boost/libs/smart_ptr/test/make_shared_array_noinit_test.cpp

/*
 * Copyright (c) 2012-2014 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/make_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() {
        instances++;
    }

    ~type() {
        instances--;
    }

private:
    type(const type&);
    type& operator=(const type&);
};

unsigned int type::instances = 0;

int main() {
    {
        boost::shared_ptr<int[]> a1 = boost::make_shared_noinit<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::shared_ptr<int[3]> a1 = boost::make_shared_noinit<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::shared_ptr<int[][2]> a1 = boost::make_shared_noinit<int[][2]>(2);
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
    }

    {
        boost::shared_ptr<int[2][2]> a1 = boost::make_shared_noinit<int[2][2]>();
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
    }

    {
        boost::shared_ptr<const int[]> a1 = boost::make_shared_noinit<const 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::shared_ptr<const int[3]> a1 = boost::make_shared_noinit<const 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::shared_ptr<const int[][2]> a1 = boost::make_shared_noinit<const int[][2]>(2);
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
    }

    {
        boost::shared_ptr<const int[2][2]> a1 = boost::make_shared_noinit<const int[2][2]>();
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[]> a1 = boost::make_shared_noinit<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<type[3]> a1 = boost::make_shared_noinit<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[3]> w1 = a1;
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[][2]> a1 = boost::make_shared_noinit<type[][2]>(2);
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(type::instances == 4);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<type[2][2]> a1 = boost::make_shared_noinit<type[2][2]>();
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(type::instances == 4);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[]> a1 = boost::make_shared_noinit<const 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);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[3]> a1 = boost::make_shared_noinit<const 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);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[][2]> a1 = boost::make_shared_noinit<const type[][2]>(2);
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(type::instances == 4);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }

    BOOST_TEST(type::instances == 0);
    {
        boost::shared_ptr<const type[2][2]> a1 = boost::make_shared_noinit<const type[2][2]>();
        BOOST_TEST(a1.get() != 0);
        BOOST_TEST(a1.use_count() == 1);
        BOOST_TEST(type::instances == 4);
        a1.reset();
        BOOST_TEST(type::instances == 0);
    }

    return boost::report_errors();
}