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 <stdbool.h> |
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17 | #include <stdint.h> |
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18 | |
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19 | #ifdef __CFORALL__ |
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20 | extern "C" { |
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21 | #endif |
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22 | |
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23 | #if ! defined(__CFA_INVOKE_PRIVATE__) |
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24 | #ifndef _INVOKE_H_ |
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25 | #define _INVOKE_H_ |
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26 | |
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27 | #define unlikely(x) __builtin_expect(!!(x), 0) |
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28 | #define thread_local _Thread_local |
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29 | |
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30 | typedef void (*fptr_t)(); |
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31 | |
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32 | struct spinlock { |
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33 | volatile int lock; |
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34 | #ifdef __CFA_DEBUG__ |
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35 | const char * prev_name; |
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36 | void* prev_thrd; |
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37 | #endif |
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38 | }; |
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39 | |
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40 | struct __thread_queue_t { |
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41 | struct thread_desc * head; |
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42 | struct thread_desc ** tail; |
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43 | }; |
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44 | |
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45 | struct __condition_stack_t { |
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46 | struct __condition_criterion_t * top; |
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47 | }; |
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48 | |
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49 | #ifdef __CFORALL__ |
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50 | extern "Cforall" { |
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51 | void ?{}( struct __thread_queue_t & ); |
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52 | void append( struct __thread_queue_t *, struct thread_desc * ); |
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53 | struct thread_desc * pop_head( struct __thread_queue_t * ); |
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54 | struct thread_desc * remove( struct __thread_queue_t *, struct thread_desc ** ); |
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55 | |
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56 | void ?{}( struct __condition_stack_t & ); |
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57 | void push( struct __condition_stack_t *, struct __condition_criterion_t * ); |
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58 | struct __condition_criterion_t * pop( struct __condition_stack_t * ); |
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59 | |
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60 | void ?{}(spinlock & this); |
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61 | void ^?{}(spinlock & this); |
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62 | } |
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63 | #endif |
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64 | |
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65 | struct coStack_t { |
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66 | unsigned int size; // size of stack |
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67 | void *storage; // pointer to stack |
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68 | void *limit; // stack grows towards stack limit |
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69 | void *base; // base of stack |
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70 | void *context; // address of cfa_context_t |
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71 | void *top; // address of top of storage |
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72 | bool userStack; // whether or not the user allocated the stack |
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73 | }; |
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74 | |
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75 | enum coroutine_state { Halted, Start, Inactive, Active, Primed }; |
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76 | |
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77 | struct coroutine_desc { |
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78 | struct coStack_t stack; // stack information of the coroutine |
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79 | const char *name; // textual name for coroutine/task, initialized by uC++ generated code |
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80 | int errno_; // copy of global UNIX variable errno |
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81 | enum coroutine_state state; // current execution status for coroutine |
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82 | struct coroutine_desc * starter; // first coroutine to resume this one |
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83 | struct coroutine_desc * last; // last coroutine to resume this one |
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84 | }; |
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85 | |
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86 | struct __waitfor_mask_t { |
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87 | short * accepted; // the index of the accepted function, -1 if none |
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88 | struct __acceptable_t * clauses; // list of acceptable functions, null if any |
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89 | short size; // number of acceptable functions |
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90 | }; |
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91 | |
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92 | struct monitor_desc { |
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93 | struct spinlock lock; // spinlock to protect internal data |
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94 | struct thread_desc * owner; // current owner of the monitor |
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95 | struct __thread_queue_t entry_queue; // queue of threads that are blocked waiting for the monitor |
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96 | struct __condition_stack_t signal_stack; // stack of conditions to run next once we exit the monitor |
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97 | unsigned int recursion; // monitor routines can be called recursively, we need to keep track of that |
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98 | struct __waitfor_mask_t mask; // mask used to know if some thread is waiting for something while holding the monitor |
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99 | }; |
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100 | |
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101 | struct __monitor_group_t { |
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102 | struct monitor_desc ** list; // currently held monitors |
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103 | short size; // number of currently held monitors |
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104 | fptr_t func; // last function that acquired monitors |
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105 | }; |
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106 | |
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107 | struct thread_desc { |
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108 | // Core threading fields |
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109 | struct coroutine_desc self_cor; // coroutine body used to store context |
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110 | struct monitor_desc self_mon; // monitor body used for mutual exclusion |
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111 | struct monitor_desc * self_mon_p; // pointer to monitor with sufficient lifetime for current monitors |
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112 | struct __monitor_group_t monitors; // monitors currently held by this thread |
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113 | |
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114 | // Link lists fields |
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115 | struct thread_desc * next; // instrusive link field for threads |
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116 | |
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117 | |
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118 | }; |
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119 | |
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120 | #ifdef __CFORALL__ |
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121 | extern "Cforall" { |
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122 | static inline monitor_desc * ?[?]( const __monitor_group_t & this, ptrdiff_t index ) { |
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123 | return this.list[index]; |
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124 | } |
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125 | |
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126 | static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) { |
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127 | if( lhs.size != rhs.size ) return false; |
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128 | if( lhs.func != rhs.func ) return false; |
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129 | |
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130 | // Check that all the monitors match |
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131 | for( int i = 0; i < lhs.size; i++ ) { |
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132 | // If not a match, check next function |
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133 | if( lhs[i] != rhs[i] ) return false; |
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134 | } |
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135 | |
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136 | return true; |
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137 | } |
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138 | } |
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139 | #endif |
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140 | |
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141 | #endif //_INVOKE_H_ |
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142 | #else //! defined(__CFA_INVOKE_PRIVATE__) |
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143 | #ifndef _INVOKE_PRIVATE_H_ |
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144 | #define _INVOKE_PRIVATE_H_ |
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145 | |
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146 | struct machine_context_t { |
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147 | void *SP; |
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148 | void *FP; |
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149 | void *PC; |
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150 | }; |
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151 | |
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152 | // assembler routines that performs the context switch |
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153 | extern void CtxInvokeStub( void ); |
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154 | void CtxSwitch( void * from, void * to ) asm ("CtxSwitch"); |
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155 | |
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156 | #if defined( __x86_64__ ) |
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157 | #define CtxGet( ctx ) __asm__ ( \ |
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158 | "movq %%rsp,%0\n" \ |
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159 | "movq %%rbp,%1\n" \ |
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160 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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161 | #elif defined( __i386__ ) |
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162 | #define CtxGet( ctx ) __asm__ ( \ |
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163 | "movl %%esp,%0\n" \ |
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164 | "movl %%ebp,%1\n" \ |
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165 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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166 | #endif |
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167 | |
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168 | #endif //_INVOKE_PRIVATE_H_ |
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169 | #endif //! defined(__CFA_INVOKE_PRIVATE__) |
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170 | #ifdef __CFORALL__ |
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171 | } |
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172 | #endif |
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173 | |
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174 | // Local Variables: // |
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175 | // mode: c // |
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176 | // tab-width: 4 // |
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177 | // End: // |
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