cv::utils::logging::internal namespace

Core functionality » Utility and system functions and macros » Logging facilities

Typedef Documentation

WriteLogMessageExFuncType

typedef void (*cv::utils::logging::internal::WriteLogMessageExFuncType)(LogLevel, const char*, const char*, int, const char*, const char*)

Function pointer type for writeLogMessageEx. Used by replaceWriteLogMessageEx.

WriteLogMessageFuncType

typedef void (*cv::utils::logging::internal::WriteLogMessageFuncType)(LogLevel, const char*)

Function pointer type for writeLogMessage. Used by replaceWriteLogMessage.

Function Documentation

getGlobalLogTag()

cv::utils::logging::LogTag *cv::utils::logging::internal::getGlobalLogTag()

Get global log tag

replaceWriteLogMessage()

void cv::utils::logging::internal::replaceWriteLogMessage(WriteLogMessageFuncType f)

Replaces the OpenCV writeLogMessage function with a user-defined function.

Note

The user-defined function must have the same signature as writeLogMessage.

Note

The user-defined function must accept arguments that can be potentially null.

Note

The user-defined function must be thread-safe, as OpenCV logging may be called from multiple threads.

Note

The user-defined function must not perform any action that can trigger deadlocks or infinite loop. Many OpenCV functions are not re-entrant.

Note

Once replaced, logs will not go through the OpenCV writeLogMessage function.

Note

To restore, call this function with a nullptr.

replaceWriteLogMessageEx()

void cv::utils::logging::internal::replaceWriteLogMessageEx(WriteLogMessageExFuncType f)

Replaces the OpenCV writeLogMessageEx function with a user-defined function.

Note

The user-defined function must have the same signature as writeLogMessageEx.

Note

The user-defined function must accept arguments that can be potentially null.

Note

The user-defined function must be thread-safe, as OpenCV logging may be called from multiple threads.

Note

The user-defined function must not perform any action that can trigger deadlocks or infinite loop. Many OpenCV functions are not re-entrant.

Note

Once replaced, logs will not go through any of the OpenCV logging functions such as writeLogMessage or writeLogMessageEx, until their respective restore methods are called.

Note

To restore, call this function with a nullptr.

writeLogMessage()

void cv::utils::logging::internal::writeLogMessage(LogLevel logLevel, const char *message)

Write log message

writeLogMessageEx()

void cv::utils::logging::internal::writeLogMessageEx(LogLevel logLevel, const char *tag, const char *file, int line, const char *func, const char *message)

Write log message