Index: uspace/lib/c/generic/fibril_synch.c
===================================================================
--- uspace/lib/c/generic/fibril_synch.c	(revision 28f8f1707abf5bd47a47210ade9902a498f8a797)
+++ uspace/lib/c/generic/fibril_synch.c	(revision 522a4f9ad06a8eeb4dccbac269ef6834d063a1b3)
@@ -447,4 +447,135 @@
 }
 
+/** Timer fibril.
+ *
+ * @param arg	Timer
+ */
+static int fibril_timer_func(void *arg)
+{
+	fibril_timer_t *timer = (fibril_timer_t *) arg;
+	int rc;
+
+	fibril_mutex_lock(&timer->lock);
+
+	while (true) {
+		while (timer->state != fts_active &&
+		    timer->state != fts_cleanup) {
+
+			if (timer->state == fts_cleanup)
+				break;
+
+			fibril_condvar_wait(&timer->cv, &timer->lock);
+		}
+
+		if (timer->state == fts_cleanup)
+			break;
+
+		rc = fibril_condvar_wait_timeout(&timer->cv, &timer->lock,
+		    timer->delay);
+		if (rc == ETIMEOUT) {
+			timer->state = fts_fired;
+			fibril_mutex_unlock(&timer->lock);
+			timer->fun(timer->arg);
+			fibril_mutex_lock(&timer->lock);
+		}
+	}
+
+	fibril_mutex_unlock(&timer->lock);
+	return 0;
+}
+
+/** Create new timer.
+ *
+ * @return		New timer on success, @c NULL if out of memory.
+ */
+fibril_timer_t *fibril_timer_create(void)
+{
+	fid_t fid;
+	fibril_timer_t *timer;
+
+	timer = calloc(1, sizeof(fibril_timer_t));
+	if (timer == NULL)
+		return NULL;
+
+	fid = fibril_create(fibril_timer_func, (void *) timer);
+	if (fid == 0) {
+		free(timer);
+		return NULL;
+	}
+
+	fibril_mutex_initialize(&timer->lock);
+	fibril_condvar_initialize(&timer->cv);
+
+	timer->fibril = fid;
+	timer->state = fts_not_set;
+
+	fibril_add_ready(fid);
+
+	return timer;
+}
+
+/** Destroy timer.
+ *
+ * @param timer		Timer, must not be active or accessed by other threads.
+ */
+void fibril_timer_destroy(fibril_timer_t *timer)
+{
+	fibril_mutex_lock(&timer->lock);
+	assert(timer->state != fts_active);
+	timer->state = fts_cleanup;
+	fibril_condvar_broadcast(&timer->cv);
+	fibril_mutex_unlock(&timer->lock);
+}
+
+/** Set timer.
+ *
+ * Set timer to execute a callback function after the specified
+ * interval.
+ *
+ * @param timer		Timer
+ * @param delay		Delay in microseconds
+ * @param fun		Callback function
+ * @param arg		Argument for @a fun
+ */
+void fibril_timer_set(fibril_timer_t *timer, suseconds_t delay,
+    fibril_timer_fun_t fun, void *arg)
+{
+	fibril_mutex_lock(&timer->lock);
+	timer->state = fts_active;
+	timer->delay = delay;
+	timer->fun = fun;
+	timer->arg = arg;
+	fibril_condvar_broadcast(&timer->cv);
+	fibril_mutex_unlock(&timer->lock);
+}
+
+/** Clear timer.
+ *
+ * Clears (cancels) timer and returns last state of the timer.
+ * This can be one of:
+ *    - fts_not_set	If the timer has not been set or has been cleared
+ *    - fts_active	Timer was set but did not fire
+ *    - fts_fired	Timer fired
+ *
+ * @param timer		Timer
+ * @return		Last timer state
+ */
+fibril_timer_state_t fibril_timer_clear(fibril_timer_t *timer)
+{
+	fibril_timer_state_t old_state;
+
+	fibril_mutex_lock(&timer->lock);
+	old_state = timer->state;
+	timer->state = fts_not_set;
+
+	timer->delay = 0;
+	timer->fun = NULL;
+	timer->arg = NULL;
+	fibril_condvar_broadcast(&timer->cv);
+	fibril_mutex_unlock(&timer->lock);
+
+	return old_state;
+}
+
 /** @}
  */