spdlog/include/c11log/details/factory.h

#pragma once

#include <unordered_map>
#include <string>
#include <memory>
#include <mutex>

namespace c11log {
class logger;
namespace details {
class factory {
public:
    typedef std::shared_ptr<c11log::logger>  logger_ptr;
    typedef std::unordered_map<std::string, logger_ptr> logger_map;
    logger_ptr get_logger(const std::string &name);
    static c11log::details::factory& instance();
private:
    logger_map _loggers;
    std::mutex _loggers_mutex;
};
}
}


inline c11log::details::factory::logger_ptr c11log::details::factory::get_logger(const std::string &name)
{
    std::lock_guard<std::mutex> lock(_loggers_mutex);
    auto found = _loggers.find(name);
    if (found == _loggers.end()) {
        auto new_logger_ptr = std::make_shared<c11log::logger>(name);
        _loggers.insert(std::make_pair(name, new_logger_ptr));
        return new_logger_ptr;
    } else {
        return found->second;
    }
}

inline c11log::details::factory & c11log::details::factory::instance()
{
    static c11log::details::factory instance;
    return instance;
}