forked from boostorg/smart_ptr
95 lines
2.0 KiB
C++
95 lines
2.0 KiB
C++
/*
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Copyright 2012-2015 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/core/lightweight_test.hpp>
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#include <boost/smart_ptr/enable_shared_from_this.hpp>
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#include <boost/smart_ptr/make_shared.hpp>
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template<class T = void>
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struct creator {
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typedef T value_type;
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template<class U>
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struct rebind {
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typedef creator<U> other;
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};
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creator() { }
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template<class U>
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creator(const creator<U>&) { }
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T* allocate(std::size_t size) {
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return static_cast<T*>(::operator new(sizeof(T) * size));
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}
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void deallocate(T* ptr, std::size_t) {
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::operator delete(ptr);
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}
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};
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template<class T, class U>
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inline bool
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operator==(const creator<T>&, const creator<U>&)
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{
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return true;
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}
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template<class T, class U>
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inline bool
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operator!=(const creator<T>&, const creator<U>&)
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{
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return false;
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}
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class type
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: public boost::enable_shared_from_this<type> {
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public:
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static unsigned instances;
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type() {
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++instances;
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}
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~type() {
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--instances;
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}
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private:
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type(const type&);
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type& operator=(const type&);
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};
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unsigned type::instances = 0;
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int main()
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{
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BOOST_TEST(type::instances == 0);
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{
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boost::shared_ptr<type[]> result =
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boost::allocate_shared<type[]>(creator<type>(), 3);
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try {
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result[0].shared_from_this();
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BOOST_ERROR("shared_from_this did not throw");
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} catch (...) {
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BOOST_TEST(type::instances == 3);
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}
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}
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BOOST_TEST(type::instances == 0);
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{
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boost::shared_ptr<type[]> result =
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boost::allocate_shared_noinit<type[]>(creator<>(), 3);
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try {
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result[0].shared_from_this();
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BOOST_ERROR("shared_from_this did not throw");
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} catch (...) {
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BOOST_TEST(type::instances == 3);
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}
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}
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return boost::report_errors();
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}
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