1 | ;;;; synch.scm |
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2 | ;;;; Kon Lovett, Mar '06 |
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3 | |
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4 | (declare |
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5 | (usual-integrations) |
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6 | (disable-interrupts) |
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7 | (inline) |
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8 | (fixnum) |
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9 | (local) |
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10 | (no-procedure-checks) |
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11 | (no-bound-checks) ) |
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12 | |
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13 | ;;; |
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14 | |
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15 | (require-library srfi-18) |
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16 | |
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17 | ;;; |
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18 | |
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19 | (module synch ( |
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20 | make-object/synch |
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21 | object?/synch |
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22 | set-object!/synch |
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23 | synch |
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24 | synch-with |
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25 | call/synch |
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26 | call-with/synch |
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27 | apply/synch |
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28 | apply-with/synch |
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29 | let/synch |
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30 | set!/synch |
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31 | synch/lock |
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32 | synch/unlock |
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33 | object/synch |
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34 | record/synch |
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35 | record-synch/lock |
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36 | record-synch/unlock |
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37 | %synch-mutex* |
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38 | %synch-mutex-with* |
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39 | %synch |
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40 | %synch-with |
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41 | %call/synch |
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42 | %call-with/synch |
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43 | %apply/synch |
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44 | %apply-with/synch |
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45 | %let/synch |
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46 | %set!/synch |
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47 | %synch/lock |
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48 | %synch/unlock |
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49 | %object/synch |
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50 | %record/synch |
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51 | %record-synch/lock |
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52 | %record-synch/unlock) |
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53 | |
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54 | (import |
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55 | scheme |
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56 | (only chicken |
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57 | unless |
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58 | warning |
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59 | gensym |
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60 | constantly |
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61 | dynamic-wind) |
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62 | (only srfi-18 |
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63 | thread? |
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64 | make-mutex |
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65 | mutex? |
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66 | mutex-specific mutex-specific-set! |
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67 | mutex-lock! mutex-unlock! |
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68 | mutex-state) ) |
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69 | |
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70 | ;;; |
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71 | |
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72 | (define-for-syntax (recmuxnam nam) |
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73 | (string->symbol (conc nam #\- 'mutex)) ) |
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74 | |
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75 | ;;; |
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76 | |
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77 | (define (make-object/synch obj #!optional (name '(synchobj))) |
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78 | (let ([mutex (make-mutex (if (pair? name) (gensym (car name)) name))]) |
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79 | (mutex-specific-set! mutex obj) |
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80 | mutex ) ) |
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81 | |
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82 | (define object?/synch |
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83 | (let ([tpred (constantly #t)]) |
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84 | (lambda (obj #!optional (pred tpred)) |
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85 | (and (mutex? obj) |
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86 | (let ([ms (mutex-specific obj)]) |
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87 | (and (not (eq? (void) ms)) |
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88 | (pred ms)) ) ) ) ) ) |
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89 | |
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90 | ;;; Synonyms |
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91 | |
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92 | (define-syntax set-object!/synch |
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93 | (syntax-rules () |
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94 | [(_ ?mutex ?obj) (mutex-specific-set! ?mutex ?obj) ] ) ) |
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95 | |
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96 | ;;; Protected |
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97 | |
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98 | (define-syntax synch |
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99 | (syntax-rules () |
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100 | [(_ ?mtx ?body ...) |
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101 | (let ([mtx ?mtx]) |
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102 | (dynamic-wind |
