hg_rpcs.hpp

    };

    class output {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        output() :
            m_err(),
            m_ret_size() {}

        output(int32_t err, int64_t ret_size) :
            m_err(err),
            m_ret_size(ret_size) {}

        output(output&& rhs) = default;
        output(const output& other) = default;
        output& operator=(output&& rhs) = default;
        output& operator=(const output& other) = default;

        explicit 
        output(const rpc_get_metadentry_size_out_t& out) {
            m_err = out.err;
            m_ret_size = out.ret_size;
        }

        int32_t
        err() const {
            return m_err;
        }

        int64_t
        ret_size() const {
            return m_ret_size;
        }

    private:
        int32_t m_err;
        int64_t m_ret_size;
    };
};

//==============================================================================
// definitions for update_metadentry_size
struct update_metadentry_size {

    // forward declarations of public input/output types for this RPC
    class input;
    class output;

    // traits used so that the engine knows what to do with the RPC
    using self_type = update_metadentry_size;
    using handle_type = hermes::rpc_handle<self_type>;
    using input_type = input;
    using output_type = output;
    using mercury_input_type = rpc_update_metadentry_size_in_t;
    using mercury_output_type = rpc_update_metadentry_size_out_t;

    // RPC public identifier
    // (N.B: we reuse the same IDs assigned by Margo so that the daemon 
    // understands Hermes RPCs)
    constexpr static const uint64_t public_id = 2760900608;

    // RPC internal Mercury identifier
    constexpr static const hg_id_t mercury_id = public_id;

    // RPC name
    constexpr static const auto name = hg_tag::update_metadentry_size;

    // requires response?
    constexpr static const auto requires_response = true;

    // Mercury callback to serialize input arguments
    constexpr static const auto mercury_in_proc_cb = 
        HG_GEN_PROC_NAME(rpc_update_metadentry_size_in_t);

    // Mercury callback to serialize output arguments
    constexpr static const auto mercury_out_proc_cb = 
        HG_GEN_PROC_NAME(rpc_update_metadentry_size_out_t);

    class input {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        input(const std::string& path, 
              uint64_t size, 
              int64_t offset, 
              bool append) :
            m_path(path),
            m_size(size),
            m_offset(offset),
            m_append(append) { }

        input(input&& rhs) = default;
        input(const input& other) = default;
        input& operator=(input&& rhs) = default;
        input& operator=(const input& other) = default;

        std::string
        path() const {
            return m_path;
        }

        uint64_t
        size() const {
            return m_size;
        }

        int64_t
        offset() const {
            return m_offset;
        }

        bool
        append() const {
            return m_append;
        }

        explicit
        input(const rpc_update_metadentry_size_in_t& other) :
            m_path(other.path),
            m_size(other.size), 
            m_offset(other.offset), 
            m_append(other.append) { }

        explicit
        operator rpc_update_metadentry_size_in_t() {
            return {m_path.c_str(), m_size, m_offset, m_append};
        }

    private:
        std::string m_path;
        uint64_t m_size;
        int64_t  m_offset;
        bool     m_append;
    };

    class output {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        output() :
            m_err(),
            m_ret_size() {}

        output(int32_t err, int64_t ret_size) :
            m_err(err),
            m_ret_size(ret_size) {}

        output(output&& rhs) = default;
        output(const output& other) = default;
        output& operator=(output&& rhs) = default;
        output& operator=(const output& other) = default;

        explicit 
        output(const rpc_update_metadentry_size_out_t& out) {
            m_err = out.err;
            m_ret_size = out.ret_size;
        }

        int32_t
        err() const {
            return m_err;
        }

        int64_t
        ret_size() const {
            return m_ret_size;
        }

    private:
        int32_t m_err;
        int64_t m_ret_size;
    };
};

#ifdef HAS_SYMLINKS

//==============================================================================
// definitions for mk_symlink
struct mk_symlink {

    // forward declarations of public input/output types for this RPC
    class input;
    class output;

    // traits used so that the engine knows what to do with the RPC
    using self_type = mk_symlink;
    using handle_type = hermes::rpc_handle<self_type>;
    using input_type = input;
    using output_type = output;
    using mercury_input_type = rpc_mk_symlink_in_t;
    using mercury_output_type = rpc_err_out_t;

    // RPC public identifier
    // (N.B: we reuse the same IDs assigned by Margo so that the daemon 
    // understands Hermes RPCs)
    constexpr static const uint64_t public_id = 3207004160;

    // RPC internal Mercury identifier
    constexpr static const hg_id_t mercury_id = public_id;

    // RPC name
    constexpr static const auto name = hg_tag::mk_symlink;

    // requires response?
    constexpr static const auto requires_response = true;

    // Mercury callback to serialize input arguments
    constexpr static const auto mercury_in_proc_cb = 
        HG_GEN_PROC_NAME(rpc_mk_symlink_in_t);

