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- /*
- Copyright 2012-2015 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/core/lightweight_test.hpp>
- #include <boost/smart_ptr/enable_shared_from_this.hpp>
- #include <boost/smart_ptr/make_shared.hpp>
- template<class T = void>
- struct creator {
- typedef T value_type;
- template<class U>
- struct rebind {
- typedef creator<U> other;
- };
- creator() { }
- template<class U>
- creator(const creator<U>&) { }
- T* allocate(std::size_t size) {
- return static_cast<T*>(::operator new(sizeof(T) * size));
- }
- void deallocate(T* ptr, std::size_t) {
- ::operator delete(ptr);
- }
- };
- 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;
- }
- class type
- : public boost::enable_shared_from_this<type> {
- public:
- static unsigned instances;
- type() {
- ++instances;
- }
- ~type() {
- --instances;
- }
- private:
- type(const type&);
- type& operator=(const type&);
- };
- unsigned type::instances = 0;
- int main()
- {
- BOOST_TEST(type::instances == 0);
- {
- boost::shared_ptr<type[]> result =
- boost::allocate_shared<type[]>(creator<type>(), 3);
- try {
- result[0].shared_from_this();
- BOOST_ERROR("shared_from_this did not throw");
- } catch (...) {
- BOOST_TEST(type::instances == 3);
- }
- }
- BOOST_TEST(type::instances == 0);
- {
- boost::shared_ptr<type[]> result =
- boost::allocate_shared_noinit<type[]>(creator<>(), 3);
- try {
- result[0].shared_from_this();
- BOOST_ERROR("shared_from_this did not throw");
- } catch (...) {
- BOOST_TEST(type::instances == 3);
- }
- }
- return boost::report_errors();
- }
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