device.WaitPool implementation and usage fixes #106
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The sync.Locker used with a sync.Cond must be acquired when changing the associated condition, otherwise there is a window within sync.Cond.Wait() where a wake-up may be missed. Fixes: 4846070 ("device: use a waiting sync.Pool instead of a channel") Reviewed-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Jordan Whited <jordan@tailscale.com>
…itPool Fixes: 3bb8fec ("conn, device, tun: implement vectorized I/O plumbing") Reviewed-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Jordan Whited <jordan@tailscale.com>
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