37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
#ifndef OSRM_ENGINE_DATAFACADE_SHARED_MEMORY_ALLOCATOR_HPP_
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#define OSRM_ENGINE_DATAFACADE_SHARED_MEMORY_ALLOCATOR_HPP_
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#include "engine/datafacade/contiguous_block_allocator.hpp"
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#include "storage/shared_data_index.hpp"
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#include "storage/shared_memory.hpp"
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#include <memory>
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namespace osrm::engine::datafacade
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{
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/**
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* This allocator uses an IPC shared memory block as the data location.
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* Many SharedMemoryDataFacade objects can be created that point to the same shared
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* memory block.
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*/
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class SharedMemoryAllocator final : public ContiguousBlockAllocator
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{
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public:
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explicit SharedMemoryAllocator(
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const std::vector<storage::SharedRegionRegister::ShmKey> &shm_keys);
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~SharedMemoryAllocator() override final;
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// interface to give access to the datafacades
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const storage::SharedDataIndex &GetIndex() override final;
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private:
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storage::SharedDataIndex index;
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std::vector<std::unique_ptr<storage::SharedMemory>> memory_regions;
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};
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} // namespace osrm::engine::datafacade
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#endif // OSRM_ENGINE_DATAFACADE_SHARED_MEMORY_ALLOCATOR_HPP_
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