coalescing_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>
#include <vector>
 
namespace vecmem::details {
 
class coalescing_memory_resource_impl {
 
public:
    explicit coalescing_memory_resource_impl(
        std::vector<std::reference_wrapper<memory_resource>>&& upstreams);
 
    void* allocate(std::size_t size, std::size_t align);
    void deallocate(void* p, std::size_t size, std::size_t align);
 
private:
    const std::vector<std::reference_wrapper<memory_resource>> m_upstreams;
 
    std::unordered_map<void*, std::reference_wrapper<memory_resource>>
        m_allocations;
 
};  // class coalescing_memory_resource_impl
 
}  // namespace vecmem::details