diff --git a/client/internal/cmdline/serve.go b/client/internal/cmdline/serve.go
index d29de48..e6bbb90 100644
--- a/client/internal/cmdline/serve.go
+++ b/client/internal/cmdline/serve.go
@@ -164,7 +164,9 @@ func serveHTTP(configPath string, opts serveHTTPOptions) {
 	conCol.CollectInPlace()
 
 	// 公共锁
-	publock := publock.NewService()
+	publock := publock.NewMaster()
+	publock.Start()
+	defer publock.Stop()
 
 	// 访问统计
 	acStat := accessstat.NewAccessStat(accessstat.Config{
diff --git a/client/internal/cmdline/test.go b/client/internal/cmdline/test.go
index 21bed2b..bb5707b 100644
--- a/client/internal/cmdline/test.go
+++ b/client/internal/cmdline/test.go
@@ -175,7 +175,9 @@ func test(configPath string) {
 	conCol.CollectInPlace()
 
 	// 公共锁
-	publock := publock.NewService()
+	publock := publock.NewMaster()
+	publock.Start()
+	defer publock.Stop()
 
 	// 访问统计
 	acStat := accessstat.NewAccessStat(accessstat.Config{
diff --git a/client/internal/cmdline/vfstest.go b/client/internal/cmdline/vfstest.go
index c7229af..93589e3 100644
--- a/client/internal/cmdline/vfstest.go
+++ b/client/internal/cmdline/vfstest.go
@@ -155,7 +155,9 @@ func vfsTest(configPath string, opts serveHTTPOptions) {
 	conCol.CollectInPlace()
 
 	// 公共锁
-	publock := publock.NewService()
+	publock := publock.NewMaster()
+	publock.Start()
+	defer publock.Stop()
 
 	// 访问统计
 	acStat := accessstat.NewAccessStat(accessstat.Config{
diff --git a/client/internal/downloader/iterator.go b/client/internal/downloader/iterator.go
index 009a202..646fa74 100644
--- a/client/internal/downloader/iterator.go
+++ b/client/internal/downloader/iterator.go
@@ -29,7 +29,7 @@ type downloadSpaceInfo struct {
 }
 
 type DownloadContext struct {
-	PubLock *publock.Service
+	PubLock *publock.PubLock
 }
 type DownloadObjectIterator struct {
 	OnClosing    func()
diff --git a/client/internal/http/v1/package.go b/client/internal/http/v1/package.go
index cb7a9d7..a50316a 100644
--- a/client/internal/http/v1/package.go
+++ b/client/internal/http/v1/package.go
@@ -19,7 +19,6 @@ import (
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/downloader"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/http/types"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	cliapi "gitlink.org.cn/cloudream/jcs-pub/client/sdk/api/v1"
 	"gitlink.org.cn/cloudream/jcs-pub/common/ecode"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/iterator"
@@ -400,7 +399,7 @@ func (s *PackageService) Pin(ctx *gin.Context) {
 		return
 	}
 
-	lock, err := reqbuilder.NewBuilder().Package().Pin(req.PackageID).MutexLock(s.svc.PubLock)
+	lock, err := s.svc.PubLock.BeginMutex().Package().Pin(req.PackageID).End().Lock()
 	if err != nil {
 		ctx.JSON(http.StatusOK, types.Failed(ecode.OperationFailed, "lock package: %v", err))
 		return
diff --git a/client/internal/http/v1/pub_shards.go b/client/internal/http/v1/pub_shards.go
index bc5e7f2..cc71c7e 100644
--- a/client/internal/http/v1/pub_shards.go
+++ b/client/internal/http/v1/pub_shards.go
@@ -16,7 +16,6 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/serder"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/http/types"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	cliapi "gitlink.org.cn/cloudream/jcs-pub/client/sdk/api/v1"
 	"gitlink.org.cn/cloudream/jcs-pub/common/ecode"
 	stgglb "gitlink.org.cn/cloudream/jcs-pub/common/globals"
@@ -228,7 +227,7 @@ func (s *PubShardsService) ExportPackage(ctx *gin.Context) {
 		return
 	}
 
