+ if (test_sync == TEST_SYNC_NONE && nr_dequeuers > 1 && test_pop) {
+ if (test_force_sync) {
+ fprintf(stderr, "[WARNING] Using pop concurrently "
+ "with other pop or pop_all without external "
+ "synchronization. Expect run-time failure.\n");
+ } else {
+ printf("Enforcing mutex synchronization\n");
+ test_sync = TEST_SYNC_MUTEX;
+ }
+ }
+