mirror of https://github.com/KLayout/klayout.git
125 lines
2.6 KiB
C++
125 lines
2.6 KiB
C++
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/*
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KLayout Layout Viewer
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Copyright (C) 2006-2017 Matthias Koefferlein
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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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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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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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef HDR_tlStaticObjects
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#define HDR_tlStaticObjects
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#include "tlCommon.h"
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#include <vector>
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namespace tl
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{
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/**
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* @brief A helper class for registered objects
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*/
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class StaticObjectReferenceBase
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{
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public:
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virtual ~StaticObjectReferenceBase () { };
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virtual void clear() = 0;
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};
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/**
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* @brief A helper template for a specific class
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*/
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template <class X>
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class StaticObjectReference : public StaticObjectReferenceBase
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{
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public:
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StaticObjectReference (X **x)
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: mp_x (x)
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{
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// .. nothing yet ..
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}
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~StaticObjectReference ()
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{
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clear ();
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}
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void clear()
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{
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if (mp_x) {
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delete *mp_x;
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*mp_x = 0;
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}
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mp_x = 0;
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}
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private:
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X **mp_x;
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};
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/**
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* @brief Provides a registration facility for late-created static objects
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*
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* The basic purpose of this facility is to provide a way to clean up those
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* objects without having to rely on some destructors being called from the
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* exit handler. It registers locations where objects are stored and will
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* release the stored objects and reset their pointer to 0.
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*/
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struct TL_PUBLIC StaticObjects
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{
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/**
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* @brief Destructor
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*/
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~StaticObjects ();
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/**
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* @brief Register a static object
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*
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* After registration, the object behind the location is automatically deleted on the static destructor.
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*/
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template <class X>
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static void reg (X **x)
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{
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ms_instance.register_object_base (new StaticObjectReference<X> (x));
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}
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/**
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* @brief Clean up all registered static objects
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*
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* Caution: if cleanup is not called, the stored objects are never deleted!
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*/
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static void cleanup ()
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{
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ms_instance.do_cleanup ();
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}
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protected:
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std::vector<StaticObjectReferenceBase *> m_objects;
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static StaticObjects ms_instance;
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void do_cleanup ();
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void register_object_base (StaticObjectReferenceBase *o);
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};
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}
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#endif
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