diff options
Diffstat (limited to 'device/peer.go')
| -rw-r--r-- | device/peer.go | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/device/peer.go b/device/peer.go index 8a8224c..19434cd 100644 --- a/device/peer.go +++ b/device/peer.go @@ -27,7 +27,11 @@ type Peer struct { endpoint Endpoint persistentKeepaliveInterval uint16 - // This must be 64-bit aligned, so make sure the above members come out to even alignment and pad accordingly + // These fields are accessed with atomic operations, which must be + // 64-bit aligned even on 32-bit platforms. Go guarantees that an + // allocated struct will be 64-bit aligned. So we place + // atomically-accessed fields up front, so that they can share in + // this alignment before smaller fields throw it off. stats struct { txBytes uint64 // bytes send to peer (endpoint) rxBytes uint64 // bytes received from peer |