null_sink.h

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// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
#pragma once
 
#include <spdlog/details/null_mutex.h>
#include <spdlog/sinks/base_sink.h>
#include <spdlog/details/synchronous_factory.h>
 
#include <mutex>
 
namespace spdlog
{
    namespace sinks
    {
 
        template <typename Mutex>
        class null_sink : public base_sink<Mutex>
        {
        protected:
            void sink_it_(const details::log_msg&) override
            {
            }
            void flush_() override
            {
            }
        };
 
        using null_sink_mt = null_sink<details::null_mutex>;
        using null_sink_st = null_sink<details::null_mutex>;
 
    } // namespace sinks
 
    template <typename Factory = spdlog::synchronous_factory>
    inline std::shared_ptr<logger> null_logger_mt(const std::string& logger_name)
    {
        auto null_logger = Factory::template create<sinks::null_sink_mt>(logger_name);
        null_logger->set_level(level::off);
        return null_logger;
    }
 
    template <typename Factory = spdlog::synchronous_factory>
    inline std::shared_ptr<logger> null_logger_st(const std::string& logger_name)
    {
        auto null_logger = Factory::template create<sinks::null_sink_st>(logger_name);
        null_logger->set_level(level::off);
        return null_logger;
    }
 
} // namespace spdlog