Fix a data race in the simulate_rf global variable.

srsue/src/main.cc

@@ -34,7 +34,7 @@
 #include <sys/mman.h>
 #include <unistd.h>
 
-extern bool simulate_rlf;
+extern std::atomic<bool> simulate_rlf;
 
 using namespace std;
 using namespace srsue;
@@ -639,7 +639,7 @@ static void* input_loop(void*)
           metrics_screen->toggle_print(do_metrics);
         }
       } else if (key == "rlf") {
-        simulate_rlf = true;
+        simulate_rlf.store(true, std::memory_order_relaxed);
         cout << "Sending Radio Link Failure" << endl;
       } else if (key == "q") {
         // let the signal handler do the job

srsue/src/stack/rrc/rrc.cc

@@ -32,7 +32,7 @@
 #include <numeric>
 #include <string.h>
 
-bool simulate_rlf = false;
+std::atomic<bool> simulate_rlf{false};
 
 using namespace srsran;
 using namespace asn1::rrc;
@@ -203,9 +203,9 @@ void rrc::run_tti()
     return;
   }
 
-  if (simulate_rlf) {
+  if (simulate_rlf.load(std::memory_order_relaxed)) {
     radio_link_failure_process();
-    simulate_rlf = false;
+    simulate_rlf.store(false, std::memory_order_relaxed);
   }
 
   // Process pending PHY measurements in IDLE/CONNECTED