unordered/test/objects/exception.hpp

// Copyright 2006-2009 Daniel James.
// 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)

#if !defined(BOOST_UNORDERED_EXCEPTION_TEST_OBJECTS_HEADER)
#define BOOST_UNORDERED_EXCEPTION_TEST_OBJECTS_HEADER

#include "../helpers/exception_test.hpp"

#include <cstddef>
#include <iostream>
#include <boost/limits.hpp>
#include <new>
#include "../helpers/fwd.hpp"
#include "../helpers/allocator.hpp"
#include "../helpers/memory.hpp"

namespace test
{
namespace exception
{
    namespace detail
    {
        namespace
        {
            test::detail::memory_tracker<test::malloc_allocator<int> > tracker;
        }
    }

    class object;
    class hash;
    class equal_to;
    template <class T> class allocator;
    object generate(object const*);

    class object
    {
    public:
        int tag1_, tag2_;

        explicit object() : tag1_(0), tag2_(0)
        {
            UNORDERED_SCOPE(object::object()) {
                UNORDERED_EPOINT("Mock object default constructor.");
            }
        }

        explicit object(int t1, int t2 = 0) : tag1_(t1), tag2_(t2)
        {
            UNORDERED_SCOPE(object::object(int)) {
                UNORDERED_EPOINT("Mock object constructor by value.");
            }
        }

        object(object const& x)
             : tag1_(x.tag1_), tag2_(x.tag2_)
        {
            UNORDERED_SCOPE(object::object(object)) {
                UNORDERED_EPOINT("Mock object copy constructor.");
            }
        }

        ~object() {
            tag1_ = -1;
            tag2_ = -1;
        }

        object& operator=(object const& x)
        {
            UNORDERED_SCOPE(object::operator=(object)) {
                tag1_ = x.tag1_;
                UNORDERED_EPOINT("Mock object assign operator 1.");
                tag2_ = x.tag2_;
                //UNORDERED_EPOINT("Mock object assign operator 2.");
            }
            return *this;
        }

        friend bool operator==(object const& x1, object const& x2) {
            UNORDERED_SCOPE(operator==(object, object)) {
                UNORDERED_EPOINT("Mock object equality operator.");
            }

            return x1.tag1_ == x2.tag1_ && x1.tag2_ == x2.tag2_;
        }

        friend bool operator!=(object const& x1, object const& x2) {
            UNORDERED_SCOPE(operator!=(object, object)) {
                UNORDERED_EPOINT("Mock object inequality operator.");
            }

            return !(x1.tag1_ == x2.tag1_ && x1.tag2_ == x2.tag2_);
        }

        // None of the last few functions are used by the unordered associative
        // containers - so there aren't any exception points.
        friend bool operator<(object const& x1, object const& x2) {
            return x1.tag1_ < x2.tag1_ ||
                (x1.tag1_ == x2.tag1_ && x1.tag2_ < x2.tag2_);
        }

        friend object generate(object const*) {
            int* x = 0;
            return object(::test::generate(x), ::test::generate(x));
        }

        friend std::ostream& operator<<(std::ostream& out, object const& o)
        {
            return out<<"("<<o.tag1_<<","<<o.tag2_<<")";
        }
    };

    class hash
    {
        int tag_;
    public:
        hash(int t = 0) : tag_(t)
        {
            UNORDERED_SCOPE(hash::object()) {
                UNORDERED_EPOINT("Mock hash default constructor.");
            }
        }

        hash(hash const& x)
            : tag_(x.tag_)
        {
            UNORDERED_SCOPE(hash::hash(hash)) {
                UNORDERED_EPOINT("Mock hash copy constructor.");
            }
        }

        hash& operator=(hash const& x)
        {
            UNORDERED_SCOPE(hash::operator=(hash)) {
                UNORDERED_EPOINT("Mock hash assign operator 1.");
                tag_ = x.tag_;
                UNORDERED_EPOINT("Mock hash assign operator 2.");
            }
            return *this;
        }

