[709e0e0] | 1 | #include <cassert> |
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| 2 | #include <cstdlib> |
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| 3 | #include <iostream> |
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| 4 | #include <experimental/coroutine> |
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| 5 | #include <unistd.h> |
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| 6 | |
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| 7 | int random(int max) { |
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| 8 | return std::rand() % max; |
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| 9 | } |
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| 10 | |
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| 11 | struct Prod; |
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| 12 | struct Cons; |
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| 13 | |
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| 14 | struct Prod { |
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| 15 | struct local { |
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| 16 | Cons * c; |
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| 17 | int N, money, receipt; |
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| 18 | }; |
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| 19 | |
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| 20 | struct promise_type { |
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| 21 | local _l; |
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| 22 | |
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| 23 | Prod get_return_object() { |
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| 24 | return Prod(std::experimental::coroutine_handle<promise_type>::from_promise(*this)); |
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| 25 | } |
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| 26 | |
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| 27 | auto initial_suspend() { return std::experimental::suspend_never(); } |
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| 28 | auto final_suspend() { return std::experimental::suspend_always(); } |
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| 29 | |
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| 30 | void return_void() {} |
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| 31 | void unhandled_exception() {} |
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| 32 | }; |
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| 33 | |
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| 34 | struct data { |
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| 35 | promise_type * _promise = nullptr; |
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| 36 | bool await_ready() noexcept { return false; } |
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| 37 | void await_suspend(std::experimental::coroutine_handle<promise_type> _coroutine) noexcept { |
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| 38 | _promise = &_coroutine.promise(); |
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| 39 | } |
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| 40 | local & await_resume() noexcept { assert(_promise); return _promise->_l; } |
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| 41 | }; |
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| 42 | |
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| 43 | std::experimental::coroutine_handle<promise_type> _coroutine = nullptr; |
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| 44 | |
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| 45 | explicit Prod(std::experimental::coroutine_handle<promise_type> coroutine) |
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| 46 | : _coroutine(coroutine) |
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| 47 | {} |
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| 48 | |
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| 49 | ~Prod() { |
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| 50 | if(_coroutine) { _coroutine.destroy(); } |
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| 51 | } |
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| 52 | |
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| 53 | Prod() = default; |
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| 54 | Prod(Prod const &) = delete; |
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| 55 | Prod& operator=(Prod const &) = delete; |
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| 56 | |
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| 57 | Prod(Prod&& other) { |
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| 58 | std::swap(_coroutine, other._coroutine); |
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| 59 | } |
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| 60 | |
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| 61 | Prod& operator=(Prod&& other) { |
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| 62 | if(&other != this) { |
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| 63 | _coroutine = other._coroutine; |
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| 64 | other._coroutine = nullptr; |
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| 65 | } |
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| 66 | return *this; |
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| 67 | } |
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| 68 | |
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| 69 | static Prod main(); |
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| 70 | |
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| 71 | auto payment(int money) { |
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| 72 | _coroutine.promise()._l.money = money; |
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| 73 | struct ret { |
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| 74 | int _receipt; |
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| 75 | bool await_ready() { return false; } |
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| 76 | void await_suspend(std::experimental::coroutine_handle<>) {} |
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| 77 | int await_resume() { return _receipt; } |
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| 78 | }; |
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| 79 | return ret{ _coroutine.promise()._l.receipt }; |
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| 80 | } |
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| 81 | |
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| 82 | auto start(int N, Cons & c) { |
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| 83 | _coroutine.promise()._l.c = &c; |
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| 84 | _coroutine.promise()._l.N = N; |
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| 85 | _coroutine.promise()._l.receipt = 0; |
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| 86 | _coroutine.resume(); |
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| 87 | } |
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| 88 | }; |
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| 89 | |
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| 90 | struct Cons { |
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| 91 | struct local { |
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| 92 | Prod * p; |
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| 93 | int p1, p2, status; |
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| 94 | bool done; |
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| 95 | }; |
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| 96 | |
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| 97 | struct promise_type { |
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| 98 | local _l; |
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| 99 | |
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| 100 | Cons get_return_object() { |
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| 101 | return Cons(std::experimental::coroutine_handle<promise_type>::from_promise(*this)); |
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| 102 | } |
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| 103 | |
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| 104 | auto initial_suspend() { return std::experimental::suspend_never(); } |
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| 105 | auto final_suspend() { return std::experimental::suspend_always(); } |
