80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/*
|
|
ZOMBIE-CHECK.hpp - flatliner self-detection
|
|
|
|
Copyright (C) Lumiera.org
|
|
2018, Hermann Vosseler <Ichthyostega@web.de>
|
|
|
|
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 2 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, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
/** @file zombie-check.hpp
|
|
** Detector to set off alarm when (re)using deceased objects.
|
|
** When implementing services based on static fields or objects,
|
|
** an invocation after static shutdown can not be precluded -- be it by
|
|
** re-entrance, be through indirect reference to some dependency within a
|
|
** static function residing in another translation unit. Since typically the
|
|
** values in static storage are not overwritten after invoking the destructor,
|
|
** we may plant an automatic "zombie detector" to give a clear indication of
|
|
** such a policy violation (Lumiera forbids to use dependencies from dtors).
|
|
**
|
|
** @see sync-classlock.hpp
|
|
** @see depend.hpp
|
|
*/
|
|
|
|
|
|
#ifndef LIB_ZOMBIE_CHECK_H
|
|
#define LIB_ZOMBIE_CHECK_H
|
|
|
|
#include "lib/error.hpp"
|
|
|
|
|
|
|
|
namespace lib {
|
|
namespace error = lumiera::error;
|
|
|
|
|
|
/**
|
|
* Automatic lifecycle tracker, to produce an alarm when accessing objects after deletion.
|
|
*/
|
|
class ZombieCheck
|
|
{
|
|
bool deceased_ = false;
|
|
|
|
public:
|
|
ZombieCheck() = default;
|
|
~ZombieCheck()
|
|
{
|
|
deceased_ = true;
|
|
}
|
|
|
|
operator bool() const
|
|
{
|
|
return deceased_;
|
|
}
|
|
|
|
void
|
|
operator() () const
|
|
{
|
|
if (deceased_)
|
|
throw error::Fatal("Already deceased object called out of order during Application shutdown. "
|
|
"Lumiera Policy violated: Dependencies must not be used from destructors."
|
|
,error::LUMIERA_ERROR_LIFECYCLE);
|
|
}
|
|
};
|
|
|
|
|
|
} // namespace lib
|
|
#endif /*LIB_ZOMBIE_CHECK_H*/
|