int (*rootdir_open_locale)(void *closure, const char *filename, int flags, const char *locale);
int (*queue_job)(void *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout);
void (*vverbose_v2)(void*closure, int level, const char *file, int line, const char * func, const char *fmt, va_list args);
int (*rootdir_open_locale)(void *closure, const char *filename, int flags, const char *locale);
int (*queue_job)(void *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout);
void (*vverbose_v2)(void*closure, int level, const char *file, int line, const char * func, const char *fmt, va_list args);