sysinfo.h

Go to the documentation of this file.

// -*- mode: c++; tab-width: 4; indent-tabs-mode: t; eval: (progn (c-set-style "stroustrup") (c-set-offset 'innamespace 0)); -*-
// vi:set ts=4 sts=4 sw=4 noet :
// Copyright 2012, The TPIE development team
// 
// This file is part of TPIE.
// 
// TPIE is free software: you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the
// Free Software Foundation, either version 3 of the License, or (at your
// option) any later version.
// 
// TPIE 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 Lesser General Public
// License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with TPIE.  If not, see <http://www.gnu.org/licenses/>


#ifndef __TPIE_SYSINFO__
#define __TPIE_SYSINFO__

#include <iostream>
#include <iomanip>
#include <boost/asio/ip/host_name.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <tpie/file.h> // for block size
#include <tpie/tpie_log.h>

namespace tpie {

extern const char * git_commit;

extern const char * git_refspec;

struct sysinfo {
    inline sysinfo()
        : m_platform(calc_platform())
        , m_hostname(calc_hostname())
        , m_blocksize(calc_blocksize())
    {
        // Does nothing.
    }

    inline std::string commit()    const { return git_commit; }

    inline std::string refspec()   const { return git_refspec; }

    inline std::string platform()  const { return m_platform; }

    inline std::string hostname()  const { return m_hostname; }

    inline std::string blocksize() const { return m_blocksize; }

    inline std::string localtime() const {
        boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
        return to_simple_string(now);
    }

    template <typename V>
    inline std::string custominfo(std::string key, const V & value) {
        std::stringstream builder;
        if (key != "") key += ':';
        builder.flags(std::ios::left);
        builder << std::setw(16) << key << value;
        return builder.str();
    }

    template <typename V>
    inline void printinfo(std::string key, const V & value) {
        std::cout << custominfo(key, value) << std::endl;
    }

    static inline memory_size_type blocksize_bytes() {
        return get_block_size();
    }

private:
    static const char * m_commit;
    static const char * m_refspec;
    const std::string m_platform;
    const std::string m_hostname;
    const std::string m_blocksize;

    static inline std::string calc_platform() {
        std::stringstream p;
#ifdef WIN32
        p << "Windows ";
#else
        p << "Linux ";
#endif
        p << (8*sizeof(size_t)) << "-bit";
        return p.str();
    }

    static inline std::string calc_hostname() {
        try {
            return boost::asio::ip::host_name();
        } catch (boost::system::system_error & e) {
            log_debug() << "boost::system::system_error thrown while getting hostname. e.what() == " << e.what() << std::endl;
            return "Exception";
        }
    }

    static inline std::string calc_blocksize() {
        std::stringstream ss;
        ss << blocksize_bytes() / 1024
           << " KiB";
        return ss.str();
    }
};

inline std::ostream & operator<<(std::ostream & s, const sysinfo & info) {
    return s
        << "Hostname:       " << info.hostname() << '\n'
        << "Platform:       " << info.platform() << '\n'
        << "Git branch:     " << info.refspec() << '\n'
        << "Git commit:     " << info.commit() << '\n'
        << "Local time:     " << info.localtime() << '\n'
        << "Block size:     " << info.blocksize() << '\n'
        << "Parallel sort:  "
#ifdef TPIE_PARALLEL_SORT
        << "Enabled"
#else
        << "Disabled"
#endif
        << '\n'
        << "Snappy:         "
#ifdef TPIE_HAS_SNAPPY
        << "Enabled"
#else
        << "Disabled"
#endif
        << '\n'
        ;
}

}

#endif // __TPIE_SYSINFO__