implementation of RAR response window timer suspension

(this is needed because it might expire while MSG2 is being decoded despite being received inside the window)

common/utils/nr/nr_common.c

@@ -1380,15 +1380,22 @@ int set_default_nta_offset(frequency_range_t freq_range, uint32_t samples_per_su
 void nr_timer_start(NR_timer_t *timer)
 {
   timer->active = true;
+  timer->suspended = false;
   timer->counter = 0;
 }
 
 void nr_timer_stop(NR_timer_t *timer)
 {
   timer->active = false;
+  timer->suspended = false;
   timer->counter = 0;
 }
 
+void nr_timer_suspension(NR_timer_t *timer)
+{
+  timer->suspended = !timer->suspended;
+}
+
 bool nr_timer_is_active(const NR_timer_t *timer)
 {
   return timer->active;
@@ -1399,7 +1406,7 @@ bool nr_timer_tick(NR_timer_t *timer)
   bool expired = false;
   if (timer->active) {
     timer->counter += timer->step;
-    if (timer->target == UINT_MAX) // infinite target, never expires
+    if (timer->target == UINT_MAX || timer->suspended) // infinite target, never expires
       return false;
     expired = nr_timer_expired(timer);
     if (expired)
@@ -1410,7 +1417,7 @@ bool nr_timer_tick(NR_timer_t *timer)
 
 bool nr_timer_expired(const NR_timer_t *timer)
 {
-  if (timer->target == UINT_MAX) // infinite target, never expires
+  if (timer->target == UINT_MAX || timer->suspended) // infinite target, never expires
     return false;
   return timer->counter >= timer->target;
 }

common/utils/nr/nr_common.h

@@ -156,6 +156,7 @@ typedef struct {
 
 typedef struct {
   bool active;
+  bool suspended;
   uint32_t counter;
   uint32_t target;
   uint32_t step;
@@ -171,6 +172,12 @@ void nr_timer_start(NR_timer_t *timer);
  * @param timer Timer to stopped
  */
 void nr_timer_stop(NR_timer_t *timer);
+/**
+ * @brief To suspend/resume a timer
+ * @param timer Timer to be stopped/suspended
+ */
+void nr_timer_suspension(NR_timer_t *timer);
+
 /**
  * @brief If active, it increases timer counter by an amout of units equal to step. It stops timer if expired
  * @param timer Timer to be handled