-	lock, err := reqbuilder.NewBuilder().Package().Pin(req.PackageID).MutexLock(s.svc.PubLock)
+	lock, err := s.svc.PubLock.BeginMutex().Package().Pin(req.PackageID).End().Lock()
 	if err != nil {
 		ctx.JSON(http.StatusOK, types.Failed(ecode.OperationFailed, "lock package: %v", err))
 		return
diff --git a/client/internal/publock/core.go b/client/internal/publock/core.go
new file mode 100644
index 0000000..5368b84
--- /dev/null
+++ b/client/internal/publock/core.go
@@ -0,0 +1,197 @@
+package publock
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"time"
+
+	"gitlink.org.cn/cloudream/common/pkgs/future"
+	"gitlink.org.cn/cloudream/common/pkgs/trie"
+	"gitlink.org.cn/cloudream/common/utils/lo2"
+	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/lockprovider"
+	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
+)
+
+type Core struct {
+	lock         *sync.Mutex
+	provdersTrie *trie.Trie[types.LockProvider]
+	acquirings   []*acquireInfo
+	acquired     map[types.RequestID]types.LockRequest
+	nextReqID    int64
+}
+
+func NewCore() *Core {
+	svc := &Core{
+		lock:         &sync.Mutex{},
+		provdersTrie: trie.NewTrie[types.LockProvider](),
+		acquired:     make(map[types.RequestID]types.LockRequest),
+	}
+
+	svc.provdersTrie.Create([]any{lockprovider.UserSpaceLockPathPrefix, trie.WORD_ANY}).Value = lockprovider.NewUserSpaceLock()
+	svc.provdersTrie.Create([]any{lockprovider.PackageLockPathPrefix, trie.WORD_ANY}).Value = lockprovider.NewPackageLock()
+	return svc
+}
+
+func (s *Core) Start() {
+
+}
+
+func (s *Core) Stop() {
+
+}
+
+type acquireInfo struct {
+	Request  types.LockRequest
+	Callback *future.SetValueFuture[types.RequestID]
+	LastErr  error
+}
+
+func (svc *Core) Acquire(req types.LockRequest, opts ...AcquireOptionFn) (LockedRequest, error) {
+	var opt = AcquireOption{
+		Timeout: time.Second * 10,
+	}
+	for _, fn := range opts {
+		fn(&opt)
+	}
+
+	ctx := context.Background()
+	if opt.Timeout != 0 {
+		var cancel func()
+		ctx, cancel = context.WithTimeout(ctx, opt.Timeout)
+		defer cancel()
+	}
+
+	// 就地检测锁是否可用
+	svc.lock.Lock()
+	defer svc.lock.Unlock()
+
+	reqID, err := svc.tryAcquireOne(req)
+	if err != nil {
+		return LockedRequest{}, err
+	}
+
+	if reqID != "" {
+		svc.acquired[reqID] = req
+		return LockedRequest{
+			Req:   req,
+			ReqID: reqID,
+		}, nil
+	}
+
+	// 就地检测失败，那么就需要异步等待锁可用
+	info := &acquireInfo{
+		Request:  req,
+		Callback: future.NewSetValue[types.RequestID](),
+	}
+	svc.acquirings = append(svc.acquirings, info)
+
+	// 等待的时候不加锁
+	svc.lock.Unlock()
+	reqID, err = info.Callback.Wait(ctx)
+	svc.lock.Lock()
+
+	if err == nil {
+		svc.acquired[reqID] = req
+		return LockedRequest{
+			Req:   req,
+			ReqID: reqID,
+		}, nil
+	}
+
+	if err != future.ErrCanceled {
+		lo2.Remove(svc.acquirings, info)
+		return LockedRequest{}, err
+	}
+
+	// 如果第一次等待是超时错误，那么在锁里再尝试获取一次结果
+	reqID, err = info.Callback.TryGetValue()
+	if err == nil {
+		svc.acquired[reqID] = req
+		return LockedRequest{
+			Req:   req,
+			ReqID: reqID,
+		}, nil
+	}
+
+	lo2.Remove(svc.acquirings, info)
+	return LockedRequest{}, err
+}
+
+func (s *Core) release(reqID types.RequestID) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	req, ok := s.acquired[reqID]
+	if !ok {
+		return
+	}
+
+	s.releaseRequest(reqID, req)
+	s.tryAcquirings()
+}
+
+func (a *Core) tryAcquirings() {
+	for i := 0; i < len(a.acquirings); i++ {
+		req := a.acquirings[i]
+
+		reqID, err := a.tryAcquireOne(req.Request)
+		if err != nil {
+			req.LastErr = err
+			continue
+		}
+
+		req.Callback.SetValue(reqID)
+		a.acquirings[i] = nil
+	}
+
+	a.acquirings = lo2.RemoveAllDefault(a.acquirings)
+}
+
+func (s *Core) tryAcquireOne(req types.LockRequest) (types.RequestID, error) {
+	err := s.testOneRequest(req)
+	if err != nil {
+		return "", err
+	}
+
+	reqID := types.RequestID(fmt.Sprintf("%d", s.nextReqID))
+	s.nextReqID++
+
+	s.applyRequest(reqID, req)
+	return reqID, nil
+}
+
+func (s *Core) testOneRequest(req types.LockRequest) error {
+	for _, lock := range req.Locks {
+		n, ok := s.provdersTrie.WalkEnd(lock.Path)
+		if !ok || n.Value == nil {
+			return fmt.Errorf("lock provider not found for path %v", lock.Path)
+		}
+
+		err := n.Value.CanLock(lock)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *Core) applyRequest(reqID types.RequestID, req types.LockRequest) {
+	for _, lock := range req.Locks {
+		p, _ := s.provdersTrie.WalkEnd(lock.Path)
+		p.Value.Lock(reqID, lock)
+	}
+}
+
+func (s *Core) releaseRequest(reqID types.RequestID, req types.LockRequest) {
+	for _, lock := range req.Locks {
+		p, _ := s.provdersTrie.WalkEnd(lock.Path)
+		p.Value.Unlock(reqID, lock)
+	}
+}
+
+type LockedRequest struct {
+	Req   types.LockRequest
+	ReqID types.RequestID
+}
diff --git a/client/internal/publock/mutex.go b/client/internal/publock/mutex.go
index 85abc97..475a039 100644
--- a/client/internal/publock/mutex.go
+++ b/client/internal/publock/mutex.go
@@ -1,15 +1,34 @@
 package publock
 
