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/* Used in Boost.MultiIndex tests.
*
* Copyright 2003-2020 Joaquin M Lopez Munoz.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* See http://www.boost.org/libs/multi_index for library home page.
*/
#ifndef BOOST_MULTI_INDEX_TEST_COUNT_ALLOCATOR_HPP
#define BOOST_MULTI_INDEX_TEST_COUNT_ALLOCATOR_HPP
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <memory>
template<typename T>
struct count_allocator:std::allocator<T>
{
typedef std::allocator<T> super;
template<class U>
struct rebind{typedef count_allocator<U> other;};
count_allocator(std::size_t& element_count,std::size_t& allocator_count):
pelement_count(&element_count),pallocator_count(&allocator_count)
{++(*pallocator_count);}
count_allocator(const count_allocator<T>& x):
super(x),
pelement_count(x.pelement_count),pallocator_count(x.pallocator_count)
{++(*pallocator_count);}
template<class U>count_allocator(const count_allocator<U>& x):
super(x),
pelement_count(x.pelement_count),pallocator_count(x.pallocator_count)
{++(*pallocator_count);}
~count_allocator()
{--(*pallocator_count);}
count_allocator& operator=(const count_allocator<T>& x)
{
pelement_count=x.pelement_count;
pallocator_count=x.pallocator_count;
return *this;
}
T* allocate(std::size_t n)
{
*pelement_count+=n;
return super::allocate(n);
}
void deallocate(T* p,std::size_t n)
{
super::deallocate(p,n);
*pelement_count-=n;
}
std::size_t* pelement_count;
std::size_t* pallocator_count;
};
#endif
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