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fixes #13781; fixes #14901; add acyclic pragmas to FlowVar (#20804)

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* add acyclic pragmas to FlowVar

* add testcases
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ringabout 2022-11-10 16:54:39 +08:00 • committed by GitHub
commit 2848cdb18a
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2 changed files with 12 additions and 3 deletions
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4
lib/pure/concurrency/threadpool.nim
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@ -102,7 +102,7 @@ type
idx: int
FlowVarBase* = ref FlowVarBaseObj ## Untyped base class for `FlowVar[T] <#FlowVar>`_.
FlowVarBaseObj = object of RootObj
FlowVarBaseObj {.acyclic.} = object of RootObj
ready, usesSemaphore, awaited: bool
cv: Semaphore # for 'blockUntilAny' support
ai: ptr AwaitInfo
@ -111,7 +111,7 @@ type
# be RootRef here otherwise the wrong GC keeps track of it!
owner: pointer # ptr Worker
FlowVarObj[T] = object of FlowVarBaseObj
FlowVarObj[T] {.acyclic.} = object of FlowVarBaseObj
blob: T
FlowVar*[T] {.compilerproc.} = ref FlowVarObj[T] ## A data flow variable.