/usr/include/xqilla/framework/ReferenceCounted.hpp is in libxqilla-dev 2.3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2001, 2008,
* DecisionSoft Limited. All rights reserved.
* Copyright (c) 2004, 2011,
* Oracle and/or its affiliates. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _REFERENCECOUNTED_HPP
#define _REFERENCECOUNTED_HPP
#include <xqilla/framework/XQillaExport.hpp>
#include <xercesc/framework/MemoryManager.hpp>
// for null RefCountPointer instances
#define NULLRCP ((void *)0)
/** Super class for reference counted classes */
class XQILLA_API ReferenceCounted
{
public:
ReferenceCounted()
: _ref_count(0) {}
virtual ~ReferenceCounted() {}
/// Increment the reference count
void incrementRefCount() const
{
++const_cast<unsigned int&>(_ref_count);
}
/// Decrement the reference count, deleting if it becomes zero
virtual void decrementRefCount() const
{
if(--const_cast<unsigned int&>(_ref_count) == 0) {
delete this;
}
}
unsigned int getRefCount() const
{
return _ref_count;
}
protected:
unsigned int _ref_count; // mutable
};
/** Super class of all the reference counted wrappers for Items */
template<class T> class RefCountPointer
{
public:
RefCountPointer(T *p = 0) : _p(p)
{
if(_p != 0) _p->incrementRefCount();
}
template<class T2> RefCountPointer(const RefCountPointer<T2> &o) : _p((T*)(T2*)o)
{
if(_p != 0) _p->incrementRefCount();
}
RefCountPointer(const RefCountPointer<T> &o) : _p(o._p)
{
if(_p != 0) _p->incrementRefCount();
}
RefCountPointer &operator=(const RefCountPointer<T> &o)
{
if(_p != o._p) {
if(_p != 0) _p->decrementRefCount();
_p = o._p;
if(_p != 0) _p->incrementRefCount();
}
return *this;
}
~RefCountPointer()
{
if(_p != 0) _p->decrementRefCount();
}
T *operator->() const
{
return _p;
}
operator T*() const
{
return _p;
}
T *get() const
{
return _p;
}
bool isNull() const
{
return (_p == 0);
}
bool notNull() const
{
return (_p != 0);
}
protected:
T *_p;
};
template<class T1, class T2>
inline bool operator==(const RefCountPointer<T1> &a, const RefCountPointer<T2> &b)
{
return (void*)(T1*)a == (void*)(T2*)b;
}
template<class T1, class T2>
inline bool operator!=(const RefCountPointer<T1> &a, const RefCountPointer<T2> &b)
{
return (void*)(T1*)a != (void*)(T2*)b;
}
template<class T>
inline bool operator==(const RefCountPointer<T> &a, void *b)
{
return (T*)a == (T*)b;
}
template<class T>
inline bool operator!=(const RefCountPointer<T> &a, void *b)
{
return (T*)a != (T*)b;
}
#endif
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