46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
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#ifndef OSRM_ENGINE_DATAFACADE_MMAP_MEMORY_ALLOCATOR_HPP_
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#define OSRM_ENGINE_DATAFACADE_MMAP_MEMORY_ALLOCATOR_HPP_
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#include "engine/datafacade/contiguous_block_allocator.hpp"
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#include "storage/storage_config.hpp"
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#include "util/vector_view.hpp"
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#include <boost/iostreams/device/mapped_file.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 file backed mmap memory block as the data location.
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*/
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class MMapMemoryAllocator : public ContiguousBlockAllocator
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{
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public:
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explicit MMapMemoryAllocator(const storage::StorageConfig &config,
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const boost::filesystem::path &memory_file);
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~MMapMemoryAllocator() 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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storage::DataLayout *data_layout;
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util::vector_view<char> mapped_memory;
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boost::iostreams::mapped_file mapped_memory_file;
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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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