Log

This module is not thread-safe in the MSVC.

Header file

#include "mln_log.h"

Module

log

Functions

mln_log_init

int mln_log_init(mln_conf_t *cf);

Description: Initialize global log module. If cf is NULL, log will be initialized with Melon configuration file. Otherwise, log will be initialized with given cf.

Return value: 0 on success, otherwise -1 returned

mln_log

enum log_level {
    none,
    report,
    debug,
    warn,
    error
};

void _mln_sys_log(enum log_level level, const char *file, const char *func, int line, char *msg, ...);

#define mln_log(err_lv,msg,...) _mln_sys_log(err_lv, __FILE__, __FUNCTION__, __LINE__, msg, ## __VA_ARGS__)

Description:

In daily development, the macro mln_log is often used, which will append the file, function, and line number of the output log by itself.

The logs are divided into 5 levels, and the levels increase sequentially from top to bottom. In the configuration file, there is a configuration item used to control the level of output logs, logs below this level will not be output:

log_level "none";

Defaults to the lowest level none.

none is different from other levels. Under this level, the content of all log output is completely the content of msg without any prefix information, such as: date, process number, file name, function name, line number Wait.

This function needs to be used after mln_framework_init or its callback function. It will be an error to use it before mln_framework_init, because the log related components have not been initialized at this time.

mln_log_dir_path

char *mln_log_dir_path(void);

Description: Get the path of the directory where the log file is located.

Return value: log directory path string

mln_log_logfile_path

char *mln_log_logfile_path(void);

Description: Get the log file path.

Return value: log file path string

mln_log_pid_path

char *mln_log_pid_path(void);

Description: Get the path of the PID file, which records the process ID of the main process.

Return value: PID file path string

mln_log_logger_set

void mln_log_logger_set(mln_logger_t logger);

typedef void (*mln_logger_t)(mln_log_t *log, mln_log_level_t level, const char *filename, const char *funcname, int line, char *fmt, va_list args);

Description: Set a custom logging function. mln_logger_t is the function prototype, and all parameters are passed in by the log module. args is the variable parameter part.

Return value: None

mln_log_logger_get

mln_logger_t mln_log_logger_get(void);

Description: Get the current log processing function pointer, which can be used to link processing functions when customizing processing functions.

Return value: Returns the current log processing function pointer

示例

#include "mln_log.h"

int main(int argc, char *argv[])
{
    mln_log(debug, "This will be outputted to stderr\n");
    mln_conf_load();
    mln_log_init(NULL);
    mln_log(debug, "This will be outputted to stderr and log file\n");
    return 0;
}

Log

Log