1 | #include <fstream> |
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2 | #include <kernel> |
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3 | #include <monitor> |
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4 | #include <thread> |
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5 | |
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6 | #include <time.h> |
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7 | |
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8 | static const unsigned long N = 10_000ul; |
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9 | |
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10 | #ifndef PREEMPTION_RATE |
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11 | #define PREEMPTION_RATE 10_000ul |
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12 | #endif |
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13 | |
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14 | unsigned int default_preemption() { |
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15 | return PREEMPTION_RATE; |
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16 | } |
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17 | |
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18 | enum state_t { WAIT, SIGNAL, BARGE }; |
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19 | |
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20 | monitor global_t {}; |
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21 | global_t mut; |
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22 | |
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23 | monitor global_data_t; |
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24 | void ?{}( global_data_t * this ); |
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25 | void ^?{} ( global_data_t * this ); |
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26 | |
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27 | monitor global_data_t { |
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28 | int counter; |
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29 | state_t state; |
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30 | } data; |
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31 | |
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32 | condition cond; |
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33 | |
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34 | volatile bool all_done; |
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35 | |
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36 | void ?{}( global_data_t * this ) { |
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37 | this->counter == 0; |
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38 | this->state = BARGE; |
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39 | } |
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40 | |
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41 | void ^?{} ( global_data_t * this ) {} |
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42 | |
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43 | //------------------------------------------------------------------------------ |
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44 | // Barging logic |
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45 | void barge( global_data_t * mutex d ) { |
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46 | d->state = BARGE; |
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47 | } |
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48 | |
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49 | thread Barger {}; |
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50 | |
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51 | void main( Barger * this ) { |
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52 | while( !all_done ) { |
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53 | barge( &data ); |
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54 | yield(); |
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55 | } |
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56 | } |
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57 | |
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58 | //------------------------------------------------------------------------------ |
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59 | // Waiting logic |
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60 | bool wait( global_t * mutex m, global_data_t * mutex d ) { |
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61 | wait( &cond ); |
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62 | if( d->state != SIGNAL ) { |
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63 | sout | "ERROR barging!" | endl; |
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64 | } |
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65 | |
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66 | d->counter++; |
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67 | |
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68 | if( (d->counter % 1000) == 0 ) sout | d->counter | endl; |
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69 | |
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70 | return d->counter < N; |
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71 | } |
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72 | |
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73 | thread Waiter {}; |
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74 | |
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75 | void main( Waiter * this ) { |
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76 | while( wait( &mut, &data ) ) { yield(); } |
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77 | } |
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78 | |
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79 | |
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80 | //------------------------------------------------------------------------------ |
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81 | // Signalling logic |
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82 | void signal( condition * cond, global_t * mutex a, global_data_t * mutex b ) { |
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83 | b->state = SIGNAL; |
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84 | signal( cond ); |
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85 | } |
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86 | |
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87 | void logic( global_t * mutex a ) { |
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88 | signal( &cond, a, &data ); |
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89 | |
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90 | yield( (unsigned)rand48() % 10 ); |
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91 | |
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92 | //This is technically a mutual exclusion violation but the mutex monitor protects us |
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93 | bool running = data.counter < N && data.counter > 0; |
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94 | if( data.state != SIGNAL && running ) { |
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95 | sout | "ERROR Eager signal" | data.state | endl; |
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96 | } |
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97 | } |
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98 | |
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99 | thread Signaller {}; |
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100 | |
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101 | void main( Signaller * this ) { |
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102 | while( !all_done ) { |
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103 | logic( &mut ); |
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104 | yield(); |
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105 | } |
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106 | } |
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107 | |
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108 | //------------------------------------------------------------------------------ |
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109 | // Main loop |
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110 | int main(int argc, char* argv[]) { |
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111 | rand48seed( time( NULL ) ); |
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112 | all_done = false; |
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113 | processor p; |
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114 | { |
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115 | Signaller s; |
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116 | Barger b[17]; |
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117 | { |
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118 | Waiter w[4]; |
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119 | } |
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120 | sout | "All waiter done" | endl; |
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121 | all_done = true; |
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122 | } |
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123 | } |
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