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 RTEMSImplClassicModes |
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7 | * |
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8 | * @brief This header file provides the implementation interfaces of |
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9 | * the @ref RTEMSImplClassicModes support. |
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10 | */ |
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11 | |
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12 | /* COPYRIGHT (c) 1989-2008. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * |
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15 | * Redistribution and use in source and binary forms, with or without |
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16 | * modification, are permitted provided that the following conditions |
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17 | * are met: |
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18 | * 1. Redistributions of source code must retain the above copyright |
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19 | * notice, this list of conditions and the following disclaimer. |
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20 | * 2. Redistributions in binary form must reproduce the above copyright |
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21 | * notice, this list of conditions and the following disclaimer in the |
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22 | * documentation and/or other materials provided with the distribution. |
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23 | * |
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24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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34 | * POSSIBILITY OF SUCH DAMAGE. |
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35 | */ |
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36 | |
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37 | #ifndef _RTEMS_RTEMS_MODESIMPL_H |
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38 | #define _RTEMS_RTEMS_MODESIMPL_H |
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39 | |
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40 | #include <rtems/rtems/modes.h> |
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41 | #include <rtems/score/schedulerimpl.h> |
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42 | #include <rtems/score/smpimpl.h> |
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43 | #include <rtems/score/threadimpl.h> |
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44 | #include <rtems/score/threadcpubudget.h> |
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45 | #include <rtems/config.h> |
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46 | |
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47 | #ifdef __cplusplus |
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48 | extern "C" { |
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49 | #endif |
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50 | |
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51 | /** |
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52 | * @defgroup RTEMSImplClassicModes Task Modes |
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53 | * |
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54 | * @ingroup RTEMSImplClassic |
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55 | * |
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56 | * @brief This group contains the implementation to support task modes. |
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57 | * |
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58 | * @{ |
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59 | */ |
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60 | |
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61 | /** |
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62 | * @brief Checks if mode_set says that Asynchronous Signal Processing is disabled. |
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63 | * |
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64 | * This function returns TRUE if mode_set indicates that Asynchronous |
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65 | * Signal Processing is disabled, and FALSE otherwise. |
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66 | */ |
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67 | static inline bool _Modes_Is_asr_disabled ( |
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68 | rtems_mode mode_set |
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69 | ) |
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70 | { |
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71 | return (mode_set & RTEMS_ASR_MASK) == RTEMS_NO_ASR; |
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72 | } |
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73 | |
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74 | /** |
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75 | * @brief Checks if mode_set indicates that preemption is enabled. |
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76 | * |
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77 | * This function returns TRUE if mode_set indicates that preemption |
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78 | * is enabled, and FALSE otherwise. |
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79 | */ |
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80 | static inline bool _Modes_Is_preempt ( |
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81 | rtems_mode mode_set |
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82 | ) |
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83 | { |
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84 | return (mode_set & RTEMS_PREEMPT_MASK) == RTEMS_PREEMPT; |
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85 | } |
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86 | |
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87 | /** |
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88 | * @brief Checks if mode_set indicates that timeslicing is enabled. |
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89 | * |
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90 | * This function returns TRUE if mode_set indicates that timeslicing |
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91 | * is enabled, and FALSE otherwise. |
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92 | */ |
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93 | static inline bool _Modes_Is_timeslice ( |
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94 | rtems_mode mode_set |
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95 | ) |
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96 | { |
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97 | return (mode_set & RTEMS_TIMESLICE_MASK) == RTEMS_TIMESLICE; |
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98 | } |
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99 | |
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100 | /** |
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101 | * @brief Gets the interrupt level portion of the mode_set. |
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102 | * |
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103 | * This function returns the interrupt level portion of the mode_set. |
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104 | */ |
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105 | static inline ISR_Level _Modes_Get_interrupt_level ( |
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106 | rtems_mode mode_set |
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107 | ) |
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108 | { |
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109 | return ( mode_set & RTEMS_INTERRUPT_MASK ); |
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110 | } |
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111 | |
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112 | #if defined(RTEMS_SMP) || CPU_ENABLE_ROBUST_THREAD_DISPATCH == TRUE |
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113 | /** |
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114 | * @brief Checks if support for the interrupt level is implemented. |
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115 | * |
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116 | * @param mode_set is the mode set which specifies the interrupt level to |
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117 | * check. |
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118 | * |
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119 | * @return Returns true, if support for the interrupt level is implemented, |
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120 | * otherwise returns false. |
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121 | */ |
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122 | static inline bool _Modes_Is_interrupt_level_supported( |
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123 | rtems_mode mode_set |
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124 | ) |
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125 | { |
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126 | return _Modes_Get_interrupt_level( mode_set ) == 0 |
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127 | #if CPU_ENABLE_ROBUST_THREAD_DISPATCH == FALSE |
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128 | || !_SMP_Need_inter_processor_interrupts() |
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129 | #endif |
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130 | ; |
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131 | } |
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132 | #endif |
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133 | |
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134 | #if defined(RTEMS_SMP) |
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135 | /** |
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136 | * @brief Checks if support for the preempt mode is implemented. |
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137 | * |
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138 | * @param mode_set is the mode set which specifies the preempt mode to check. |
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139 | * |
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140 | * @param the_thread is the thread to check. |
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141 | * |
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142 | * @return Returns true, if support for the preempt mode is implemented, |
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143 | * otherwise returns false. |
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144 | */ |
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145 | static inline bool _Modes_Is_preempt_mode_supported( |
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146 | rtems_mode mode_set, |
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147 | const Thread_Control *the_thread |
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148 | ) |
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149 | { |
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150 | return _Modes_Is_preempt( mode_set ) || |
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151 | _Scheduler_Is_non_preempt_mode_supported( |
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152 | _Thread_Scheduler_get_home( the_thread ) |
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153 | ); |
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154 | } |
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155 | #endif |
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156 | |
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157 | /** |
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158 | * @brief Applies the timeslice mode to the thread. |
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159 | * |
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160 | * @param mode_set is the mode set which specifies the timeslice mode for the |
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161 | * thread. |
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162 | * |
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163 | * @param[out] the_thread is the thread to apply the timeslice mode. |
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164 | */ |
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165 | static inline void _Modes_Apply_timeslice_to_thread( |
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166 | rtems_mode mode_set, |
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167 | Thread_Control *the_thread |
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168 | ) |
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169 | { |
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170 | if ( _Modes_Is_timeslice( mode_set ) ) { |
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171 | the_thread->CPU_budget.operations = &_Thread_CPU_budget_reset_timeslice; |
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172 | the_thread->CPU_budget.available = |
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173 | rtems_configuration_get_ticks_per_timeslice(); |
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174 | } else { |
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175 | the_thread->CPU_budget.operations = NULL; |
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176 | } |
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177 | } |
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178 | |
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179 | #ifdef __cplusplus |
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180 | } |
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181 | #endif |
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182 | |
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183 | /**@}*/ |
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184 | |
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185 | #endif |
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186 | /* end of include file */ |
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