[#411] Remove unnecessary pointers for sync objects

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

cmd/frostfs-node/cache.go

@@ -25,19 +25,18 @@ type valueWithTime[V any] struct {
 }
 
 type locker struct {
-	mtx     *sync.Mutex
+	mtx     sync.Mutex
 	waiters int // not protected by mtx, must used outer mutex to update concurrently
 }
 
 type keyLocker[K comparable] struct {
 	lockers    map[K]*locker
-	lockersMtx *sync.Mutex
+	lockersMtx sync.Mutex
 }
 
 func newKeyLocker[K comparable]() *keyLocker[K] {
 	return &keyLocker[K]{
 		lockers: make(map[K]*locker),
-		lockersMtx: &sync.Mutex{},
 	}
 }
 
@@ -53,7 +52,6 @@ func (l *keyLocker[K]) LockKey(key K) {
 	}
 
 	locker := &locker{
-		mtx:     &sync.Mutex{},
 		waiters: 1,
 	}
 	locker.mtx.Lock()

cmd/frostfs-node/config.go

@@ -327,7 +327,7 @@ type internals struct {
 
 	log *logger.Logger
 
-	wg      *sync.WaitGroup
+	wg      sync.WaitGroup
 	workers []worker
 	closers []closer
 
@@ -589,7 +589,6 @@ func initInternals(appCfg *config.Config, log *logger.Logger) internals {
 		appCfg:       appCfg,
 		internalErr:  make(chan error),
 		log:          log,
-		wg:           new(sync.WaitGroup),
 		apiVersion:   version.Current(),
 		healthStatus: &healthStatus,
 	}

pkg/innerring/processors/alphabet/processor.go

@@ -49,7 +49,7 @@ type (
 	Processor struct {
 		parsedWallets []util.Uint160
 		// protects parsedWallets from concurrent change
-		pwLock            *sync.RWMutex
+		pwLock            sync.RWMutex
 		log               *logger.Logger
 		metrics           metrics.Register
 		pool              *ants.Pool
@@ -99,7 +99,6 @@ func New(p *Params) (*Processor, error) {
 
 	return &Processor{
 		parsedWallets:     p.ParsedWallets,
-		pwLock:            new(sync.RWMutex),
 		log:               p.Log,
 		metrics:           metricsRegister,
 		pool:              pool,

pkg/innerring/processors/frostfs/processor.go

@@ -68,7 +68,7 @@ type (
 		epochState          EpochState
 		alphabetState       AlphabetState
 		converter           PrecisionConverter
-		mintEmitLock        *sync.Mutex
+		mintEmitLock        sync.Mutex
 		mintEmitCache       *lru.Cache[string, uint64]
 		mintEmitThreshold   uint64
 		mintEmitValue       fixedn.Fixed8
@@ -148,7 +148,6 @@ func New(p *Params) (*Processor, error) {
 		epochState:          p.EpochState,
 		alphabetState:       p.AlphabetState,
 		converter:           p.Converter,
-		mintEmitLock:        new(sync.Mutex),
 		mintEmitCache:       lruCache,
 		mintEmitThreshold:   p.MintEmitThreshold,
 		mintEmitValue:       p.MintEmitValue,

pkg/innerring/processors/netmap/cleanup_table.go

@@ -9,7 +9,7 @@ import (
 
 type (
 	cleanupTable struct {
-		*sync.RWMutex
+		sync.RWMutex
 		enabled    bool
 		threshold  uint64
 		lastAccess map[string]epochStampWithNodeInfo
@@ -29,7 +29,6 @@ type (
 
 func newCleanupTable(enabled bool, threshold uint64) cleanupTable {
 	return cleanupTable{
-		RWMutex:    new(sync.RWMutex),
 		enabled:    enabled,
 		threshold:  threshold,
 		lastAccess: make(map[string]epochStampWithNodeInfo),

pkg/local_object_storage/engine/engine.go

@@ -20,7 +20,7 @@ type StorageEngine struct {
 
 	removeDuplicatesInProgress atomic.Bool
 
-	mtx *sync.RWMutex
+	mtx sync.RWMutex
 
 	shards map[string]hashedShard
 
@@ -226,14 +226,11 @@ func New(opts ...Option) *StorageEngine {
 
 	return &StorageEngine{
 		cfg:             c,
-		mtx:        new(sync.RWMutex),
 		shards:          make(map[string]hashedShard),
 		shardPools:      make(map[string]util.WorkerPool),
 		closeCh:         make(chan struct{}),
 		setModeCh:       make(chan setModeRequest),
-		evacuateLimiter: &evacuationLimiter{
+		evacuateLimiter: &evacuationLimiter{},
-			guard: &sync.RWMutex{},
-		},
 	}
 }
 

pkg/local_object_storage/engine/evacuate_limiter.go

@@ -113,7 +113,7 @@ type evacuationLimiter struct {
 	eg     *errgroup.Group
 	cancel context.CancelFunc
 
