cycle timers: Added avr_cycle_timer_status()

Allows verification wether a timer is running, and
until when it is.

Signed-off-by: Michel Pollet <buserror@gmail.com>

diff --git a/simavr/sim/sim_cycle_timers.c b/simavr/sim/sim_cycle_timers.c
index f2161d9..fed6b6c 100644 (file)
--- a/simavr/sim/sim_cycle_timers.c
+++ b/simavr/sim/sim_cycle_timers.c
@@ -63,6 +63,26 @@ void avr_cycle_timer_cancel(avr_t * avr, avr_cycle_timer_t timer, void * param)
                }
 }
 
+/*
+ * Check to see if a timer is present, if so, return the number (+1) of
+ * cycles left for it to fire, and if not present, return zero
+ */
+avr_cycle_count_t
+avr_cycle_timer_status(avr_t * avr, avr_cycle_timer_t timer, void * param)
+{
+       if (!avr->cycle_timer_map)
+               return 0;
+
+       for (int i = 0; i < 32; i++)
+               if ((avr->cycle_timer_map & (1 << i)) &&
+                               avr->cycle_timer[i].timer == timer &&
+                               avr->cycle_timer[i].param == param) {
+                       return 1 + (avr->cycle_timer[i].when - avr->cycle);
+               }
+
+       return 0;
+}
+
 /*
  * run thru all the timers, call the ones that needs it,
  * clear the ones that wants it, and calculate the next

diff --git a/simavr/sim/sim_cycle_timers.h b/simavr/sim/sim_cycle_timers.h
index 49a9851..a7c9d41 100644 (file)
--- a/simavr/sim/sim_cycle_timers.h
+++ b/simavr/sim/sim_cycle_timers.h
@@ -53,6 +53,12 @@ void avr_cycle_timer_register(avr_t * avr, avr_cycle_count_t when, avr_cycle_tim
 void avr_cycle_timer_register_usec(avr_t * avr, uint32_t when, avr_cycle_timer_t timer, void * param);
 // cancel a previously set timer
 void avr_cycle_timer_cancel(avr_t * avr, avr_cycle_timer_t timer, void * param);
+/*
+ * Check to see if a timer is present, if so, return the number (+1) of
+ * cycles left for it to fire, and if not present, return zero
+ */
+avr_cycle_count_t
+avr_cycle_timer_status(avr_t * avr, avr_cycle_timer_t timer, void * param);
 
 
 //