osrm-backend/src/util/log.cpp

120 lines
2.9 KiB
C++

#include "util/log.hpp"
#include "util/isatty.hpp"
#include <cstdio>
#include <iostream>
#include <mutex>
#include <string>
namespace osrm
{
namespace util
{
namespace
{
static const char COL_RESET[]{"\x1b[0m"};
static const char RED[]{"\x1b[31m"};
static const char YELLOW[]{"\x1b[33m"};
#ifndef NDEBUG
static const char MAGENTA[]{"\x1b[35m"};
#endif
// static const char GREEN[] { "\x1b[32m"};
// static const char BLUE[] { "\x1b[34m"};
// static const char CYAN[] { "\x1b[36m"};
}
void LogPolicy::Unmute() { m_is_mute = false; }
void LogPolicy::Mute() { m_is_mute = true; }
bool LogPolicy::IsMute() const { return m_is_mute; }
LogPolicy &LogPolicy::GetInstance()
{
static LogPolicy runningInstance;
return runningInstance;
}
Log::Log(LogLevel level_, std::ostream &ostream) : level(level_), stream(ostream)
{
const bool is_terminal = IsStdoutATTY();
std::lock_guard<std::mutex> lock(get_mutex());
switch (level)
{
case logWARNING:
stream << (is_terminal ? YELLOW : "") << "[warn] ";
break;
case logERROR:
stream << (is_terminal ? RED : "") << "[error] ";
break;
case logDEBUG:
#ifndef NDEBUG
stream << (is_terminal ? MAGENTA : "") << "[debug] ";
#endif
break;
default: // logINFO:
stream << "[info] ";
break;
}
}
Log::Log(LogLevel level_) : Log(level_, buffer) {}
std::mutex &Log::get_mutex()
{
static std::mutex mtx;
return mtx;
}
/**
* Close down this logging instance.
* This destructor is responsible for flushing any buffered data,
* and printing a newline character (each logger object is responsible for only one line)
* Because sub-classes can replace the `stream` object - we need to verify whether
* we're writing to std::cerr/cout, or whether we should write to the stream
*/
Log::~Log()
{
std::lock_guard<std::mutex> lock(get_mutex());
const bool usestd = (&stream == &buffer);
if (!LogPolicy::GetInstance().IsMute())
{
const bool is_terminal = IsStdoutATTY();
if (usestd)
{
switch (level)
{
case logWARNING:
case logERROR:
std::cerr << buffer.str();
std::cerr << (is_terminal ? COL_RESET : "");
std::cerr << std::endl;
break;
case logDEBUG:
#ifdef NDEBUG
break;
#endif
case logINFO:
default:
std::cout << buffer.str();
std::cout << (is_terminal ? COL_RESET : "");
std::cout << std::endl;
break;
}
}
else
{
stream << (is_terminal ? COL_RESET : "");
stream << std::endl;
}
}
}
UnbufferedLog::UnbufferedLog(LogLevel level_)
: Log(level_, (level_ == logWARNING || level_ == logERROR) ? std::cerr : std::cout)
{
stream.flags(std::ios_base::unitbuf);
}
}
}