mirror of
https://github.com/Xaymar/obs-StreamFX
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29ab00633c
The util::event code suffers from the problem that it could call into a class that no longer exists, corrupting memory or even crashing. By tracking lifetime using std::weak_ptr<void> this can be avoided and the dead listeners can be automatically removed.
86 lines
1.8 KiB
C++
86 lines
1.8 KiB
C++
/*
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* Modern effects for a modern Streamer
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* Copyright (C) 2018 Michael Fabian Dirks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "utility-event.hpp"
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size_t utility::event::add(listener_t callback)
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{
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_listeners.push_back(callback);
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{
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arguments_t args;
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args.emplace("event", this);
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args.emplace("listener", &callback);
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on.add(args);
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}
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return _listeners.size();
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}
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size_t utility::event::remove(listener_t callback)
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{
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_listeners.remove(callback);
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{
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arguments_t args;
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args.emplace("event", this);
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args.emplace("listener", &callback);
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on.remove(args);
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}
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if (_listeners.empty()) {
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arguments_t args;
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args.emplace("event", this);
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on.empty(args);
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}
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return _listeners.size();
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}
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size_t utility::event::count()
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{
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return _listeners.size();
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}
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bool utility::event::empty()
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{
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return _listeners.empty();
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}
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void utility::event::clear()
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{
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return _listeners.clear();
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}
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size_t utility::event::call(arguments_t& arguments)
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{
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size_t idx = 0;
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for (auto const& listener : _listeners) {
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if (listener.second(listener.first, arguments)) {
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break;
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}
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idx++;
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}
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return idx;
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}
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size_t utility::event::operator()(arguments_t& arguments)
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{
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return call(arguments);
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}
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