all: replace atomic.Value with atomic.Pointer[T]

This eliminates the need in .(*T) casting for results obtained from Load()

Leave atomic.Value for map, since atomic.Pointer[map[...]...] makes double pointer to map,
because map is already a pointer type.

app/vmagent/remotewrite/remotewrite.go

@@ -93,7 +93,7 @@ func MultitenancyEnabled() bool {
 }
 
 // Contains the current relabelConfigs.
-var allRelabelConfigs atomic.Value
+var allRelabelConfigs atomic.Pointer[relabelConfigs]
 
 // maxQueues limits the maximum value for `-remoteWrite.queues`. There is no sense in setting too high value,
 // since it may lead to high memory usage due to big number of buffers.
@@ -346,7 +346,7 @@ func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) {
 	}
 
 	var rctx *relabelCtx
-	rcs := allRelabelConfigs.Load().(*relabelConfigs)
+	rcs := allRelabelConfigs.Load()
 	pcsGlobal := rcs.global
 	if pcsGlobal.Len() > 0 || len(labelsGlobal) > 0 {
 		rctx = getRelabelCtx()
@@ -612,7 +612,7 @@ func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) {
 	// Apply relabeling
 	var rctx *relabelCtx
 	var v *[]prompbmarshal.TimeSeries
-	rcs := allRelabelConfigs.Load().(*relabelConfigs)
+	rcs := allRelabelConfigs.Load()
 	pcs := rcs.perURL[rwctx.idx]
 	if pcs.Len() > 0 {
 		rctx = getRelabelCtx()

app/vminsert/relabel/relabel.go

@@ -69,7 +69,7 @@ var (
 	configTimestamp    = metrics.NewCounter(`vm_relabel_config_last_reload_success_timestamp_seconds`)
 )
 
-var pcsGlobal atomic.Value
+var pcsGlobal atomic.Pointer[promrelabel.ParsedConfigs]
 
 // CheckRelabelConfig checks config pointed by -relabelConfig
 func CheckRelabelConfig() error {
@@ -90,7 +90,7 @@ func loadRelabelConfig() (*promrelabel.ParsedConfigs, error) {
 
 // HasRelabeling returns true if there is global relabeling.
 func HasRelabeling() bool {
-	pcs := pcsGlobal.Load().(*promrelabel.ParsedConfigs)
+	pcs := pcsGlobal.Load()
 	return pcs.Len() > 0 || *usePromCompatibleNaming
 }
 
@@ -110,7 +110,7 @@ func (ctx *Ctx) Reset() {
 //
 // The returned labels are valid until the next call to ApplyRelabeling.
 func (ctx *Ctx) ApplyRelabeling(labels []prompb.Label) []prompb.Label {
-	pcs := pcsGlobal.Load().(*promrelabel.ParsedConfigs)
+	pcs := pcsGlobal.Load()
 	if pcs.Len() == 0 && !*usePromCompatibleNaming {
 		// There are no relabeling rules.
 		return labels

app/vmselect/promql/rollup_result_cache.go

@@ -63,7 +63,7 @@ func checkRollupResultCacheReset() {
 	for {
 		time.Sleep(checkRollupResultCacheResetInterval)
 		if atomic.SwapUint32(&needRollupResultCacheReset, 0) > 0 {
-			mr := rollupResultResetMetricRowSample.Load().(*storage.MetricRow)
+			mr := rollupResultResetMetricRowSample.Load()
 			d := int64(fasttime.UnixTimestamp()*1000) - mr.Timestamp - cacheTimestampOffset.Milliseconds()
 			logger.Warnf("resetting rollup result cache because the metric %s has a timestamp older than -search.cacheTimestampOffset=%s by %.3fs",
 				mr.String(), cacheTimestampOffset, float64(d)/1e3)
@@ -76,7 +76,7 @@ const checkRollupResultCacheResetInterval = 5 * time.Second
 
 var needRollupResultCacheReset uint32
 var checkRollupResultCacheResetOnce sync.Once
-var rollupResultResetMetricRowSample atomic.Value
+var rollupResultResetMetricRowSample atomic.Pointer[storage.MetricRow]
 
 var rollupResultCacheV = &rollupResultCache{
 	c: workingsetcache.New(1024 * 1024), // This is a cache for testing.

