event_handler.hpp

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// Copyright (c) 2022 MIT Digital Currency Initiative,
//                    Federal Reserve Bank of Boston
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef OPENCBDC_TX_SRC_RPC_EVENT_HANDLER_H_
#define OPENCBDC_TX_SRC_RPC_EVENT_HANDLER_H_
 
#include <cstdint>
#include <optional>
#include <vector>
 
namespace cbdc::rpc {
    class event_handler {
      public:
        enum class event_type {
            remove,
            in,
            out,
            inout,
        };
 
        virtual ~event_handler() = default;
 
        using event = std::pair<int, bool>;
 
        virtual auto init() -> bool = 0;
 
        virtual void set_timeout(long timeout_ms) = 0;
 
        virtual void register_fd(int fd, event_type et) = 0;
 
        virtual auto poll() -> std::optional<std::vector<event>> = 0;
    };
}
 
#endif