--- title: "mg_mgr_poll()" decl_name: "mg_mgr_poll" symbol_kind: "func" signature: | time_t mg_mgr_poll(struct mg_mgr *, int milli); ---
This function performs the actual IO and must be called in a loop (an event loop). It returns the current timestamp.
`milli` is the maximum number of milliseconds to sleep.
`mg_mgr_poll()` checks all connections for IO readiness. If at least one of the connections is IO-ready, `mg_mgr_poll()` triggers the respective
event handlers and returns.