handler.hpp

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#pragma once
 
#include "ublk/ublk_cmd.h"
#include <concepts>
#include <condy.hpp>
#include <cstddef>
#include <cstdint>
 
namespace ublk {
 
namespace detail {
namespace ex = condy::detail::ex;
}

struct IoData {
    uint16_t q_id;
    uint16_t tag;
    const ublksrv_io_desc *iod;
    void *buf;
};

template <typename T>
concept IoHandler = requires(T &t, const IoData &io_data) {
    { t.handle_io(io_data) } noexcept -> detail::ex::sender;
};

template <typename T>
concept QueueHandler = requires(T &t, uint16_t q_id) {
    { t.init_queue(q_id) } noexcept -> detail::ex::sender;
    { t.destroy_queue(q_id) } noexcept -> std::same_as<void>;
};

template <typename T>
concept ShmHandler = requires(T &t, int32_t index, void *base, size_t size) {
    { t.handle_reg_shm(index, base, size) } noexcept -> detail::ex::sender;
    { t.handle_unreg_shm(index) } noexcept -> std::same_as<void>;
};
 
} // namespace ublk