lib/appmetrics/appmetrics.go

@@ -32,14 +32,14 @@ func WritePrometheusMetrics(w io.Writer) {
 	}
 	metricsCacheLock.Unlock()
 
-	bb := metricsCache.Load().(*bytesutil.ByteBuffer)
+	bb := metricsCache.Load()
 	_, _ = w.Write(bb.B)
 }
 
 var (
 	metricsCacheLock           sync.Mutex
 	metricsCacheLastUpdateTime time.Time
-	metricsCache               atomic.Value
+	metricsCache               atomic.Pointer[bytesutil.ByteBuffer]
 )
 
 func writePrometheusMetrics(w io.Writer) {

lib/bloomfilter/limiter.go

@@ -11,7 +11,7 @@ import (
 // It is safe using the Limiter from concurrent goroutines.
 type Limiter struct {
 	maxItems int
-	v        atomic.Value
+	v        atomic.Pointer[limiter]
 
 	wg     sync.WaitGroup
 	stopCh chan struct{}
@@ -55,7 +55,7 @@ func (l *Limiter) MaxItems() int {
 
 // CurrentItems return the current number of items registered in l.
 func (l *Limiter) CurrentItems() int {
-	lm := l.v.Load().(*limiter)
+	lm := l.v.Load()
 	n := atomic.LoadUint64(&lm.currentItems)
 	return int(n)
 }
@@ -67,7 +67,7 @@ func (l *Limiter) CurrentItems() int {
 // True is returned if h is added or already exists in l.
 // False is returned if h cannot be added to l, since it already has maxItems unique items.
 func (l *Limiter) Add(h uint64) bool {
-	lm := l.v.Load().(*limiter)
+	lm := l.v.Load()
 	return lm.Add(h)
 }
 

lib/encoding/zstd/zstd_pure.go

@@ -15,7 +15,7 @@ var (
 	decoder *zstd.Decoder
 
 	mu sync.Mutex
-	av atomic.Value
+	av atomic.Pointer[registry]
 )
 
 type registry map[int]*zstd.Encoder
@@ -45,7 +45,7 @@ func CompressLevel(dst, src []byte, compressionLevel int) []byte {
 }
 
 func getEncoder(compressionLevel int) *zstd.Encoder {
-	r := av.Load().(registry)
+	r := av.Load()
 	e := r[compressionLevel]
 	if e != nil {
 		return e
@@ -54,7 +54,7 @@ func getEncoder(compressionLevel int) *zstd.Encoder {
 	mu.Lock()
 	// Create the encoder under lock in order to prevent from wasted work
 	// when concurrent goroutines create encoder for the same compressionLevel.
-	r1 := av.Load().(registry)
+	r1 := av.Load()
 	if e = r1[compressionLevel]; e == nil {
 		e = newEncoder(compressionLevel)
 		r2 := make(registry)

lib/promscrape/discovery/kuma/api.go

@@ -27,7 +27,7 @@ type apiConfig struct {
 	apiPath string
 
 	// labels contains the latest discovered labels.
-	labels atomic.Value
+	labels atomic.Pointer[[]*promutils.Labels]
 
 	cancel context.CancelFunc
 	wg     sync.WaitGroup

lib/promscrape/discovery/kuma/kuma.go

@@ -38,8 +38,7 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 	if err != nil {
 		return nil, fmt.Errorf("cannot get API config for kuma_sd: %w", err)
 	}
-	v := cfg.labels.Load()
+	pLabels := cfg.labels.Load()
-	pLabels := v.(*[]*promutils.Labels)
 	return *pLabels, nil
 }
 

lib/promscrape/scraper.go

@@ -84,18 +84,17 @@ var (
 	PendingScrapeConfigs int32
 
 	// configData contains -promscrape.config data
-	configData atomic.Value
+	configData atomic.Pointer[[]byte]
 )
 
