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 | // invoke.h -- |
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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 2016 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Thu Dec 5 16:26:03 2019 |
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13 | // Update Count : 44 |
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14 | // |
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15 | |
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16 | #include "bits/containers.hfa" |
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17 | #include "bits/defs.hfa" |
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18 | #include "bits/locks.hfa" |
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19 | |
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20 | #ifdef __cforall |
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21 | extern "C" { |
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22 | #endif |
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23 | |
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24 | #if ! defined(__CFA_INVOKE_PRIVATE__) |
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25 | #ifndef _INVOKE_H_ |
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26 | #define _INVOKE_H_ |
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27 | |
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28 | #ifdef __ARM_ARCH |
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29 | // function prototypes are only really used by these macros on ARM |
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30 | void disable_global_interrupts(); |
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31 | void enable_global_interrupts(); |
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32 | |
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33 | #define TL_GET( member ) ( { __typeof__( kernelTLS.member ) target; \ |
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34 | disable_global_interrupts(); \ |
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35 | target = kernelTLS.member; \ |
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36 | enable_global_interrupts(); \ |
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37 | target; } ) |
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38 | #define TL_SET( member, value ) disable_global_interrupts(); \ |
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39 | kernelTLS.member = value; \ |
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40 | enable_global_interrupts(); |
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41 | #else |
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42 | #define TL_GET( member ) kernelTLS.member |
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43 | #define TL_SET( member, value ) kernelTLS.member = value; |
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44 | #endif |
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45 | |
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46 | #ifdef __cforall |
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47 | extern "Cforall" { |
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48 | extern __attribute__((aligned(128))) thread_local struct KernelThreadData { |
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49 | struct $thread * volatile this_thread; |
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50 | struct processor * volatile this_processor; |
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51 | |
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52 | struct { |
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53 | volatile unsigned short disable_count; |
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54 | volatile bool enabled; |
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55 | volatile bool in_progress; |
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56 | } preemption_state; |
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57 | |
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58 | uint32_t rand_seed; |
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59 | } kernelTLS __attribute__ ((tls_model ( "initial-exec" ))); |
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60 | } |
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61 | #endif |
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62 | |
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63 | struct __stack_context_t { |
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64 | void * SP; |
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65 | void * FP; |
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66 | }; |
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67 | |
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68 | // low adresses : +----------------------+ <- start of allocation |
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69 | // | optional guard page | |
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70 | // +----------------------+ <- __stack_t.limit |
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71 | // | | |
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72 | // | /\ /\ /\ | |
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73 | // | || || || | |
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74 | // | | |
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75 | // | program stack | |
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76 | // | | |
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77 | // __stack_info_t.storage -> +----------------------+ <- __stack_t.base |
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78 | // | __stack_t | |
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79 | // high adresses : +----------------------+ <- end of allocation |
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80 | |
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81 | struct __stack_t { |
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82 | // stack grows towards stack limit |
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83 | void * limit; |
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84 | |
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85 | // base of stack |
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86 | void * base; |
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87 | }; |
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88 | |
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89 | struct __stack_info_t { |
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90 | // pointer to stack |
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91 | struct __stack_t * storage; |
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92 | }; |
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93 | |
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94 | enum coroutine_state { Halted, Start, Primed, Blocked, Ready, Active, Rerun }; |
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95 | enum __Preemption_Reason { __NO_PREEMPTION, __ALARM_PREEMPTION, __POLL_PREEMPTION, __MANUAL_PREEMPTION }; |
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96 | |
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97 | struct $coroutine { |
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98 | // context that is switch during a __cfactx_switch |
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99 | struct __stack_context_t context; |
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100 | |
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101 | // stack information of the coroutine |
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102 | struct __stack_info_t stack; |
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103 | |
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104 | // textual name for coroutine/task |
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105 | const char * name; |
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106 | |
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107 | // current execution status for coroutine |
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108 | enum coroutine_state state; |
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109 | |
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110 | // first coroutine to resume this one |
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111 | struct $coroutine * starter; |
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112 | |
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113 | // last coroutine to resume this one |
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114 | struct $coroutine * last; |
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115 | |
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116 | // If non-null stack must be unwound with this exception |
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117 | struct _Unwind_Exception * cancellation; |
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118 | |
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119 | }; |
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120 | |
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121 | static inline struct __stack_t * __get_stack( struct $coroutine * cor ) { return (struct __stack_t*)(((uintptr_t)cor->stack.storage) & ((uintptr_t)-2)); } |
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122 | |
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123 | // struct which calls the monitor is accepting |
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124 | struct __waitfor_mask_t { |
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125 | // the index of the accepted function, -1 if none |
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126 | short * accepted; |
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127 | |
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128 | // list of acceptable functions, null if any |
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129 | __cfa_anonymous_object( __small_array_t(struct __acceptable_t) ); |
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130 | }; |
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131 | |
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132 | struct $monitor { |
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133 | // spinlock to protect internal data |
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134 | struct __spinlock_t lock; |
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135 | |
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136 | // current owner of the monitor |
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137 | struct $thread * owner; |
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138 | |
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139 | // queue of threads that are blocked waiting for the monitor |
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140 | __queue_t(struct $thread) entry_queue; |
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141 | |
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142 | // stack of conditions to run next once we exit the monitor |
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143 | __stack_t(struct __condition_criterion_t) signal_stack; |
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144 | |
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145 | // monitor routines can be called recursively, we need to keep track of that |
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146 | unsigned int recursion; |
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147 | |
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148 | // mask used to know if some thread is waiting for something while holding the monitor |
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149 | struct __waitfor_mask_t mask; |
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150 | |
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151 | // node used to signal the dtor in a waitfor dtor |