 import (
+	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
 )
 
 type Mutex struct {
-	svc       *Service
-	lockReq   types.LockRequest
-	lockReqID types.RequestID
+	pub    *PubLock
+	locked LockedRequest
 }
 
 func (m *Mutex) Unlock() {
-	m.svc.release(m.lockReqID, m.lockReq)
+	m.pub.release(m.locked.ReqID)
+}
+
+type MutexBuilder struct {
+	reqbuilder.LockRequestBuilder[*MutexBuilder]
+	pub *PubLock
+}
+
+func (b *MutexBuilder) Lock(opt ...AcquireOptionFn) (*Mutex, error) {
+	lkd, err := b.pub.acquire(types.LockRequest{
+		Locks: b.Locks,
+	}, opt...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Mutex{
+		pub:    b.pub,
+		locked: lkd,
+	}, nil
 }
diff --git a/client/internal/publock/reentrant.go b/client/internal/publock/reentrant.go
index dda4bbf..ecb35f6 100644
--- a/client/internal/publock/reentrant.go
+++ b/client/internal/publock/reentrant.go
@@ -1,18 +1,22 @@
 package publock
 
-import "gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
+import (
+	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
+	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
+)
 
 type Reentrant struct {
-	svc    *Service
+	reqbuilder.LockRequestBuilder[*Reentrant]
+	p      *PubLock
 	reqs   []types.LockRequest
-	locked []*Mutex
+	locked []LockedRequest
 }
 
-func (r *Reentrant) Lock(req types.LockRequest, opt ...AcquireOptionFn) error {
+func (r *Reentrant) Lock(opt ...AcquireOptionFn) error {
 	var willLock []types.Lock
 
 loop:
-	for _, lock := range req.Locks {
+	for _, lock := range r.LockRequestBuilder.Locks {
 		for _, req := range r.reqs {
 			for _, locked := range req.Locks {
 				if locked.Equals(lock) {
@@ -23,17 +27,17 @@ loop:
 
 		willLock = append(willLock, lock)
 	}
+	r.LockRequestBuilder.Locks = nil
 
 	if len(willLock) == 0 {
 		return nil
 	}
 
 	newReq := types.LockRequest{
-		Reason: req.Reason,
-		Locks:  willLock,
+		Locks: willLock,
 	}
 
-	m, err := r.svc.Acquire(newReq, opt...)
+	m, err := r.p.acquire(newReq, opt...)
 	if err != nil {
 		return err
 	}
@@ -46,7 +50,7 @@ loop:
 
 func (r *Reentrant) Unlock() {
 	for i := len(r.reqs) - 1; i >= 0; i-- {
-		r.locked[i].Unlock()
+		r.p.release(r.locked[i].ReqID)
 	}
 	r.locked = nil
 	r.reqs = nil
diff --git a/client/internal/publock/reqbuilder/lock_request_builder.go b/client/internal/publock/reqbuilder/lock_request_builder.go
index 327b311..927bcbb 100644
--- a/client/internal/publock/reqbuilder/lock_request_builder.go
+++ b/client/internal/publock/reqbuilder/lock_request_builder.go
@@ -1,29 +1,14 @@
 package reqbuilder
 
 import (
-	"gitlink.org.cn/cloudream/common/utils/lo2"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
 )
 
-type LockRequestBuilder struct {
-	locks []types.Lock
+type LockRequestBuilder[T any] struct {
+	Locks []types.Lock
+	T     T
 }
 
-func NewBuilder() *LockRequestBuilder {
-	return &LockRequestBuilder{}
-}
-
-func (b *LockRequestBuilder) IsEmpty() bool {
-	return len(b.locks) == 0
-}
-
-func (b *LockRequestBuilder) Build() types.LockRequest {
-	return types.LockRequest{
-		Locks: lo2.ArrayClone(b.locks),
-	}
-}
-
-func (b *LockRequestBuilder) MutexLock(svc *publock.Service, opt ...publock.AcquireOptionFn) (*publock.Mutex, error) {
-	return svc.Acquire(b.Build(), opt...)
+func (b *LockRequestBuilder[T]) End() T {
+	return b.T
 }
diff --git a/client/internal/publock/reqbuilder/package.go b/client/internal/publock/reqbuilder/package.go
index 8a17e18..68ae9c7 100644
--- a/client/internal/publock/reqbuilder/package.go
+++ b/client/internal/publock/reqbuilder/package.go
@@ -8,15 +8,15 @@ import (
 	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
 )
 
-type PackageLockReqBuilder struct {
-	*LockRequestBuilder
+type PackageLockReqBuilder[T any] struct {
+	*LockRequestBuilder[T]
 }
 
-func (b *LockRequestBuilder) Package() *PackageLockReqBuilder {
-	return &PackageLockReqBuilder{LockRequestBuilder: b}
+func (b *LockRequestBuilder[T]) Package() *PackageLockReqBuilder[T] {
+	return &PackageLockReqBuilder[T]{LockRequestBuilder: b}
 }
-func (b *PackageLockReqBuilder) Buzy(pkgID jcstypes.PackageID) *PackageLockReqBuilder {
-	b.locks = append(b.locks, types.Lock{
+func (b *PackageLockReqBuilder[T]) Buzy(pkgID jcstypes.PackageID) *PackageLockReqBuilder[T] {
+	b.Locks = append(b.Locks, types.Lock{
 		Path:   b.makePath(pkgID),
 		Name:   lockprovider.PackageBuzyLock,
 		Target: lockprovider.NewEmptyTarget(),
@@ -24,8 +24,8 @@ func (b *PackageLockReqBuilder) Buzy(pkgID jcstypes.PackageID) *PackageLockReqBu
 	return b
 }
 
