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/*
* Copyright (C) 1996-2025 The Squid Software Foundation and contributors
*
* Squid software is distributed under GPLv2+ license and includes
* contributions from numerous individuals and organizations.
* Please see the COPYING and CONTRIBUTORS files for details.
*/
#include "squid.h"
#include <iostream>
class CallCounter
{
public:
CallCounter();
void recordNew();
void recordDelete();
size_t news() const;
size_t deletes() const;
private:
size_t _news, _deletes;
};
CallCounter::CallCounter() : _news(0), _deletes(0) {}
void CallCounter::recordNew() { ++_news;}
void CallCounter::recordDelete() { ++_deletes;}
size_t CallCounter::news() const {return _news;}
size_t CallCounter::deletes() const {return _deletes;}
class BaseVirtual
{
public:
void *operator new (size_t);
void operator delete (void *);
virtual ~BaseVirtual();
static void DeleteABase(BaseVirtual *aBase);
static CallCounter Calls;
};
CallCounter BaseVirtual::Calls;
void *
BaseVirtual::operator new(size_t byteCount)
{
Calls.recordNew();
return ::operator new (byteCount);
}
void
BaseVirtual::operator delete(void *address)
{
Calls.recordDelete();
::operator delete (address);
}
void
BaseVirtual::DeleteABase(BaseVirtual *aBase)
{
delete aBase;
}
BaseVirtual::~BaseVirtual() {}
class ChildVirtual : public BaseVirtual
{
public:
void *operator new (size_t);
void operator delete (void *);
~ChildVirtual() override;
static CallCounter Calls;
};
CallCounter ChildVirtual::Calls;
void *
ChildVirtual::operator new(size_t byteCount)
{
Calls.recordNew();
return ::operator new (byteCount);
}
void
ChildVirtual::operator delete(void *address)
{
Calls.recordDelete();
::operator delete (address);
}
ChildVirtual::~ChildVirtual() {}
int
main(int, char *[])
{
assert (BaseVirtual::Calls.news() == 0);
assert (BaseVirtual::Calls.deletes() == 0);
assert (ChildVirtual::Calls.news() == 0);
assert (ChildVirtual::Calls.deletes() == 0);
BaseVirtual *aBase = new ChildVirtual;
assert (BaseVirtual::Calls.news() == 0);
assert (BaseVirtual::Calls.deletes() == 0);
assert (ChildVirtual::Calls.news() == 1);
assert (ChildVirtual::Calls.deletes() == 0);
BaseVirtual::DeleteABase(aBase);
assert (BaseVirtual::Calls.news() == 0);
assert (BaseVirtual::Calls.deletes() == 0);
assert (ChildVirtual::Calls.news() == 1);
assert (ChildVirtual::Calls.deletes() == 1);
// deleting nullptr works.
BaseVirtual::DeleteABase(nullptr);
assert (BaseVirtual::Calls.news() == 0);
assert (BaseVirtual::Calls.deletes() == 0);
assert (ChildVirtual::Calls.news() == 1);
assert (ChildVirtual::Calls.deletes() == 1);
return EXIT_SUCCESS;
}
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