Runs a single iteration for the default GMainContext.
Deprecated since: 2.2
Use g_main_context_iteration() instead.
This function is not directly available to language bindings.
Parameters
may_block
Type:-
Set to TRUE if it should block (i.e. wait) until an event
source becomes ready. It will return after an event source has been
processed. If set to FALSE it will return immediately if no event
source is ready to be processed.