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// **********************************************************************
//
// Copyright (c) 2003
// ZeroC, Inc.
// Billerica, MA, USA
//
// All Rights Reserved.
//
// Ice is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation.
//
// **********************************************************************
#ifndef ICE_UTIL_OBJECTBASE_H
#define ICE_UTIL_OBJECTBASE_H
#include <IceUtil/StaticRecMutex.h>
#include <set>
namespace IceUtil
{
extern ICE_UTIL_API StaticRecMutex gcMutex;
class GC;
class ObjectBase;
typedef std::set<ObjectBase*> ObjectSet;
extern ICE_UTIL_API ObjectSet objects; // Set of pointers to all existing classes.
typedef std::multiset<ObjectBase*> ObjectMultiSet;
class ICE_UTIL_API ObjectBase : public noncopyable
{
public:
ObjectBase();
virtual ~ObjectBase();
void __incRef();
void __decRef();
int __getRef() const;
void __setNoDelete(bool);
void __decRefUnsafe();
protected:
static void __addObject(ObjectMultiSet&, ObjectBase*);
virtual void __gcReachable(ObjectMultiSet&) const = 0;
virtual void __gcClear() = 0;
private:
int _ref;
bool _noDelete;
bool _adopted;
friend class IceUtil::GC;
};
inline
ObjectBase::ObjectBase()
{
gcMutex.lock();
_ref = 0;
_noDelete = false;
_adopted = false;
gcMutex.unlock();
}
inline
ObjectBase::~ObjectBase()
{
gcMutex.lock();
ObjectSet::size_type num = objects.erase(this);
assert(num == 1);
gcMutex.unlock();
}
inline void
ObjectBase::__incRef()
{
gcMutex.lock();
assert(_ref >= 0);
if(!_adopted && _ref == 0)
{
_adopted = true;
std::pair<ObjectSet::iterator, bool> rc = objects.insert(this);
assert(rc.second);
}
++_ref;
gcMutex.unlock();
}
inline void
ObjectBase::__decRef()
{
gcMutex.lock();
bool doDelete = false;
assert(_ref > 0);
if(--_ref == 0)
{
doDelete = !_noDelete;
_noDelete = true;
}
if(doDelete)
{
delete this;
}
gcMutex.unlock();
}
inline int
ObjectBase::__getRef() const
{
gcMutex.lock();
int ref = _ref;
gcMutex.unlock();
return ref;
}
inline void
ObjectBase::__setNoDelete(bool b)
{
gcMutex.lock();
_noDelete = b;
gcMutex.unlock();
}
inline void
ObjectBase::__decRefUnsafe()
{
--_ref;
}
inline void
ObjectBase::__addObject(ObjectMultiSet& c, ObjectBase* p)
{
gcMutex.lock();
if(p)
{
c.insert(p);
}
gcMutex.unlock();
}
}
#endif
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