shared_memory.h

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#pragma once
 
#include <memory>
#include <string>
 
#include "contur/core/types.h"
 
#include "contur/ipc/i_ipc_channel.h"
 
namespace contur {

    class SharedMemory final : public IIpcChannel
    {
        public:
        explicit SharedMemory(std::string name, std::size_t bytes);
        ~SharedMemory() override;
 
        SharedMemory(const SharedMemory &) = delete;
        SharedMemory &operator=(const SharedMemory &) = delete;
        SharedMemory(SharedMemory &&) noexcept;
        SharedMemory &operator=(SharedMemory &&) noexcept;

        [[nodiscard]] Result<std::size_t> write(std::span<const std::byte> data) override;

        [[nodiscard]] Result<std::size_t> read(std::span<std::byte> buffer) override;

        void close() override;

        [[nodiscard]] bool isOpen() const noexcept override;

        [[nodiscard]] std::string_view name() const noexcept override;

        [[nodiscard]] Result<void> attach(ProcessId pid);

        [[nodiscard]] Result<void> detach(ProcessId pid);

        [[nodiscard]] bool isAttached(ProcessId pid) const noexcept;

        [[nodiscard]] std::size_t attachedCount() const noexcept;

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