USRP Hardware Driver and USRP Manual: uhd::log Namespace Reference

| USRP Hardware Driver and USRP Manual Version: 4.9.0.makepkg-0-g9ec1f582 UHD and USRP Manual |

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uhd::log Namespace Reference

## Classes
struct | logging_info

## Typedefs
typedef std::function< void(const uhd::log::logging_info &)> | log_fn_t

## Enumerations
enum | severity_level { trace = 0 , debug = 1 , info = 2 , warning = 3 , error = 4 , fatal = 5 , off = 6 }

## Functions
boost::optional< uhd::log::severity_level > UHD_API | parse_log_level_from_string (const std::string &log_level_str)
UHD_API void | set_log_level (uhd::log::severity_level level)
UHD_API void | set_console_level (uhd::log::severity_level level)
UHD_API void | set_file_level (uhd::log::severity_level level)
UHD_API void | set_logger_level (const std::string &logger, uhd::log::severity_level level)
UHD_API void | add_logger (const std::string &key, log_fn_t logger_fn)

## Typedef Documentation

## ◆ log_fn_t

typedef std::function<void(const uhd::log::logging_info&)> uhd::log::log_fn_t

Logging function type

Every logging_backend has to define a function with this signature. Can be added to the logging core.

## Enumeration Type Documentation

## ◆ severity_level

enum uhd::log::severity_level

Logging severity levels

Either numeric value or string can be used to define loglevel in CMake and environment variables

Enumerator
trace | displays every available log message
debug | displays most log messages necessary for debugging internals
info | informational messages about setup and what is going on
warning | something is not right but operation can continue
error | something has gone wrong
fatal | something has gone horribly wrong
off | logging is turned off

## Function Documentation

## ◆ add_logger()

UHD_API void uhd::log::add_logger | ( | const std::string & | key,
|  | log_fn_t | logger_fn )

Add logging backend to the log system

Parameters

  key | Identifies the logging backend in the logging core
  logger_fn | function which actually logs messages to this backend

## ◆ parse_log_level_from_string()

boost::optional< uhd::log::severity_level > UHD_API uhd::log::parse_log_level_from_string | ( | const std::string & | log_level_str | ) |

Parses a severity_level from a string. If a value could not be parsed, returns none.

## ◆ set_console_level()

UHD_API void uhd::log::set_console_level | ( | uhd::log::severity_level | level | ) |

Set the log level for the console logger (if defined).

Short-hand for set_logger_level("console", level);

## ◆ set_file_level()

UHD_API void uhd::log::set_file_level | ( | uhd::log::severity_level | level | ) |

Set the log level for the file logger (if defined)

Short-hand for set_logger_level("file", level);

## ◆ set_log_level()

UHD_API void uhd::log::set_log_level | ( | uhd::log::severity_level | level | ) |

Set the global log level

The global log level gets applied before the specific log level. So, if the global log level is 'info', no logger can print messages at level 'debug' or below.

## ◆ set_logger_level()

UHD_API void uhd::log::set_logger_level | ( | const std::string & | logger,
|  | uhd::log::severity_level | level )

Set the log level for any specific logger.

Parameters

  logger | Name of the logger
  level | New log level for this logger.

Exceptions

  uhd::key_error | if `logger` was not defined