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Make Connect2Switches blocking

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This commit is contained in:
Jae Kwon 2016-12-06 01:13:03 -08:00 committed by Ethan Buchman
parent 58e42397f8
commit 2b750ea49f
1 changed files with 12 additions and 2 deletions
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14
switch.go
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@ -483,13 +483,23 @@ func MakeConnectedSwitches(n int, initSwitch func(int, *Switch) *Switch, connect
} }
// Will connect switches i and j via net.Pipe() // Will connect switches i and j via net.Pipe()
// Blocks until a conection is established.
// NOTE: caller ensures i and j are within bounds // NOTE: caller ensures i and j are within bounds
func Connect2Switches(switches []*Switch, i, j int) { func Connect2Switches(switches []*Switch, i, j int) {
switchI := switches[i] switchI := switches[i]
switchJ := switches[j] switchJ := switches[j]
c1, c2 := net.Pipe() c1, c2 := net.Pipe()
go switchI.AddPeerWithConnection(c1, false) // AddPeer is blocking, requires handshake. doneCh := make(chan struct{})
go switchJ.AddPeerWithConnection(c2, true) go func() {
switchI.AddPeerWithConnection(c1, false) // AddPeer is blocking, requires handshake.
doneCh <- struct{}{}
}()
go func() {
switchJ.AddPeerWithConnection(c2, true)
doneCh <- struct{}{}
}()
<-doneCh
<-doneCh
} }
func StartSwitches(switches []*Switch) error { func StartSwitches(switches []*Switch) error {