mmu.h

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#pragma once
 
#include <memory>
 
#include "contur/memory/i_mmu.h"
#include "contur/memory/i_page_replacement.h"
 
namespace contur {
 
    // Forward declarations
    class IMemory;

    class Mmu final : public IMMU
    {
        public:
        explicit Mmu(IMemory &memory, std::unique_ptr<IPageReplacementPolicy> replacementPolicy);
        ~Mmu() override;
 
        // Non-copyable, movable
        Mmu(const Mmu &) = delete;
        Mmu &operator=(const Mmu &) = delete;
        Mmu(Mmu &&) noexcept;
        Mmu &operator=(Mmu &&) noexcept;
 
        // IMMU interface
        [[nodiscard]] Result<Block> read(ProcessId processId, MemoryAddress virtualAddress) const override;
        [[nodiscard]] Result<void>
        write(ProcessId processId, MemoryAddress virtualAddress, const Block &block) override;
        [[nodiscard]] Result<MemoryAddress> allocate(ProcessId processId, std::size_t pageCount) override;
        [[nodiscard]] Result<void> deallocate(ProcessId processId) override;
        [[nodiscard]] Result<void> swapIn(ProcessId processId, MemoryAddress virtualAddress) override;
        [[nodiscard]] Result<void> swapOut(ProcessId processId, MemoryAddress virtualAddress) override;
        [[nodiscard]] std::size_t totalFrames() const noexcept override;
        [[nodiscard]] std::size_t freeFrames() const noexcept override;
 
        private:
        struct Impl;
        std::unique_ptr<Impl> impl_;
    };
 
} // namespace contur