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103 | (lambda () (mutex-lock! mtx)) |
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104 | (lambda () ?body ...) |
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105 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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106 | |
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107 | (define-syntax synch-with |
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108 | (lambda (form r c) |
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109 | (##sys#check-syntax 'synch-with form '(_ _ variable . #(_ 0))) |
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110 | (let ([$dynamic-wind (r 'dynamic-wind)] |
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111 | [$let (r 'let)] |
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112 | [$lambda (r 'lambda)] |
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113 | [$mutex-unlock! (r 'mutex-unlock!)] |
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114 | [$mutex-specific (r 'mutex-specific)] |
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115 | [$mutex-lock! (r 'mutex-lock!)] |
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116 | [mtxvar (r (gensym))]) |
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117 | (let ([?mtx (cadr form)] [?var (caddr form)] [?body (cdddr form)]) |
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118 | `(,$let ([,mtxvar ,?mtx]) |
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119 | (,$let ([,?var (,$mutex-specific ,mtxvar)]) |
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120 | (,$dynamic-wind |
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121 | (,$lambda () (,$mutex-lock! ,mtxvar)) |
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122 | (,$lambda () ,@?body) |
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123 | (,$lambda () (,$mutex-unlock! ,mtxvar)) ) ) ) ) ) ) ) |
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124 | |
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125 | (define-syntax call/synch |
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126 | (syntax-rules () |
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127 | [(_ ?mtx ?proc ?arg0 ...) |
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128 | (let ([mtx ?mtx]) |
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129 | (dynamic-wind |
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130 | (lambda () (mutex-lock! mtx)) |
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131 | (lambda () (?proc ?arg0 ...)) |
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132 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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133 | |
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134 | (define-syntax call-with/synch |
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135 | (syntax-rules () |
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136 | [(_ ?mtx ?proc ?arg0 ...) |
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137 | (let ([mtx ?mtx]) |
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138 | (dynamic-wind |
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139 | (lambda () (mutex-lock! mtx)) |
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140 | (lambda () (?proc (mutex-specific mtx) ?arg0 ...)) |
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141 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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142 | |
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143 | (define-syntax apply/synch |
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144 | (syntax-rules () |
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145 | [(_ ?mtx ?proc ?arg0 ...) |
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146 | (let ([mtx ?mtx]) |
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147 | (dynamic-wind |
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148 | (lambda () (mutex-lock! mtx)) |
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149 | (lambda () (apply ?proc ?arg0 ...)) |
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150 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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151 | |
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152 | (define-syntax apply-with/synch |
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153 | (syntax-rules () |
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154 | [(_ ?mtx ?proc ?arg0 ...) |
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155 | (let ([mtx ?mtx]) |
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156 | (dynamic-wind |
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157 | (lambda () (mutex-lock! mtx)) |
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158 | (lambda () (apply ?proc (mutex-specific mtx) ?arg0 ...)) |
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159 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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160 | |
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161 | (define-syntax let/synch |
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162 | (lambda (form r c) |
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163 | (##sys#check-syntax 'let/synch form '(_ list . _)) |
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164 | (let ([$synch-with (r 'synch-with)]) |
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165 | (let ([?body (cddr form)]) |
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166 | (car |
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167 | (let loop ([?bnds (cadr form)]) |
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168 | (if (not (null? ?bnds)) |
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169 | (let ([bnd (car ?bnds)]) |
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170 | (##sys#check-syntax 'let/synch bnd '(variable _)) |
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171 | `((,$synch-with ,(cadr bnd) ,(car bnd) ,@(loop (cdr ?bnds)))) ) |
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172 | ?body ) ) ) ) ) ) ) |
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173 | |
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174 | (define-syntax set!/synch |
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175 | (lambda (form r c) |
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176 | (##sys#check-syntax 'set!/synch form '(_ pair . _)) |
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177 | (let ([$synch-with (r 'synch-with)] |
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178 | [$mutex-specific (r 'mutex-specific)] |
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179 | [$mutex-specific-set! (r 'mutex-specific-set!)] |
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180 | [$begin (r 'begin)]) |
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181 | (let ([?bnd (cadr form)] [?body (cddr form)]) |
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182 | (let ([?var (car ?bnd)] [?mtx (cadr ?bnd)]) |
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183 | `(,$synch-with ,?mtx ,?var |
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184 | (,$mutex-specific-set! ,?mtx (,$begin ,@?body)) |
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185 | (,$mutex-specific ,?mtx) ) ) ) ) ) ) |
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186 | |
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187 | #; ;Since not capturing anything shouldn't need to do this |
