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//
// immer: immutable data structures for C++
// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
//
// This software is distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
//
#pragma once
#include <immer/heap/unsafe_free_list_heap.hpp>
namespace immer {
namespace detail {
template <typename Heap>
struct thread_local_free_list_storage
{
struct head_t
{
free_list_node* data;
std::size_t count;
~head_t() { Heap::clear(); }
};
static head_t& head()
{
thread_local static head_t head_{nullptr, 0};
return head_;
}
};
} // namespace detail
/*!
* Adaptor that does not release the memory to the parent heap but
* instead it keeps the memory in a `thread_local` global free
* list. Must be preceded by a `with_data<free_list_node, ...>` heap
* adaptor. When the current thread finishes, the memory is returned
* to the parent heap.
*
* @tparam Size Maximum size of the objects to be allocated.
* @tparam Limit Maximum number of elements to keep in the free list.
* @tparam Base Type of the parent heap.
*/
template <std::size_t Size, std::size_t Limit, typename Base>
struct thread_local_free_list_heap
: detail::unsafe_free_list_heap_impl<detail::thread_local_free_list_storage,
Size,
Limit,
Base>
{};
} // namespace immer
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