = 0 ; cpu_index < cpu_max ; ++cpu_index ) {
0056        Per_CPU_Control *cpu;
0057
0058        cpu = _Per_CPU_Get_by_index( cpu_index );
0059        cpu->ancestor = cpu->executing;
0060     }
0061   }
0062 #endif
0063 }
0064
0065 void _User_extensions_Add_set(
0066   User_extensions_Control *the_extension
0067 )
0068 {
0069   ISR_lock_Context lock_context;
0070
0071   _User_extensions_Acquire( &lock_context );
0072   _Chain_Initialize_node( &the_extension->Node );
0073   _Chain_Append_unprotected(
0074     &_User_extensions_List.Active,
0075     &the_extension->Node
0076   );
0077   _User_extensions_Release( &lock_context );
0078
0079   /*
0080    * If a switch handler is present, append it to the switch chain.
0081    */
0082
0083   if ( the_extension->Callouts.thread_switch != NULL ) {
0084     the_extension->Switch.thread_switch =
0085       the_extension->Callouts.thread_switch;
0086
0087     _Per_CPU_Acquire_all( &lock_context );
0088     _User_extensions_Set_ancestors();
0089     _Chain_Initialize_node( &the_extension->Switch.Node );
0090     _Chain_Append_unprotected(
0091       &_User_extensions_Switches_list,
0092       &the_extension->Switch.Node
0093     );
0094     _Per_CPU_Release_all( &lock_context );
0095   }
0096 }