-func (b *PackageLockReqBuilder) Pin(pkgID jcstypes.PackageID) *PackageLockReqBuilder {
-	b.locks = append(b.locks, types.Lock{
+func (b *PackageLockReqBuilder[T]) Pin(pkgID jcstypes.PackageID) *PackageLockReqBuilder[T] {
+	b.Locks = append(b.Locks, types.Lock{
 		Path:   b.makePath(pkgID),
 		Name:   lockprovider.PackagePinLock,
 		Target: lockprovider.NewEmptyTarget(),
@@ -33,6 +33,6 @@ func (b *PackageLockReqBuilder) Pin(pkgID jcstypes.PackageID) *PackageLockReqBui
 	return b
 }
 
-func (b *PackageLockReqBuilder) makePath(pkgID jcstypes.PackageID) []string {
+func (b *PackageLockReqBuilder[T]) makePath(pkgID jcstypes.PackageID) []string {
 	return []string{lockprovider.PackageLockPathPrefix, strconv.FormatInt(int64(pkgID), 10)}
 }
diff --git a/client/internal/publock/reqbuilder/user_space.go b/client/internal/publock/reqbuilder/user_space.go
index 5ddf550..5a51323 100644
--- a/client/internal/publock/reqbuilder/user_space.go
+++ b/client/internal/publock/reqbuilder/user_space.go
@@ -8,15 +8,15 @@ import (
 	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
 )
 
-type UserSpaceLockReqBuilder struct {
-	*LockRequestBuilder
+type UserSpaceLockReqBuilder[T any] struct {
+	*LockRequestBuilder[T]
 }
 
-func (b *LockRequestBuilder) UserSpace() *UserSpaceLockReqBuilder {
-	return &UserSpaceLockReqBuilder{LockRequestBuilder: b}
+func (b *LockRequestBuilder[T]) UserSpace() *UserSpaceLockReqBuilder[T] {
+	return &UserSpaceLockReqBuilder[T]{LockRequestBuilder: b}
 }
-func (b *UserSpaceLockReqBuilder) Buzy(spaceID jcstypes.UserSpaceID) *UserSpaceLockReqBuilder {
-	b.locks = append(b.locks, types.Lock{
+func (b *UserSpaceLockReqBuilder[T]) Buzy(spaceID jcstypes.UserSpaceID) *UserSpaceLockReqBuilder[T] {
+	b.Locks = append(b.Locks, types.Lock{
 		Path:   b.makePath(spaceID),
 		Name:   lockprovider.UserSpaceBuzyLock,
 		Target: lockprovider.NewEmptyTarget(),
@@ -24,8 +24,8 @@ func (b *UserSpaceLockReqBuilder) Buzy(spaceID jcstypes.UserSpaceID) *UserSpaceL
 	return b
 }
 
-func (b *UserSpaceLockReqBuilder) GC(spaceID jcstypes.UserSpaceID) *UserSpaceLockReqBuilder {
-	b.locks = append(b.locks, types.Lock{
+func (b *UserSpaceLockReqBuilder[T]) GC(spaceID jcstypes.UserSpaceID) *UserSpaceLockReqBuilder[T] {
+	b.Locks = append(b.Locks, types.Lock{
 		Path:   b.makePath(spaceID),
 		Name:   lockprovider.UserSpaceGCLock,
 		Target: lockprovider.NewEmptyTarget(),
@@ -33,6 +33,6 @@ func (b *UserSpaceLockReqBuilder) GC(spaceID jcstypes.UserSpaceID) *UserSpaceLoc
 	return b
 }
 
-func (b *UserSpaceLockReqBuilder) makePath(hubID jcstypes.UserSpaceID) []string {
+func (b *UserSpaceLockReqBuilder[T]) makePath(hubID jcstypes.UserSpaceID) []string {
 	return []string{lockprovider.UserSpaceLockPathPrefix, strconv.FormatInt(int64(hubID), 10)}
 }
diff --git a/client/internal/publock/service.go b/client/internal/publock/service.go
index 76ee8dc..79c27c9 100644
--- a/client/internal/publock/service.go
+++ b/client/internal/publock/service.go
@@ -7,14 +7,14 @@ import (
 	"time"
 
 	"gitlink.org.cn/cloudream/common/pkgs/future"
-	"gitlink.org.cn/cloudream/common/pkgs/trie"
-	"gitlink.org.cn/cloudream/common/utils/lo2"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/lockprovider"
+	"gitlink.org.cn/cloudream/common/pkgs/logger"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/types"
+	clirpc "gitlink.org.cn/cloudream/jcs-pub/common/pkgs/rpc/client"
 )
 
 type AcquireOption struct {
 	Timeout time.Duration
+	Reason  string
 }
 
 type AcquireOptionFn func(opt *AcquireOption)
@@ -25,171 +25,214 @@ func WithTimeout(timeout time.Duration) AcquireOptionFn {
 	}
 }
 