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188 | (define-syntax synch/lock |
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189 | (lambda (form r c) |
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190 | (##sys#check-syntax 'synch/lock form '(_ _ . _)) |
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191 | (let ([$dynamic-wind (r 'dynamic-wind)] |
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192 | [$unless (r 'unless)] |
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193 | [$begin (r 'begin)] |
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194 | [$let (r 'let)] |
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195 | [$set! (r 'set!)] |
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196 | [$lambda (r 'lambda)] |
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197 | [$mutex-unlock! (r 'mutex-unlock!)] |
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198 | [$mutex-specific (r 'mutex-specific)] |
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199 | [$mutex-lock! (r 'mutex-lock!)] |
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200 | [mtxvar (r (gensym))] |
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201 | [okvar (r (gensym))] |
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202 | [resvar (r (gensym))]) |
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203 | (let ([?mtx (cadr form)] [?body (cddr form)]) |
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204 | `(,$let ([,mtxvar ,?mtx] [,okvar #f]) |
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205 | (,$dynamic-wind |
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206 | (,$lambda () (,$mutex-lock! ,mtxvar)) |
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207 | (,$lambda () (,$let ([,resvar (,$begin ,@?body)]) (,$set! ,okvar #t) ,resvar)) |
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208 | (,$lambda () (,$unless ,okvar (,$mutex-unlock! ,mtxvar))) ) ) ) ) ) ) |
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209 | |
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210 | (define-syntax synch/lock |
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211 | (syntax-rules () |
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212 | [(_ ?mtx ?body ...) |
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213 | (let ([mtx ?mtx] [ok? #f]) |
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214 | (mutex-lock! mtx) |
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215 | (dynamic-wind |
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216 | (lambda () (mutex-lock! mtx)) |
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217 | (lambda () (let ([res (begin ?body ...)]) (set! ok? #t) res)) |
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218 | (lambda () (unless ok? (mutex-unlock! mtx)))) ) ] ) ) |
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219 | |
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220 | (define-syntax synch/unlock |
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221 | (syntax-rules () |
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222 | [(_ ?mtx ?body ...) |
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223 | (let ([mtx ?mtx]) |
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224 | (dynamic-wind |
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225 | (lambda () |
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226 | (unless (thread? (mutex-state mtx)) |
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227 | (warning 'synch/unlock "mutex is not locked - locking") |
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228 | (mutex-lock! mtx))) |
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229 | (lambda () ?body ...) |
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230 | (lambda () (mutex-unlock! mtx)) ) ) ] ) ) |
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231 | |
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232 | (define-syntax object/synch |
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233 | (lambda (form r c) |
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234 | (##sys#check-syntax 'object/synch form '(_ _ . _)) |
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235 | (let ([$synch-with (r 'synch-with)] |
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236 | [$>< (r '><)] |
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237 | [var (r (gensym))] |
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238 | [mtx (cadr form)]) |
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239 | (let body-loop ([unparsed (cddr form)] [parsed '()]) |
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240 | (if (not (null? unparsed)) |
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241 | (let ([expr (car unparsed)] |
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242 | [next (cdr unparsed)]) |
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243 | (let expr-loop ([rest expr] [parsedexpr '()]) |
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244 | (cond [(null? rest) |
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245 | (body-loop next (cons (reverse parsedexpr) parsed))] |
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246 | [(pair? rest) |
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247 | (let ([arg (car rest)] |
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248 | [next (cdr rest)]) |
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249 | (if (c $>< arg) |
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250 | (expr-loop next (cons var parsedexpr)) |
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251 | (expr-loop next (cons arg parsedexpr)) ) )] |
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252 | [(c $>< rest) |
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253 | (body-loop next (cons var parsed))] |
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254 | [else |
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255 | (body-loop next (cons rest parsed))] ) ) ) |
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256 | `(,$synch-with ,mtx ,var ,@(reverse parsed)) ) ) ) ) ) |
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257 | |
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258 | (define-syntax record/synch |
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259 | (lambda (form r c) |
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260 | (##sys#check-syntax 'record/synch form '(_ variable _ . _)) |
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261 | (let ([$synch (r 'synch)]) |
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262 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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263 | `(,$synch (,(recmuxnam ?sym) ,?rec) ,@?body) ) ) ) ) |
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264 | |
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265 | (define-syntax record-synch/lock |
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266 | (lambda (form r c) |
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267 | (##sys#check-syntax 'record-synch/lock form '(_ variable _ . _)) |
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268 | (let ([$synch/lock (r 'synch/lock)]) |
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269 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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270 | `(,$synch/lock (,(recmuxnam ?sym) ,?rec) ,@?body) ) ) ) ) |
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271 | |
