46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#ifndef OSRM_ENGINE_DATAFACADE_MMAP_MEMORY_ALLOCATOR_HPP_
|
|
#define OSRM_ENGINE_DATAFACADE_MMAP_MEMORY_ALLOCATOR_HPP_
|
|
|
|
#include "engine/datafacade/contiguous_block_allocator.hpp"
|
|
|
|
#include "storage/storage_config.hpp"
|
|
|
|
#include "util/vector_view.hpp"
|
|
|
|
#include <boost/iostreams/device/mapped_file.hpp>
|
|
|
|
#include <memory>
|
|
|
|
namespace osrm
|
|
{
|
|
namespace engine
|
|
{
|
|
namespace datafacade
|
|
{
|
|
|
|
/**
|
|
* This allocator uses file backed mmap memory block as the data location.
|
|
*/
|
|
class MMapMemoryAllocator : public ContiguousBlockAllocator
|
|
{
|
|
public:
|
|
explicit MMapMemoryAllocator(const storage::StorageConfig &config,
|
|
const boost::filesystem::path &memory_file);
|
|
~MMapMemoryAllocator() override final;
|
|
|
|
// interface to give access to the datafacades
|
|
storage::DataLayout &GetLayout() override final;
|
|
char *GetMemory() override final;
|
|
|
|
private:
|
|
storage::DataLayout *data_layout;
|
|
util::vector_view<char> mapped_memory;
|
|
boost::iostreams::mapped_file mapped_memory_file;
|
|
};
|
|
|
|
} // namespace datafacade
|
|
} // namespace engine
|
|
} // namespace osrm
|
|
|
|
#endif // OSRM_ENGINE_DATAFACADE_SHARED_MEMORY_ALLOCATOR_HPP_
|