stdout_sink.h

/*
 *  MoMEMta: a modular implementation of the Matrix Element Method
 *  Copyright (C) 2016  Universite catholique de Louvain (UCL), Belgium
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

// Heavily inspired by spdlog, Copyright(c) 2015 Gabi Melman

#pragma once

#include <logger/base_sink.h>
#include <logger/null_mutex.h>

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

namespace logger {

namespace sinks {

template <class Mutex>
class stdout_sink: public base_sink<Mutex> {
    using type = stdout_sink<Mutex>;
public:
    stdout_sink() {}
    static std::shared_ptr<type> instance() {
        static std::shared_ptr<type> instance = std::make_shared<type>();
        return instance;
    }

    void _sink_it(const details::log_msg& msg) override {
        auto s = msg.formatted.str();
        fwrite(s.data(), sizeof(char), s.size(), stdout);
        flush();
    }

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

typedef stdout_sink<details::null_mutex> stdout_sink_st;
typedef stdout_sink<std::mutex> stdout_sink_mt;


}

}