-type Service struct {
-	lock         *sync.Mutex
-	provdersTrie *trie.Trie[types.LockProvider]
-	acquirings   []*acquireInfo
-	nextReqID    int64
+func WithReason(reason string) AcquireOptionFn {
+	return func(opt *AcquireOption) {
+		opt.Reason = reason
+	}
 }
 
-func NewService() *Service {
-	svc := &Service{
-		lock:         &sync.Mutex{},
-		provdersTrie: trie.NewTrie[types.LockProvider](),
-	}
+type PubLock struct {
+	core       *Core
+	cliCli     *clirpc.Client
+	pubChan    clirpc.PubLockMessageChan
+	lock       sync.Mutex
+	acquirings map[string]*acquireInfo
+	releasing  map[string]*releaseInfo
+	nextCtxID  int64
+}
 
-	svc.provdersTrie.Create([]any{lockprovider.UserSpaceLockPathPrefix, trie.WORD_ANY}).Value = lockprovider.NewUserSpaceLock()
-	svc.provdersTrie.Create([]any{lockprovider.PackageLockPathPrefix, trie.WORD_ANY}).Value = lockprovider.NewPackageLock()
-	return svc
+func NewMaster() *PubLock {
+	core := NewCore()
+	return &PubLock{
+		core: core,
+	}
 }
 
-type acquireInfo struct {
-	Request  types.LockRequest
-	Callback *future.SetValueFuture[types.RequestID]
-	LastErr  error
+func NewSlave(cli *clirpc.Client) *PubLock {
+	return &PubLock{
+		cliCli:     cli,
+		acquirings: make(map[string]*acquireInfo),
+		releasing:  make(map[string]*releaseInfo),
+	}
 }
 
-func (svc *Service) Acquire(req types.LockRequest, opts ...AcquireOptionFn) (*Mutex, error) {
-	var opt = AcquireOption{
-		Timeout: time.Second * 10,
+func (s *PubLock) BeginReentrant() *Reentrant {
+	r := &Reentrant{
+		p: s,
 	}
-	for _, fn := range opts {
-		fn(&opt)
+	r.T = r
+	return r
+}
+
+func (p *PubLock) BeginMutex() *MutexBuilder {
+	m := &MutexBuilder{
+		pub: p,
 	}
+	m.T = m
+	return m
+}
 
-	ctx := context.Background()
-	if opt.Timeout != 0 {
-		var cancel func()
-		ctx, cancel = context.WithTimeout(ctx, opt.Timeout)
-		defer cancel()
+func (p *PubLock) Start() {
+	if p.core != nil {
+		p.core.Start()
+		return
 	}
+}
 
-	// 就地检测锁是否可用
-	svc.lock.Lock()
-	defer svc.lock.Unlock()
+func (p *PubLock) Stop() {
+	p.lock.Lock()
+	defer p.lock.Unlock()
 
-	reqID, err := svc.tryAcquireOne(req)
-	if err != nil {
-		return nil, err
+	if p.core != nil {
+		p.core.Stop()
+		return
 	}
 
-	if reqID != "" {
-		return &Mutex{
-			svc:       svc,
-			lockReq:   req,
-			lockReqID: reqID,
-		}, nil
+	if p.pubChan != nil {
+		p.pubChan.Close()
+		p.pubChan = nil
 	}
 
-	// 就地检测失败，那么就需要异步等待锁可用
-	info := &acquireInfo{
-		Request:  req,
-		Callback: future.NewSetValue[types.RequestID](),
-	}
-	svc.acquirings = append(svc.acquirings, info)
+	p.cliCli.Release()
+	p.cliCli = nil
+}
 
-	// 等待的时候不加锁
-	svc.lock.Unlock()
-	reqID, err = info.Callback.Wait(ctx)
-	svc.lock.Lock()
+func (p *PubLock) acquire(req types.LockRequest, opts ...AcquireOptionFn) (LockedRequest, error) {
+	p.lock.Lock()
 
-	if err == nil {
-		return &Mutex{
-			svc:       svc,
-			lockReq:   req,
-			lockReqID: reqID,
-		}, nil
+	if p.core != nil {
+		p.lock.Unlock()
+		return p.core.Acquire(req, opts...)
 	}
 
-	if err != future.ErrCanceled {
-		lo2.Remove(svc.acquirings, info)
-		return nil, err
+	if p.pubChan == nil {
+		p.pubChan = p.cliCli.PubLockChannel(context.Background())
+		go p.receivingChan()
 	}
 
-	// 如果第一次等待是超时错误，那么在锁里再尝试获取一次结果
-	reqID, err = info.Callback.TryGetValue()
-	if err == nil {
-		return &Mutex{
-			svc:       svc,
-			lockReq:   req,
-			lockReqID: reqID,
-		}, nil
+	acqID := fmt.Sprintf("%v", p.nextCtxID)
+	p.nextCtxID++
+
+	cerr := p.pubChan.Send(&types.AcquireMsg{ContextID: acqID, Request: req})
+	if cerr != nil {
+		p.lock.Unlock()
+		return LockedRequest{}, cerr.ToError()
 	}
 
