connection_list.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 <memory>
#include <mutex>
#include <unordered_map>
 
namespace msgpack_rpc::transport {

template <typename Connection>
class ConnectionList {
public:
    ConnectionList() = default;

    void append(const std::shared_ptr<Connection>& connection) {
        std::unique_lock<std::mutex> lock(mutex_);
        list_.try_emplace(connection.get(), connection);
    }

    void remove(const std::shared_ptr<Connection>& connection) {
        remove(connection.get());
    }

    void remove(Connection* connection) {
        std::unique_lock<std::mutex> lock(mutex_);
        list_.erase(connection);
    }

    void async_close_all() {
        std::unique_lock<std::mutex> lock(mutex_);
        for (const auto& pair : list_) {
            const auto connection = pair.second.lock();
            if (connection) {
                connection->async_close();
            }
        }
    }
 
private:
    std::unordered_map<Connection*, std::weak_ptr<Connection>> list_{};

    std::mutex mutex_{};
};
 
}  // namespace msgpack_rpc::transport