1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ClassicRateMonImpl |
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5 | * |
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6 | * @brief Classic Rate Monotonic Scheduler Implementation |
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7 | */ |
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8 | |
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9 | /* COPYRIGHT (c) 1989-2008. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * Copyright (c) 2016 embedded brains GmbH. |
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12 | * COPYRIGHT (c) 2016 Kuan-Hsun Chen. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifndef _RTEMS_RTEMS_RATEMONIMPL_H |
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20 | #define _RTEMS_RTEMS_RATEMONIMPL_H |
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21 | |
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22 | #include <rtems/rtems/ratemondata.h> |
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23 | #include <rtems/score/objectimpl.h> |
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24 | #include <rtems/score/schedulerimpl.h> |
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25 | #include <rtems/score/threadimpl.h> |
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26 | #include <rtems/score/watchdogimpl.h> |
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27 | |
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28 | #include <string.h> |
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29 | |
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30 | #ifdef __cplusplus |
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31 | extern "C" { |
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32 | #endif |
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33 | |
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34 | /** |
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35 | * @defgroup ClassicRateMonImpl Classic Rate Monotonic Scheduler Implementation |
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36 | * |
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37 | * @ingroup ClassicRateMon |
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38 | * |
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39 | * @{ |
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40 | */ |
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41 | |
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42 | #define RATE_MONOTONIC_INTEND_TO_BLOCK \ |
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43 | ( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_INTEND_TO_BLOCK ) |
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44 | |
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45 | #define RATE_MONOTONIC_BLOCKED \ |
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46 | ( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_BLOCKED ) |
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47 | |
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48 | #define RATE_MONOTONIC_READY_AGAIN \ |
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49 | ( THREAD_WAIT_CLASS_PERIOD | THREAD_WAIT_STATE_READY_AGAIN ) |
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50 | |
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51 | /** |
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52 | * @brief Allocates a period control block from |
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53 | * the inactive chain of free period control blocks. |
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54 | * |
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55 | * This function allocates a period control block from |
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56 | * the inactive chain of free period control blocks. |
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57 | */ |
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58 | RTEMS_INLINE_ROUTINE Rate_monotonic_Control *_Rate_monotonic_Allocate( void ) |
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59 | { |
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60 | return (Rate_monotonic_Control *) |
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61 | _Objects_Allocate( &_Rate_monotonic_Information ); |
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62 | } |
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63 | |
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64 | RTEMS_INLINE_ROUTINE void _Rate_monotonic_Acquire_critical( |
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65 | Rate_monotonic_Control *the_period, |
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66 | ISR_lock_Context *lock_context |
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67 | ) |
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68 | { |
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69 | _ISR_lock_Acquire( &the_period->Lock, lock_context ); |
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70 | } |
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71 | |
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72 | RTEMS_INLINE_ROUTINE void _Rate_monotonic_Release( |
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73 | Rate_monotonic_Control *the_period, |
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74 | ISR_lock_Context *lock_context |
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75 | ) |
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76 | { |
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77 | _ISR_lock_Release_and_ISR_enable( &the_period->Lock, lock_context ); |
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78 | } |
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79 | |
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80 | RTEMS_INLINE_ROUTINE Rate_monotonic_Control *_Rate_monotonic_Get( |
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81 | Objects_Id id, |
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82 | ISR_lock_Context *lock_context |
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83 | ) |
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84 | { |
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85 | return (Rate_monotonic_Control *) |
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86 | _Objects_Get( id, lock_context, &_Rate_monotonic_Information ); |
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87 | } |
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88 | |
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89 | void _Rate_monotonic_Timeout( Watchdog_Control *watchdog ); |
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90 | |
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91 | /** |
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92 | * @brief _Rate_monotonic_Get_status( |
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93 | * |
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94 | * This routine is invoked to compute the elapsed wall time and cpu |
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95 | * time for a period. |
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96 | * |
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97 | * @param[in] the_period points to the period being operated upon. |
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98 | * @param[out] wall_since_last_period is set to the wall time elapsed |
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99 | * since the period was initiated. |
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100 | * @param[out] cpu_since_last_period is set to the cpu time used by the |
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101 | * owning thread since the period was initiated. |
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102 | * |
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103 | * @retval This routine returns true if the status can be determined |
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104 | * and false otherwise. |
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105 | */ |
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106 | bool _Rate_monotonic_Get_status( |
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107 | const Rate_monotonic_Control *the_period, |
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108 | Timestamp_Control *wall_since_last_period, |
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109 | Timestamp_Control *cpu_since_last_period |
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110 | ); |
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111 | |
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112 | void _Rate_monotonic_Restart( |
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113 | Rate_monotonic_Control *the_period, |
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114 | Thread_Control *owner, |
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115 | ISR_lock_Context *lock_context |
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116 | ); |
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117 | |
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118 | void _Rate_monotonic_Cancel( |
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119 | Rate_monotonic_Control *the_period, |
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120 | Thread_Control *owner, |
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121 | ISR_lock_Context *lock_context |
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122 | ); |
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123 | |
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124 | RTEMS_INLINE_ROUTINE void _Rate_monotonic_Reset_min_time( |
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125 | Timestamp_Control *min_time |
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126 | ) |
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127 | { |
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128 | _Timestamp_Set( min_time, 0x7fffffff, 0x7fffffff ); |
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129 | } |
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130 | |
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131 | RTEMS_INLINE_ROUTINE void _Rate_monotonic_Reset_statistics( |
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132 | Rate_monotonic_Control *the_period |
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133 | ) |
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134 | { |
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135 | Rate_monotonic_Statistics *statistics; |
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136 | |
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137 | statistics = &the_period->Statistics; |
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138 | memset( statistics, 0, sizeof( *statistics ) ); |
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139 | _Rate_monotonic_Reset_min_time( &statistics->min_wall_time ); |
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140 | _Rate_monotonic_Reset_min_time( &statistics->min_cpu_time ); |
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141 | } |
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142 | |
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143 | /**@}*/ |
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144 | |
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145 | #ifdef __cplusplus |
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146 | } |
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147 | #endif |
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148 | |
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149 | #endif |
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150 | /* end of include file */ |
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