36 lines
1.0 KiB
Nim
36 lines
1.0 KiB
Nim
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# Nim-Libp2p
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# Copyright (c) 2023 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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# * MIT license ([LICENSE-MIT](LICENSE-MIT))
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# at your option.
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# This file may not be copied, modified, or distributed except according to
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# those terms.
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when (NimMajor, NimMinor) < (1, 4):
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{.push raises: [Defect].}
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else:
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{.push raises: [].}
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import chronos
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type
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AllFuturesFailedError* = object of CatchableError
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proc anyCompleted*[T](futs: seq[Future[T]]): Future[Future[T]] {.async.} =
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## Returns a future that will complete with the first future that completes.
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## If all futures fail or futs is empty, the returned future will fail with AllFuturesFailedError.
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var requests = futs
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while true:
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if requests.len == 0:
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raise newException(AllFuturesFailedError, "None of the futures completed successfully")
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var raceFut = await one(requests)
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if raceFut.completed:
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return raceFut
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let index = requests.find(raceFut)
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requests.del(index)
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