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272 | (define-syntax record-synch/unlock |
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273 | (lambda (form r c) |
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274 | (##sys#check-syntax 'record-synch/unlock form '(_ variable _ . _)) |
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275 | (let ([$synch/unlock (r 'synch/unlock)]) |
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276 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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277 | `(,$synch/unlock (,(recmuxnam ?sym) ,?rec) ,@?body) ) ) ) ) |
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278 | |
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279 | ;;; Unprotected |
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280 | |
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281 | (define-syntax %synch-mutex* |
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282 | (syntax-rules () |
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283 | [(_ ?mtx ?body ...) |
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284 | (let ([mtx ?mtx]) |
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285 | (mutex-lock! mtx) |
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286 | (call-with-values |
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287 | (lambda () ?body ...) |
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288 | (lambda ret |
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289 | (mutex-unlock! mtx) |
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290 | (apply values ret))) ) ] ) ) |
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291 | |
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292 | (define-syntax %synch-mutex-with* |
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293 | (lambda (form r c) |
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294 | (##sys#check-syntax '%synch-mutex-with* form '(_ _ variable . _)) |
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295 | (let ([$call-with-values (r 'call-with-values)] |
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296 | [$mutex-specific (r 'mutex-specific)] |
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297 | [$mutex-lock! (r 'mutex-lock!)] |
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298 | [$mutex-unlock! (r 'mutex-unlock!)] |
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299 | [$let (r 'let)] |
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300 | [$apply (r 'apply)] |
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301 | [$values (r 'values)] |
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302 | [$lambda (r 'lambda)] |
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303 | [$ret (r 'ret)] |
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304 | [mtxvar (r (gensym))]) |
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305 | (let ([?mtx (cadr form)] [?var (caddr form)] [?body (cdddr form)]) |
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306 | `(,$let ([,mtxvar ,?mtx]) |
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307 | (,$let ([,?var (,$mutex-specific ,mtxvar)]) |
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308 | (,$mutex-lock! ,mtxvar) |
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309 | (,$call-with-values |
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310 | (,$lambda () ,@?body) |
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311 | (,$lambda ,$ret |
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312 | (,$mutex-unlock! ,mtxvar) |
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313 | (,$apply ,$values ,$ret)) ) ) ) ) ) ) ) |
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314 | |
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315 | (define-syntax %synch |
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316 | (syntax-rules () |
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317 | [(_ ?mtx ?body ...) (%synch-mutex* ?mtx ?body ...) ] ) ) |
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318 | |
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319 | (define-syntax %synch-with |
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320 | (syntax-rules () |
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321 | [(_ ?mtx ?var ?body ...) (%synch-mutex-with* ?mtx ?var ?body ...) ] ) ) |
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322 | |
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323 | (define-syntax %call/synch |
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324 | (syntax-rules () |
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325 | [(_ ?mtx ?proc ?arg0 ...) (%synch-mutex* ?mtx (?proc ?arg0 ...)) ] ) ) |
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326 | |
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327 | (define-syntax %call-with/synch |
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328 | (syntax-rules () |
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329 | [(_ ?mtx ?proc ?arg0 ...) (%synch-mutex-with* ?mtx var (?proc var ?arg0 ...)) ] ) ) |
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330 | |
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331 | (define-syntax %apply/synch |
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332 | (syntax-rules () |
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333 | [(_ ?mtx ?proc ?arg0 ...) (%synch-mutex* ?mtx (apply ?proc ?arg0 ...)) ] ) ) |
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334 | |
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335 | (define-syntax %apply-with/synch |
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336 | (syntax-rules () |
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337 | [(_ ?mtx ?proc ?arg0 ...) (%synch-mutex-with* ?mtx var (apply ?proc var ?arg0 ...)) ] ) ) |
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338 | |
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339 | (define-syntax %let/synch |
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340 | (lambda (form r c) |
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341 | (##sys#check-syntax '%let/synch form '(_ list . _)) |
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342 | (let ([$%synch-with (r '%synch-with)]) |
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343 | (let ([?body (cddr form)]) |
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344 | (car |
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345 | (let loop ([?bnds (cadr form)]) |
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346 | (if (not (null? ?bnds)) |
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347 | (let ([bnd (car ?bnds)]) |
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348 | (##sys#check-syntax '%let/synch bnd '(variable _)) |
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349 | `((,$%synch-with ,(cadr bnd) ,(car bnd) ,@(loop (cdr ?bnds)))) ) |
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350 | ?body ) ) ) ) ) ) ) |
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351 | |
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352 | (define-syntax %set!/synch |
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353 | (lambda (form r c) |
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354 | (##sys#check-syntax '%set!/synch form '(_ pair . _)) |
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355 | (let ([$%synch-with (r '%synch-with)] |
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356 | [$mutex-specific (r 'mutex-specific)] |
