1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup RTEMSScoreUserExt |
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7 | * |
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8 | * @brief This source file contains the implementation of |
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9 | * _User_extensions_Add_set(). |
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10 | */ |
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11 | |
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12 | /* |
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13 | * COPYRIGHT (c) 1989-2007. |
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14 | * On-Line Applications Research Corporation (OAR). |
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15 | * |
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16 | * Redistribution and use in source and binary forms, with or without |
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17 | * modification, are permitted provided that the following conditions |
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18 | * are met: |
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19 | * 1. Redistributions of source code must retain the above copyright |
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20 | * notice, this list of conditions and the following disclaimer. |
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21 | * 2. Redistributions in binary form must reproduce the above copyright |
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22 | * notice, this list of conditions and the following disclaimer in the |
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23 | * documentation and/or other materials provided with the distribution. |
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24 | * |
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25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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35 | * POSSIBILITY OF SUCH DAMAGE. |
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36 | */ |
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37 | |
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38 | #ifdef HAVE_CONFIG_H |
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39 | #include "config.h" |
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40 | #endif |
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41 | |
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42 | #include <rtems/score/userextimpl.h> |
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43 | #include <rtems/score/smp.h> |
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44 | #include <rtems/score/percpu.h> |
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45 | |
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46 | static void _User_extensions_Set_ancestors( void ) |
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47 | { |
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48 | #if defined(RTEMS_SMP) |
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49 | if ( _Chain_Is_empty( &_User_extensions_Switches_list ) ) { |
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50 | uint32_t cpu_max; |
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51 | uint32_t cpu_index; |
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52 | |
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53 | cpu_max = _SMP_Get_processor_maximum(); |
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54 | |
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55 | for ( cpu_index = 0 ; cpu_index < cpu_max ; ++cpu_index ) { |
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56 | Per_CPU_Control *cpu; |
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57 | |
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58 | cpu = _Per_CPU_Get_by_index( cpu_index ); |
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59 | cpu->ancestor = cpu->executing; |
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60 | } |
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61 | } |
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62 | #endif |
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63 | } |
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64 | |
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65 | void _User_extensions_Add_set( |
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66 | User_extensions_Control *the_extension |
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67 | ) |
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68 | { |
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69 | ISR_lock_Context lock_context; |
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70 | |
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71 | _User_extensions_Acquire( &lock_context ); |
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72 | _Chain_Initialize_node( &the_extension->Node ); |
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73 | _Chain_Append_unprotected( |
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74 | &_User_extensions_List.Active, |
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75 | &the_extension->Node |
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76 | ); |
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77 | _User_extensions_Release( &lock_context ); |
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78 | |
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79 | /* |
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80 | * If a switch handler is present, append it to the switch chain. |
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81 | */ |
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82 | |
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83 | if ( the_extension->Callouts.thread_switch != NULL ) { |
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84 | the_extension->Switch.thread_switch = |
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85 | the_extension->Callouts.thread_switch; |
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86 | |
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87 | _Per_CPU_Acquire_all( &lock_context ); |
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88 | _User_extensions_Set_ancestors(); |
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89 | _Chain_Initialize_node( &the_extension->Switch.Node ); |
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90 | _Chain_Append_unprotected( |
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91 | &_User_extensions_Switches_list, |
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92 | &the_extension->Switch.Node |
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93 | ); |
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94 | _Per_CPU_Release_all( &lock_context ); |
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95 | } |
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96 | } |
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