add a function to reset the transmission timestamps chain, and use it in context of UE resynchronization

executables/nr-ue.c

@@ -829,6 +829,7 @@ void *UE_thread(void *arg)
     if (start_rx_stream == 0) {
       start_rx_stream=1;
       syncInFrame(UE, &sync_timestamp, intialSyncOffset);
+      openair0_write_reorder_clear_context(&UE->rfdevice);
       shiftForNextFrame = 0; // will be used to track clock drift
       // read in first symbol
       AssertFatal(UE->frame_parms.ofdm_symbol_size + UE->frame_parms.nb_prefix_samples0

radio/COMMON/common_lib.c

@@ -269,3 +269,20 @@ int openair0_write_reorder(openair0_device *device, openair0_timestamp timestamp
   }
   return nsamps;
 }
+
+void openair0_write_reorder_clear_context(openair0_device *device)
+{
+  LOG_I(HW, "received write reorder clear context\n");
+  re_order_t *ctx = &device->reOrder;
+  if (!ctx->initDone)
+    return;
+  if (pthread_mutex_trylock(&ctx->mutex_write) == 0)
+    LOG_E(HW, "write_reorder_clear_context call while still writing on the device\n");
+  pthread_mutex_destroy(&ctx->mutex_write);
+  pthread_mutex_lock(&ctx->mutex_store);
+  for (int i = 0; i < WRITE_QUEUE_SZ; i++)
+    ctx->queue[i].active = false;
+  pthread_mutex_unlock(&ctx->mutex_store);
+  pthread_mutex_destroy(&ctx->mutex_store);
+  ctx->initDone = false;
+}

radio/COMMON/common_lib.h

@@ -671,7 +671,7 @@ extern int read_recplayconfig(recplay_conf_t **recplay_conf, recplay_state_t **r
 extern void iqrecorder_end(openair0_device *device);
 
 int openair0_write_reorder(openair0_device *device, openair0_timestamp timestamp, void **txp, int nsamps, int nbAnt, int flags);
-
+void openair0_write_reorder_clear_context(openair0_device *device);
 #include <unistd.h>
 #ifndef gettid
 #define gettid() syscall(__NR_gettid)