dingusppc/core/coresignal.h

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2023-07-27 00:38:21 +00:00
/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** Poor man's signals & slots mechanism implementation. */
// Inspired by http://schneegans.github.io/tutorials/2015/09/20/signal-slot
#ifndef CORE_SIGNAL_H
#define CORE_SIGNAL_H
#include <functional>
#include <map>
template <typename... Args>
class CoreSignal {
public:
CoreSignal() = default;
~CoreSignal() = default;
// Connects a std::function type slot to the signal.
// The return value can be used to disconnect the slot.
int connect_func(std::function<void(Args...)> const& slot) const {
_slots.insert(std::make_pair(++_current_id, slot));
return _current_id;
}
// Connects a class method type slot to the signal.
// The return value can be used to disconnect the slot.
template <typename T>
int connect_method(T *inst, void (T::*func)(Args...)) {
return connect_func([=](Args... args) {
(inst->*func)(args...);
});
}
// Calls all connected slots.
void emit(Args... args) {
for (auto const& it : _slots) {
it.second(args...);
}
}
void disconnect(int id) {
_slots.erase(id);
}
void disconnect_all() {
_slots.clear();
}
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private:
mutable std::map<int, std::function<void(Args...)>> _slots;
mutable unsigned int _current_id { 0 };
};
#endif // CORE_SIGNAL_H