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357 | [$mutex-specific-set! (r 'mutex-specific-set!)] |
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358 | [$let (r 'let)] |
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359 | [$begin (r 'begin)] |
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360 | [mtxvar (r (gensym))]) |
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361 | (let ([?bnd (cadr form)] [?body (cddr form)]) |
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362 | (let ([?var (car ?bnd)] [?mtx (cadr ?bnd)]) |
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363 | `(,$let ([,mtxvar ,?mtx]) |
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364 | (,$%synch-with ,mtxvar ,?var |
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365 | (,$mutex-specific-set! ,mtxvar (,$begin ,@?body)) |
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366 | (,$mutex-specific ,mtxvar) ) ) ) ) ) ) ) |
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367 | |
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368 | (define-syntax %synch/lock |
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369 | (syntax-rules () |
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370 | [(_ ?mtx ?body ...) |
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371 | (let ([mtx ?mtx] [ok? #f]) |
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372 | (mutex-lock! mtx) |
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373 | (call-with-values |
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374 | (lambda () (let ([res (begin ?body ...)]) (set! ok? #t) res)) |
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375 | (lambda ret |
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376 | (unless ok? (mutex-unlock! mtx)) |
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377 | (apply values ret))) ) ] ) ) |
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378 | |
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379 | (define-syntax %synch/unlock |
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380 | (syntax-rules () |
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381 | [(_ ?mtx ?body ...) |
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382 | (let ([mtx ?mtx]) |
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383 | (unless (thread? (mutex-state mtx)) |
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384 | (warning '%synch/unlock "mutex is not locked - locking") |
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385 | (mutex-lock! mtx)) |
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386 | (call-with-values |
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387 | (lambda () ?body ...) |
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388 | (lambda ret |
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389 | (mutex-unlock! mtx) |
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390 | (apply values ret)) ) ) ] ) ) |
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391 | |
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392 | (define-syntax %object/synch |
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393 | (lambda (form r c) |
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394 | (##sys#check-syntax '%object/synch form '(_ _ . _)) |
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395 | (let ([$%synch-with (r '%synch-with)] |
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396 | [$>< (r '><)] |
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397 | [var (r (gensym))] |
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398 | [mtx (cadr form)]) |
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399 | (let body-loop ([unparsed (cddr form)] [parsed '()]) |
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400 | (if (not (null? unparsed)) |
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401 | (let ([expr (car unparsed)] |
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402 | [next (cdr unparsed)]) |
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403 | (let expr-loop ([rest expr] [parsedexpr '()]) |
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404 | (cond [(null? rest) |
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405 | (body-loop next (cons (reverse parsedexpr) parsed))] |
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406 | [(pair? rest) |
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407 | (let ([arg (car rest)] |
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408 | [next (cdr rest)]) |
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409 | (if (c $>< arg) |
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410 | (expr-loop next (cons var parsedexpr)) |
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411 | (expr-loop next (cons arg parsedexpr)) ) )] |
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412 | [(c $>< rest) |
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413 | (body-loop next (cons var parsed))] |
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414 | [else |
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415 | (body-loop next (cons rest parsed))] ) ) ) |
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416 | `(,$%synch-with ,mtx ,var ,@(reverse parsed)) ) ) ) ) ) |
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417 | |
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418 | (define-syntax %record/synch |
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419 | (lambda (form r c) |
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420 | (##sys#check-syntax '%record/synch form '(_ variable _ . _)) |
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421 | (let ([$%synch (r '%synch)]) |
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422 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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423 | `(,$%synch (,(recmuxnam ?sym) ,?rec) ?body ...) ) ) ) ) |
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424 | |
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425 | (define-syntax %record-synch/lock |
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426 | (lambda (form r c) |
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427 | (##sys#check-syntax '%record-synch/lock form '(_ variable _ . _)) |
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428 | (let ([$%synch/lock (r '%synch/lock)]) |
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429 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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430 | `(,$%synch/lock (,(recmuxnam ?sym) ,?rec) ,@?body) ) ) ) ) |
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431 | |
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432 | (define-syntax %record-synch/unlock |
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433 | (lambda (form r c) |
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434 | (##sys#check-syntax '%record-synch/unlock form '(_ variable _ . _)) |
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435 | (let ([$%synch/unlock (r '%synch/unlock)]) |
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436 | (let ([?sym (cadr form)] [?rec (caddr form)] [?body (cdddr form)]) |
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437 | `(,$%synch/unlock (,(recmuxnam ?sym) ,?rec) ,@?body) ) ) ) ) |
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438 | |
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439 | ) ;module synch |
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