nr rlc: add enum for rlc mode (am, um, or tm)

openair2/LAYER2/nr_rlc/nr_rlc_entity.c

@@ -110,7 +110,7 @@ nr_rlc_entity_t *new_nr_rlc_entity_am(
   ret->common.max_retx_reached             = max_retx_reached;
   ret->common.max_retx_reached_data        = max_retx_reached_data;
 
-  ret->common.stats.mode = 0;  /* 0 for AM */
+  ret->common.stats.mode = NR_RLC_AM;
 
   /* let's take average over the last 100 milliseconds
    * initial_size of 1024 is arbitrary
@@ -165,7 +165,7 @@ nr_rlc_entity_t *new_nr_rlc_entity_um(
   ret->common.deliver_sdu                  = deliver_sdu;
   ret->common.deliver_sdu_data             = deliver_sdu_data;
 
-  ret->common.stats.mode = 1;  /* 1 for UM */
+  ret->common.stats.mode = NR_RLC_UM;
 
   /* let's take average over the last 100 milliseconds
    * initial_size of 1024 is arbitrary
@@ -205,7 +205,7 @@ nr_rlc_entity_t *new_nr_rlc_entity_tm(
   ret->common.deliver_sdu                  = deliver_sdu;
   ret->common.deliver_sdu_data             = deliver_sdu_data;
 
-  ret->common.stats.mode = 2;  /* 2 for TM */
+  ret->common.stats.mode = NR_RLC_TM;
 
   /* let's take average over the last 100 milliseconds
    * initial_size of 1024 is arbitrary

openair2/LAYER2/nr_rlc/nr_rlc_entity.h

@@ -28,8 +28,14 @@
 
 #define NR_SDU_MAX 16000   /* max NR PDCP SDU size is 9000, let's take more */
 
+typedef enum {
+  NR_RLC_AM,
+  NR_RLC_UM,
+  NR_RLC_TM,
+} nr_rlc_mode_t;
+
 typedef struct {
-  uint32_t  mode;               /* 0: RLC AM, 1: RLC UM, 2: RLC TM */
+  nr_rlc_mode_t mode;          /* AM, UM, or TM */
 
   /* PDU stats */
   /* TX */