        std::size_t operator()(object const& x) const {
            UNORDERED_SCOPE(hash::operator()(object)) {
                UNORDERED_EPOINT("Mock hash function.");
            }

            switch(tag_) {
            case 1:
                return x.tag1_;
            case 2:
                return x.tag2_;
            default:
                return x.tag1_ + x.tag2_; 
            }
        }

        friend bool operator==(hash const& x1, hash const& x2) {
            UNORDERED_SCOPE(operator==(hash, hash)) {
                UNORDERED_EPOINT("Mock hash equality function.");
            }
            return x1.tag_ == x2.tag_;
        }

        friend bool operator!=(hash const& x1, hash const& x2) {
            UNORDERED_SCOPE(hash::operator!=(hash, hash)) {
                UNORDERED_EPOINT("Mock hash inequality function.");
            }
            return x1.tag_ != x2.tag_;
        }
    };

    class equal_to
    {
        int tag_;
    public:
        equal_to(int t = 0) : tag_(t)
        {
            UNORDERED_SCOPE(equal_to::equal_to()) {
                UNORDERED_EPOINT("Mock equal_to default constructor.");
            }
        }

        equal_to(equal_to const& x)
            : tag_(x.tag_)
        {
            UNORDERED_SCOPE(equal_to::equal_to(equal_to)) {
                UNORDERED_EPOINT("Mock equal_to copy constructor.");
            }
        }

        equal_to& operator=(equal_to const& x)
        {
            UNORDERED_SCOPE(equal_to::operator=(equal_to)) {
                UNORDERED_EPOINT("Mock equal_to assign operator 1.");
                tag_ = x.tag_;
                UNORDERED_EPOINT("Mock equal_to assign operator 2.");
            }
            return *this;
        }

        bool operator()(object const& x1, object const& x2) const {
            UNORDERED_SCOPE(equal_to::operator()(object, object)) {
                UNORDERED_EPOINT("Mock equal_to function.");
            }

            switch(tag_) {
            case 1:
                return x1.tag1_ == x2.tag1_;
            case 2:
                return x1.tag2_ == x2.tag2_;
            default:
                return x1 == x2; 
            }
        }

        friend bool operator==(equal_to const& x1, equal_to const& x2) {
            UNORDERED_SCOPE(operator==(equal_to, equal_to)) {
                UNORDERED_EPOINT("Mock equal_to equality function.");
            }
            return x1.tag_ == x2.tag_;
        }

        friend bool operator!=(equal_to const& x1, equal_to const& x2) {
            UNORDERED_SCOPE(operator!=(equal_to, equal_to)) {
                UNORDERED_EPOINT("Mock equal_to inequality function.");
            }
            return x1.tag_ != x2.tag_;
        }
    };

    template <class T>
    class allocator
    {
    public:
        int tag_;
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T* pointer;
        typedef T const* const_pointer;
        typedef T& reference;
        typedef T const& const_reference;
        typedef T value_type;

        template <class U> struct rebind { typedef allocator<U> other; };

        explicit allocator(int t = 0) : tag_(t)
        {
            UNORDERED_SCOPE(allocator::allocator()) {
                UNORDERED_EPOINT("Mock allocator default constructor.");
            }
            detail::tracker.allocator_ref();
        }

        template <class Y> allocator(allocator<Y> const& x) : tag_(x.tag_)
        {
            UNORDERED_SCOPE(allocator::allocator()) {
                UNORDERED_EPOINT("Mock allocator template copy constructor.");
            }
            detail::tracker.allocator_ref();
        }

        allocator(allocator const& x) : tag_(x.tag_)
        {
            UNORDERED_SCOPE(allocator::allocator()) {
                UNORDERED_EPOINT("Mock allocator copy constructor.");
            }
            detail::tracker.allocator_ref();
        }

        ~allocator() {
            detail::tracker.allocator_unref();
        }

        allocator& operator=(allocator const& x) {
            UNORDERED_SCOPE(allocator::allocator()) {
                UNORDERED_EPOINT("Mock allocator assignment operator.");
                tag_ = x.tag_;
            }
            return *this;
        }

