Debug mode option to error on evthread init AFTER other event calls. - A handy event_enable_debug_mode() feature which will error and abort the application if any thread-aware libevent functions are called BEFORE the evthread API has been initialized (manually, or through evthread_use_windows_threads() / evthread_use_pthreads() - This is done by setting the global debug variable 'event_debug_created_threadable_ctx_' whenever the following functions are called: evthreadimpl_lock_alloc_() evthreadimpl_cond_alloc_() event_base_new_with_config() <- this checks to see if the thread callbacks are enabled first, so we have to manually set the variable. - Example: int main(int argc, char ** argv) { struct event_base * base; event_enable_debug_mode(); base = event_base_new(); evthread_use_pthreads(); return 0; } When executed, the program will throw an error and exit: [err] evthread initialization must be called BEFORE anything else!