42 lines
1.0 KiB
C++
42 lines
1.0 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_datatype.hpp"
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#include "storage/shared_memory.hpp"
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#include <memory>
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namespace osrm
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{
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namespace engine
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{
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namespace 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 : public ContiguousBlockAllocator
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{
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public:
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explicit SharedMemoryAllocator(storage::SharedDataType data_region);
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~SharedMemoryAllocator() override final;
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// interface to give access to the datafacades
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storage::DataLayout &GetLayout() override final;
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char *GetMemory() override final;
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private:
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std::unique_ptr<storage::SharedMemory> m_large_memory;
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};
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} // namespace datafacade
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} // namespace engine
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} // namespace osrm
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#endif // OSRM_ENGINE_DATAFACADE_SHARED_MEMORY_ALLOCATOR_HPP_
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