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 : Fri Jul 21 22:28:56 2017 |
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13 | // Update Count : 1 |
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14 | // |
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15 | |
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16 | #include "bits/containers.h" |
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17 | #include "bits/defs.h" |
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18 | #include "bits/locks.h" |
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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 __cforall |
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29 | extern "Cforall" { |
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30 | static inline struct thread_desc * & get_next( struct thread_desc & this ); |
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31 | static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this ); |
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32 | } |
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33 | #endif |
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34 | |
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35 | struct coStack_t { |
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36 | // size of stack |
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37 | size_t size; |
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38 | |
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39 | // pointer to stack |
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40 | void *storage; |
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41 | |
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42 | // stack grows towards stack limit |
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43 | void *limit; |
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44 | |
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45 | // base of stack |
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46 | void *base; |
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47 | |
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48 | // address of cfa_context_t |
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49 | void *context; |
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50 | |
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51 | // address of top of storage |
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52 | void *top; |
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53 | |
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54 | // whether or not the user allocated the stack |
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55 | bool userStack; |
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56 | }; |
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57 | |
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58 | enum coroutine_state { Halted, Start, Inactive, Active, Primed }; |
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59 | |
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60 | struct coroutine_desc { |
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61 | // stack information of the coroutine |
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62 | struct coStack_t stack; |
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63 | |
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64 | // textual name for coroutine/task, initialized by uC++ generated code |
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65 | const char *name; |
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66 | |
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67 | // copy of global UNIX variable errno |
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68 | int errno_; |
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69 | |
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70 | // current execution status for coroutine |
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71 | enum coroutine_state state; |
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72 | |
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73 | // first coroutine to resume this one |
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74 | struct coroutine_desc * starter; |
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75 | |
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76 | // last coroutine to resume this one |
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77 | struct coroutine_desc * last; |
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78 | }; |
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79 | |
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80 | struct __waitfor_mask_t { |
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81 | // the index of the accepted function, -1 if none |
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82 | short * accepted; |
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83 | |
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84 | // list of acceptable functions, null if any |
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85 | __small_array_t(struct __acceptable_t) __cfa_anonymous_object; |
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86 | }; |
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87 | |
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88 | struct monitor_desc { |
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89 | // spinlock to protect internal data |
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90 | struct __spinlock_t lock; |
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91 | |
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92 | // current owner of the monitor |
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93 | struct thread_desc * owner; |
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94 | |
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95 | // queue of threads that are blocked waiting for the monitor |
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96 | __queue_t(struct thread_desc) entry_queue; |
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97 | |
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98 | // stack of conditions to run next once we exit the monitor |
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99 | __stack_t(struct __condition_criterion_t) signal_stack; |
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100 | |
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101 | // monitor routines can be called recursively, we need to keep track of that |
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102 | unsigned int recursion; |
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103 | |
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104 | // mask used to know if some thread is waiting for something while holding the monitor |
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105 | struct __waitfor_mask_t mask; |
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106 | |
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107 | // node used to signal the dtor in a waitfor dtor |
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108 | struct __condition_node_t * dtor_node; |
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109 | }; |
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110 | |
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111 | struct __monitor_group_t { |
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112 | // currently held monitors |
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113 | __small_array_t(monitor_desc*) __cfa_anonymous_object; |
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114 | |
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115 | // last function that acquired monitors |
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116 | fptr_t func; |
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117 | }; |
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118 | |
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119 | struct thread_desc { |
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120 | // Core threading fields |
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121 | // coroutine body used to store context |
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122 | struct coroutine_desc self_cor; |
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123 | |
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124 | // monitor body used for mutual exclusion |
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125 | struct monitor_desc self_mon; |
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126 | |
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127 | // pointer to monitor with sufficient lifetime for current monitors |
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128 | struct monitor_desc * self_mon_p; |
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129 | |
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130 | // monitors currently held by this thread |
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131 | struct __monitor_group_t monitors; |
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132 | |
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133 | // Link lists fields |
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134 | // instrusive link field for threads |
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135 | struct thread_desc * next; |
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136 | }; |
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137 | |
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138 | #ifdef __cforall |
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139 | extern "Cforall" { |
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140 | static inline thread_desc * & get_next( thread_desc & this ) { |
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141 | return this.next; |
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142 | } |
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143 | |
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144 | static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this ); |
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145 | |
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146 | static inline void ?{}(__monitor_group_t & this) { |
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147 | (this.data){NULL}; |
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148 | (this.size){0}; |
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149 | (this.func){NULL}; |
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150 | } |
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151 | |
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152 | static inline void ?{}(__monitor_group_t & this, struct monitor_desc ** data, __lock_size_t size, fptr_t func) { |
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153 | (this.data){data}; |
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154 | (this.size){size}; |
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155 | (this.func){func}; |
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156 | } |
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157 | |
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158 | static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) { |
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159 | if( (lhs.data != 0) != (rhs.data != 0) ) return false; |
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160 | if( lhs.size != rhs.size ) return false; |
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161 | if( lhs.func != rhs.func ) return false; |
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162 | |
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163 | // Check that all the monitors match |
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164 | for( int i = 0; i < lhs.size; i++ ) { |
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165 | // If not a match, check next function |
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166 | if( lhs[i] != rhs[i] ) return false; |
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167 | } |
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168 | |
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169 | return true; |
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170 | } |
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171 | |
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172 | static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) { |
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173 | lhs.data = rhs.data; |
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174 | lhs.size = rhs.size; |
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175 | lhs.func = rhs.func; |
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176 | } |
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177 | } |
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178 | #endif |
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179 | |
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180 | #endif //_INVOKE_H_ |
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181 | #else //! defined(__CFA_INVOKE_PRIVATE__) |
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182 | #ifndef _INVOKE_PRIVATE_H_ |
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183 | #define _INVOKE_PRIVATE_H_ |
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184 | |
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185 | struct machine_context_t { |
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186 | void *SP; |
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187 | void *FP; |
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188 | void *PC; |
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189 | }; |
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190 | |
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191 | // assembler routines that performs the context switch |
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192 | extern void CtxInvokeStub( void ); |
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193 | void CtxSwitch( void * from, void * to ) asm ("CtxSwitch"); |
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194 | |
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195 | #if defined( __x86_64__ ) |
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196 | #define CtxGet( ctx ) __asm__ ( \ |
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197 | "movq %%rsp,%0\n" \ |
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198 | "movq %%rbp,%1\n" \ |
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199 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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200 | #elif defined( __i386__ ) |
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201 | #define CtxGet( ctx ) __asm__ ( \ |
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202 | "movl %%esp,%0\n" \ |
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203 | "movl %%ebp,%1\n" \ |
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204 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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205 | #endif |
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206 | |
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207 | #endif //_INVOKE_PRIVATE_H_ |
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208 | #endif //! defined(__CFA_INVOKE_PRIVATE__) |
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209 | #ifdef __cforall |
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210 | } |
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211 | #endif |
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212 | |
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213 | // Local Variables: // |
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214 | // mode: c // |
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215 | // tab-width: 4 // |
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216 | // End: // |
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