83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
#pragma once
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#include <list>
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#include <iostream>
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#include <functional>
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#include "util/Types.h"
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class CallbackRef {
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public:
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CallbackRef() = default;
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explicit CallbackRef(std::function<void()> unbind): unbind(std::make_shared<std::function<void()>>(unbind)) {};
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~CallbackRef() { if (unbind && unbind.unique()) unbind->operator()(); }
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private:
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sptr<std::function<void()>> unbind = nullptr;
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};
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template <typename... Args>
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class CallbackManager {
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public:
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typedef std::function<void(Args...)> CB_TYPE;
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void update() {
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while (invalidInds.size()) {
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callbacks.remove(invalidInds.front());
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invalidInds.pop_front();
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}
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};
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void call(const Args&... args) {
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for (const let& cb : callbacks) if (cb.second.valid) cb.second.call(args...);
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};
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CallbackRef bind(const CB_TYPE& cb) {
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usize cID = next++;
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callbacks.emplace(cID, InvalidatableCB(cb));
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return CallbackRef([cID, this]() { unbind(cID); });
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};
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void unbind(usize ind) {
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callbacks.at(ind).valid = false;
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};
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private:
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struct InvalidatableCB {
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InvalidatableCB(const CB_TYPE& cb): call(cb) {};
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CB_TYPE call;
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bool valid = true;
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};
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usize next = 0;
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std::list<usize> invalidInds;
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std::unordered_map<usize, InvalidatableCB> callbacks;
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};
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template <typename E, typename... Args>
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class CallbackGroup {
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public:
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typedef E CB_IDENTIFIER;
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typedef std::function<void(Args...)> CB_TYPE;
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void update() {
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for (usize i = 0; i < callbacks.size(); i++) callbacks[i].update();
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};
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void call(CB_IDENTIFIER type, const Args&... args) {
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callbacks[static_cast<usize>(type)].call(args...);
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};
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CallbackRef bind(CB_IDENTIFIER type, const CB_TYPE& cb) {
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return callbacks[static_cast<usize>(type)].bind(cb);
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};
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void unbind(CB_IDENTIFIER type, usize ind) {
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callbacks[static_cast<usize>(type)].unbind(ind);
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};
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private:
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array<CallbackManager<Args...>, static_cast<usize>(E::_END)> callbacks;
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};
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