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📄 shared_ptr_test.cpp

📁 boost库提供标准的C++ API 配合dev c++使用,功能更加强大
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};

struct Y: public A, public virtual X
{
    static long instances;

    Y()
    {
        ++instances;
    }

    ~Y()
    {
        --instances;
    }

private:

    Y(Y const &);
    Y & operator= (Y const &);
};

long Y::instances = 0;

void pointer_reset()
{
    {
        boost::shared_ptr<int> pi;

        pi.reset(static_cast<int*>(0));
        BOOST_TEST(pi? false: true);
        BOOST_TEST(!pi);
        BOOST_TEST(pi.get() == 0);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());

        int * p = new int;
        pi.reset(p);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == p);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());

        pi.reset(static_cast<int*>(0));
        BOOST_TEST(pi? false: true);
        BOOST_TEST(!pi);
        BOOST_TEST(pi.get() == 0);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());
    }

    {
        boost::shared_ptr<X> px;

        px.reset(static_cast<X*>(0));
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
        BOOST_TEST(X::instances == 0);

        X * p = new X;
        px.reset(p);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(px.get() == p);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
        BOOST_TEST(X::instances == 1);

        px.reset(static_cast<X*>(0));
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
        BOOST_TEST(X::instances == 0);
        BOOST_TEST(Y::instances == 0);

        Y * q = new Y;
        px.reset(q);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(px.get() == q);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
        BOOST_TEST(X::instances == 1);
        BOOST_TEST(Y::instances == 1);

        px.reset(static_cast<Y*>(0));
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
        BOOST_TEST(X::instances == 0);
        BOOST_TEST(Y::instances == 0);
    }

    {
        boost::shared_ptr<void> pv;

        pv.reset(static_cast<X*>(0));
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
        BOOST_TEST(X::instances == 0);

        X * p = new X;
        pv.reset(p);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == p);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
        BOOST_TEST(X::instances == 1);

        pv.reset(static_cast<X*>(0));
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
        BOOST_TEST(X::instances == 0);
        BOOST_TEST(Y::instances == 0);

        Y * q = new Y;
        pv.reset(q);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == q);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
        BOOST_TEST(X::instances == 1);
        BOOST_TEST(Y::instances == 1);

        pv.reset(static_cast<Y*>(0));
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
        BOOST_TEST(X::instances == 0);
        BOOST_TEST(Y::instances == 0);
    }
}

void * deleted = 0;

void deleter2(void * p)
{
    deleted = p;
}

void deleter_reset()
{
    {
        boost::shared_ptr<int> pi;

        pi.reset(static_cast<int*>(0), deleter2);
        BOOST_TEST(pi? false: true);
        BOOST_TEST(!pi);
        BOOST_TEST(pi.get() == 0);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());

        deleted = &pi;

        int m = 0;
        pi.reset(&m, deleter2);
        BOOST_TEST(deleted == 0);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == &m);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());

        pi.reset(static_cast<int*>(0), deleter2);
        BOOST_TEST(deleted == &m);
        BOOST_TEST(pi? false: true);
        BOOST_TEST(!pi);
        BOOST_TEST(pi.get() == 0);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());

        pi.reset();
        BOOST_TEST(deleted == 0);
    }

    {
        boost::shared_ptr<X> px;

        px.reset(static_cast<X*>(0), deleter2);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        deleted = &px;

        X x;
        px.reset(&x, deleter2);
        BOOST_TEST(deleted == 0);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(px.get() == &x);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        px.reset(static_cast<X*>(0), deleter2);
        BOOST_TEST(deleted == &x);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        Y y;
        px.reset(&y, deleter2);
        BOOST_TEST(deleted == 0);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(px.get() == &y);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        px.reset(static_cast<Y*>(0), deleter2);
        BOOST_TEST(deleted == &y);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        px.reset();
        BOOST_TEST(deleted == 0);
    }

    {
        boost::shared_ptr<void> pv;

        pv.reset(static_cast<X*>(0), deleter2);
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());

        deleted = &pv;

        X x;
        pv.reset(&x, deleter2);
        BOOST_TEST(deleted == 0);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == &x);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());

        pv.reset(static_cast<X*>(0), deleter2);
        BOOST_TEST(deleted == &x);
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());

