#define LOGGER_INFO 6 /* informational */
#define LOGGER_DEBUG 7 /* debug-level messages */
-typedef void (*logger_callback_t)(int level, const char *msg);
+typedef void (*logger_callback_t)(void *cls, int level, const char *msg);
typedef struct logger_s logger_t;
void logger_destroy(logger_t *logger);
void logger_set_level(logger_t *logger, int level);
-void logger_set_callback(logger_t *logger, logger_callback_t callback);
+void logger_set_callback(logger_t *logger, logger_callback_t callback, void *cls);
void logger_log(logger_t *logger, int level, const char *fmt, ...);