Gets the thread-default #GMainContext for this thread, as with
g_main_context_get_thread_default(), but also adds a reference to
it with g_main_context_ref(). In addition, unlike
g_main_context_get_thread_default(), if the thread-default context
is the global default context, this will return that #GMainContext
(with a ref added to it) rather than returning %NULL.
Gets the thread-default #GMainContext for this thread, as with g_main_context_get_thread_default(), but also adds a reference to it with g_main_context_ref(). In addition, unlike g_main_context_get_thread_default(), if the thread-default context is the global default context, this will return that #GMainContext (with a ref added to it) rather than returning %NULL.