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152 | struct __condition_node_t * dtor_node; |
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153 | }; |
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154 | |
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155 | struct __monitor_group_t { |
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156 | // currently held monitors |
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157 | __cfa_anonymous_object( __small_array_t($monitor*) ); |
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158 | |
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159 | // last function that acquired monitors |
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160 | fptr_t func; |
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161 | }; |
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162 | |
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163 | // Link lists fields |
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164 | // instrusive link field for threads |
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165 | struct __thread_desc_link { |
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166 | struct $thread * next; |
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167 | struct $thread * prev; |
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168 | volatile unsigned long long ts; |
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169 | }; |
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170 | |
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171 | struct $thread { |
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172 | // Core threading fields |
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173 | // context that is switch during a __cfactx_switch |
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174 | struct __stack_context_t context; |
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175 | |
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176 | // current execution status for coroutine |
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177 | volatile int state; |
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178 | enum __Preemption_Reason preempted; |
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179 | |
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180 | //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it |
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181 | |
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182 | // coroutine body used to store context |
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183 | struct $coroutine self_cor; |
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184 | |
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185 | // current active context |
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186 | struct $coroutine * curr_cor; |
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187 | |
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188 | // monitor body used for mutual exclusion |
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189 | struct $monitor self_mon; |
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190 | |
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191 | // pointer to monitor with sufficient lifetime for current monitors |
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192 | struct $monitor * self_mon_p; |
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193 | |
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194 | // pointer to the cluster on which the thread is running |
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195 | struct cluster * curr_cluster; |
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196 | |
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197 | // monitors currently held by this thread |
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198 | struct __monitor_group_t monitors; |
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199 | |
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200 | // Link lists fields |
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201 | // instrusive link field for threads |
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202 | struct __thread_desc_link link; |
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203 | |
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204 | struct { |
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205 | struct $thread * next; |
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206 | struct $thread * prev; |
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207 | } node; |
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208 | |
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209 | #ifdef __CFA_DEBUG__ |
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210 | // previous function to park/unpark the thread |
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211 | const char * park_caller; |
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212 | enum coroutine_state park_result; |
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213 | bool park_stale; |
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214 | const char * unpark_caller; |
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215 | enum coroutine_state unpark_result; |
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216 | bool unpark_stale; |
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217 | #endif |
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218 | }; |
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219 | |
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220 | #ifdef __CFA_DEBUG__ |
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221 | void __cfaabi_dbg_record_thrd($thread & this, bool park, const char prev_name[]); |
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222 | #else |
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223 | #define __cfaabi_dbg_record_thrd(x, y, z) |
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224 | #endif |
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225 | |
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226 | #ifdef __cforall |
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227 | extern "Cforall" { |
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228 | |
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229 | static inline $thread *& get_next( $thread & this ) __attribute__((const)) { |
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230 | return this.link.next; |
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231 | } |
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232 | |
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233 | static inline [$thread *&, $thread *& ] __get( $thread & this ) __attribute__((const)) { |
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234 | return this.node.[next, prev]; |
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235 | } |
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236 | |
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237 | static inline void ?{}(__monitor_group_t & this) { |
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238 | (this.data){0p}; |
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239 | (this.size){0}; |
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240 | (this.func){NULL}; |
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241 | } |
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242 | |
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243 | static inline void ?{}(__monitor_group_t & this, struct $monitor ** data, __lock_size_t size, fptr_t func) { |
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244 | (this.data){data}; |
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245 | (this.size){size}; |
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246 | (this.func){func}; |
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247 | } |
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248 | |
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249 | static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) { |
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250 | if( (lhs.data != 0) != (rhs.data != 0) ) return false; |
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251 | if( lhs.size != rhs.size ) return false; |
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252 | if( lhs.func != rhs.func ) return false; |
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253 | |
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254 | // Check that all the monitors match |
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255 | for( int i = 0; i < lhs.size; i++ ) { |
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256 | // If not a match, check next function |
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257 | if( lhs[i] != rhs[i] ) return false; |
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258 | } |
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259 | |
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260 | return true; |
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261 | } |
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262 | |
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263 | static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) { |
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264 | lhs.data = rhs.data; |
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265 | lhs.size = rhs.size; |
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266 | lhs.func = rhs.func; |
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267 | } |
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268 | } |
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269 | #endif |
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270 | |
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271 | #endif //_INVOKE_H_ |
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272 | #else //! defined(__CFA_INVOKE_PRIVATE__) |
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273 | #ifndef _INVOKE_PRIVATE_H_ |
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274 | #define _INVOKE_PRIVATE_H_ |
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275 | |
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276 | struct machine_context_t { |
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277 | void *SP; |
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278 | void *FP; |
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279 | void *PC; |
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280 | }; |
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281 | |
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282 | // assembler routines that performs the context switch |
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283 | extern void __cfactx_invoke_stub( void ); |
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284 | extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch"); |
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285 | // void CtxStore ( void * this ) asm ("CtxStore"); |
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286 | // void CtxRet ( void * dst ) asm ("CtxRet"); |
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287 | |
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288 | #endif //_INVOKE_PRIVATE_H_ |
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289 | #endif //! defined(__CFA_INVOKE_PRIVATE__) |
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290 | #ifdef __cforall |
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291 | } |
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292 | #endif |
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293 | |
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294 | // Local Variables: // |
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295 | // mode: c // |
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296 | // tab-width: 4 // |
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297 | // End: // |
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