Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos

[fw/altos] / src / kernel / ao.h

diff --git a/src/kernel/ao.h b/src/kernel/ao.h
index 244421f31f1d41b25d431d6165036a80da067425..16d600aa08b46319767ebc550e72b7efcb84fdba 100644 (file)
--- a/src/kernel/ao.h
+++ b/src/kernel/ao.h
@@ -43,10 +43,6 @@
 #define HAS_TASK       1
 #endif
 
-#ifndef AO_PORT_TYPE
-#define AO_PORT_TYPE uint8_t
-#endif
-
 typedef AO_PORT_TYPE ao_port_t;
 
 #if HAS_TASK
@@ -656,6 +652,7 @@ union ao_monitor {
 extern __xdata union ao_monitor ao_monitor_ring[AO_MONITOR_RING];
 
 #define ao_monitor_ring_next(n)        (((n) + 1) & (AO_MONITOR_RING - 1))
+#define ao_monitor_ring_prev(n)        (((n) - 1) & (AO_MONITOR_RING - 1))
 
 extern __data uint8_t ao_monitoring;
 extern __data uint8_t ao_monitor_head;