-	guard *sync.RWMutex
+	guard sync.RWMutex
 }
 
 func (l *evacuationLimiter) TryStart(ctx context.Context, shardIDs []string, result *EvacuateShardRes) (*errgroup.Group, context.Context, error) {

pkg/morph/client/client.go

@@ -66,7 +66,7 @@ type Client struct {
 	// switchLock protects endpoints, inactive, and subscription-related fields.
 	// It is taken exclusively during endpoint switch and locked in shared mode
 	// on every normal call.
-	switchLock *sync.RWMutex
+	switchLock sync.RWMutex
 
 	// channel for internal stop
 	closeChan chan struct{}
@@ -83,7 +83,7 @@ type Client struct {
 }
 
 type cache struct {
-	m *sync.RWMutex
+	m sync.RWMutex
 
 	nnsHash   *util.Uint160
 	gKey      *keys.PublicKey

pkg/morph/client/constructor.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sync"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
@@ -110,7 +109,6 @@ func New(ctx context.Context, key *keys.PrivateKey, opts ...Option) (*Client, er
 		acc:       acc,
 		accAddr:   accAddr,
 		cfg:       *cfg,
-		switchLock: &sync.RWMutex{},
 		closeChan: make(chan struct{}),
 	}
 
@@ -198,7 +196,6 @@ func newActor(ws *rpcclient.WSClient, acc *wallet.Account, cfg cfg) (*actor.Acto
 func newClientCache() cache {
 	c, _ := lru.New[util.Uint256, uint32](100) // returns error only if size is negative
 	return cache{
-		m:         &sync.RWMutex{},
 		txHeights: c,
 	}
 }

pkg/morph/subscriber/subscriber.go

@@ -42,7 +42,7 @@ type (
 	}
 
 	subscriber struct {
-		*sync.RWMutex
+		sync.RWMutex
 		log    *logger.Logger
 		client *client.Client
 
@@ -163,7 +163,6 @@ func New(ctx context.Context, p *Params) (Subscriber, error) {
 	}
 
 	sub := &subscriber{
-		RWMutex:    new(sync.RWMutex),
 		log:        p.Log,
 		client:     p.Client,
 		notifyChan: make(chan *state.ContainedNotificationEvent),

pkg/morph/timer/block.go

@@ -17,7 +17,7 @@ type BlockTickHandler func()
 type BlockTimer struct {
 	rolledBack bool
 
-	mtx *sync.Mutex
+	mtx sync.Mutex
 
 	dur BlockMeter
 
@@ -64,7 +64,6 @@ func StaticBlockMeter(d uint32) BlockMeter {
 // Reset should be called before timer ticking.
 func NewBlockTimer(dur BlockMeter, h BlockTickHandler) *BlockTimer {
 	return &BlockTimer{
-		mtx: new(sync.Mutex),
 		dur: dur,
 		mul: 1,
 		div: 1,
@@ -80,7 +79,6 @@ func NewBlockTimer(dur BlockMeter, h BlockTickHandler) *BlockTimer {
 // Do not use delta handlers with pulse in this timer.
 func NewOneTickTimer(dur BlockMeter, h BlockTickHandler) *BlockTimer {
 	return &BlockTimer{
-		mtx:  new(sync.Mutex),
 		dur:  dur,
 		mul:  1,
 		div:  1,

pkg/services/notificator/nats/service.go

@@ -25,7 +25,7 @@ type Writer struct {
 	js nats.JetStreamContext
 	nc *nats.Conn
 
