63 lines
1.8 KiB
Nim
63 lines
1.8 KiB
Nim
# this module will be further extended in PR
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# https://github.com/status-im/nim-libp2p/pull/107/
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import chronos
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import chronicles
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import macros
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# could not figure how to make it with a simple template
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# sadly nim needs more love for hygenic templates
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# so here goes the macro, its based on the proc/template version
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# and uses quote do so it's quite readable
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macro checkFutures*[T](futs: seq[Future[T]], exclude: untyped = []): untyped =
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let nexclude = exclude.len
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case nexclude
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of 0:
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quote do:
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for res in `futs`:
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if res.failed:
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let exc = res.readError()
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# We still don't abort but warn
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warn "Something went wrong in a future", error=exc.name, msg = exc.msg
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else:
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quote do:
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for res in `futs`:
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block check:
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if res.failed:
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let exc = res.readError()
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for i in 0..<`nexclude`:
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if exc of `exclude`[i]:
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trace "Ignoring an error (no warning)", error=exc.name, msg = exc.msg
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break check
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# We still don't abort but warn
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warn "Something went wrong in a future", error=exc.name, msg = exc.msg
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proc allFuturesThrowing*[T](args: varargs[Future[T]]): Future[void] =
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var futs: seq[Future[T]]
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for fut in args:
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futs &= fut
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proc call() {.async.} =
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var first: ref Exception = nil
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futs = await allFinished(futs)
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for fut in futs:
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if fut.failed:
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let err = fut.readError()
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if err of Defect:
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raise err
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else:
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if isNil(first):
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first = err
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if not isNil(first):
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raise first
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return call()
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template tryAndWarn*(msg: static[string]; body: untyped): untyped =
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try:
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body
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except CancelledError as ex:
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raise ex
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except CatchableError as ex:
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warn "ignored an error", name=ex.name, msg=msg
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