 // WriteConfigData writes -promscrape.config contents to w
 func WriteConfigData(w io.Writer) {
-	v := configData.Load()
+	p := configData.Load()
-	if v == nil {
+	if p == nil {
 		// Nothing to write to w
 		return
 	}
-	b := v.(*[]byte)
+	_, _ = w.Write(*p)
-	_, _ = w.Write(*b)
 }
 
 func runScraper(configFile string, pushData func(at *auth.Token, wr *prompbmarshal.WriteRequest), globalStopCh <-chan struct{}) {

lib/storage/storage.go

@@ -60,7 +60,7 @@ type Storage struct {
 	// lock file for exclusive access to the storage on the given path.
 	flockF *os.File
 
-	idbCurr atomic.Value
+	idbCurr atomic.Pointer[indexDB]
 
 	tb *table
 
@@ -81,16 +81,16 @@ type Storage struct {
 	dateMetricIDCache *dateMetricIDCache
 
 	// Fast cache for MetricID values occurred during the current hour.
-	currHourMetricIDs atomic.Value
+	currHourMetricIDs atomic.Pointer[hourMetricIDs]
 
 	// Fast cache for MetricID values occurred during the previous hour.
-	prevHourMetricIDs atomic.Value
+	prevHourMetricIDs atomic.Pointer[hourMetricIDs]
 
 	// Fast cache for pre-populating per-day inverted index for the next day.
 	// This is needed in order to remove CPU usage spikes at 00:00 UTC
 	// due to creation of per-day inverted index for active time series.
 	// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/430 for details.
-	nextDayMetricIDs atomic.Value
+	nextDayMetricIDs atomic.Pointer[byDateMetricIDEntry]
 
 	// Pending MetricID values to be added to currHourMetricIDs.
 	pendingHourEntriesLock sync.Mutex
@@ -101,7 +101,7 @@ type Storage struct {
 	pendingNextDayMetricIDs     *uint64set.Set
 
 	// prefetchedMetricIDs contains metricIDs for pre-fetched metricNames in the prefetchMetricNames function.
-	prefetchedMetricIDs atomic.Value
+	prefetchedMetricIDs atomic.Pointer[uint64set.Set]
 
 	// prefetchedMetricIDsDeadline is used for periodic reset of prefetchedMetricIDs in order to limit its size under high rate of creating new series.
 	prefetchedMetricIDsDeadline uint64
@@ -129,7 +129,7 @@ type Storage struct {
 	//
 	// It is safe to keep the set in memory even for big number of deleted
 	// metricIDs, since it usually requires 1 bit per deleted metricID.
-	deletedMetricIDs           atomic.Value
+	deletedMetricIDs           atomic.Pointer[uint64set.Set]
 	deletedMetricIDsUpdateLock sync.Mutex
 
 	isReadOnly uint32
@@ -268,7 +268,7 @@ func getTSIDCacheSize() int {
 }
 
 func (s *Storage) getDeletedMetricIDs() *uint64set.Set {
-	return s.deletedMetricIDs.Load().(*uint64set.Set)
+	return s.deletedMetricIDs.Load()
 }
 
 func (s *Storage) setDeletedMetricIDs(dmis *uint64set.Set) {
@@ -434,7 +434,7 @@ func (s *Storage) DeleteStaleSnapshots(maxAge time.Duration) error {
 }
 
 func (s *Storage) idb() *indexDB {
-	return s.idbCurr.Load().(*indexDB)
+	return s.idbCurr.Load()
 }
 
 // Metrics contains essential metrics for the Storage.
@@ -569,8 +569,8 @@ func (s *Storage) UpdateMetrics(m *Metrics) {
 	m.DateMetricIDCacheSyncsCount += atomic.LoadUint64(&s.dateMetricIDCache.syncsCount)
 	m.DateMetricIDCacheResetsCount += atomic.LoadUint64(&s.dateMetricIDCache.resetsCount)
 
-	hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+	hmCurr := s.currHourMetricIDs.Load()
-	hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+	hmPrev := s.prevHourMetricIDs.Load()
 	hourMetricIDsLen := hmPrev.m.Len()
 	if hmCurr.m.Len() > hourMetricIDsLen {
 		hourMetricIDsLen = hmCurr.m.Len()
@@ -579,11 +579,11 @@ func (s *Storage) UpdateMetrics(m *Metrics) {
 	m.HourMetricIDCacheSizeBytes += hmCurr.m.SizeBytes()
 	m.HourMetricIDCacheSizeBytes += hmPrev.m.SizeBytes()
 
