1 | #include <fstream> |
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2 | #include <kernel> |
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3 | #include <monitor> |
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4 | #include <stdlib> |
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5 | #include <thread> |
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6 | |
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7 | static const unsigned long N = 10_000ul; |
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8 | |
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9 | #ifndef PREEMPTION_RATE |
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10 | #define PREEMPTION_RATE 10_000ul |
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11 | #endif |
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12 | |
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13 | unsigned int default_preemption() { |
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14 | return PREEMPTION_RATE; |
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15 | } |
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16 | |
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17 | monitor global_t {}; |
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18 | |
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19 | global_t globalA; |
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20 | global_t globalB; |
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21 | global_t globalC; |
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22 | |
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23 | condition condAB, condAC, condBC, condABC; |
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24 | |
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25 | thread Signaler {}; |
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26 | thread WaiterAB {}; |
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27 | thread WaiterAC {}; |
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28 | thread WaiterBC {}; |
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29 | thread WaiterABC{}; |
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30 | |
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31 | volatile int waiter_left; |
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32 | |
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33 | //---------------------------------------------------------------------------------------------------- |
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34 | // Tools |
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35 | void signal( condition * cond, global_t * mutex a, global_t * mutex b ) { |
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36 | signal( cond ); |
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37 | } |
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38 | |
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39 | void signal( condition * cond, global_t * mutex a, global_t * mutex b, global_t * mutex c ) { |
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40 | signal( cond ); |
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41 | } |
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42 | |
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43 | void wait( condition * cond, global_t * mutex a, global_t * mutex b ) { |
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44 | wait( cond ); |
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45 | } |
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46 | |
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47 | void wait( condition * cond, global_t * mutex a, global_t * mutex b, global_t * mutex c ) { |
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48 | wait( cond ); |
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49 | } |
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50 | |
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51 | //---------------------------------------------------------------------------------------------------- |
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52 | // Signaler |
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53 | void main( Signaler* this ) { |
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54 | |
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55 | while( waiter_left != 0 ) { |
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56 | unsigned action = (unsigned)rand48() % 4; |
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57 | switch( action ) { |
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58 | case 0: |
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59 | signal( &condABC, &globalA, &globalB, &globalC ); |
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60 | break; |
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61 | case 1: |
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62 | signal( &condAB , &globalA, &globalB ); |
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63 | break; |
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64 | case 2: |
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65 | signal( &condBC , &globalB, &globalC ); |
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66 | break; |
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67 | case 3: |
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68 | signal( &condAC , &globalA, &globalC ); |
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69 | break; |
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70 | default: |
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71 | sout | "Something went wrong" | endl; |
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72 | abort(); |
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73 | } |
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74 | yield(); |
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75 | } |
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76 | } |
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77 | |
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78 | //---------------------------------------------------------------------------------------------------- |
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79 | // Waiter ABC |
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80 | void main( WaiterABC* this ) { |
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81 | for( int i = 0; i < N; i++ ) { |
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82 | wait( &condABC, &globalA, &globalB, &globalC ); |
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83 | } |
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84 | |
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85 | __sync_fetch_and_sub_4( &waiter_left, 1); |
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86 | } |
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87 | |
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88 | //---------------------------------------------------------------------------------------------------- |
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89 | // Waiter AB |
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90 | void main( WaiterAB* this ) { |
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91 | for( int i = 0; i < N; i++ ) { |
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92 | wait( &condAB , &globalA, &globalB ); |
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93 | } |
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94 | |
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95 | __sync_fetch_and_sub_4( &waiter_left, 1); |
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96 | } |
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97 | |
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98 | //---------------------------------------------------------------------------------------------------- |
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99 | // Waiter AC |
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100 | void main( WaiterAC* this ) { |
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101 | for( int i = 0; i < N; i++ ) { |
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102 | wait( &condAC , &globalA, &globalC ); |
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103 | } |
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104 | |
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105 | __sync_fetch_and_sub_4( &waiter_left, 1); |
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106 | } |
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107 | |
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108 | //---------------------------------------------------------------------------------------------------- |
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109 | // Waiter BC |
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110 | void main( WaiterBC* this ) { |
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111 | for( int i = 0; i < N; i++ ) { |
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112 | wait( &condBC , &globalB, &globalC ); |
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113 | } |
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114 | |
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115 | __sync_fetch_and_sub_4( &waiter_left, 1); |
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116 | } |
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117 | |
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118 | //---------------------------------------------------------------------------------------------------- |
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119 | // Main |
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120 | int main(int argc, char* argv[]) { |
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121 | waiter_left = 4; |
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122 | processor p[2]; |
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123 | sout | "Starting" | endl; |
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124 | { |
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125 | Signaler e; |
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126 | { |
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127 | WaiterABC a; |
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128 | WaiterAB b; |
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129 | WaiterBC c; |
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130 | WaiterAC d; |
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131 | } |
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132 | } |
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133 | sout | "Done" | endl; |
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134 | } |
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