shared_ptr_test.cpp

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#include <boost/config.hpp>

#if defined(BOOST_MSVC)

#pragma warning(disable: 4786)  // identifier truncated in debug info
#pragma warning(disable: 4710)  // function not inlined
#pragma warning(disable: 4711)  // function selected for automatic inline expansion
#pragma warning(disable: 4514)  // unreferenced inline removed
#pragma warning(disable: 4355)  // 'this' : used in base member initializer list

#if (BOOST_MSVC >= 1310)
#pragma warning(disable: 4675)  // resolved overload found with Koenig lookup
#endif

#endif

//
//  shared_ptr_test.cpp
//
//  Copyright (c) 2002, 2003 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/detail/lightweight_test.hpp>

#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>

#include <map>
#include <vector>

//

namespace n_element_type
{

void f(int &)
{
}

void test()
{
    typedef boost::shared_ptr<int>::element_type T;
    T t;
    f(t);
}

} // namespace n_element_type

namespace n_constructors
{

class incomplete;

void default_constructor()
{
    {
        boost::shared_ptr<int> pi;
        BOOST_TEST(pi? false: true);
        BOOST_TEST(!pi);
        BOOST_TEST(pi.get() == 0);
        BOOST_TEST(pi.use_count() == 0);
    }

    {
        boost::shared_ptr<void> pv;
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 0);
    }

    {
        boost::shared_ptr<incomplete> px;
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 0);
    }
}

struct A
{
    int dummy;
};

struct X
{
    static long instances;

    X()
    {
        ++instances;
    }

    ~X()
    {
        --instances;
    }

private:

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

long X::instances = 0;

// virtual inheritance stresses the implementation

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;

template<class T> void pc0_test(T * p)
{
    BOOST_TEST(p == 0);
    boost::shared_ptr<T> pt(p);
    BOOST_TEST(pt? false: true);
    BOOST_TEST(!pt);
    BOOST_TEST(pt.get() == 0);
    BOOST_TEST(pt.use_count() == 1);
    BOOST_TEST(pt.unique());
}

void pointer_constructor()
{
    pc0_test(static_cast<int*>(0));

#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1300)

    pc0_test(static_cast<int const*>(0));
    pc0_test(static_cast<int volatile*>(0));
    pc0_test(static_cast<int const volatile*>(0));

#endif

    {
        boost::shared_ptr<int const> pi(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<int volatile> pi(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<void> pv(static_cast<int*>(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::shared_ptr<void const> pv(static_cast<int*>(0));
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    pc0_test(static_cast<X*>(0));
    pc0_test(static_cast<X const*>(0));
    pc0_test(static_cast<X volatile*>(0));
    pc0_test(static_cast<X const volatile*>(0));

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

    {
        int * p = new int(7);
        boost::shared_ptr<int> pi(p);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == p);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());
        BOOST_TEST(*pi == 7);
    }

    {
        int * p = new int(7);
        boost::shared_ptr<int const> pi(p);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == p);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());
        BOOST_TEST(*pi == 7);
    }

    {
        int * p = new int(7);
        boost::shared_ptr<void> pv(p);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == p);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    {
        int * p = new int(7);
        boost::shared_ptr<void const> pv(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 == 0);

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

    BOOST_TEST(X::instances == 0);

    {
        X * p = new X;
        boost::shared_ptr<X const> px(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);
    }

    BOOST_TEST(X::instances == 0);

    {
        X * p = new X;
        boost::shared_ptr<void> pv(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);
    }

    BOOST_TEST(X::instances == 0);

    {
        X * p = new X;
        boost::shared_ptr<void const> pv(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);
    }

    BOOST_TEST(X::instances == 0);
    BOOST_TEST(Y::instances == 0);

    {
        Y * p = new Y;
        boost::shared_ptr<X> px(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);
        BOOST_TEST(Y::instances == 1);
    }

    BOOST_TEST(X::instances == 0);
    BOOST_TEST(Y::instances == 0);

    {
        Y * p = new Y;
        boost::shared_ptr<X const> px(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);
        BOOST_TEST(Y::instances == 1);
    }

    BOOST_TEST(X::instances == 0);
    BOOST_TEST(Y::instances == 0);
}

int m = 0;

void deleter(int * p)
{
    BOOST_TEST(p == 0);
}

void deleter2(int * p)
{
    BOOST_TEST(p == &m);
    ++*p;
}

struct deleter3
{
    void operator()(incomplete * p)
    {
        BOOST_TEST(p == 0);
    }
};

// Borland C++ 5.5.1 fails on static_cast<incomplete*>(0)

incomplete * p0 = 0;

void deleter_constructor()
{
    {
        boost::shared_ptr<int> pi(static_cast<int*>(0), deleter);
        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<void> pv(static_cast<int*>(0), &deleter);
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    {
        boost::shared_ptr<void const> pv(static_cast<int*>(0), deleter);
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    {
        boost::shared_ptr<incomplete> px(p0, deleter3());
        BOOST_TEST(px? false: true);
        BOOST_TEST(!px);
        BOOST_TEST(px.get() == 0);
        BOOST_TEST(px.use_count() == 1);
        BOOST_TEST(px.unique());
    }

