request_id_generator.h

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/*
 * Copyright 2023 MusicScience37 (Kenta Kabashima)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once
 
#include <atomic>
#include <random>
 
#include "msgpack_rpc/messages/message_id.h"
 
namespace msgpack_rpc::clients::impl {

class RequestIDGenerator {
public:
    RequestIDGenerator() : next_id_(generate_initial_id()) {}

    [[nodiscard]] messages::MessageID generate() { return next_id_++; }
 
private:
    [[nodiscard]] static messages::MessageID generate_initial_id() {
        std::random_device generator;
        std::uniform_int_distribution<messages::MessageID> dist;
        return dist(generator);
    }

    std::atomic<messages::MessageID> next_id_;
};
 
}  // namespace msgpack_rpc::clients::impl