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Implements or and and for futures. Ref #1487.

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Dominik Picheta
2014-08-19 20:54:12 +01:00
parent 9c0d25dc94
commit a0b2fb5bd7
1 changed files with 21 additions and 0 deletions
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21
lib/pure/asyncdispatch.nim
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@@ -180,6 +180,27 @@ proc asyncCheck*[T](future: PFuture[T]) =
echoOriginalStackTrace(future)
raise future.error
proc `and`*[T, Y](fut1: PFuture[T], fut2: PFuture[Y]): PFuture[void] =
## Returns a future which will complete once both ``fut1`` and ``fut2``
## complete.
var retFuture = newFuture[void]()
fut1.callback =
proc () =
if fut2.finished: retFuture.complete()
fut2.callback =
proc () =
if fut1.finished: retFuture.complete()
return retFuture
proc `or`*[T, Y](fut1: PFuture[T], fut2: PFuture[Y]): PFuture[void] =
## Returns a future which will complete once either ``fut1`` or ``fut2``
## complete.
var retFuture = newFuture[void]()
proc cb() =
if not retFuture.finished: retFuture.complete()
fut1.callback = cb
fut2.callback = cb
type
PDispatcherBase = ref object of PObject
timers: seq[tuple[finishAt: float, fut: PFuture[void]]]