database: convert DB.{waitDuration,numClosed} to atomic type
Change-Id: I4a67a5e51a98938c07b3c38442f8d852db97cb2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/426085
Run-TryBot: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Run-TryBot: xie cui <
523516579@qq.com>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>