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Added debug code for futures.

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This commit is contained in:
Dominik Picheta 2014-07-14 21:00:51 +01:00
commit 41bb0bf9dc
1 changed files with 19 additions and 3 deletions
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22
lib/pure/asyncdispatch.nim
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@ -41,6 +41,7 @@ type
cb: proc () {.closure,gcsafe.} cb: proc () {.closure,gcsafe.}
finished: bool finished: bool
error*: ref EBase error*: ref EBase
stackTrace: string ## For debugging purposes only.
PFuture*[T] = ref object of PFutureBase PFuture*[T] = ref object of PFutureBase
value: T value: T
@ -49,10 +50,23 @@ proc newFuture*[T](): PFuture[T] =
## Creates a new future. ## Creates a new future.
new(result) new(result)
result.finished = false result.finished = false
result.stackTrace = getStackTrace()
proc checkFinished[T](future: PFuture[T]) =
if future.finished:
echo("<----->")
echo(future.stackTrace)
echo("-----")
when T is string:
echo("Contents: ", future.value.repr)
echo("<----->")
echo("Future already finished, cannot finish twice.")
assert false
proc complete*[T](future: PFuture[T], val: T) = proc complete*[T](future: PFuture[T], val: T) =
## Completes ``future`` with value ``val``. ## Completes ``future`` with value ``val``.
assert(not future.finished, "Future already finished, cannot finish twice.") #assert(not future.finished, "Future already finished, cannot finish twice.")
checkFinished(future)
assert(future.error == nil) assert(future.error == nil)
future.value = val future.value = val
future.finished = true future.finished = true
@ -61,7 +75,8 @@ proc complete*[T](future: PFuture[T], val: T) =
proc complete*(future: PFuture[void]) = proc complete*(future: PFuture[void]) =
## Completes a void ``future``. ## Completes a void ``future``.
assert(not future.finished, "Future already finished, cannot finish twice.") #assert(not future.finished, "Future already finished, cannot finish twice.")
checkFinished(future)
assert(future.error == nil) assert(future.error == nil)
future.finished = true future.finished = true
if future.cb != nil: if future.cb != nil:
@ -69,7 +84,8 @@ proc complete*(future: PFuture[void]) =
proc fail*[T](future: PFuture[T], error: ref EBase) = proc fail*[T](future: PFuture[T], error: ref EBase) =
## Completes ``future`` with ``error``. ## Completes ``future`` with ``error``.
assert(not future.finished, "Future already finished, cannot finish twice.") #assert(not future.finished, "Future already finished, cannot finish twice.")
checkFinished(future)
future.finished = true future.finished = true
future.error = error future.error = error
if future.cb != nil: if future.cb != nil: