boost_smart_ptr/test/allocate_shared_array_test.cpp

/*
 * Copyright (c) 2012 Glen Joseph Fernandes 
 * glenfe at live dot com
 *
 * Distributed under the Boost Software License, 
 * Version 1.0. (See accompanying file LICENSE_1_0.txt 
 * or copy at http://boost.org/LICENSE_1_0.txt)
 */
#include <boost/detail/lightweight_test.hpp>
#include <boost/smart_ptr/allocate_shared_array.hpp>
#include <boost/smart_ptr/weak_ptr.hpp>
#include <boost/type_traits/alignment_of.hpp>

class type {
public:
    static unsigned int instances;
    explicit type(int = 0, int = 0)
        : member() {
        instances++;
    }
    ~type() {
        instances--;
    }
private:
    type(const type&);
    type& operator=(const type&);
    double member;
};

unsigned int type::instances = 0;

int main() {
    {
        boost::shared_ptr<int[]> a1 = boost::allocate_shared<int[]>(std::allocator<int>(), 3);
        int* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<int>::value == 0);
        BOOST_TEST(a1[0] == 0);
        BOOST_TEST(a1[1] == 0);
        BOOST_TEST(a1[2] == 0);
    }
    {
        boost::shared_ptr<const int[]> a1 = boost::allocate_shared<const int[]>(std::allocator<int>(), 3);
        const int* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<int>::value == 0);
        BOOST_TEST(a1[0] == 0);
        BOOST_TEST(a1[1] == 0);
        BOOST_TEST(a1[2] == 0);
    }
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[]> a1 = boost::allocate_shared<type[]>(std::allocator<type>(), 3);
        type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);
        BOOST_TEST(type::instances == 3);
        boost::weak_ptr<type[]> w1 = a1;
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[]> a1 = boost::allocate_shared<const type[]>(std::allocator<type>(), 3);
        const type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);
        BOOST_TEST(type::instances == 3);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
#if defined(BOOST_HAS_VARIADIC_TMPL) && defined(BOOST_HAS_RVALUE_REFS)
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[]> a1 = boost::allocate_shared<type[]>(std::allocator<type>(), 3, 1, 5);
        type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);        
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);        
        BOOST_TEST(type::instances == 3);
        boost::weak_ptr<type[]> w1 = a1;
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[3]> a1 = boost::allocate_shared<type[3]>(std::allocator<type>(), 1, 5);
        type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);        
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);
        BOOST_TEST(type::instances == 3);
        boost::weak_ptr<type[3]> w1 = a1;
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[]> a1 = boost::allocate_shared<const type[]>(std::allocator<type>(), 3, 1, 5);
        const type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);        
        BOOST_TEST(type::instances == 3);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[3]> a1 = boost::allocate_shared<const type[3]>(std::allocator<type>(), 1, 5);
        const type* a2 = a1.get();
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(a2 != 0);
        BOOST_TEST(size_t(a2) % boost::alignment_of<type>::value == 0);        
        BOOST_TEST(type::instances == 3);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }
#endif
    return boost::report_errors();
}