-	lo2.Remove(svc.acquirings, info)
-	return nil, err
-}
+	callback := future.NewSetValue[types.RequestID]()
+	info := &acquireInfo{
+		Request:  req,
+		Callback: callback,
+	}
+	p.acquirings[acqID] = info
+	p.lock.Unlock()
 
-func (s *Service) BeginReentrant() *Reentrant {
-	return &Reentrant{
-		svc: s,
+	reqID, err := callback.Wait(context.Background())
+	if err != nil {
+		return LockedRequest{}, err
 	}
+
+	return LockedRequest{
+		Req:   req,
+		ReqID: reqID,
+	}, nil
 }
 
-func (s *Service) release(reqID types.RequestID, req types.LockRequest) {
-	s.lock.Lock()
-	defer s.lock.Unlock()
+func (p *PubLock) release(reqID types.RequestID) {
+	log := logger.WithField("Mod", "PubLock")
 
-	s.releaseRequest(reqID, req)
-	s.tryAcquirings()
-}
+	p.lock.Lock()
 
-func (a *Service) tryAcquirings() {
-	for i := 0; i < len(a.acquirings); i++ {
-		req := a.acquirings[i]
+	if p.core != nil {
+		p.lock.Unlock()
+		p.core.release(reqID)
+		return
+	}
 
-		reqID, err := a.tryAcquireOne(req.Request)
-		if err != nil {
-			req.LastErr = err
-			continue
-		}
+	if p.pubChan == nil {
+		p.pubChan = p.cliCli.PubLockChannel(context.Background())
+		go p.receivingChan()
+	}
 
-		req.Callback.SetValue(reqID)
-		a.acquirings[i] = nil
+	relID := fmt.Sprintf("%v", p.nextCtxID)
+	p.nextCtxID++
+
+	cerr := p.pubChan.Send(&types.ReleaseMsg{ContextID: relID, RequestID: reqID})
+	if cerr != nil {
+		p.lock.Unlock()
+		log.Warnf("unlock %v: %v", reqID, cerr.ToError())
+		return
 	}
 
-	a.acquirings = lo2.RemoveAllDefault(a.acquirings)
-}
+	callback := future.NewSetVoid()
+	info := &releaseInfo{
+		RequestID: reqID,
+		Callback:  callback,
+	}
+	p.releasing[relID] = info
+	p.lock.Unlock()
 
-func (s *Service) tryAcquireOne(req types.LockRequest) (types.RequestID, error) {
-	err := s.testOneRequest(req)
+	err := callback.Wait(context.Background())
 	if err != nil {
-		return "", err
+		log.Warnf("unlock %v: %v", reqID, err)
+		return
 	}
 
-	reqID := types.RequestID(fmt.Sprintf("%d", s.nextReqID))
-	s.nextReqID++
-
-	s.applyRequest(reqID, req)
-	return reqID, nil
+	log.Tracef("unlock %v", reqID)
 }
 
-func (s *Service) testOneRequest(req types.LockRequest) error {
-	for _, lock := range req.Locks {
-		n, ok := s.provdersTrie.WalkEnd(lock.Path)
-		if !ok || n.Value == nil {
-			return fmt.Errorf("lock provider not found for path %v", lock.Path)
+func (p *PubLock) receivingChan() {
+	log := logger.WithField("Mod", "PubLock")
+	for {
+		msg, cerr := p.pubChan.Receive()
+		if cerr != nil {
+			p.lock.Lock()
+			for _, info := range p.acquirings {
+				info.Callback.SetError(cerr.ToError())
+			}
+			p.acquirings = make(map[string]*acquireInfo)
+
+			for _, info := range p.releasing {
+				info.Callback.SetError(cerr.ToError())
+			}
+			p.releasing = make(map[string]*releaseInfo)
+			p.lock.Unlock()
+
+			log.Warnf("receive channel error: %v", cerr.ToError())
+			return
 		}
 
-		err := n.Value.CanLock(lock)
-		if err != nil {
-			return err
+		p.lock.Lock()
+
+		switch msg := msg.(type) {
+		case *types.AcquireResultMsg:
+			info, ok := p.acquirings[msg.ContextID]
+			if !ok {
+				continue
+			}
+
+			if msg.Success {
+				info.Callback.SetValue(msg.RequestID)
+			} else {
+				info.Callback.SetError(fmt.Errorf(msg.Reason))
+			}
+			delete(p.acquirings, msg.ContextID)
+
+		case *types.ReleaseResultMsg:
+			info, ok := p.releasing[msg.ContextID]
+			if !ok {
+				continue
+			}
+
+			info.Callback.SetVoid()
+			delete(p.releasing, msg.ContextID)
 		}
-	}
-
-	return nil
-}
 
-func (s *Service) applyRequest(reqID types.RequestID, req types.LockRequest) {
-	for _, lock := range req.Locks {
-		p, _ := s.provdersTrie.WalkEnd(lock.Path)
-		p.Value.Lock(reqID, lock)
+		p.lock.Unlock()
 	}
 }
 
