| // |
| // shared_from_raw_test - based on shared_from_this_test |
| // |
| // Copyright (c) 2002, 2003, 2014 Peter Dimov |
| // |
| // 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 |
| // |
| |
| #include <boost/smart_ptr/enable_shared_from_raw.hpp> |
| #include <boost/shared_ptr.hpp> |
| |
| #include <boost/detail/lightweight_test.hpp> |
| |
| // |
| |
| class X |
| { |
| public: |
| |
| virtual void f() = 0; |
| |
| protected: |
| |
| ~X() {} |
| }; |
| |
| class Y |
| { |
| public: |
| |
| virtual boost::shared_ptr<X> getX() = 0; |
| |
| protected: |
| |
| ~Y() {} |
| }; |
| |
| boost::shared_ptr<Y> createY(); |
| |
| void test() |
| { |
| boost::shared_ptr<Y> py = createY(); |
| BOOST_TEST(py.get() != 0); |
| BOOST_TEST(py.use_count() == 1); |
| |
| try |
| { |
| boost::shared_ptr<X> px = py->getX(); |
| BOOST_TEST(px.get() != 0); |
| BOOST_TEST(py.use_count() == 2); |
| |
| px->f(); |
| |
| #if !defined( BOOST_NO_RTTI ) |
| boost::shared_ptr<Y> py2 = boost::dynamic_pointer_cast<Y>(px); |
| BOOST_TEST(py.get() == py2.get()); |
| BOOST_TEST(!(py < py2 || py2 < py)); |
| BOOST_TEST(py.use_count() == 3); |
| #endif |
| } |
| catch( boost::bad_weak_ptr const& ) |
| { |
| BOOST_ERROR( "py->getX() failed" ); |
| } |
| } |
| |
| void test2(); |
| void test3(); |
| |
| int main() |
| { |
| test(); |
| test2(); |
| test3(); |
| return boost::report_errors(); |
| } |
| |
| // virtual inheritance to stress the implementation |
| // (prevents Y* -> impl*, enable_shared_from_raw* -> impl* casts) |
| |
| class impl: public X, public virtual Y, public virtual boost::enable_shared_from_raw |
| { |
| public: |
| |
| virtual void f() |
| { |
| } |
| |
| virtual boost::shared_ptr<X> getX() |
| { |
| boost::shared_ptr<impl> pi = boost::shared_from_raw( this ); |
| BOOST_TEST( pi.get() == this ); |
| return pi; |
| } |
| }; |
| |
| // intermediate impl2 to stress the implementation |
| |
| class impl2: public impl |
| { |
| }; |
| |
| boost::shared_ptr<Y> createY() |
| { |
| boost::shared_ptr<Y> pi(new impl2); |
| return pi; |
| } |
| |
| void test2() |
| { |
| boost::shared_ptr<Y> pi(static_cast<impl2*>(0)); |
| } |
| |
| // |
| |
| struct V: public boost::enable_shared_from_raw |
| { |
| }; |
| |
| void test3() |
| { |
| boost::shared_ptr<V> p( new V ); |
| |
| try |
| { |
| boost::shared_ptr<V> q = boost::shared_from_raw( p.get() ); |
| BOOST_TEST( p == q ); |
| BOOST_TEST( !(p < q) && !(q < p) ); |
| } |
| catch( boost::bad_weak_ptr const & ) |
| { |
| BOOST_ERROR( "shared_from_this( p.get() ) failed" ); |
| } |
| |
| V v2( *p ); |
| |
| try |
| { |
| // shared_from_raw differs from shared_from_this; |
| // it will not throw here and will create a shared_ptr |
| |
| boost::shared_ptr<V> r = boost::shared_from_raw( &v2 ); |
| |
| // check if the shared_ptr is correct and that it does |
| // not share ownership with p |
| |
| BOOST_TEST( r.get() == &v2 ); |
| BOOST_TEST( p != r ); |
| BOOST_TEST( (p < r) || (r < p) ); |
| } |
| catch( boost::bad_weak_ptr const & ) |
| { |
| BOOST_ERROR("shared_from_raw( &v2 ) failed"); |
| } |
| |
| try |
| { |
| *p = V(); |
| boost::shared_ptr<V> r = boost::shared_from_raw( p.get() ); |
| BOOST_TEST( p == r ); |
| BOOST_TEST( !(p < r) && !(r < p) ); |
| } |
| catch( boost::bad_weak_ptr const & ) |
| { |
| BOOST_ERROR("shared_from_raw( p.get() ) threw bad_weak_ptr after *p = V()"); |
| } |
| } |