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/*
*
* Copyright (C) 2008-2011 Adam <Adam@anope.org>
* Copyright (C) 2008-2012 Anope Team <team@anope.org>
*
* Please read COPYING and README for further details.
*/
#ifndef BASE_H
#define BASE_H
#include "services.h"
/** The base class that most classes in Anope inherit from
*/
class CoreExport Base
{
/* References to this base class */
std::set<dynamic_reference_base *> References;
public:
Base();
virtual ~Base();
void AddReference(dynamic_reference_base *r);
void DelReference(dynamic_reference_base *r);
};
class dynamic_reference_base
{
protected:
bool invalid;
public:
dynamic_reference_base() : invalid(false) { }
dynamic_reference_base(const dynamic_reference_base &other) : invalid(other.invalid) { }
virtual ~dynamic_reference_base() { }
inline void Invalidate() { this->invalid = true; }
};
template<typename T>
class dynamic_reference : public dynamic_reference_base
{
protected:
T *ref;
public:
dynamic_reference() : ref(NULL)
{
}
dynamic_reference(T *obj) : ref(obj)
{
if (ref)
ref->AddReference(this);
}
dynamic_reference(const dynamic_reference<T> &other) : dynamic_reference_base(other), ref(other.ref)
{
if (operator bool())
ref->AddReference(this);
}
virtual ~dynamic_reference()
{
if (operator bool())
ref->DelReference(this);
}
/* We explicitly call operator bool here in several places to prevent other
* operators, such operator T*, from being called instead, which will mess
* with any class inheriting from this that overloads this operator.
*/
virtual operator bool()
{
if (!this->invalid)
return this->ref != NULL;
return false;
}
inline operator T*()
{
if (operator bool())
return this->ref;
return NULL;
}
inline T* operator->()
{
if (operator bool())
return this->ref;
return NULL;
}
inline T* operator*()
{
if (operator bool())
return this->ref;
return NULL;
}
inline void operator=(T *newref)
{
if (operator bool())
this->ref->DelReference(this);
this->ref = newref;
this->invalid = false;
if (operator bool())
this->ref->AddReference(this);
}
inline bool operator<(const dynamic_reference<T> &other) const
{
return this < &other;
}
inline bool operator==(const dynamic_reference<T> &other)
{
if (!this->invalid)
return this->ref == other;
return false;
}
};
#endif // BASE_H
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