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028b017d79
This mainly saves spam in test logs, but may save some packets here and there, if nodes are randomly selected twice for GET_NODES and onion routing packets.
107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2018 The TokTok team.
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* Copyright © 2013 Tox project.
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*/
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/**
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* Logger abstraction backed by callbacks for writing.
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*/
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#ifndef C_TOXCORE_TOXCORE_LOGGER_H
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#define C_TOXCORE_TOXCORE_LOGGER_H
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#include <stdint.h>
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#include "attributes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MIN_LOGGER_LEVEL
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#define MIN_LOGGER_LEVEL LOGGER_LEVEL_INFO
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#endif
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// NOTE: Don't forget to update build system files after modifying the enum.
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typedef enum Logger_Level {
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LOGGER_LEVEL_TRACE,
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LOGGER_LEVEL_DEBUG,
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LOGGER_LEVEL_INFO,
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LOGGER_LEVEL_WARNING,
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LOGGER_LEVEL_ERROR,
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} Logger_Level;
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typedef struct Logger Logger;
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typedef void logger_cb(void *context, Logger_Level level, const char *file, int line,
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const char *func, const char *message, void *userdata);
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/**
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* Creates a new logger with logging disabled (callback is NULL) by default.
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*/
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Logger *logger_new(void);
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/**
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* Frees all resources associated with the logger.
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*/
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nullable(1)
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void logger_kill(Logger *log);
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/**
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* Sets the logger callback. Disables logging if set to NULL.
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* The context parameter is passed to the callback as first argument.
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*/
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non_null(1) nullable(2, 3, 4)
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void logger_callback_log(Logger *log, logger_cb *function, void *context, void *userdata);
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/** @brief Main write function. If logging is disabled, this does nothing.
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*
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* If the logger is NULL and `NDEBUG` is not defined, this writes to stderr.
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* This behaviour should not be used in production code, but can be useful for
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* temporarily debugging a function that does not have a logger available. It's
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* essentially `fprintf(stderr, ...)`, but with source location.
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*
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* If `NDEBUG` is defined, the NULL logger does nothing.
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*/
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non_null(3, 5, 6) nullable(1) GNU_PRINTF(6, 7)
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void logger_write(
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const Logger *log, Logger_Level level, const char *file, int line, const char *func,
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const char *format, ...);
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/* @brief Terminate the program with a signal. */
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void logger_abort(void);
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#define LOGGER_WRITE(log, level, ...) \
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do { \
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if (level >= MIN_LOGGER_LEVEL) { \
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logger_write(log, level, __FILE__, __LINE__, __func__, __VA_ARGS__); \
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} \
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} while (0)
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/* To log with an logger */
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#define LOGGER_TRACE(log, ...) LOGGER_WRITE(log, LOGGER_LEVEL_TRACE, __VA_ARGS__)
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#define LOGGER_DEBUG(log, ...) LOGGER_WRITE(log, LOGGER_LEVEL_DEBUG, __VA_ARGS__)
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#define LOGGER_INFO(log, ...) LOGGER_WRITE(log, LOGGER_LEVEL_INFO, __VA_ARGS__)
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#define LOGGER_WARNING(log, ...) LOGGER_WRITE(log, LOGGER_LEVEL_WARNING, __VA_ARGS__)
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#define LOGGER_ERROR(log, ...) LOGGER_WRITE(log, LOGGER_LEVEL_ERROR, __VA_ARGS__)
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#define LOGGER_FATAL(log, ...) \
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do { \
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LOGGER_ERROR(log, __VA_ARGS__); \
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logger_abort(); \
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} while (0)
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#define LOGGER_ASSERT(log, cond, ...) \
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do { \
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if (!(cond)) { \
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LOGGER_ERROR(log, "Assertion failed"); \
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LOGGER_FATAL(log, __VA_ARGS__); \
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} \
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} while (0)
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // C_TOXCORE_TOXCORE_LOGGER_H
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