1 | /* |
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2 | * Copyright (c) 2014 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/rtems/semimpl.h> |
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20 | #include <rtems/rtems/attrimpl.h> |
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21 | #include <rtems/rtems/tasksimpl.h> |
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22 | #include <rtems/score/schedulerimpl.h> |
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23 | |
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24 | static rtems_status_code _Semaphore_Set_priority( |
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25 | Semaphore_Control *the_semaphore, |
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26 | rtems_id scheduler_id, |
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27 | rtems_task_priority new_priority, |
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28 | rtems_task_priority *old_priority_p, |
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29 | ISR_lock_Context *lock_context |
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30 | ) |
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31 | { |
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32 | rtems_status_code sc; |
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33 | rtems_attribute attribute_set = the_semaphore->attribute_set; |
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34 | rtems_task_priority old_priority; |
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35 | |
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36 | new_priority = _RTEMS_tasks_Priority_to_Core( new_priority ); |
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37 | |
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38 | #if defined(RTEMS_SMP) |
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39 | if ( _Attributes_Is_multiprocessor_resource_sharing( attribute_set ) ) { |
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40 | MRSP_Control *mrsp = &the_semaphore->Core_control.mrsp; |
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41 | uint32_t scheduler_index = _Scheduler_Get_index_by_id( scheduler_id ); |
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42 | |
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43 | _MRSP_Acquire_critical( mrsp, lock_context ); |
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44 | |
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45 | old_priority = _MRSP_Get_ceiling_priority( mrsp, scheduler_index ); |
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46 | |
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47 | if ( new_priority != RTEMS_CURRENT_PRIORITY ) { |
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48 | _MRSP_Set_ceiling_priority( mrsp, scheduler_index, new_priority ); |
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49 | } |
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50 | |
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51 | _MRSP_Release( mrsp, lock_context ); |
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52 | |
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53 | sc = RTEMS_SUCCESSFUL; |
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54 | } else |
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55 | #endif |
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56 | if ( _Attributes_Is_priority_ceiling( attribute_set ) ) { |
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57 | CORE_mutex_Control *mutex = &the_semaphore->Core_control.mutex; |
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58 | |
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59 | _CORE_mutex_Acquire_critical( mutex, lock_context ); |
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60 | |
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61 | old_priority = mutex->Attributes.priority_ceiling; |
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62 | |
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63 | if ( new_priority != RTEMS_CURRENT_PRIORITY ) { |
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64 | mutex->Attributes.priority_ceiling = new_priority; |
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65 | } |
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66 | |
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67 | _CORE_mutex_Release( mutex, lock_context ); |
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68 | |
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69 | sc = RTEMS_SUCCESSFUL; |
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70 | } else { |
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71 | _ISR_lock_ISR_enable( lock_context ); |
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72 | |
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73 | old_priority = 0; |
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74 | |
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75 | sc = RTEMS_NOT_DEFINED; |
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76 | } |
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77 | |
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78 | *old_priority_p = _RTEMS_tasks_Priority_from_Core( old_priority ); |
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79 | |
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80 | return sc; |
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81 | } |
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82 | |
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83 | rtems_status_code rtems_semaphore_set_priority( |
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84 | rtems_id semaphore_id, |
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85 | rtems_id scheduler_id, |
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86 | rtems_task_priority new_priority, |
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87 | rtems_task_priority *old_priority |
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88 | ) |
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89 | { |
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90 | Semaphore_Control *the_semaphore; |
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91 | Objects_Locations location; |
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92 | ISR_lock_Context lock_context; |
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93 | |
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94 | if ( new_priority != RTEMS_CURRENT_PRIORITY && |
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95 | !_RTEMS_tasks_Priority_is_valid( new_priority ) ) { |
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96 | return RTEMS_INVALID_PRIORITY; |
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97 | } |
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98 | |
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99 | if ( old_priority == NULL ) { |
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100 | return RTEMS_INVALID_ADDRESS; |
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101 | } |
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102 | |
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103 | if ( !_Scheduler_Is_id_valid( scheduler_id ) ) { |
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104 | return RTEMS_INVALID_ID; |
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105 | } |
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106 | |
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107 | the_semaphore = _Semaphore_Get_interrupt_disable( |
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108 | semaphore_id, |
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109 | &location, |
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110 | &lock_context |
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111 | ); |
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112 | switch ( location ) { |
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113 | case OBJECTS_LOCAL: |
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114 | return _Semaphore_Set_priority( |
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115 | the_semaphore, |
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116 | scheduler_id, |
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117 | new_priority, |
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118 | old_priority, |
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119 | &lock_context |
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120 | ); |
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121 | #if defined(RTEMS_MULTIPROCESSING) |
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122 | case OBJECTS_REMOTE: |
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123 | return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; |
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124 | #endif |
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125 | case OBJECTS_ERROR: |
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126 | break; |
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127 | } |
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128 | |
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129 | return RTEMS_INVALID_ID; |
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130 | } |
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