shared_ptr_test.cpp

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        BOOST_TEST(!(pvx < pvz || pvz < pvx));
        BOOST_TEST(!(pvy < pvz || pvz < pvy));
    }
}

} // namespace n_comparison

namespace n_static_cast
{

struct X
{
};

struct Y: public X
{
};

void test()
{
    {
        boost::shared_ptr<void> pv;

        boost::shared_ptr<int> pi = boost::static_pointer_cast<int>(pv);
        BOOST_TEST(pi.get() == 0);

        boost::shared_ptr<X> px = boost::static_pointer_cast<X>(pv);
        BOOST_TEST(px.get() == 0);
    }

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

        boost::shared_ptr<int> pi2 = boost::static_pointer_cast<int>(pv);
        BOOST_TEST(pi.get() == pi2.get());
        BOOST_TEST(!(pi < pi2 || pi2 < pi));
        BOOST_TEST(pi.use_count() == 3);
        BOOST_TEST(pv.use_count() == 3);
        BOOST_TEST(pi2.use_count() == 3);
    }

    {
        boost::shared_ptr<X> px(new X);
        boost::shared_ptr<void> pv(px);

        boost::shared_ptr<X> px2 = boost::static_pointer_cast<X>(pv);
        BOOST_TEST(px.get() == px2.get());
        BOOST_TEST(!(px < px2 || px2 < px));
        BOOST_TEST(px.use_count() == 3);
        BOOST_TEST(pv.use_count() == 3);
        BOOST_TEST(px2.use_count() == 3);
    }

    {
        boost::shared_ptr<X> px(new Y);

        boost::shared_ptr<Y> py = boost::static_pointer_cast<Y>(px);
        BOOST_TEST(px.get() == py.get());
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(py.use_count() == 2);

        boost::shared_ptr<X> px2(py);
        BOOST_TEST(!(px < px2 || px2 < px));
    }
}

} // namespace n_static_cast

namespace n_const_cast
{

struct X;

void test()
{
    {
        boost::shared_ptr<void const volatile> px;

        boost::shared_ptr<void> px2 = boost::const_pointer_cast<void>(px);
        BOOST_TEST(px2.get() == 0);
    }

    {
        boost::shared_ptr<int const volatile> px;

        boost::shared_ptr<int> px2 = boost::const_pointer_cast<int>(px);
        BOOST_TEST(px2.get() == 0);
    }

    {
        boost::shared_ptr<X const volatile> px;

        boost::shared_ptr<X> px2 = boost::const_pointer_cast<X>(px);
        BOOST_TEST(px2.get() == 0);
    }

    {
        boost::shared_ptr<void const volatile> px(new int);

        boost::shared_ptr<void> px2 = boost::const_pointer_cast<void>(px);
        BOOST_TEST(px.get() == px2.get());
        BOOST_TEST(!(px < px2 || px2 < px));
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(px2.use_count() == 2);
    }

    {
        boost::shared_ptr<int const volatile> px(new int);

        boost::shared_ptr<int> px2 = boost::const_pointer_cast<int>(px);
        BOOST_TEST(px.get() == px2.get());
        BOOST_TEST(!(px < px2 || px2 < px));
        BOOST_TEST(px.use_count() == 2);
        BOOST_TEST(px2.use_count() == 2);
    }
}

} // namespace n_const_cast

namespace n_dynamic_cast
{

struct V
{
    virtual ~V() {}
};

struct W: public V
{
};

void test()
{
    {
        boost::shared_ptr<V> pv;
        boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(pv);
        BOOST_TEST(pw.get() == 0);
    }

    {
        boost::shared_ptr<V> pv(static_cast<V*>(0));

        boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(pv);
        BOOST_TEST(pw.get() == 0);

        boost::shared_ptr<V> pv2(pw);
        BOOST_TEST(pv < pv2 || pv2 < pv);
    }

    {
        boost::shared_ptr<V> pv(static_cast<W*>(0));

        boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(pv);
        BOOST_TEST(pw.get() == 0);

        boost::shared_ptr<V> pv2(pw);
        BOOST_TEST(pv < pv2 || pv2 < pv);
    }

    {
        boost::shared_ptr<V> pv(new V);

        boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(pv);
        BOOST_TEST(pw.get() == 0);

        boost::shared_ptr<V> pv2(pw);
        BOOST_TEST(pv < pv2 || pv2 < pv);
    }

    {
        boost::shared_ptr<V> pv(new W);

        boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(pv);
        BOOST_TEST(pw.get() == pv.get());
        BOOST_TEST(pv.use_count() == 2);
        BOOST_TEST(pw.use_count() == 2);

        boost::shared_ptr<V> pv2(pw);
        BOOST_TEST(!(pv < pv2 || pv2 < pv));
    }
}

} // namespace n_dynamic_cast

namespace n_map
{

struct X
{
};

void test()
{
    std::vector< boost::shared_ptr<int> > vi;

    {
        boost::shared_ptr<int> pi1(new int);
        boost::shared_ptr<int> pi2(new int);
        boost::shared_ptr<int> pi3(new int);

        vi.push_back(pi1);
        vi.push_back(pi1);
        vi.push_back(pi1);
        vi.push_back(pi2);
        vi.push_back(pi1);
        vi.push_back(pi2);
        vi.push_back(pi1);
        vi.push_back(pi3);
        vi.push_back(pi3);
        vi.push_back(pi2);
        vi.push_back(pi1);
    }

    std::vector< boost::shared_ptr<X> > vx;

