altos: Switch all tick variables to AO_TICK_TYPE/AO_TICK_SIGNED

[fw/altos] / src / drivers / ao_event.c

diff --git a/src/drivers/ao_event.c b/src/drivers/ao_event.c
index 5c0d286310f2460f1638227f8ddb8bd87303d083..d9d1d375fcb86f3453e1ea8cae95da62c475d88b 100644 (file)
--- a/src/drivers/ao_event.c
+++ b/src/drivers/ao_event.c
@@ -3,7 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -41,6 +42,22 @@ ao_event_get(struct ao_event *ev)
                );
 }
 
+uint8_t
+ao_event_get_for(struct ao_event *ev, AO_TICK_TYPE timeout)
+{
+       uint8_t empty = 1;
+       ao_arch_critical(
+               while ((empty = ao_event_queue_empty()))
+                       if (ao_sleep_for(&ao_event_queue, timeout))
+                               break;
+               if (!empty) {
+                       *ev = ao_event_queue[ao_event_queue_remove];
+                       ao_event_queue_remove = ao_event_queue_next(ao_event_queue_remove);
+               }
+               );
+       return empty;
+}
+
 /* called with interrupts disabled */
 void
 ao_event_put_isr(uint8_t type, uint8_t unit, int32_t value)