int lttng_ust_safe_close_fd(int fd, int (*close_cb)(int));
int lttng_ust_safe_fclose_stream(FILE *stream, int (*fclose_cb)(FILE *stream));
int lttng_ust_safe_close_fd(int fd, int (*close_cb)(int));
int lttng_ust_safe_fclose_stream(FILE *stream, int (*fclose_cb)(FILE *stream));