spdlog/include/spdlog/sinks/stdout_sinks.h

//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//

#pragma once

#include "../details/null_mutex.h"
#include "base_sink.h"

#include <cstdio>
#include <memory>
#include <mutex>

namespace spdlog { namespace sinks {

template <class Mutex> class stdout_sink SPDLOG_FINAL : public base_sink<Mutex>
{
    using MyType = stdout_sink<Mutex>;

public:
    explicit stdout_sink() = default;

    static std::shared_ptr<MyType> instance()
    {
        static std::shared_ptr<MyType> instance = std::make_shared<MyType>();
        return instance;
    }

protected:
    void _sink_it(const details::log_msg &msg) override
    {
        fwrite(msg.formatted.data(), sizeof(char), msg.formatted.size(), stdout);
        _flush();
    }

    void _flush() override
    {
        fflush(stdout);
    }
};

using stdout_sink_mt = stdout_sink<std::mutex>;
using stdout_sink_st = stdout_sink<details::null_mutex>;

template <class Mutex> class stderr_sink SPDLOG_FINAL : public base_sink<Mutex>
{
    using MyType = stderr_sink<Mutex>;

public:
    explicit stderr_sink() = default;

    static std::shared_ptr<MyType> instance()
    {
        static std::shared_ptr<MyType> instance = std::make_shared<MyType>();
        return instance;
    }

protected:
    void _sink_it(const details::log_msg &msg) override
    {
        fwrite(msg.formatted.data(), sizeof(char), msg.formatted.size(), stderr);
        _flush();
    }

    void _flush() override
    {
        fflush(stderr);
    }
};

using stderr_sink_mt = stderr_sink<std::mutex>;
using stderr_sink_st = stderr_sink<details::null_mutex>;

}} // namespace spdlog::sinks