choice_memory_resource_impl.hpp

/*
 * VecMem project, part of the ACTS project (R&D line)
 *
 * (c) 2021-2025 CERN for the benefit of the ACTS project
 *
 * Mozilla Public License Version 2.0
 */
 
#pragma once
 
// Local include(s).
#include "vecmem/memory/memory_resource.hpp"
 
// System include(s).
#include <functional>
#include <unordered_map>
 
namespace vecmem::details {

class choice_memory_resource_impl {
 
public:
    explicit choice_memory_resource_impl(
        std::function<memory_resource&(std::size_t, std::size_t)> decision);

    void* allocate(std::size_t size, std::size_t align);
    void deallocate(void* p, std::size_t size, std::size_t align);
 
private:
    std::unordered_map<void*, std::reference_wrapper<memory_resource>>
        m_allocations;

    std::function<memory_resource&(std::size_t, std::size_t)> m_decision;
 
};  // class choice_memory_resource_impl
 
}  // namespace vecmem::details