2023-09-03 00:53:48 +00:00
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# nim-raft
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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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2023-09-03 17:52:35 +00:00
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2023-09-03 00:53:48 +00:00
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import asyncdispatch
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2023-09-03 17:52:35 +00:00
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import std/times
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2023-09-03 00:53:48 +00:00
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template awaitWithTimeout[T](operation: Future[T],
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deadline: Future[void],
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onTimeout: untyped): T =
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let f = operation
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await f or deadline
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if not f.finished:
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# If we don't wait for for the cancellation here, it's possible that
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# the "next" operation will run concurrently to this one, messing up
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# the order of operations (since await/async is not fair)
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await cancelAndWait(f)
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onTimeout
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else:
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f.read
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template awaitWithTimeout[T](operation: Future[T],
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timeout: Duration,
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onTimeout: untyped): T =
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awaitWithTimeout(operation, sleepAsync(timeout), onTimeout)
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template awaitWithTimeout(operation: Future[void],
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deadline: Future[void],
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onTimeout: untyped) =
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let f = operation
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await f or deadline
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if not f.finished:
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# If we don't wait for for the cancellation here, it's possible that
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# the "next" operation will run concurrently to this one, messing up
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# the order of operations (since await/async is not fair)
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await cancelAndWait(f)
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onTimeout
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template awaitWithTimeout(operation: Future[void],
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timeout: Duration,
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onTimeout: untyped) =
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awaitWithTimeout(operation, sleepAsync(timeout), onTimeout)
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