0 when io_uring is active, otherwise the saved errno value from
the failed setup attempt.
OsPoller.probeError
int probeError() @property const pure @safe nothrow @nogcReturn the last io_uring setup error.
int probeError() @property const pure @safe nothrow @nogcReturn the last io_uring setup error.
0 when io_uring is active, otherwise the saved errno value from
the failed setup attempt.