#endif
#include <time.h>
+#include <fcntl.h>
+
+#define TFD_NONBLOCK O_NONBLOCK
+#define TFD_CLOEXEC O_CLOEXEC
+
+#define TFD_TIMER_ABSTIME 1
+#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
+
+struct itimerspec;
int timerfd_create(int, int);
int timerfd_settime(int, int, const struct itimerspec *, struct itimerspec *);