    {
        boost::shared_ptr<X> px1(new X);
        boost::shared_ptr<X> px2(new X);
        boost::shared_ptr<X> px3(new X);

        vx.push_back(px2);
        vx.push_back(px2);
        vx.push_back(px1);
        vx.push_back(px2);
        vx.push_back(px1);
        vx.push_back(px1);
        vx.push_back(px1);
        vx.push_back(px2);
        vx.push_back(px1);
        vx.push_back(px3);
        vx.push_back(px2);
    }

    std::map< boost::shared_ptr<void>, long > m;

    {
        for(std::vector< boost::shared_ptr<int> >::iterator i = vi.begin(); i != vi.end(); ++i)
        {
            ++m[*i];
        }
    }

    {
        for(std::vector< boost::shared_ptr<X> >::iterator i = vx.begin(); i != vx.end(); ++i)
        {
            ++m[*i];
        }
    }

    {
        for(std::map< boost::shared_ptr<void>, long >::iterator i = m.begin(); i != m.end(); ++i)
        {
            BOOST_TEST(i->first.use_count() == i->second + 1);
        }
    }
}

} // namespace n_map

namespace n_transitive
{

struct X
{
    X(): next() {}
    boost::shared_ptr<X> next;
};

void test()
{
    boost::shared_ptr<X> p(new X);
    p->next = boost::shared_ptr<X>(new X);
    BOOST_TEST(!p->next->next);
    p = p->next;
    BOOST_TEST(!p->next);
}

} // namespace n_transitive

namespace n_report_1
{

class foo
{ 
public: 

    foo(): m_self(this)
    {
    } 

    void suicide()
    {
        m_self.reset();
    }

private:

    boost::shared_ptr<foo> m_self;
}; 

void test()
{
    foo * foo_ptr = new foo;
    foo_ptr->suicide();
} 

} // namespace n_report_1

// Test case by Per Kristensen
namespace n_report_2
{

class foo
{
public:

    void setWeak(boost::shared_ptr<foo> s)
    {
        w = s;
    }

private:

    boost::weak_ptr<foo> w;
};
 
class deleter
{
public:

    deleter(): lock(0)
    {
    }

    ~deleter()
    {
        BOOST_TEST(lock == 0);
    }

    void operator() (foo * p)
    {
        ++lock;
        delete p;
        --lock;
    }
 
private:

    int lock;
};
 
void test()
{
    boost::shared_ptr<foo> s(new foo, deleter());
    s->setWeak(s);
    s.reset();
}

} // namespace n_report_2

namespace n_spt_incomplete
{

class file;

boost::shared_ptr<file> fopen(char const * name, char const * mode);
void fread(boost::shared_ptr<file> f, void * data, long size);

int file_instances = 0;

void test()
{
    BOOST_TEST(file_instances == 0);

    {
        boost::shared_ptr<file> pf = fopen("name", "mode");
        BOOST_TEST(file_instances == 1);
        fread(pf, 0, 17041);
    }

    BOOST_TEST(file_instances == 0);
}

} // namespace n_spt_incomplete

namespace n_spt_pimpl
{

class file
{
private:

    class impl;
    boost::shared_ptr<impl> pimpl_;

public:

    file(char const * name, char const * mode);

    // compiler generated members are fine and useful

    void read(void * data, long size);

    long total_size() const;
};

int file_instances = 0;

void test()
{
    BOOST_TEST(file_instances == 0);

    {
        file f("name", "mode");
        BOOST_TEST(file_instances == 1);
        f.read(0, 152);

        file f2(f);
        BOOST_TEST(file_instances == 1);
        f2.read(0, 894);

        BOOST_TEST(f.total_size() == 152+894);

        {
            file f3("name2", "mode2");
            BOOST_TEST(file_instances == 2);
        }

        BOOST_TEST(file_instances == 1);
    }

    BOOST_TEST(file_instances == 0);
}

} // namespace n_spt_pimpl

namespace n_spt_abstract
{

class X
{
public:

    virtual void f(int) = 0;
    virtual int g() = 0;

protected:

    ~X() {}
};

boost::shared_ptr<X> createX();

int X_instances = 0;

void test()
{
    BOOST_TEST(X_instances == 0);

    {
        boost::shared_ptr<X> px = createX();

        BOOST_TEST(X_instances == 1);

        px->f(18);
        px->f(152);

        BOOST_TEST(px->g() == 170);
    }

    BOOST_TEST(X_instances == 0);
}

} // namespace n_spt_abstract

namespace n_spt_preventing_delete
{

int X_instances = 0;

class X
{
private:

    X()
    {
        ++X_instances;
    }

    ~X()
    {
        --X_instances;
    }

    class deleter;
    friend class deleter;

    class deleter
    {
    public:

        void operator()(X * p) { delete p; }
    };

public:

    static boost::shared_ptr<X> create()
    {
        boost::shared_ptr<X> px(new X, X::deleter());
        return px;
    }
};

void test()
{
    BOOST_TEST(X_instances == 0);

    {
        boost::shared_ptr<X> px = X::create();
        BOOST_TEST(X_instances == 1);
    }

    BOOST_TEST(X_instances == 0);
}

} // namespace n_spt_preventing_delete

namespace n_spt_array
{

int X_instances = 0;

struct X
{
    X()
    {
        ++X_instances;
    }

    ~X()
    {
        --X_instances;
    }
};

void test()
{
    BOOST_TEST(X_instances == 0);

    {
        boost::shared_ptr<X> px(new X[4], boost::checked_array_deleter<X>());
        BOOST_TEST(X_instances == 4);
    }

    BOOST_TEST(X_instances == 0);
}

} // namespace n_spt_array

namespace n_spt_static
{

class X
{
public:

    X()
    {
    }

private:

    void operator delete(void *)
    {
        // Comeau 4.3.0.1 wants a definition
        BOOST_ERROR("n_spt_static::X::operator delete() called.");
    }
};

struct null_deleter
{
    void o