cancellable: use sync.Once to prevent double channel close

docker / engine-api

DEPRECATED: Please see https://github.com/docker/docker/tree/master/client

Apache License 2.0

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Closed LK4D4 closed 8 years ago

LK4D4 commented 8 years ago

ping @tonistiigi

tonistiigi commented 8 years ago

~~@LK4D4 Would it make sense to just remove notifyingReader if it's not used for anything?~~

LGTM

LK4D4 commented 8 years ago

@tonistiigi I noticed that Do uses it. It waits on that channel there.

vdemeester commented 8 years ago

LGTM :cat: