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eth/downloader: exit loop when there is no more available task

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rjl493456442 2017-08-14 13:48:24 +08:00
parent 6ca59d98f8
commit 02aa86e659
1 changed files with 4 additions and 0 deletions
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4
eth/downloader/downloader.go
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@ -1093,6 +1093,10 @@ func (d *Downloader) fetchParts(errCancel error, deliveryCh chan dataPack, deliv
throttled = true throttled = true
break break
} }
// Short circuit if there is no more available task.
if pending() == 0 {
break
}
// Reserve a chunk of fetches for a peer. A nil can mean either that // Reserve a chunk of fetches for a peer. A nil can mean either that
// no more headers are available, or that the peer is known not to // no more headers are available, or that the peer is known not to
// have them. // have them.