[#74] pool: move to sync/atomic

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

go.mod

@@ -13,7 +13,6 @@ require (
 	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/neo-go v0.100.1
 	github.com/stretchr/testify v1.8.2
-	go.uber.org/atomic v1.10.0
 	go.uber.org/zap v1.24.0
 )
 
@@ -42,6 +41,7 @@ require (
 	go.opentelemetry.io/otel/sdk v1.14.0 // indirect
 	go.opentelemetry.io/otel/trace v1.14.0 // indirect
 	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
+	go.uber.org/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.9.0 // indirect
 	golang.org/x/crypto v0.4.0 // indirect
 	golang.org/x/exp v0.0.0-20221227203929-1b447090c38c // indirect

pool/cache.go

@@ -10,7 +10,7 @@ import (
 
 type sessionCache struct {
 	cache        *lru.Cache[string, *cacheValue]
-	currentEpoch uint64
+	currentEpoch atomic.Uint64
 }
 
 type cacheValue struct {
@@ -58,14 +58,14 @@ func (c *sessionCache) DeleteByPrefix(prefix string) {
 }
 
 func (c *sessionCache) updateEpoch(newEpoch uint64) {
-	epoch := atomic.LoadUint64(&c.currentEpoch)
+	epoch := c.currentEpoch.Load()
 	if newEpoch > epoch {
-		atomic.StoreUint64(&c.currentEpoch, newEpoch)
+		c.currentEpoch.Store(newEpoch)
 	}
 }
 
 func (c *sessionCache) expired(val *cacheValue) bool {
-	epoch := atomic.LoadUint64(&c.currentEpoch)
+	epoch := c.currentEpoch.Load()
 	// use epoch+1 (clear cache beforehand) to prevent 'expired session token' error right after epoch tick
 	return val.token.ExpiredAt(epoch + 1)
 }

pool/pool.go

@@ -11,6 +11,7 @@ import (
 	"math/rand"
 	"sort"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/accounting"
@@ -29,7 +30,6 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/google/uuid"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"go.uber.org/atomic"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -194,10 +194,13 @@ func newClientStatusMonitor(logger *zap.Logger, addr string, errorThreshold uint
 		methods[i] = &methodStatus{name: i.String()}
 	}
 
+	healthy := new(atomic.Bool)
+	healthy.Store(true)
+
 	return clientStatusMonitor{
 		logger:         logger,
 		addr:           addr,
-		healthy:        atomic.NewBool(true),
+		healthy:        healthy,
 		errorThreshold: errorThreshold,
 		methods:        methods,
 	}
@@ -1796,7 +1799,7 @@ func (p *Pool) updateInnerNodesHealth(ctx context.Context, i int, bufferWeights
 	pool := p.innerPools[i]
 	options := p.rebalanceParams
 
-	healthyChanged := atomic.NewBool(false)
+	healthyChanged := new(atomic.Bool)
 	wg := sync.WaitGroup{}
 
 	for j, cli := range pool.clients {