kotovalexarian-likes-github/moby--moby
1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
Code Releases Activity

Make Broadcaster Wait function wait for all writers to finish before returning

Browse source 
Also, use the channel to determine if the broadcaster is closed,
removing the redundant isClosed variable.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2015-09-10 10:08:02 -07:00
parent 50c355777e
commit 4a5d40fdb7
1 changed files with 5 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
pkg/progressreader/broadcaster.go
View file

@ -24,9 +24,6 @@ type Broadcaster struct {
history [][]byte
// wg is a WaitGroup used to wait for all writes to finish on Close
wg sync.WaitGroup
// isClosed is set to true when Close is called to avoid closing c
// multiple times.
isClosed bool
// result is the argument passed to the first call of Close, and
// returned to callers of Wait
result error
@ -141,11 +138,10 @@ func (broadcaster *Broadcaster) Add(w io.Writer) error {
// argument is a result that should be returned to waiters blocking on Wait.
func (broadcaster *Broadcaster) CloseWithError(result error) {
broadcaster.Lock()
if broadcaster.isClosed {
if broadcaster.closed() {
broadcaster.Unlock()
return
}
broadcaster.isClosed = true
broadcaster.result = result
close(broadcaster.c)
broadcaster.cond.Broadcast()
@ -161,9 +157,11 @@ func (broadcaster *Broadcaster) Close() {
broadcaster.CloseWithError(nil)
}
// Wait blocks until the operation is marked as completed by the Done method.
// It returns the argument that was passed to Close.
// Wait blocks until the operation is marked as completed by the Close method,
// and all writer goroutines have completed. It returns the argument that was
// passed to Close.
func (broadcaster *Broadcaster) Wait() error {
<-broadcaster.c
broadcaster.wg.Wait()
return broadcaster.result
}