-	nextDayMetricIDs := &s.nextDayMetricIDs.Load().(*byDateMetricIDEntry).v
+	nextDayMetricIDs := &s.nextDayMetricIDs.Load().v
 	m.NextDayMetricIDCacheSize += uint64(nextDayMetricIDs.Len())
 	m.NextDayMetricIDCacheSizeBytes += nextDayMetricIDs.SizeBytes()
 
-	prefetchedMetricIDs := s.prefetchedMetricIDs.Load().(*uint64set.Set)
+	prefetchedMetricIDs := s.prefetchedMetricIDs.Load()
 	m.PrefetchedMetricIDsSize += uint64(prefetchedMetricIDs.Len())
 	m.PrefetchedMetricIDsSizeBytes += uint64(prefetchedMetricIDs.SizeBytes())
 
@@ -797,12 +797,12 @@ func (s *Storage) MustClose() {
 	s.mustSaveCache(s.metricNameCache, "metricID_metricName")
 	s.metricNameCache.Stop()
 
-	hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+	hmCurr := s.currHourMetricIDs.Load()
 	s.mustSaveHourMetricIDs(hmCurr, "curr_hour_metric_ids")
-	hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+	hmPrev := s.prevHourMetricIDs.Load()
 	s.mustSaveHourMetricIDs(hmPrev, "prev_hour_metric_ids")
 
-	nextDayMetricIDs := s.nextDayMetricIDs.Load().(*byDateMetricIDEntry)
+	nextDayMetricIDs := s.nextDayMetricIDs.Load()
 	s.mustSaveNextDayMetricIDs(nextDayMetricIDs)
 
 	// Release lock file.
@@ -1093,7 +1093,7 @@ func (s *Storage) prefetchMetricNames(qt *querytracer.Tracer, srcMetricIDs []uin
 		return nil
 	}
 	var metricIDs uint64Sorter
-	prefetchedMetricIDs := s.prefetchedMetricIDs.Load().(*uint64set.Set)
+	prefetchedMetricIDs := s.prefetchedMetricIDs.Load()
 	for _, metricID := range srcMetricIDs {
 		if prefetchedMetricIDs.Has(metricID) {
 			continue
@@ -1906,10 +1906,10 @@ func (s *Storage) updatePerDateData(rows []rawRow, mrs []*MetricRow) error {
 		prevDate     uint64
 		prevMetricID uint64
 	)
-	hm := s.currHourMetricIDs.Load().(*hourMetricIDs)
+	hm := s.currHourMetricIDs.Load()
-	hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+	hmPrev := s.prevHourMetricIDs.Load()
 	hmPrevDate := hmPrev.hour / 24
-	nextDayMetricIDs := &s.nextDayMetricIDs.Load().(*byDateMetricIDEntry).v
+	nextDayMetricIDs := &s.nextDayMetricIDs.Load().v
 	ts := fasttime.UnixTimestamp()
 	// Start pre-populating the next per-day inverted index during the last hour of the current day.
 	// pMin linearly increases from 0 to 1 during the last hour of the day.
@@ -2055,7 +2055,7 @@ type dateMetricIDCache struct {
 	resetsCount uint64
 
 	// Contains immutable map
-	byDate atomic.Value
+	byDate atomic.Pointer[byDateMetricIDMap]
 
 	// Contains mutable map protected by mu
 	byDateMutable    *byDateMetricIDMap
@@ -2085,7 +2085,7 @@ func (dmc *dateMetricIDCache) resetLocked() {
 }
 
 func (dmc *dateMetricIDCache) EntriesCount() int {
-	byDate := dmc.byDate.Load().(*byDateMetricIDMap)
+	byDate := dmc.byDate.Load()
 	n := 0
 	for _, e := range byDate.m {
 		n += e.v.Len()
@@ -2094,7 +2094,7 @@ func (dmc *dateMetricIDCache) EntriesCount() int {
 }
 