-	m              *sync.RWMutex
+	m              sync.RWMutex
 	createdStreams map[string]struct{}
 	opts
 }
@@ -84,7 +84,6 @@ func (n *Writer) Notify(topic string, address oid.Address) error {
 // New creates new Writer.
 func New(oo ...Option) *Writer {
 	w := &Writer{
-		m:              &sync.RWMutex{},
 		createdStreams: make(map[string]struct{}),
 		opts: opts{
 			log:   &logger.Logger{Logger: zap.L()},

pkg/services/object/get/v2/get_forwarder.go

@@ -23,8 +23,8 @@ import (
 )
 
 type getRequestForwarder struct {
-	OnceResign        *sync.Once
+	OnceResign        sync.Once
-	OnceHeaderSending *sync.Once
+	OnceHeaderSending sync.Once
 	GlobalProgress    int
 	Key               *ecdsa.PrivateKey
 	Request           *objectV2.GetRequest

pkg/services/object/get/v2/get_range_forwarder.go

@@ -23,7 +23,7 @@ import (
 )
 
 type getRangeRequestForwarder struct {
-	OnceResign     *sync.Once
+	OnceResign     sync.Once
 	GlobalProgress int
 	Key            *ecdsa.PrivateKey
 	Request        *objectV2.GetRangeRequest

pkg/services/object/get/v2/head_forwarder.go

@@ -25,7 +25,7 @@ import (
 type headRequestForwarder struct {
 	Request    *objectV2.HeadRequest
 	Response   *objectV2.HeadResponse
-	OnceResign *sync.Once
+	OnceResign sync.Once
 	ObjectAddr oid.Address
 	Key        *ecdsa.PrivateKey
 }

pkg/services/object/get/v2/util.go

@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"errors"
 	"hash"
-	"sync"
 
 	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
@@ -59,8 +58,6 @@ func (s *Service) toPrm(req *objectV2.GetRequest, stream objectSvc.GetObjectStre
 		}
 
 		forwarder := &getRequestForwarder{
-			OnceResign:        &sync.Once{},
-			OnceHeaderSending: &sync.Once{},
 			GlobalProgress: 0,
 			Key:            key,
 			Request:        req,
@@ -115,7 +112,6 @@ func (s *Service) toRangePrm(req *objectV2.GetRangeRequest, stream objectSvc.Get
 		}
 
 		forwarder := &getRangeRequestForwarder{
-			OnceResign:     &sync.Once{},
 			GlobalProgress: 0,
 			Key:            key,
 			Request:        req,
@@ -254,7 +250,6 @@ func (s *Service) toHeadPrm(req *objectV2.HeadRequest, resp *objectV2.HeadRespon
 	forwarder := &headRequestForwarder{
 		Request:    req,
 		Response:   resp,
-		OnceResign: &sync.Once{},
 		ObjectAddr: objAddr,
 		Key:        key,
 	}

pkg/services/object/search/v2/request_forwarder.go

@@ -20,7 +20,7 @@ import (
 )
 
 type requestForwarder struct {
-	OnceResign *sync.Once
+	OnceResign sync.Once
 	Request    *objectV2.SearchRequest
 	Key        *ecdsa.PrivateKey
 }

pkg/services/object/search/v2/util.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sync"
 
 	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
@@ -51,7 +50,6 @@ func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStre
 		}
 
 		forwarder := &requestForwarder{
-			OnceResign: &sync.Once{},
 			Request: req,
 			Key:     key,
 		}

pkg/services/object_manager/placement/traverser.go

@@ -29,7 +29,7 @@ type Option func(*cfg)
 // Traverser represents utility for controlling
 // traversal of object placement vectors.
 type Traverser struct {
-	mtx *sync.RWMutex
+	mtx sync.RWMutex
 
 	vectors [][]netmap.NodeInfo
 
@@ -107,7 +107,6 @@ func NewTraverser(opts ...Option) (*Traverser, error) {
 	}
 
 	return &Traverser{
-		mtx:     new(sync.RWMutex),
 		rem:     rem,
 		vectors: ns,
 	}, nil

pkg/services/session/storage/temporary/storage.go

@@ -18,7 +18,7 @@ type key struct {
 // expiring (removing) session tokens.
 // Must be created only via calling NewTokenStore.
 type TokenStore struct {
-	mtx *sync.RWMutex
+	mtx sync.RWMutex
 
 	tokens map[key]*storage.PrivateToken
 }
@@ -28,7 +28,6 @@ type TokenStore struct {
 // The elements of the instance are stored in the map.
 func NewTokenStore() *TokenStore {
 	return &TokenStore{
-		mtx:    new(sync.RWMutex),
 		tokens: make(map[key]*storage.PrivateToken),
 	}
 }