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/******************************************************************************\
* Illustrates semantics of request().{then|await|receive}. *
\******************************************************************************/
#include <chrono>
#include <cstdint>
#include <iostream>
#include <vector>
#include "caf/all.hpp"
using std::endl;
using std::vector;
using std::chrono::seconds;
using namespace caf;
// --(rst-cell-begin)--
using cell
= typed_actor<result<void>(put_atom, int32_t), // 'put' writes to the cell
result<int32_t>(get_atom)>; // 'get 'reads from the cell
struct cell_state {
static constexpr inline const char* name = "cell";
cell::pointer self;
int32_t value;
cell_state(cell::pointer ptr, int32_t val) : self(ptr), value(val) {
// nop
}
cell_state(const cell_state&) = delete;
cell_state& operator=(const cell_state&) = delete;
cell::behavior_type make_behavior() {
return {
[=](put_atom, int32_t val) { value = val; },
[=](get_atom) { return value; },
};
}
};
using cell_impl = cell::stateful_impl<cell_state>;
// --(rst-cell-end)--
// --(rst-testees-begin)--
void waiting_testee(event_based_actor* self, vector<cell> cells) {
for (auto& x : cells)
self->request(x, seconds(1), get_atom_v).await([=](int32_t y) {
aout(self) << "cell #" << x.id() << " -> " << y << endl;
});
}
void multiplexed_testee(event_based_actor* self, vector<cell> cells) {
for (auto& x : cells)
self->request(x, seconds(1), get_atom_v).then([=](int32_t y) {
aout(self) << "cell #" << x.id() << " -> " << y << endl;
});
}
void blocking_testee(blocking_actor* self, vector<cell> cells) {
for (auto& x : cells)
self->request(x, seconds(1), get_atom_v)
.receive(
[&](int32_t y) {
aout(self) << "cell #" << x.id() << " -> " << y << endl;
},
[&](error& err) {
aout(self) << "cell #" << x.id() << " -> " << to_string(err) << endl;
});
}
// --(rst-testees-end)--
// --(rst-main-begin)--
void caf_main(actor_system& system) {
vector<cell> cells;
for (int32_t i = 0; i < 5; ++i)
cells.emplace_back(system.spawn<cell_impl>(i * i));
scoped_actor self{system};
aout(self) << "waiting_testee" << endl;
auto x1 = self->spawn(waiting_testee, cells);
self->wait_for(x1);
aout(self) << "multiplexed_testee" << endl;
auto x2 = self->spawn(multiplexed_testee, cells);
self->wait_for(x2);
aout(self) << "blocking_testee" << endl;
system.spawn(blocking_testee, cells);
}
// --(rst-main-end)--
CAF_MAIN()
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