 func (dmc *dateMetricIDCache) SizeBytes() uint64 {
-	byDate := dmc.byDate.Load().(*byDateMetricIDMap)
+	byDate := dmc.byDate.Load()
 	n := uint64(0)
 	for _, e := range byDate.m {
 		n += e.v.SizeBytes()
@@ -2103,7 +2103,7 @@ func (dmc *dateMetricIDCache) SizeBytes() uint64 {
 }
 
 func (dmc *dateMetricIDCache) Has(date, metricID uint64) bool {
-	byDate := dmc.byDate.Load().(*byDateMetricIDMap)
+	byDate := dmc.byDate.Load()
 	v := byDate.get(date)
 	if v.Has(metricID) {
 		// Fast path.
@@ -2169,7 +2169,7 @@ func (dmc *dateMetricIDCache) syncLocked() {
 		// Nothing to sync.
 		return
 	}
-	byDate := dmc.byDate.Load().(*byDateMetricIDMap)
+	byDate := dmc.byDate.Load()
 	byDateMutable := dmc.byDateMutable
 	for date, e := range byDateMutable.m {
 		v := byDate.get(date)
@@ -2182,7 +2182,7 @@ func (dmc *dateMetricIDCache) syncLocked() {
 			date: date,
 			v:    *v,
 		}
-		if date == byDateMutable.hotEntry.Load().(*byDateMetricIDEntry).date {
+		if date == byDateMutable.hotEntry.Load().date {
 			byDateMutable.hotEntry.Store(dme)
 		}
 		byDateMutable.m[date] = dme
@@ -2205,7 +2205,7 @@ func (dmc *dateMetricIDCache) syncLocked() {
 }
 
 type byDateMetricIDMap struct {
-	hotEntry atomic.Value
+	hotEntry atomic.Pointer[byDateMetricIDEntry]
 	m        map[uint64]*byDateMetricIDEntry
 }
 
@@ -2218,7 +2218,7 @@ func newByDateMetricIDMap() *byDateMetricIDMap {
 }
 
 func (dmm *byDateMetricIDMap) get(date uint64) *uint64set.Set {
-	hotEntry := dmm.hotEntry.Load().(*byDateMetricIDEntry)
+	hotEntry := dmm.hotEntry.Load()
 	if hotEntry.date == date {
 		// Fast path
 		return &hotEntry.v
@@ -2250,7 +2250,7 @@ type byDateMetricIDEntry struct {
 }
 
 func (s *Storage) updateNextDayMetricIDs(date uint64) {
-	e := s.nextDayMetricIDs.Load().(*byDateMetricIDEntry)
+	e := s.nextDayMetricIDs.Load()
 	s.pendingNextDayMetricIDsLock.Lock()
 	pendingMetricIDs := s.pendingNextDayMetricIDs
 	s.pendingNextDayMetricIDs = &uint64set.Set{}
@@ -2277,7 +2277,7 @@ func (s *Storage) updateNextDayMetricIDs(date uint64) {
 }
 
 func (s *Storage) updateCurrHourMetricIDs(hour uint64) {
-	hm := s.currHourMetricIDs.Load().(*hourMetricIDs)
+	hm := s.currHourMetricIDs.Load()
 	s.pendingHourEntriesLock.Lock()
 	newMetricIDs := s.pendingHourEntries
 	s.pendingHourEntries = &uint64set.Set{}

lib/storage/storage_test.go

@@ -169,7 +169,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		hmOrig.m.Add(34)
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
@@ -177,7 +177,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 			t.Fatalf("unexpected length of hm.m; got %d; want %d", hmCurr.m.Len(), 0)
 		}
 
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		if !reflect.DeepEqual(hmPrev, hmOrig) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmOrig)
 		}
@@ -197,7 +197,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		hmOrig.m.Add(34)
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
@@ -205,7 +205,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 			t.Fatalf("unexpected hmCurr; got %v; want %v", hmCurr, hmOrig)
 		}
 
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		hmEmpty := &hourMetricIDs{}
 		if !reflect.DeepEqual(hmPrev, hmEmpty) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmEmpty)
@@ -235,7 +235,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		hmOrig.m.Add(34)
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
@@ -243,7 +243,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 			t.Fatalf("unexpected hmCurr.m; got %v; want %v", hmCurr.m, pendingHourEntries)
 		}
 