        Y y;
        pv.reset(&y, deleter2);
        BOOST_TEST(deleted == 0);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == &y);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());

        pv.reset(static_cast<Y*>(0), deleter2);
        BOOST_TEST(deleted == &y);
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());

        pv.reset();
        BOOST_TEST(deleted == 0);
    }

    {
        boost::shared_ptr<incomplete> px;

        px.reset(p0, deleter2);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        deleted = &px;
        px.reset(p0, deleter2);
        BOOST_TEST(deleted == 0);
    }
}

void test()
{
    plain_reset();
    pointer_reset();
    deleter_reset();
}

} // namespace n_reset

namespace n_access
{

struct X
{
};

void test()
{
    {
        boost::shared_ptr<X> px;
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);

#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
        using boost::get_pointer;
#endif

        BOOST_TEST(get_pointer(px) == px.get());
    }

    {
        boost::shared_ptr<X> px(static_cast<X*>(0));
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);

#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
        using boost::get_pointer;
#endif

        BOOST_TEST(get_pointer(px) == px.get());
    }

    {
        boost::shared_ptr<X> px(static_cast<X*>(0), boost::checked_deleter<X>());
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);

#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
        using boost::get_pointer;
#endif

        BOOST_TEST(get_pointer(px) == px.get());
    }

    {
        X * p = new X;
        boost::shared_ptr<X> px(p);
        BOOST_TEST(px.get() == p);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(&*px == px.get());
        BOOST_TEST(px.operator ->() == px.get());

#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
        using boost::get_pointer;
#endif

        BOOST_TEST(get_pointer(px) == px.get());
    }

    {
        X * p = new X;
        boost::shared_ptr<X> px(p, boost::checked_deleter<X>());
        BOOST_TEST(px.get() == p);
        BOOST_TEST(px? true: false);
        BOOST_TEST(!!px);
        BOOST_TEST(&*px == px.get());
        BOOST_TEST(px.operator ->() == px.get());

#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
        using boost::get_pointer;
#endif

        BOOST_TEST(get_pointer(px) == px.get());
    }
}

} // namespace n_access

namespace n_use_count
{

struct X
{
};

void test()
{
    {
        boost::shared_ptr<X> px(static_cast<X*>(0));
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        boost::shared_ptr<X> px2(px);
        BOOST_TEST(px2.use_count() == 2);
        BOOST_TEST(!px2.unique());
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(!px.unique());
    }

    {
        boost::shared_ptr<X> px(new X);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        boost::shared_ptr<X> px2(px);
        BOOST_TEST(px2.use_count() == 2);
        BOOST_TEST(!px2.unique());
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(!px.unique());
    }

    {
        boost::shared_ptr<X> px(new X, boost::checked_deleter<X>());
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());

        boost::shared_ptr<X> px2(px);
        BOOST_TEST(px2.use_count() == 2);
        BOOST_TEST(!px2.unique());
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(!px.unique());
    }
}

} // namespace n_use_count

namespace n_swap
{

struct X
{
};

void test()
{
    {
        boost::shared_ptr<X> px;
        boost::shared_ptr<X> px2;

        px.swap(px2);

        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px2.get() == 0);

        using std::swap;
        swap(px, px2);

        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px2.get() == 0);
    }

    {
        X * p = new X;
        boost::shared_ptr<X> px;
        boost::shared_ptr<X> px2(p);
        boost::shared_ptr<X> px3(px2);

        px.swap(px2);

        BOOST_TEST(px.get() == p);
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(px2.get() == 0);
        BOOST_TEST(px3.get() == p);
        BOOST_TEST(px3.use_count() == 2);

        using std::swap;
        swap(px, px2);

        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px2.get() == p);
        BOOST_TEST(px2.use_count() == 2);
        BOOST_TEST(px3.get() == p);
        BOOST_TEST(px3.use_count() == 2);
    }

    {
        X * p1 = new X;
        X * p2 = new X;
        boost::shared_ptr<X> px(p1);
        boost::shared_ptr<X> px2(p2);
        boost::shared_ptr<X> px3(px2);

        px.swap(px2);

        BOOST_TEST(px.get() == p2);
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(px2.get() == p1);
        BOOST_TEST(px2.use_count() == 1);
        BOOST_TEST(px3.get() == p2);
        BOOST_TEST(px3.use_count() == 2);

        using std::swap;
        swap(px, px2);

        BOOST_TEST(px.get() == p1);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px2.get() == p2);
        BOOST_TEST(px2.use_count() == 2);
        BOOST_TEST(px3.get() == p2);
        BOOST_TEST(px3.use_count() == 2);
    }
}

} // namespace n_swap

namespace n_comparison
{

struct X
{
    int dummy;
};

struct Y
{
    int dummy2;
};

struct Z: public X, public virtual Y
{
};

void test()
{
    {
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