mirror of
https://github.com/Icinga/icinga2.git
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151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (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 Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef OBJECT_H
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#define OBJECT_H
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namespace icinga
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{
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class SharedPtrHolder;
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/**
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* Base class for all heap-allocated objects. At least one of its methods
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* has to be virtual for RTTI to work.
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*
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* @ingroup base
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*/
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class I2_BASE_API Object : public enable_shared_from_this<Object>, public boost::signals::trackable
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{
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public:
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typedef shared_ptr<Object> Ptr;
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typedef weak_ptr<Object> WeakPtr;
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void Hold(void);
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static void ClearHeldObjects(void);
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/**
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* Holds a shared pointer and provides support for implicit upcasts.
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*
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* @ingroup base
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*/
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class SharedPtrHolder
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{
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public:
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/**
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* Constructor for the SharedPtrHolder class.
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*
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* @param object The shared pointer that should be used to
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* construct this shared pointer holder.
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*/
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explicit SharedPtrHolder(const Object::Ptr& object)
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: m_Object(object)
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{ }
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/**
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* Retrieves a shared pointer for the object that is associated
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* this holder instance.
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*
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* @returns A shared pointer.
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*/
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template<typename T>
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operator shared_ptr<T>(void) const
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{
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#ifdef _DEBUG
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shared_ptr<T> other = dynamic_pointer_cast<T>(m_Object);
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assert(other);
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#else /* _DEBUG */
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shared_ptr<T> other = static_pointer_cast<T>(m_Object);
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#endif /* _DEBUG */
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return other;
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}
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/**
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* Retrieves a weak pointer for the object that is associated
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* with this holder instance.
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*
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* @returns A weak pointer.
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*/
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template<typename T>
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operator weak_ptr<T>(void) const
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{
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return static_cast<shared_ptr<T> >(*this);
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}
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private:
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Object::Ptr m_Object; /**< The object that belongs to this
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holder instance */
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};
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SharedPtrHolder GetSelf(void);
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#ifdef _DEBUG
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static int GetAliveObjectsCount(void);
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static void PrintMemoryProfile(void);
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#endif /* _DEBUG */
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protected:
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Object(void);
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virtual ~Object(void);
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private:
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Object(const Object& other);
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Object& operator=(const Object& rhs);
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static boost::mutex& GetMutex(void);
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static set<Object *>& GetAliveObjects(void);
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static vector<Object::Ptr>& GetHeldObjects(void);
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};
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/**
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* Compares a weak pointer with a raw pointer.
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*
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* @ingroup base
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*/
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template<class T>
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struct WeakPtrEqual
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{
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private:
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const void *m_Ref; /**< The object. */
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public:
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/**
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* Constructor for the WeakPtrEqual class.
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*
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* @param ref The object that should be compared with the weak pointer.
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*/
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WeakPtrEqual(const void *ref) : m_Ref(ref) { }
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/**
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* Compares the two pointers.
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*
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* @param wref The weak pointer.
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* @returns true if the pointers point to the same object, false otherwise.
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*/
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bool operator()(const weak_ptr<T>& wref) const
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{
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return (wref.lock().get() == static_cast<const T *>(m_Ref));
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}
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};
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}
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#endif /* OBJECT_H */
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