36 lines
984 B
Nim
36 lines
984 B
Nim
import pkg/chronos
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import pkg/stew/endians2
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import pkg/upraises
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type
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Clock* = ref object of RootObj
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SecondsSince1970* = int64
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Timeout* = object of CatchableError
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method now*(clock: Clock): SecondsSince1970 {.base, upraises: [].} =
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raiseAssert "not implemented"
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method waitUntil*(clock: Clock, time: SecondsSince1970) {.base,async.} =
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while clock.now() < time:
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await sleepAsync(1.seconds)
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proc withTimeout*(future: Future[void],
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clock: Clock,
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expiry: SecondsSince1970) {.async.} =
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let timeout = clock.waitUntil(expiry)
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try:
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await future or timeout
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finally:
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await timeout.cancelAndWait()
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if not future.completed:
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await future.cancelAndWait()
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raise newException(Timeout, "Timed out")
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proc toBytes*(i: SecondsSince1970): seq[byte] =
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let asUint = cast[uint64](i)
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@(asUint.toBytes)
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proc toSecondsSince1970*(bytes: seq[byte]): SecondsSince1970 =
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let asUint = uint64.fromBytes(bytes)
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cast[int64](asUint)
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