1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // kernel -- |
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8 | // |
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9 | // Author : Thierry Delisle |
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10 | // Created On : Tue Jan 17 12:27:26 2017 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Tue Feb 4 12:29:26 2020 |
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13 | // Update Count : 22 |
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14 | // |
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15 | |
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16 | #pragma once |
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17 | |
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18 | #include <stdbool.h> |
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19 | |
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20 | #include "invoke.h" |
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21 | #include "time_t.hfa" |
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22 | #include "coroutine.hfa" |
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23 | |
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24 | extern "C" { |
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25 | #include <pthread.h> |
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26 | #include <semaphore.h> |
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27 | } |
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28 | |
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29 | //----------------------------------------------------------------------------- |
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30 | // Locks |
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31 | struct semaphore { |
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32 | __spinlock_t lock; |
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33 | int count; |
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34 | __queue_t($thread) waiting; |
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35 | }; |
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36 | |
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37 | void ?{}(semaphore & this, int count = 1); |
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38 | void ^?{}(semaphore & this); |
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39 | void P (semaphore & this); |
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40 | bool V (semaphore & this); |
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41 | |
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42 | |
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43 | //----------------------------------------------------------------------------- |
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44 | // Processor |
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45 | extern struct cluster * mainCluster; |
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46 | |
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47 | // Processor |
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48 | coroutine processorCtx_t { |
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49 | struct processor * proc; |
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50 | }; |
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51 | |
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52 | // Wrapper around kernel threads |
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53 | struct processor { |
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54 | // Main state |
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55 | // Coroutine ctx who does keeps the state of the processor |
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56 | struct processorCtx_t runner; |
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57 | |
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58 | // Cluster from which to get threads |
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59 | struct cluster * cltr; |
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60 | |
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61 | // Name of the processor |
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62 | const char * name; |
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63 | |
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64 | // Handle to pthreads |
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65 | pthread_t kernel_thread; |
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66 | |
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67 | // RunThread data |
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68 | // Action to do after a thread is ran |
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69 | $thread * destroyer; |
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70 | |
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71 | // Preemption data |
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72 | // Node which is added in the discrete event simulaiton |
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73 | struct alarm_node_t * preemption_alarm; |
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74 | |
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75 | // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible |
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76 | bool pending_preemption; |
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77 | |
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78 | // Idle lock |
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79 | __bin_sem_t idleLock; |
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80 | |
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81 | // Termination |
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82 | // Set to true to notify the processor should terminate |
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83 | volatile bool do_terminate; |
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84 | |
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85 | // Termination synchronisation |
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86 | semaphore terminated; |
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87 | |
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88 | // pthread Stack |
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89 | void * stack; |
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90 | |
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91 | // Link lists fields |
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92 | struct __dbg_node_proc { |
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93 | struct processor * next; |
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94 | struct processor * prev; |
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95 | } node; |
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96 | |
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97 | #ifdef __CFA_DEBUG__ |
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98 | // Last function to enable preemption on this processor |
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99 | const char * last_enable; |
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100 | #endif |
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101 | }; |
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102 | |
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103 | void ?{}(processor & this, const char name[], struct cluster & cltr); |
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104 | void ^?{}(processor & this); |
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105 | |
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106 | static inline void ?{}(processor & this) { this{ "Anonymous Processor", *mainCluster}; } |
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107 | static inline void ?{}(processor & this, struct cluster & cltr) { this{ "Anonymous Processor", cltr}; } |
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108 | static inline void ?{}(processor & this, const char name[]) { this{name, *mainCluster }; } |
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109 | |
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110 | static inline [processor *&, processor *& ] __get( processor & this ) __attribute__((const)) { return this.node.[next, prev]; } |
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111 | |
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112 | //----------------------------------------------------------------------------- |
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113 | // Cluster |
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114 | struct cluster { |
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115 | // Ready queue locks |
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116 | __spinlock_t ready_queue_lock; |
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117 | |
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118 | // Ready queue for threads |
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119 | __queue_t($thread) ready_queue; |
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120 | |
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121 | // Name of the cluster |
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122 | const char * name; |
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123 | |
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124 | // Preemption rate on this cluster |
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125 | Duration preemption_rate; |
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126 | |
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127 | // List of processors |
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128 | __spinlock_t proc_list_lock; |
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129 | __dllist_t(struct processor) procs; |
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130 | __dllist_t(struct processor) idles; |
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131 | unsigned int nprocessors; |
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132 | |
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133 | // List of threads |
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134 | __spinlock_t thread_list_lock; |
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135 | __dllist_t(struct $thread) threads; |
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136 | unsigned int nthreads; |
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137 | |
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138 | // Link lists fields |
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139 | struct __dbg_node_cltr { |
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140 | cluster * next; |
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141 | cluster * prev; |
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142 | } node; |
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143 | }; |
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144 | extern Duration default_preemption(); |
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145 | |
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146 | void ?{} (cluster & this, const char name[], Duration preemption_rate); |
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147 | void ^?{}(cluster & this); |
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148 | |
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149 | static inline void ?{} (cluster & this) { this{"Anonymous Cluster", default_preemption()}; } |
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150 | static inline void ?{} (cluster & this, Duration preemption_rate) { this{"Anonymous Cluster", preemption_rate}; } |
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151 | static inline void ?{} (cluster & this, const char name[]) { this{name, default_preemption()}; } |
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152 | |
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153 | static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; } |
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154 | |
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155 | static inline struct processor * active_processor() { return TL_GET( this_processor ); } // UNSAFE |
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156 | static inline struct cluster * active_cluster () { return TL_GET( this_processor )->cltr; } |
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157 | |
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158 | // Local Variables: // |
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159 | // mode: c // |
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160 | // tab-width: 4 // |
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161 | // End: // |
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