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		if !reflect.DeepEqual(hmPrev, hmOrig) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmOrig)
 		}
@@ -269,7 +269,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		hmOrig.m.Add(34)
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
@@ -284,7 +284,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 			t.Fatalf("unexpected hm.m; got %v; want %v", hmCurr.m, m)
 		}
 
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		hmEmpty := &hourMetricIDs{}
 		if !reflect.DeepEqual(hmPrev, hmEmpty) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmEmpty)
@@ -312,7 +312,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		hmOrig.m.Add(34)
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
@@ -327,7 +327,7 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 			t.Fatalf("unexpected hm.m; got %v; want %v", hmCurr.m, m)
 		}
 
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		hmEmpty := &hourMetricIDs{}
 		if !reflect.DeepEqual(hmPrev, hmEmpty) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmEmpty)
@@ -355,14 +355,14 @@ func TestUpdateCurrHourMetricIDs(t *testing.T) {
 		}
 		s.currHourMetricIDs.Store(hmOrig)
 		s.updateCurrHourMetricIDs(hour)
-		hmCurr := s.currHourMetricIDs.Load().(*hourMetricIDs)
+		hmCurr := s.currHourMetricIDs.Load()
 		if hmCurr.hour != hour {
 			t.Fatalf("unexpected hmCurr.hour; got %d; want %d", hmCurr.hour, hour)
 		}
 		if hmCurr.m.Len() != 0 {
 			t.Fatalf("unexpected non-empty hmCurr.m; got %v", hmCurr.m.AppendTo(nil))
 		}
-		hmPrev := s.prevHourMetricIDs.Load().(*hourMetricIDs)
+		hmPrev := s.prevHourMetricIDs.Load()
 		if !reflect.DeepEqual(hmPrev, hmOrig) {
 			t.Fatalf("unexpected hmPrev; got %v; want %v", hmPrev, hmOrig)
 		}

lib/workingsetcache/cache.go

@@ -30,8 +30,8 @@ const (
 // The cache evicts inactive entries after the given expireDuration.
 // Recently accessed entries survive expireDuration.
 type Cache struct {
-	curr atomic.Value
+	curr atomic.Pointer[fastcache.Cache]
-	prev atomic.Value
+	prev atomic.Pointer[fastcache.Cache]
 
 	// csHistory holds cache stats history
 	csHistory fastcache.Stats
@@ -148,8 +148,8 @@ func (c *Cache) expirationWatcher(expireDuration time.Duration) {
 			return
 		}
 		// Reset prev cache and swap it with the curr cache.
-		prev := c.prev.Load().(*fastcache.Cache)
+		prev := c.prev.Load()
-		curr := c.curr.Load().(*fastcache.Cache)
+		curr := c.curr.Load()
 		c.prev.Store(curr)
 		var cs fastcache.Stats
 		prev.UpdateStats(&cs)
@@ -188,8 +188,8 @@ func (c *Cache) prevCacheWatcher() {
 			c.mu.Unlock()
 			return
 		}
-		prev := c.prev.Load().(*fastcache.Cache)
+		prev := c.prev.Load()
-		curr := c.curr.Load().(*fastcache.Cache)
+		curr := c.curr.Load()
 		var csCurr, csPrev fastcache.Stats
 		curr.UpdateStats(&csCurr)
 		prev.UpdateStats(&csPrev)
@@ -232,7 +232,7 @@ func (c *Cache) cacheSizeWatcher() {
 			continue
 		}
 		var cs fastcache.Stats
-		curr := c.curr.Load().(*fastcache.Cache)
+		curr := c.curr.Load()
 		curr.UpdateStats(&cs)
 		if cs.BytesSize >= uint64(0.9*float64(cs.MaxBytesSize)) {
 			maxBytesSize = cs.MaxBytesSize
@@ -254,8 +254,8 @@ func (c *Cache) cacheSizeWatcher() {
 
