concurrent_map.hpp

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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright 2019-2021, Intel Corporation */
 
#ifndef PMEMOBJ_CONCURRENT_MAP_HPP
#define PMEMOBJ_CONCURRENT_MAP_HPP
 
#include <libpmemobj++/allocator.hpp>
#include <libpmemobj++/container/detail/concurrent_skip_list_impl.hpp>
#include <libpmemobj++/detail/pair.hpp>
 
namespace pmem
{
namespace obj
{
namespace experimental
{
 
template <typename Key, typename Value, typename Comp = std::less<Key>,
      typename Allocator =
          pmem::obj::allocator<detail::pair<const Key, Value>>>
class concurrent_map
    : public detail::concurrent_skip_list<detail::map_traits<
          Key, Value, Comp, detail::default_random_generator, Allocator,
          false, 64>> {
    using traits_type = detail::map_traits<Key, Value, Comp,
                           detail::default_random_generator,
                           Allocator, false, 64>;
    using base_type = pmem::detail::concurrent_skip_list<traits_type>;
 
public:
    using key_type = typename base_type::key_type;
    using mapped_type = typename base_type::mapped_type;
    using value_type = typename base_type::value_type;
    using size_type = typename base_type::size_type;
    using difference_type = typename base_type::difference_type;
    using key_compare = Comp;
    using allocator_type = Allocator;
    using reference = typename base_type::reference;
    using const_reference = typename base_type::const_reference;
    using pointer = typename base_type::pointer;
    using const_pointer = typename base_type::const_pointer;
    using iterator = typename base_type::iterator;
    using const_iterator = typename base_type::const_iterator;
 
    concurrent_map() = default;
 
    concurrent_map(const concurrent_map &table) : base_type(table)
    {
    }
 
    concurrent_map(concurrent_map &&table) : base_type(std::move(table))
    {
    }
 
    explicit concurrent_map(const key_compare &comp,
                const allocator_type &alloc = allocator_type())
        : base_type(comp, alloc)
    {
    }
 
    template <class InputIt>
    concurrent_map(InputIt first, InputIt last,
               const key_compare &comp = Comp(),
               const allocator_type &alloc = allocator_type())
        : base_type(first, last, comp, alloc)
    {
    }
 
    concurrent_map(std::initializer_list<value_type> ilist)
        : base_type(ilist.begin(), ilist.end())
    {
    }
 
    concurrent_map &
    operator=(const concurrent_map &other)
    {
        return static_cast<concurrent_map &>(
            base_type::operator=(other));
    }
 
    concurrent_map &
    operator=(concurrent_map &&other)
    {
        return static_cast<concurrent_map &>(
            base_type::operator=(std::move(other)));
    }
 
    concurrent_map &
    operator=(std::initializer_list<value_type> ilist)
    {
        return static_cast<concurrent_map &>(
            base_type::operator=(ilist));
    }
};
 
template <typename Key, typename Value, typename Comp, typename Allocator>
void
swap(concurrent_map<Key, Value, Comp, Allocator> &lhs,
     concurrent_map<Key, Value, Comp, Allocator> &rhs)
{
    lhs.swap(rhs);
}
 
} /* namespace experimental */
} /* namespace obj */
} /* namespace pmem */
#endif /* PMEMOBJ_CONCURRENT_MAP_HPP */