-func (s *Service) releaseRequest(reqID types.RequestID, req types.LockRequest) {
-	for _, lock := range req.Locks {
-		p, _ := s.provdersTrie.WalkEnd(lock.Path)
-		p.Value.Unlock(reqID, lock)
-	}
+type releaseInfo struct {
+	RequestID types.RequestID
+	Callback  *future.SetVoidFuture
 }
diff --git a/client/internal/publock/types/channel.go b/client/internal/publock/types/channel.go
new file mode 100644
index 0000000..dc53bfd
--- /dev/null
+++ b/client/internal/publock/types/channel.go
@@ -0,0 +1,30 @@
+package types
+
+type AcquireMsg struct {
+	ContextID string
+	Request   LockRequest
+}
+
+func (*AcquireMsg) IsPubLockMessage() bool { return true }
+
+type AcquireResultMsg struct {
+	ContextID string
+	Success   bool
+	Reason    string
+	RequestID RequestID
+}
+
+func (*AcquireResultMsg) IsPubLockMessage() bool { return true }
+
+type ReleaseMsg struct {
+	ContextID string
+	RequestID RequestID
+}
+
+func (*ReleaseMsg) IsPubLockMessage() bool { return true }
+
+type ReleaseResultMsg struct {
+	ContextID string
+}
+
+func (*ReleaseResultMsg) IsPubLockMessage() bool { return true }
diff --git a/client/internal/services/object.go b/client/internal/services/object.go
index 6917451..485a228 100644
--- a/client/internal/services/object.go
+++ b/client/internal/services/object.go
@@ -11,7 +11,6 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/sort2"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/downloader"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	"gitlink.org.cn/cloudream/jcs-pub/client/sdk/api/v1"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch2/ops2"
@@ -682,7 +681,7 @@ func (svc *ObjectService) CompleteMultipartUpload(objectID jcstypes.ObjectID, in
 		objBlkMap[blk.Index] = blk
 	}
 
-	lockBld := reqbuilder.NewBuilder()
+	lockBld := svc.PubLock.BeginMutex()
 
 	var compBlks []jcstypes.ObjectBlock
 	var compBlkSpaces []jcstypes.UserSpaceDetail
@@ -706,7 +705,7 @@ func (svc *ObjectService) CompleteMultipartUpload(objectID jcstypes.ObjectID, in
 		lockBld.UserSpace().Buzy(stg.UserSpace.UserSpaceID)
 	}
 
-	mutex, err := lockBld.MutexLock(svc.PubLock)
+	mutex, err := lockBld.Lock()
 	if err != nil {
 		return jcstypes.Object{}, fmt.Errorf("acquire lock: %w", err)
 	}
diff --git a/client/internal/services/service.go b/client/internal/services/service.go
index d0707c6..17d9350 100644
--- a/client/internal/services/service.go
+++ b/client/internal/services/service.go
@@ -19,7 +19,7 @@ import (
 
 // Service 结构体封装了分布锁服务和任务管理服务。
 type Service struct {
-	PubLock          *publock.Service
+	PubLock          *publock.PubLock
 	Downloader       *downloader.Downloader
 	AccessStat       *accessstat.AccessStat
 	Uploader         *uploader.Uploader
@@ -36,7 +36,7 @@ type Service struct {
 }
 
 func NewService(
-	publock *publock.Service,
+	publock *publock.PubLock,
 	downloader *downloader.Downloader,
 	accStat *accessstat.AccessStat,
 	uploder *uploader.Uploader,
diff --git a/client/internal/services/user_space.go b/client/internal/services/user_space.go
index 06338af..8be221d 100644
--- a/client/internal/services/user_space.go
+++ b/client/internal/services/user_space.go
@@ -13,7 +13,6 @@ import (
 
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/downloader/strategy"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	cliapi "gitlink.org.cn/cloudream/jcs-pub/client/sdk/api/v1"
 	"gitlink.org.cn/cloudream/jcs-pub/common/ecode"
 	stgglb "gitlink.org.cn/cloudream/jcs-pub/common/globals"
@@ -200,9 +199,9 @@ func (svc *UserSpaceService) DownloadPackage(packageID jcstypes.PackageID, users
 		return err
 	}
 
-	mutex, err := reqbuilder.NewBuilder().
-		UserSpace().Buzy(userspaceID).
-		MutexLock(svc.PubLock)
+	mutex, err := svc.PubLock.BeginMutex().
+		UserSpace().Buzy(userspaceID).End().
+		Lock()
 	if err != nil {
 		return fmt.Errorf("acquire locks failed, err: %w", err)
 	}
diff --git a/client/internal/ticktock/change_redundancy.go b/client/internal/ticktock/change_redundancy.go
index 1193b3c..bc7556e 100644
--- a/client/internal/ticktock/change_redundancy.go
+++ b/client/internal/ticktock/change_redundancy.go
@@ -8,7 +8,6 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/reflect2"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
 	"gitlink.org.cn/cloudream/jcs-pub/common/types/datamap"
 )
@@ -79,7 +78,7 @@ loop:
 				break loop
 			}
 
-			lock, err := reqbuilder.NewBuilder().Package().Buzy(id).MutexLock(t.pubLock, publock.WithTimeout(time.Second*10))
+			lock, err := t.pubLock.BeginMutex().Package().Buzy(id).End().Lock(publock.WithTimeout(time.Second * 10))
 			if err != nil {
 				log.Warnf("lock package: %v", err)
 				continue
@@ -169,11 +168,10 @@ func (j *ChangeRedundancy) changeOne(ctx *changeRedundancyContext, pkg jcstypes.
 				continue
 			}
 
