0 on success, or -1 with errno set on failure.OsPoller.modifyHandle
int modifyHandle(Handle handle, IoInterest interest, ulong userData, WatcherFlags flags = WatcherFlags.none) @safe nothrow @nogcModify the interest mask and user data for an already-registered handle.
Parameters
handle | Registered handle to update. |
interest | New readiness mask. |
userData | Replacement opaque value. |
flags | Optional watcher flags (reserved for future use). |