eMBMS: adding mutex to mbsfn configuration in the eNodeB

srsenb/hdr/phy/phy_common.h

@@ -301,6 +301,7 @@ private:
 
   bool                    have_mtch_stop   = false;
   std::mutex              mtch_mutex;
+  std::mutex              mbsfn_mutex;
   std::condition_variable mtch_cvar;
   srsran::phy_cfg_mbsfn_t mbsfn            = {};
   bool                    sib13_configured = false;

srsenb/src/phy/phy_common.cc

@@ -60,9 +60,12 @@ bool phy_common::init(const phy_cell_cfg_list_t&    cell_list_,
   if (!cell_list_lte.empty()) {
     ue_db.init(stack, params, cell_list_lte);
   }
-  if (mcch_configured) {
-    build_mch_table();
-    build_mcch_table();
+  {
+    std::lock_guard<std::mutex> lock(mbsfn_mutex);
+    if (mcch_configured) {
+      build_mch_table();
+      build_mcch_table();
+    }
   }
 
   reset();
@@ -168,6 +171,7 @@ void phy_common::set_mch_period_stop(uint32_t stop)
 
 void phy_common::configure_mbsfn(srsran::phy_cfg_mbsfn_t* cfg)
 {
+  std::lock_guard<std::mutex> lock(mbsfn_mutex);
   mbsfn            = *cfg;
   sib13_configured = true;
   mcch_configured  = true;