    {
        boost::shared_ptr<void> pv(p0, deleter3());
        BOOST_TEST(pv? false: true);
        BOOST_TEST(!pv);
        BOOST_TEST(pv.get() == 0);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    {
        boost::shared_ptr<void const> pv(p0, deleter3());
        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(m == 0);

    {
        boost::shared_ptr<int> pi(&m, deleter2);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == &m);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());
    }

    BOOST_TEST(m == 1);

    {
        boost::shared_ptr<int const> pi(&m, &deleter2);
        BOOST_TEST(pi? true: false);
        BOOST_TEST(!!pi);
        BOOST_TEST(pi.get() == &m);
        BOOST_TEST(pi.use_count() == 1);
        BOOST_TEST(pi.unique());
    }

    BOOST_TEST(m == 2);

    {
        boost::shared_ptr<void> pv(&m, deleter2);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == &m);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    BOOST_TEST(m == 3);

    {
        boost::shared_ptr<void const> pv(&m, &deleter2);
        BOOST_TEST(pv? true: false);
        BOOST_TEST(!!pv);
        BOOST_TEST(pv.get() == &m);
        BOOST_TEST(pv.use_count() == 1);
        BOOST_TEST(pv.unique());
    }

    BOOST_TEST(m == 4);
}

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

        boost::shared_ptr<int> pi2(pi);
        BOOST_TEST(pi2 == pi);
        BOOST_TEST(pi2? false: true);
        BOOST_TEST(!pi2);
        BOOST_TEST(pi2.get() == 0);
        BOOST_TEST(pi2.use_count() == pi.use_count());

        boost::shared_ptr<void> pi3(pi);
        BOOST_TEST(pi3 == pi);
        BOOST_TEST(pi3? false: true);
        BOOST_TEST(!pi3);
        BOOST_TEST(pi3.get() == 0);
        BOOST_TEST(pi3.use_count() == pi.use_count());

        boost::shared_ptr<void> pi4(pi3);
        BOOST_TEST(pi4 == pi3);
        BOOST_TEST(pi4? false: true);
        BOOST_TEST(!pi4);
        BOOST_TEST(pi4.get() == 0);
        BOOST_TEST(pi4.use_count() == pi3.use_count());
    }

    {
        boost::shared_ptr<void> pv;

        boost::shared_ptr<void> pv2(pv);
        BOOST_TEST(pv2 == pv);
        BOOST_TEST(pv2? false: true);
        BOOST_TEST(!pv2);
        BOOST_TEST(pv2.get() == 0);
        BOOST_TEST(pv2.use_count() == pv.use_count());
    }

    {
        boost::shared_ptr<incomplete> px;

        boost::shared_ptr<incomplete> px2(px);
        BOOST_TEST(px2 == px);
        BOOST_TEST(px2? false: true);
        BOOST_TEST(!px2);
        BOOST_TEST(px2.get() == 0);
        BOOST_TEST(px2.use_count() == px.use_count());

        boost::shared_ptr<void> px3(px);
        BOOST_TEST(px3 == px);
        BOOST_TEST(px3? false: true);
        BOOST_TEST(!px3);
        BOOST_TEST(px3.get() == 0);
        BOOST_TEST(px3.use_count() == px.use_count());
    }

    {
        boost::shared_ptr<int> pi(static_cast<int*>(0));

        boost::shared_ptr<int> pi2(pi);
        BOOST_TEST(pi2 == pi);
        BOOST_TEST(pi2? false: true);
        BOOST_TEST(!pi2);
        BOOST_TEST(pi2.get() == 0);
        BOOST_TEST(pi2.use_count() == 2);
        BOOST_TEST(!pi2.unique());
        BOOST_TEST(pi2.use_count() == pi.use_count());
        BOOST_TEST(!(pi < pi2 || pi2 < pi)); // shared ownership test

        boost::shared_ptr<void> pi3(pi);
        BOOST_TEST(pi3 == pi);
        BOOST_TEST(pi3? false: true);
        BOOST_TEST(!pi3);
        BOOST_TEST(pi3.get() == 0);
        BOOST_TEST(pi3.use_count() == 3);
        BOOST_TEST(!pi3.unique());
        BOOST_TEST(pi3.use_count() == pi.use_count());
        BOOST_TEST(!(pi < pi3 || pi3 < pi)); // shared ownership test

        boost::shared_ptr<void> pi4(pi2);
        BOOST_TEST(pi4 == pi2);
        BOOST_TEST(pi4? false: true);
        BOOST_TEST(!pi4);
        BOOST_TEST(pi4.get() == 0);
        BOOST_TEST(pi4.use_count() == 4);
        BOOST_TEST(!pi4.unique());