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