nim-dagger/codex/clock.nim

26 lines
693 B
Nim

import pkg/chronos
type
Clock* = ref object of RootObj
SecondsSince1970* = int64
Timeout* = object of CatchableError
method now*(clock: Clock): SecondsSince1970 {.base.} =
raiseAssert "not implemented"
proc waitUntil*(clock: Clock, time: SecondsSince1970) {.async.} =
while clock.now() < time:
await sleepAsync(1.seconds)
proc withTimeout*(future: Future[void],
clock: Clock,
expiry: SecondsSince1970) {.async.} =
let timeout = clock.waitUntil(expiry)
try:
await future or timeout
finally:
await timeout.cancelAndWait()
if not future.completed:
await future.cancelAndWait()
raise newException(Timeout, "Timed out")