/****************************************************************************
*
* (c) 2017 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
*
* QGroundControl is licensed according to the terms in the file
* COPYING.md in the root of the source code directory.
*
****************************************************************************/
#pragma once
#include <memory>
//-----------------------------------------------------------------------------
/**
* @class LifetimeChecker
* Base class which helps to check if an object instance still exists.
* A subclass can take a weak pointer from _instance and then check if the object was deleted.
* This is used in callbacks that access 'this', but the instance might already be deleted (e.g. vehicle disconnect).
*/
class LifetimeChecker
{
public:
LifetimeChecker() : _instance(this, [](void*){}) { }
virtual ~LifetimeChecker() = default;
protected:
std::shared_ptr<LifetimeChecker> _instance;
};
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Gus Grubba authored5c9a3ca8