Function get_current_except_priority 

pub fn get_current_except_priority(
    ignore_priority: i32,
) -> Option<(SystemTime, i32)>

Get the current time, querying only providers other than the one at ignore_priority.

C parity: epicsGeneralTime.c:106-151 generalTimeGetExceptPriority. Used by a time provider (typically an NTP/clock provider) that needs to read “the best time other than mine” to validate its own sync without recursing into itself.

Returns (time, priority_used) — the priority of the provider that answered — or None when no other provider succeeded. No ratchet is applied: this query may legitimately go backwards, exactly as the C function documents (“No ratchet, time from this routine may go backwards”).

ignore_priority follows the C convention: a positive value skips the provider at that priority; a negative value -n skips every provider except the one at priority n.