virtual_memory.h

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#pragma once
 
#include <memory>
 
#include "contur/memory/i_virtual_memory.h"
 
namespace contur {
 
    // Forward declarations
    class IMMU;

    class VirtualMemory final : public IVirtualMemory
    {
        public:
        explicit VirtualMemory(IMMU &mmu, std::size_t maxSlots);

        ~VirtualMemory() override;
 
        // Non-copyable, movable
        VirtualMemory(const VirtualMemory &) = delete;
        VirtualMemory &operator=(const VirtualMemory &) = delete;
        VirtualMemory(VirtualMemory &&) noexcept;

        VirtualMemory &operator=(VirtualMemory &&) noexcept;
 
        // IVirtualMemory interface
        [[nodiscard]] Result<MemoryAddress> allocateSlot(ProcessId processId, std::size_t size) override;

        [[nodiscard]] Result<void> freeSlot(ProcessId processId) override;

        [[nodiscard]] Result<void> loadSegment(ProcessId processId, const std::vector<Block> &data) override;

        [[nodiscard]] Result<std::vector<Block>> readSegment(ProcessId processId) const override;

        [[nodiscard]] std::size_t totalSlots() const noexcept override;

        [[nodiscard]] std::size_t freeSlots() const noexcept override;

        [[nodiscard]] bool hasSlot(ProcessId processId) const noexcept override;

        [[nodiscard]] std::size_t slotSize(ProcessId processId) const noexcept override;
 
        private:
        struct Impl;
        std::unique_ptr<Impl> impl_;
    };
 
} // namespace contur