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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2014 Regents of the University of California,
* Arizona Board of Regents,
* Colorado State University,
* University Pierre & Marie Curie, Sorbonne University,
* Washington University in St. Louis,
* Beijing Institute of Technology
*
* This file is part of NFD (Named Data Networking Forwarding Daemon).
* See AUTHORS.md for complete list of NFD authors and contributors.
*
* NFD 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.
*
* NFD 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
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
**/
#ifndef NFD_CORE_LOGGER_HPP
#define NFD_CORE_LOGGER_HPP
#include "common.hpp"
#include <ndn-cpp-dev/util/time.hpp>
/// \todo use when we enable C++11 (see todo in now())
// #include <cinttypes>
namespace nfd {
enum LogLevel {
LOG_NONE = 0, // no messages
LOG_ERROR = 1, // serious error messages
LOG_WARN = 2, // warning messages
LOG_INFO = 3, // informational messages
LOG_DEBUG = 4, // debug messages
LOG_TRACE = 5, // trace messages (most verbose)
// LOG_FATAL is not a level and is logged unconditionally
LOG_ALL = 255 // all messages
};
class Logger
{
public:
Logger(const std::string& name, LogLevel level)
: m_moduleName(name)
, m_enabledLogLevel(level)
{
}
bool
isEnabled(LogLevel level) const
{
// std::cerr << m_moduleName <<
// " enabled = " << m_enabledLogLevel
// << " level = " << level << std::endl;
return (m_enabledLogLevel >= level);
}
void
setLogLevel(LogLevel level)
{
m_enabledLogLevel = level;
}
const std::string&
getName() const
{
return m_moduleName;
}
void
setName(const std::string& name)
{
m_moduleName = name;
}
/// \brief return a string representation of time since epoch: seconds.microseconds
static std::string
now()
{
using namespace ndn::time;
static const microseconds::rep ONE_SECOND = 1000000;
microseconds::rep microseconds_since_epoch =
duration_cast<microseconds>(system_clock::now().time_since_epoch()).count();
// 10 (whole seconds) + '.' + 6 (fraction) + 1 (\0)
char buffer[10 + 1 + 6 + 1];
::snprintf(buffer, sizeof(buffer), "%lld.%06lld",
static_cast<long long int>(microseconds_since_epoch / ONE_SECOND),
static_cast<long long int>(microseconds_since_epoch % ONE_SECOND));
/// \todo use this version when we enable C++11 to avoid casting
// ::snprintf(buffer, sizeof(buffer), "%" PRIdLEAST64 ".%06" PRIdLEAST64,
// microseconds_since_epoch / ONE_SECOND,
// microseconds_since_epoch % ONE_SECOND);
return std::string(buffer);
}
private:
std::string m_moduleName;
LogLevel m_enabledLogLevel;
};
inline std::ostream&
operator<<(std::ostream& output, const Logger& logger)
{
output << logger.getName();
return output;
}
} // namespace nfd
#include "core/logger-factory.hpp"
namespace nfd {
#define NFD_LOG_INIT(name) \
static nfd::Logger& g_logger = nfd::LoggerFactory::create(name)
#define NFD_LOG_INCLASS_DECLARE() \
static nfd::Logger& g_logger
#define NFD_LOG_INCLASS_DEFINE(cls, name) \
nfd::Logger& cls::g_logger = nfd::LoggerFactory::create(name)
#define NFD_LOG_INCLASS_TEMPLATE_DEFINE(cls, name) \
template<class T> \
nfd::Logger& cls<T>::g_logger = nfd::LoggerFactory::create(name)
#define NFD_LOG_INCLASS_TEMPLATE_SPECIALIZATION_DEFINE(cls, specialization, name) \
template<> \
nfd::Logger& cls<specialization>::g_logger = nfd::LoggerFactory::create(name)
#define NFD_LOG_INCLASS_2TEMPLATE_SPECIALIZATION_DEFINE(cls, s1, s2, name) \
template<> \
nfd::Logger& cls<s1, s2>::g_logger = nfd::LoggerFactory::create(name)
#define NFD_LOG(level, expression) \
do { \
if (g_logger.isEnabled(::nfd::LOG_##level)) \
std::clog << ::nfd::Logger::now() << " "#level": " \
<< "[" << g_logger << "] " << expression << "\n"; \
} while (false)
#define NFD_LOG_TRACE(expression) NFD_LOG(TRACE, expression)
#define NFD_LOG_DEBUG(expression) NFD_LOG(DEBUG, expression)
#define NFD_LOG_INFO(expression) NFD_LOG(INFO, expression)
#define NFD_LOG_ERROR(expression) NFD_LOG(ERROR, expression)
// specialize WARN because the message is "WARNING" instead of "WARN"
#define NFD_LOG_WARN(expression) \
do { \
if (g_logger.isEnabled(::nfd::LOG_WARN)) \
std::clog << ::nfd::Logger::now() << " WARNING: " \
<< "[" << g_logger << "] " << expression << "\n"; \
} while (false)
#define NFD_LOG_FATAL(expression) \
do { \
std::clog << ::nfd::Logger::now() << " FATAL: " \
<< "[" << g_logger << "] " << expression << "\n"; \
} while (false)
} //namespace nfd
#endif