Here is a list of all variables with links to the files they belong to:

• cout_mutex : connection_pool_demo.cpp
• tests_failed : test_connection_string_builder.cpp, test_database_coordinator.cpp, test_logger_adapter.cpp, test_monitoring_adapter.cpp, test_thread_adapter.cpp, test_unified_database_system.cpp
• tests_passed : test_connection_string_builder.cpp, test_database_coordinator.cpp, test_logger_adapter.cpp, test_monitoring_adapter.cpp, test_thread_adapter.cpp, test_unified_database_system.cpp