    // Mercury callback to serialize output arguments
    constexpr static const auto mercury_out_proc_cb = 
        HG_GEN_PROC_NAME(rpc_err_out_t);

    class input {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        input(const std::string& path, 
              const std::string& target_path) :
            m_path(path),
            m_target_path(target_path) { }

        input(input&& rhs) = default;
        input(const input& other) = default;
        input& operator=(input&& rhs) = default;
        input& operator=(const input& other) = default;

        std::string
        path() const {
            return m_path;
        }

        std::string
        target_path() const {
            return m_target_path;
        }

        explicit
        input(const rpc_mk_symlink_in_t& other) :
            m_path(other.path),
            m_target_path(other.target_path) { }

        explicit
        operator rpc_mk_symlink_in_t() {
            return {m_path.c_str(), m_target_path.c_str()};
        }

    private:
        std::string m_path;
        std::string m_target_path;
    };

    class output {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        output() :
            m_err() {}

        output(int32_t err) :
            m_err(err) {}

        output(output&& rhs) = default;
        output(const output& other) = default;
        output& operator=(output&& rhs) = default;
        output& operator=(const output& other) = default;

        explicit 
        output(const rpc_err_out_t& out) {
            m_err = out.err;
        }

        int32_t
        err() const {
            return m_err;
        }

    private:
        int32_t m_err;
    };
};

#endif // HAS_SYMLINKS

//==============================================================================
// definitions for write_data
struct write_data {

    // forward declarations of public input/output types for this RPC
    class input;
    class output;

    // traits used so that the engine knows what to do with the RPC
    using self_type = write_data;
    using handle_type = hermes::rpc_handle<self_type>;
    using input_type = input;
    using output_type = output;
    using mercury_input_type = rpc_write_data_in_t;
    using mercury_output_type = rpc_data_out_t;

    // RPC public identifier
    // (N.B: we reuse the same IDs assigned by Margo so that the daemon 
    // understands Hermes RPCs)
    constexpr static const uint64_t public_id = 3716481024;

    // RPC internal Mercury identifier
    constexpr static const hg_id_t mercury_id = public_id;

    // RPC name
    constexpr static const auto name = hg_tag::write_data;

    // requires response?
    constexpr static const auto requires_response = true;

    // Mercury callback to serialize input arguments
    constexpr static const auto mercury_in_proc_cb = 
        HG_GEN_PROC_NAME(rpc_write_data_in_t);

    // Mercury callback to serialize output arguments
    constexpr static const auto mercury_out_proc_cb = 
        HG_GEN_PROC_NAME(rpc_data_out_t);

    class input {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        input(const std::string& path, 
              int64_t offset,
              uint64_t host_id,
              uint64_t host_size,
              uint64_t chunk_n,
              uint64_t chunk_start,
              uint64_t chunk_end,
              uint64_t total_chunk_size,
              const hermes::exposed_memory& buffers) :
            m_path(path),
            m_offset(offset),
            m_host_id(host_id),
            m_host_size(host_size),
            m_chunk_n(chunk_n),
            m_chunk_start(chunk_start),
            m_chunk_end(chunk_end),
            m_total_chunk_size(total_chunk_size),
            m_buffers(buffers) { }

        input(input&& rhs) = default;
        input(const input& other) = default;
        input& operator=(input&& rhs) = default;
        input& operator=(const input& other) = default;

        std::string
        path() const {
            return m_path;
        }

        int64_t
        offset() const {
            return m_offset;
        }

        uint64_t
        host_id() const {
            return m_host_id;
        }

        uint64_t
        host_size() const {
            return m_host_size;
        }

        uint64_t
        chunk_n() const {
            return m_chunk_n;
        }

        uint64_t
        chunk_start() const {
            return m_chunk_start;
        }

        uint64_t
        chunk_end() const {
            return m_chunk_end;
        }

        uint64_t
        total_chunk_size() const {
            return m_total_chunk_size;
        }

        hermes::exposed_memory
        buffers() const {
            return m_buffers;
        }

        explicit
        input(const rpc_write_data_in_t& other) :
            m_path(other.path),
            m_offset(other.offset),
            m_host_id(other.host_id),
            m_host_size(other.host_size),
            m_chunk_n(other.chunk_n),
            m_chunk_start(other.chunk_start),
            m_chunk_end(other.chunk_end),
            m_total_chunk_size(other.total_chunk_size),
            m_buffers(other.bulk_handle) { }

        explicit
        operator rpc_write_data_in_t() {
            return {
                m_path.c_str(), 
                m_offset,
                m_host_id,
                m_host_size,
                m_chunk_n,
                m_chunk_start,
                m_chunk_end,
                m_total_chunk_size,
                hg_bulk_t(m_buffers)
            };
        }

    private:
        std::string m_path;
        int64_t m_offset;
        uint64_t m_host_id;
        uint64_t m_host_size;
        uint64_t m_chunk_n;
        uint64_t m_chunk_start;
        uint64_t m_chunk_end;
        uint64_t m_total_chunk_size;
        hermes::exposed_memory m_buffers;
    };

    class output {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        output() :
            m_err(),
            m_io_size() {}

        output(int32_t err, size_t io_size) :
            m_err(err),
            m_io_size(io_size) {}

        output(output&& rhs) = default;
        output(const output& other) = default;
        output& operator=(output&& rhs) = default;
        output& operator=(const output& other) = default;

        explicit 
        output(const rpc_data_out_t& out) {
            m_err = out.err;
            m_io_size = out.io_size;
        }

        int32_t
        err() const {
            return m_err;
        }

        int64_t
        io_size() const {
            return m_io_size;
        }

    private:
        int32_t m_err;
        size_t m_io_size;
    };
};

