-/*=============================================================================
- Copyright (c) 2007 Tobias Schwinger
-
- Use modification and distribution are subject to 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).
-==============================================================================*/
+/*
+Copyright 2007 Tobias Schwinger
+Copyright 2019 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
#include <boost/functional/factory.hpp>
#include <boost/core/lightweight_test.hpp>
+#include <boost/smart_ptr/shared_ptr.hpp>
-#include <cstddef>
-#include <memory>
-#include <boost/shared_ptr.hpp>
+class sum {
+public:
+ sum(int a, int b)
+ : value_(a + b) { }
-#ifdef BOOST_MSVC
-// none of the deprecated members of std::allocate are used here
-# pragma warning(disable:4996) // Various members of std::allocator are deprecated in C++17
-#endif
+ int get() const {
+ return value_;
+ }
-using std::size_t;
+private:
+ int value_;
+};
-class sum
-{
- int val_sum;
- public:
- sum(int a, int b) : val_sum(a + b) { }
+template<class T>
+class creator {
+public:
+ static int count;
- operator int() const { return this->val_sum; }
-};
+ typedef T value_type;
+ typedef T* pointer;
-template< typename T >
-class counting_allocator : public std::allocator<T>
-{
- public:
- counting_allocator()
- { }
+ template<class U>
+ struct rebind {
+ typedef creator<U> other;
+ };
- template< typename OtherT >
- struct rebind { typedef counting_allocator<OtherT> other; };
+ creator() { }
- template< typename OtherT >
- counting_allocator(counting_allocator<OtherT> const& that)
- { }
+ template<class U>
+ creator(const creator<U>&) { }
- static size_t n_allocated;
- T* allocate(size_t n, void const* hint = 0l)
- {
- n_allocated += 1;
- return std::allocator<T>::allocate(n,hint);
+ T* allocate(std::size_t size) {
+ ++count;
+ return static_cast<T*>(::operator new(sizeof(T) * size));
}
- static size_t n_deallocated;
- void deallocate(T* ptr, size_t n)
- {
- n_deallocated += 1;
- return std::allocator<T>::deallocate(ptr,n);
+ void deallocate(T* ptr, std::size_t) {
+ --count;
+ ::operator delete(ptr);
}
};
-template< typename T > size_t counting_allocator<T>::n_allocated = 0;
-template< typename T > size_t counting_allocator<T>::n_deallocated = 0;
+
+template<class T>
+int creator<T>::count = 0;
+
+template<class T, class U>
+inline bool
+operator==(const creator<T>&, const creator<U>&)
+{
+ return true;
+}
+
+template<class T, class U>
+inline bool
+operator!=(const creator<T>&, const creator<U>&)
+{
+ return false;
+}
int main()
{
- int one = 1, two = 2;
+ int a = 1;
+ int b = 2;
{
- boost::shared_ptr<sum> instance(
- boost::factory< boost::shared_ptr<sum>, counting_allocator<void>,
- boost::factory_alloc_for_pointee_and_deleter >()(one,two) );
- BOOST_TEST(*instance == 3);
+ boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
+ creator<void>,
+ boost::factory_alloc_for_pointee_and_deleter>()(a, b));
+ BOOST_TEST(creator<sum>::count == 1);
+ BOOST_TEST(s->get() == 3);
}
- BOOST_TEST(counting_allocator<sum>::n_allocated == 1);
- BOOST_TEST(counting_allocator<sum>::n_deallocated == 1);
+ BOOST_TEST(creator<sum>::count == 0);
{
- boost::shared_ptr<sum> instance(
- boost::factory< boost::shared_ptr<sum>, counting_allocator<void>,
- boost::factory_passes_alloc_to_smart_pointer >()(one,two) );
- BOOST_TEST(*instance == 3);
+ boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
+ creator<void>,
+ boost::factory_passes_alloc_to_smart_pointer>()(a, b));
+ BOOST_TEST(creator<sum>::count == 1);
+ BOOST_TEST(s->get() == 3);
}
- BOOST_TEST(counting_allocator<sum>::n_allocated == 2);
- BOOST_TEST(counting_allocator<sum>::n_deallocated == 2);
+ BOOST_TEST(creator<sum>::count == 0);
return boost::report_errors();
}