        // If address throws, then it can't be used in erase or the
        // destructor, which is very limiting. I need to check up on
        // this.

        pointer address(reference r) {
            //UNORDERED_SCOPE(allocator::address(reference)) {
            //    UNORDERED_EPOINT("Mock allocator address function.");
            //}
            return pointer(&r);
        }

        const_pointer address(const_reference r)  {
            //UNORDERED_SCOPE(allocator::address(const_reference)) {
            //    UNORDERED_EPOINT("Mock allocator const address function.");
            //}
            return const_pointer(&r);
        }

        pointer allocate(size_type n) {
            T* ptr = 0;
            UNORDERED_SCOPE(allocator::allocate(size_type)) {
                UNORDERED_EPOINT("Mock allocator allocate function.");

                using namespace std;
                ptr = (T*) malloc(n * sizeof(T));
                if(!ptr) throw std::bad_alloc();
            }
            detail::tracker.track_allocate((void*) ptr, n, sizeof(T), tag_);
            return pointer(ptr);

            //return pointer(static_cast<T*>(::operator new(n * sizeof(T))));
        }

        pointer allocate(size_type n, void const* u)
        {
            T* ptr = 0;
            UNORDERED_SCOPE(allocator::allocate(size_type, const_pointer)) {
                UNORDERED_EPOINT("Mock allocator allocate function.");

                using namespace std;
                ptr = (T*) malloc(n * sizeof(T));
                if(!ptr) throw std::bad_alloc();
            }
            detail::tracker.track_allocate((void*) ptr, n, sizeof(T), tag_);
            return pointer(ptr);

            //return pointer(static_cast<T*>(::operator new(n * sizeof(T))));
        }

        void deallocate(pointer p, size_type n)
        {
            //::operator delete((void*) p);
            if(p) {
                detail::tracker.track_deallocate((void*) p, n, sizeof(T), tag_);
                using namespace std;
                free(p);
            }
        }

        void construct(pointer p, T const& t) {
            UNORDERED_SCOPE(allocator::construct(pointer, T)) {
                UNORDERED_EPOINT("Mock allocator construct function.");
                new(p) T(t);
            }
            detail::tracker.track_construct((void*) p, sizeof(T), tag_);
        }

#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
        template<class... Args> void construct(pointer p, Args&&... args) {
            UNORDERED_SCOPE(allocator::construct(pointer, Args&&...)) {
                UNORDERED_EPOINT("Mock allocator construct function.");
                new(p) T(std::forward<Args>(args)...);
            }
            detail::tracker.track_construct((void*) p, sizeof(T), tag_);
        }
#endif

        void destroy(pointer p) {
            detail::tracker.track_destroy((void*) p, sizeof(T), tag_);
            p->~T();
        }

        size_type max_size() const {
            UNORDERED_SCOPE(allocator::construct(pointer, T)) {
                UNORDERED_EPOINT("Mock allocator max_size function.");
            }
            return (std::numeric_limits<std::size_t>::max)();
        }
    };

    template <class T>
    void swap(allocator<T>& x, allocator<T>& y)
    {
        std::swap(x.tag_, y.tag_);
    }

    // It's pretty much impossible to write a compliant swap when these
    // two can throw. So they don't.

    template <class T>
    inline bool operator==(allocator<T> const& x, allocator<T> const& y)
    {
        //UNORDERED_SCOPE(operator==(allocator, allocator)) {
        //    UNORDERED_EPOINT("Mock allocator equality operator.");
        //}
        return x.tag_ == y.tag_;
    }

    template <class T>
    inline bool operator!=(allocator<T> const& x, allocator<T> const& y)
    {
        //UNORDERED_SCOPE(operator!=(allocator, allocator)) {
        //    UNORDERED_EPOINT("Mock allocator inequality operator.");
        //}
        return x.tag_ != y.tag_;
    }
}
}

// Workaround for ADL deficient compilers
#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
namespace test
{
    test::exception::object generate(test::exception::object const* x) {
        return test::exception::generate(x);
    }
}
#endif

#endif