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Add a comment to fetchUserStream about locking

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Signed-off-by: Alex Chen <minecnly@gmail.com>
This commit is contained in:
Cnly 2019-07-18 15:44:39 +08:00
parent 9872921105
commit c136205465
1 changed files with 1 additions and 0 deletions
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syncapi/sync/notifier.go
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@ -185,6 +185,7 @@ func (n *Notifier) wakeupUsers(userIDs []string, newPos types.SyncPosition) {
// fetchUserStream retrieves a stream unique to the given user. If makeIfNotExists is true,
// a stream will be made for this user if one doesn't exist and it will be returned. This
// function does not wait for data to be available on the stream.
// NB: Callers should have locked the mutex before calling this function.
func (n *Notifier) fetchUserStream(userID string, makeIfNotExists bool) *UserStream {
stream, ok := n.userStreams[userID]
if !ok && makeIfNotExists {