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| 106 | |
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| 107 | void return_void() {} |
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| 108 | void unhandled_exception() {} |
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| 109 | }; |
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| 110 | |
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| 111 | struct data { |
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| 112 | Prod * _p; |
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| 113 | data(Prod & prod) : _p(&prod) {} |
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| 114 | promise_type * _promise = nullptr; |
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| 115 | bool await_ready() noexcept { return false; } |
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| 116 | void await_suspend(std::experimental::coroutine_handle<promise_type> _coroutine) noexcept { |
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| 117 | _promise = &_coroutine.promise(); |
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| 118 | } |
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| 119 | local & await_resume() noexcept { assert(_promise); _promise->_l.p = _p; return _promise->_l; } |
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| 120 | }; |
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| 121 | |
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| 122 | std::experimental::coroutine_handle<promise_type> _coroutine = nullptr; |
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| 123 | |
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| 124 | explicit Cons(std::experimental::coroutine_handle<promise_type> coroutine) |
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| 125 | : _coroutine(coroutine) |
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| 126 | {} |
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| 127 | |
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| 128 | ~Cons() { |
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| 129 | if(_coroutine) { _coroutine.destroy(); } |
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| 130 | } |
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| 131 | |
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| 132 | Cons() = default; |
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| 133 | Cons(Cons const &) = delete; |
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| 134 | Cons& operator=(Cons const &) = delete; |
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| 135 | |
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| 136 | Cons(Cons&& other) { |
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| 137 | std::swap(_coroutine, other._coroutine); |
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| 138 | } |
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| 139 | |
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| 140 | Cons& operator=(Cons&& other) { |
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| 141 | if(&other != this) { |
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| 142 | _coroutine = other._coroutine; |
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| 143 | other._coroutine = nullptr; |
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| 144 | } |
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| 145 | return *this; |
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| 146 | } |
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| 147 | |
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| 148 | static Cons main( Prod & prod ); |
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| 149 | |
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| 150 | auto deliver(int p1, int p2) { |
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| 151 | _coroutine.promise()._l.p1 = p1; |
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| 152 | _coroutine.promise()._l.p2 = p2; |
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| 153 | |
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| 154 | struct ret { |
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| 155 | int _status; |
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| 156 | bool await_ready() { return false; } |
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| 157 | void await_suspend(std::experimental::coroutine_handle<>) {} |
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| 158 | int await_resume() { return _status; } |
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| 159 | }; |
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| 160 | return ret{ _coroutine.promise()._l.status }; |
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| 161 | } |
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| 162 | |
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| 163 | auto stop() { |
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| 164 | _coroutine.promise()._l.done = true; |
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| 165 | struct ret { |
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| 166 | bool await_ready() { return false; } |
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| 167 | void await_suspend(std::experimental::coroutine_handle<>) {} |
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| 168 | void await_resume() {} |
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| 169 | }; |
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| 170 | return ret{}; |
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| 171 | } |
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| 172 | }; |
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| 173 | |
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| 174 | Prod Prod::main() { |
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| 175 | auto & p = co_await Prod::data(); |
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| 176 | for(int i = 0; i < p.N; i++) { |
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| 177 | int p1 = random(100), p2 = random(100); |
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| 178 | std::cout << p1 << " " << p2; |
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| 179 | int status = co_await p.c->deliver(p1, p2); |
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| 180 | std::cout << " $" << p.money << std::endl << status; |
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| 181 | p.receipt += 1; |
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| 182 | } |
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| 183 | co_await p.c->stop(); |
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| 184 | std::cout << "prod stops"; |
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| 185 | } |
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| 186 | |
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| 187 | Cons Cons::main( Prod & prod ) { |
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| 188 | auto & c = co_await Cons::data( prod ); |
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| 189 | int money = 1, receipt; |
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| 190 | for(;!c.done ;) { |
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| 191 | std::cout << c.p1 << " " << c.p2 << std::endl << " $" << money; |
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| 192 | c.status += 1; |
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| 193 | receipt = co_await c.p->payment( money ); |
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| 194 | std::cout << " #" << receipt; |
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| 195 | money += 1; |
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| 196 | } |
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| 197 | std::cout << "const stops"; |
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| 198 | } |
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| 199 | |
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| 200 | int main() { |
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| 201 | auto prod = Prod::main(); |
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| 202 | auto cons = Cons::main( prod ); |
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| 203 | srandom( getpid() ); |
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| 204 | prod.start(5, cons); |
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| 205 | } |
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