//==============================================================================
// definitions for read_data
struct read_data {

    // forward declarations of public input/output types for this RPC
    class input;
    class output;

    // traits used so that the engine knows what to do with the RPC
    using self_type = read_data;
    using handle_type = hermes::rpc_handle<self_type>;
    using input_type = input;
    using output_type = output;
    using mercury_input_type = rpc_read_data_in_t;
    using mercury_output_type = rpc_data_out_t;

    // RPC public identifier
    // (N.B: we reuse the same IDs assigned by Margo so that the daemon 
    // understands Hermes RPCs)
    constexpr static const uint64_t public_id = 892207104;

    // RPC internal Mercury identifier
    constexpr static const hg_id_t mercury_id = public_id;

    // RPC name
    constexpr static const auto name = hg_tag::read_data;

    // requires response?
    constexpr static const auto requires_response = true;

    // Mercury callback to serialize input arguments
    constexpr static const auto mercury_in_proc_cb = 
        HG_GEN_PROC_NAME(rpc_read_data_in_t);

    // Mercury callback to serialize output arguments
    constexpr static const auto mercury_out_proc_cb = 
        HG_GEN_PROC_NAME(rpc_data_out_t);

    class input {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        input(const std::string& path, 
              int64_t offset,
              uint64_t host_id,
              uint64_t host_size,
              uint64_t chunk_n,
              uint64_t chunk_start,
              uint64_t chunk_end,
              uint64_t total_chunk_size,
              const hermes::exposed_memory& buffers) :
            m_path(path),
            m_offset(offset),
            m_host_id(host_id),
            m_host_size(host_size),
            m_chunk_n(chunk_n),
            m_chunk_start(chunk_start),
            m_chunk_end(chunk_end),
            m_total_chunk_size(total_chunk_size),
            m_buffers(buffers) { }

        input(input&& rhs) = default;
        input(const input& other) = default;
        input& operator=(input&& rhs) = default;
        input& operator=(const input& other) = default;

        std::string
        path() const {
            return m_path;
        }

        int64_t
        offset() const {
            return m_offset;
        }

        uint64_t
        host_id() const {
            return m_host_id;
        }

        uint64_t
        host_size() const {
            return m_host_size;
        }

        uint64_t
        chunk_n() const {
            return m_chunk_n;
        }

        uint64_t
        chunk_start() const {
            return m_chunk_start;
        }

        uint64_t
        chunk_end() const {
            return m_chunk_end;
        }

        uint64_t
        total_chunk_size() const {
            return m_total_chunk_size;
        }

        hermes::exposed_memory
        buffers() const {
            return m_buffers;
        }

        explicit
        input(const rpc_read_data_in_t& other) :
            m_path(other.path),
            m_offset(other.offset),
            m_host_id(other.host_id),
            m_host_size(other.host_size),
            m_chunk_n(other.chunk_n),
            m_chunk_start(other.chunk_start),
            m_chunk_end(other.chunk_end),
            m_total_chunk_size(other.total_chunk_size),
            m_buffers(other.bulk_handle) { }

        explicit
        operator rpc_read_data_in_t() {
            return {
                m_path.c_str(), 
                m_offset,
                m_host_id,
                m_host_size,
                m_chunk_n,
                m_chunk_start,
                m_chunk_end,
                m_total_chunk_size,
                hg_bulk_t(m_buffers)
            };
        }

    private:
        std::string m_path;
        int64_t m_offset;
        uint64_t m_host_id;
        uint64_t m_host_size;
        uint64_t m_chunk_n;
        uint64_t m_chunk_start;
        uint64_t m_chunk_end;
        uint64_t m_total_chunk_size;
        hermes::exposed_memory m_buffers;
    };

    class output {

        template <typename ExecutionContext>
        friend hg_return_t hermes::detail::post_to_mercury(ExecutionContext*);

    public:
        output() :
            m_err(),
            m_io_size() {}

        output(int32_t err, size_t io_size) :
            m_err(err),
            m_io_size(io_size) {}

        output(output&& rhs) = default;
        output(const output& other) = default;
        output& operator=(output&& rhs) = default;
        output& operator=(const output& other) = default;

        explicit 
        output(const rpc_data_out_t& out) {
            m_err = out.err;
            m_io_size = out.io_size;
        }

        int32_t
        err() const {
            return m_err;
        }

        int64_t
        io_size() const {
            return m_io_size;
        }

    private:
        int32_t m_err;
        size_t m_io_size;
    };
};

} // namespace rpc
} // namespace gkfs


#endif // GKFS_RPCS_HPP