 	c.mu.Lock()
 	c.setMode(switching)
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	c.prev.Store(curr)
 	var cs fastcache.Stats
 	prev.UpdateStats(&cs)
@@ -273,7 +273,7 @@ func (c *Cache) cacheSizeWatcher() {
 		case <-t.C:
 		}
 		var cs fastcache.Stats
-		curr := c.curr.Load().(*fastcache.Cache)
+		curr := c.curr.Load()
 		curr.UpdateStats(&cs)
 		if cs.BytesSize >= maxBytesSize {
 			break
@@ -282,7 +282,7 @@ func (c *Cache) cacheSizeWatcher() {
 
 	c.mu.Lock()
 	c.setMode(whole)
-	prev = c.prev.Load().(*fastcache.Cache)
+	prev = c.prev.Load()
 	c.prev.Store(fastcache.New(1024))
 	cs.Reset()
 	prev.UpdateStats(&cs)
@@ -293,7 +293,7 @@ func (c *Cache) cacheSizeWatcher() {
 
 // Save saves the cache to filePath.
 func (c *Cache) Save(filePath string) error {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	concurrency := cgroup.AvailableCPUs()
 	return curr.SaveToFileConcurrent(filePath, concurrency)
 }
@@ -311,10 +311,10 @@ func (c *Cache) Stop() {
 // Reset resets the cache.
 func (c *Cache) Reset() {
 	var cs fastcache.Stats
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
 	prev.UpdateStats(&cs)
 	prev.Reset()
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	curr.UpdateStats(&cs)
 	updateCacheStatsHistory(&c.csHistory, &cs)
 	curr.Reset()
@@ -335,11 +335,11 @@ func (c *Cache) UpdateStats(fcs *fastcache.Stats) {
 	updateCacheStatsHistory(fcs, &c.csHistory)
 
 	var cs fastcache.Stats
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	curr.UpdateStats(&cs)
 	updateCacheStats(fcs, &cs)
 
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
 	cs.Reset()
 	prev.UpdateStats(&cs)
 	updateCacheStats(fcs, &cs)
@@ -369,7 +369,7 @@ func updateCacheStatsHistory(dst, src *fastcache.Stats) {
 
 // Get appends the found value for the given key to dst and returns the result.
 func (c *Cache) Get(dst, key []byte) []byte {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	result := curr.Get(dst, key)
 	if len(result) > len(dst) {
 		// Fast path - the entry is found in the current cache.
@@ -381,7 +381,7 @@ func (c *Cache) Get(dst, key []byte) []byte {
 	}
 
 	// Search for the entry in the previous cache.
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
 	result = prev.Get(dst, key)
 	if len(result) <= len(dst) {
 		// Nothing found.
@@ -394,14 +394,14 @@ func (c *Cache) Get(dst, key []byte) []byte {
 
 // Has verifies whether the cache contains the given key.
 func (c *Cache) Has(key []byte) bool {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	if curr.Has(key) {
 		return true
 	}
 	if c.loadMode() == whole {
 		return false
 	}
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
 	if !prev.Has(key) {
 		return false
 	}
@@ -417,13 +417,13 @@ var tmpBufPool bytesutil.ByteBufferPool
 
 // Set sets the given value for the given key.
 func (c *Cache) Set(key, value []byte) {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	curr.Set(key, value)
 }
 
 // GetBig appends the found value for the given key to dst and returns the result.
 func (c *Cache) GetBig(dst, key []byte) []byte {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	result := curr.GetBig(dst, key)
 	if len(result) > len(dst) {
 		// Fast path - the entry is found in the current cache.
@@ -435,7 +435,7 @@ func (c *Cache) GetBig(dst, key []byte) []byte {
 	}
 
 	// Search for the entry in the previous cache.
-	prev := c.prev.Load().(*fastcache.Cache)
+	prev := c.prev.Load()
 	result = prev.GetBig(dst, key)
 	if len(result) <= len(dst) {
 		// Nothing found.
@@ -448,7 +448,7 @@ func (c *Cache) GetBig(dst, key []byte) []byte {
 
 // SetBig sets the given value for the given key.
 func (c *Cache) SetBig(key, value []byte) {
-	curr := c.curr.Load().(*fastcache.Cache)
+	curr := c.curr.Load()
 	curr.SetBig(key, value)
 }