update output function and fix segfault

2025-07-14 23:22:04 -06:00
parent c2aa3fb11a
commit 7059385ca1
2 changed files with 19 additions and 9 deletions
@@ -69,11 +69,15 @@ void *output(void *arg) {
  char msg[30];
  while (1) {
    pthread_mutex_lock(&receivemut);
-    ListFirst(receivelist);
-    strcpy(msg, ListCurr(receivelist));
-    ListRemove(receivelist);
+    if (ListCount(receivelist) != 0) {
+      ListFirst(receivelist);
+      strcpy(msg, ListCurr(receivelist));
+      ListRemove(receivelist);
+    }
    pthread_mutex_unlock(&receivemut);
-    printf("%s\n", msg);
+    if (ListCount(receivelist) != 0) {
+      printf("%s\n", msg);
+    }
  }

  return 0;