lokinet/llarp/util/logging/logger.hpp
Thomas Winget 7caa87862e standardize include format and pragma once
All #ifndef guards on headers have been removed, I think,
in favor of #pragma once

Headers are now included as `#include "filename"` if the included file
resides in the same directory as the file including it, or any
subdirectory therein.  Otherwise they are included as
`#include <project/top/dir/relative/path/filename>`

The above does not include system/os headers.
2021-03-09 19:01:41 -05:00

117 lines
3.5 KiB
C++

#pragma once
#include <memory>
#include <llarp/util/time.hpp>
#include "logstream.hpp"
#include "logger_internal.hpp"
namespace llarp
{
enum class LogType
{
Unknown = 0,
File,
Json,
Syslog,
};
LogType
LogTypeFromString(const std::string&);
struct LogContext
{
using IOFunc_t = std::function<void(void)>;
LogContext();
LogLevel curLevel = eLogInfo;
LogLevel startupLevel = eLogInfo;
LogLevel runtimeLevel = eLogInfo;
ILogStream_ptr logStream;
std::string nodeName = "lokinet";
const llarp_time_t started;
static LogContext&
Instance();
void
DropToRuntimeLevel();
void
RevertRuntimeLevel();
/// A blocking call that will not return until any existing log functions have flushed.
/// Should only be called in rare circumstances, such as when the program is about to exit.
void
ImmediateFlush();
/// Initialize the logging system.
///
/// @param level is the new log level (below which log statements will be ignored)
/// @param type is the type of logger to set up
/// @param file is the file to log to (relevant for types File and Json)
/// @param nickname is a tag to add to each log statement
/// @param io is a callable that queues work that does io, async
void
Initialize(
LogLevel level,
LogType type,
const std::string& file,
const std::string& nickname,
std::function<void(IOFunc_t)> io);
};
/// RAII type to turn logging off
/// logging is suppressed as long as the silencer is in scope
struct LogSilencer
{
LogSilencer();
~LogSilencer();
explicit LogSilencer(LogContext& ctx);
private:
LogContext& parent;
ILogStream_ptr stream;
};
void
SetLogLevel(LogLevel lvl);
LogLevel
GetLogLevel();
/** internal */
template <typename... TArgs>
inline static void
_Log(LogLevel lvl, const char* fname, int lineno, TArgs&&... args) noexcept
{
auto& log = LogContext::Instance();
if (log.curLevel > lvl || log.logStream == nullptr)
return;
std::stringstream ss;
LogAppend(ss, std::forward<TArgs>(args)...);
log.logStream->AppendLog(lvl, fname, lineno, log.nodeName, ss.str());
}
} // namespace llarp
#define LogTrace(...) _Log(llarp::eLogTrace, LOG_TAG, __LINE__, __VA_ARGS__)
#define LogDebug(...) _Log(llarp::eLogDebug, LOG_TAG, __LINE__, __VA_ARGS__)
#define LogInfo(...) _Log(llarp::eLogInfo, LOG_TAG, __LINE__, __VA_ARGS__)
#define LogWarn(...) _Log(llarp::eLogWarn, LOG_TAG, __LINE__, __VA_ARGS__)
#define LogError(...) _Log(llarp::eLogError, LOG_TAG, __LINE__, __VA_ARGS__)
#define LogTraceTag(tag, ...) _Log(llarp::eLogTrace, tag, __LINE__, __VA_ARGS__)
#define LogDebugTag(tag, ...) _Log(llarp::eLogDebug, tag, __LINE__, __VA_ARGS__)
#define LogInfoTag(tag, ...) _Log(llarp::eLogInfo, tag, __LINE__, __VA_ARGS__)
#define LogWarnTag(tag, ...) _Log(llarp::eLogWarn, tag, __LINE__, __VA_ARGS__)
#define LogErrorTag(tag, ...) _Log(llarp::eLogError, tag, __LINE__, __VA_ARGS__)
#define LogTraceExplicit(tag, line, ...) _Log(llarp::eLogTrace, tag, line, __VA_ARGS__)
#define LogDebugExplicit(tag, line, ...) _Log(llarp::eLogDebug, tag, line, __VA_ARGS__)
#define LogInfoExplicit(tag, line, ...) _Log(llarp::eLogInfo, tag, line __VA_ARGS__)
#define LogWarnExplicit(tag, line, ...) _Log(llarp::eLogWarn, tag, line, __VA_ARGS__)
#define LogErrorExplicit(tag, line, ...) _Log(llarp::eLogError, tag, line, __VA_ARGS__)
#ifndef LOG_TAG
#define LOG_TAG "default"
#endif