const char *format, va_list args);
SRD_API int srd_log_loglevel_set(int loglevel);
SRD_API int srd_log_loglevel_get(void);
+SRD_API int srd_log_callback_get(srd_log_callback *cb, void **cb_data);
SRD_API int srd_log_callback_set(srd_log_callback cb, void *cb_data);
SRD_API int srd_log_callback_set_default(void);