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/*
* Copyright © 2019 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3,
* as published by the Free Software Foundation.
*
* 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 <http://www.gnu.org/licenses/>.
*
* Authored by: Alan Griffiths <alan@octopull.co.uk>
*/
#ifndef WLCS_ACTIVE_LISTENERS_H
#define WLCS_ACTIVE_LISTENERS_H
#include <mutex>
#include <set>
namespace wlcs
{
class ActiveListeners
{
public:
void add(void* listener)
{
std::lock_guard<decltype(mutex)> lock{mutex};
listeners.insert(listener);
}
void del(void* listener)
{
std::lock_guard<decltype(mutex)> lock{mutex};
listeners.erase(listener);
}
bool includes(void* listener) const
{
std::lock_guard<decltype(mutex)> lock{mutex};
return listeners.find(listener) != end(listeners);
}
private:
std::mutex mutable mutex;
std::set<void*> listeners;
};
}
#endif //WLCS_ACTIVE_LISTENERS_H
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