)

//go:generate stringer -type=scannerMetric -trimprefix=scannerMetric $GOFILE

type scannerMetric uint8

type scannerMetrics struct {
	// All fields must be accessed atomically and aligned.
	operations [scannerMetricLast]uint64
	latency    [scannerMetricLastRealtime]lockedLastMinuteLatency

	// actions records actions performed.
	actions        [lifecycle.ActionCount]uint64

unfinished release note work.

To prepare the release notes for a release, run `relnote generate`.
That will merge the `.md` files in `next` into a single file.
Atomically (as close to it as possible) add that file to `_content/doc` directory
of the website repository and remove the `doc/next` directory in this repository.

To begin the next release development cycle, populate the contents of `next`

 * A helper which does some thread-safe operations for aggregate futures, which must be implemented
 * differently in GWT. Namely:
 *
 * <ul>
 *   <li>Lazily initializes a set of seen exceptions
 *   <li>Decrements a counter atomically
 * </ul>
 */
@GwtCompatible(emulated = true)
@ReflectionSupport(value = ReflectionSupport.Level.FULL)
@ElementTypesAreNonnullByDefault
abstract class AggregateFutureState<OutputT extends @Nullable Object>

func init() {
	// Inject metrics.
	ioutilx.OsOpenFile = OpenFile
	ioutilx.OpenFileDirectIO = OpenFileDirectIO
	ioutilx.OsOpen = Open
}

type osMetrics struct {
	// All fields must be accessed atomically and aligned.
	operations [osMetricLast]uint64
	latency    [osMetricLast]lockedLastMinuteLatency
}

// time an os action.
func (o *osMetrics) time(s osMetric) func() {
	startTime := time.Now()
	return func() {

 * A helper which does some thread-safe operations for aggregate futures, which must be implemented
 * differently in GWT. Namely:
 *
 * <ul>
 *   <li>Lazily initializes a set of seen exceptions
 *   <li>Decrements a counter atomically
 * </ul>
 */
@GwtCompatible(emulated = true)
@ReflectionSupport(value = ReflectionSupport.Level.FULL)
@ElementTypesAreNonnullByDefault
abstract class AggregateFutureState<OutputT extends @Nullable Object>