[2c9ebab] | 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 N = 100_000; |
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| 8 | |
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| 9 | enum state_t { WAITED, SIGNAL, BARGE }; |
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| 10 | |
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| 11 | monitor global_t {}; |
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| 12 | |
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| 13 | monitor global_data_t { |
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| 14 | state_t state; |
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| 15 | bool ran; |
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| 16 | }; |
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| 17 | |
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| 18 | void ?{} ( global_data_t * this ) { |
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| 19 | this->state = BARGE; |
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| 20 | } |
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| 21 | |
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| 22 | void ^?{} ( global_data_t * this ) {} |
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| 23 | |
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| 24 | global_data_t globalA, globalB; |
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| 25 | |
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| 26 | condition cond; |
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| 27 | |
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| 28 | volatile bool done; |
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| 29 | |
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| 30 | //------------------------------------------------------------------------------ |
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| 31 | void wait_op( global_data_t * mutex a, global_data_t * mutex b, unsigned i ) { |
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| 32 | wait( &cond ); |
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| 33 | a->ran = b->ran = true; |
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| 34 | |
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| 35 | yield( ((unsigned)rand48()) % 10 ); |
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| 36 | |
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| 37 | if(a->state != SIGNAL || b->state != SIGNAL) { |
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| 38 | sout | "ERROR Barging detected" | a->state | b->state | endl; |
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| 39 | abort(); |
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| 40 | } |
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| 41 | |
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| 42 | a->state = b->state = WAITED; |
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| 43 | |
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| 44 | yield( ((unsigned)rand48()) % 10 ); |
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| 45 | } |
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| 46 | |
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| 47 | thread Waiter {}; |
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| 48 | void main( Waiter* this ) { |
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| 49 | for( int i = 0; i < N; i++ ) { |
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| 50 | wait_op( &globalA, &globalB, i ); |
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| 51 | } |
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| 52 | } |
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| 53 | |
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| 54 | //------------------------------------------------------------------------------ |
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| 55 | void signal_op( global_data_t * mutex a, global_data_t * mutex b ) { |
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| 56 | yield( ((unsigned)rand48()) % 10 ); |
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| 57 | |
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| 58 | a->ran = b->ran = false; |
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| 59 | a->state = b->state = SIGNAL; |
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| 60 | |
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| 61 | signal_block( &cond ); |
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| 62 | |
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| 63 | yield( ((unsigned)rand48()) % 10 ); |
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| 64 | |
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| 65 | assert(a->ran == b->ran); |
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| 66 | if(a->ran) |
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| 67 | { |
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| 68 | if(a->state != WAITED || b->state != WAITED) { |
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| 69 | sout | "ERROR Barging detected" | a->state | b->state | endl; |
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| 70 | abort(); |
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| 71 | } |
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| 72 | } |
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| 73 | |
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| 74 | } |
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| 75 | |
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| 76 | thread Signaller {}; |
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| 77 | void main( Signaller* this ) { |
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| 78 | while( !done ) { |
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| 79 | signal_op( &globalA, &globalB ); |
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| 80 | } |
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| 81 | } |
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| 82 | |
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| 83 | //------------------------------------------------------------------------------ |
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| 84 | void barge_op( global_data_t * mutex a ) { |
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| 85 | a->state = BARGE; |
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| 86 | } |
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| 87 | |
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| 88 | thread Barger {}; |
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| 89 | void main( Barger* this ) { |
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| 90 | for( unsigned i = 0; !done; i++ ) { |
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| 91 | //Choose some monitor to barge into with some irregular pattern |
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| 92 | bool choose_a = (i % 13) > (i % 17); |
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| 93 | barge_op( choose_a ? &globalA : &globalB ); |
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| 94 | } |
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| 95 | } |
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| 96 | |
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| 97 | //------------------------------------------------------------------------------ |
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| 98 | |
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| 99 | int main(int argc, char* argv[]) { |
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| 100 | rand48seed(0); |
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| 101 | done = false; |
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| 102 | processor p; |
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| 103 | { |
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| 104 | Signaller s[4]; |
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| 105 | Barger b[13]; |
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| 106 | sout | "Starting waiters" | endl; |
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| 107 | { |
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| 108 | Waiter w[3]; |
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| 109 | } |
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| 110 | sout | "Waiters done" | endl; |
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| 111 | done = true; |
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| 112 | } |
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| 113 | } |
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