-			reqBlder := reqbuilder.NewBuilder()
 			for _, space := range selectedSpaces {
-				reqBlder.UserSpace().Buzy(space.UserSpace.UserSpace.UserSpaceID)
+				reen.UserSpace().Buzy(space.UserSpace.UserSpace.UserSpaceID)
 			}
-			err := reen.Lock(reqBlder.Build())
+			err := reen.Lock()
 			if err != nil {
 				log.WithField("ObjectID", obj.Object.ObjectID).Warnf("acquire lock: %s", err.Error())
 				continue
diff --git a/client/internal/ticktock/redundancy_shrink.go b/client/internal/ticktock/redundancy_shrink.go
index 9299c04..ca8518a 100644
--- a/client/internal/ticktock/redundancy_shrink.go
+++ b/client/internal/ticktock/redundancy_shrink.go
@@ -15,7 +15,6 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/sort2"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	"gitlink.org.cn/cloudream/jcs-pub/common/consts"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch2"
@@ -918,11 +917,10 @@ func (t *ChangeRedundancy) generateSysEventForECObject(solu annealingSolution, o
 }
 
 func (t *ChangeRedundancy) executePlans(ctx *changeRedundancyContext, planBld *exec.PlanBuilder, planningSpaceIDs map[jcstypes.UserSpaceID]bool, reen *publock.Reentrant) (exec.PlanResult, error) {
-	reqBlder := reqbuilder.NewBuilder()
 	for id, _ := range planningSpaceIDs {
-		reqBlder.UserSpace().Buzy(id)
+		reen.UserSpace().Buzy(id)
 	}
-	err := reen.Lock(reqBlder.Build())
+	err := reen.Lock()
 	if err != nil {
 		return exec.PlanResult{}, fmt.Errorf("locking shard resources: %w", err)
 	}
diff --git a/client/internal/ticktock/ticktock.go b/client/internal/ticktock/ticktock.go
index c15f52e..a081432 100644
--- a/client/internal/ticktock/ticktock.go
+++ b/client/internal/ticktock/ticktock.go
@@ -32,11 +32,11 @@ type TickTock struct {
 	spaceMeta  *metacache.UserSpaceMeta
 	stgPool    *pool.Pool
 	evtPub     *sysevent.Publisher
-	pubLock    *publock.Service
+	pubLock    *publock.PubLock
 	speedStats *speedstats.SpeedStats
 }
 
-func New(cfg Config, db *db.DB, spaceMeta *metacache.UserSpaceMeta, stgPool *pool.Pool, evtPub *sysevent.Publisher, pubLock *publock.Service, speedStats *speedstats.SpeedStats) *TickTock {
+func New(cfg Config, db *db.DB, spaceMeta *metacache.UserSpaceMeta, stgPool *pool.Pool, evtPub *sysevent.Publisher, pubLock *publock.PubLock, speedStats *speedstats.SpeedStats) *TickTock {
 	sch, _ := gocron.NewScheduler()
 	t := &TickTock{
 		cfg:        cfg,
diff --git a/client/internal/ticktock/user_space_gc.go b/client/internal/ticktock/user_space_gc.go
index 1c879fb..330b369 100644
--- a/client/internal/ticktock/user_space_gc.go
+++ b/client/internal/ticktock/user_space_gc.go
@@ -8,8 +8,6 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/reflect2"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
-
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 )
 
 type UserSpaceGC struct {
@@ -47,7 +45,7 @@ func (j *UserSpaceGC) Execute(t *TickTock) {
 func (j *UserSpaceGC) gcOne(t *TickTock, space *jcstypes.UserSpaceDetail) {
 	log := logger.WithType[UserSpaceGC]("Event")
 
-	mutex, err := reqbuilder.NewBuilder().UserSpace().GC(space.UserSpace.UserSpaceID).MutexLock(t.pubLock)
+	mutex, err := t.pubLock.BeginMutex().UserSpace().GC(space.UserSpace.UserSpaceID).End().Lock()
 	if err != nil {
 		log.Warnf("acquire lock: %v", err)
 		return
diff --git a/client/internal/uploader/uploader.go b/client/internal/uploader/uploader.go
index 2577e77..67eca83 100644
--- a/client/internal/uploader/uploader.go
+++ b/client/internal/uploader/uploader.go
@@ -14,7 +14,6 @@ import (
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/metacache"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	stgglb "gitlink.org.cn/cloudream/jcs-pub/common/globals"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/connectivity"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
@@ -26,14 +25,14 @@ import (
 )
 
 type Uploader struct {
-	pubLock      *publock.Service
+	pubLock      *publock.PubLock
 	connectivity *connectivity.Collector
 	stgPool      *pool.Pool
 	spaceMeta    *metacache.UserSpaceMeta
 	db           *db.DB
 }
 
-func NewUploader(pubLock *publock.Service, connectivity *connectivity.Collector, stgPool *pool.Pool, spaceMeta *metacache.UserSpaceMeta, db *db.DB) *Uploader {
+func NewUploader(pubLock *publock.PubLock, connectivity *connectivity.Collector, stgPool *pool.Pool, spaceMeta *metacache.UserSpaceMeta, db *db.DB) *Uploader {
 	return &Uploader{
 		pubLock:      pubLock,
 		connectivity: connectivity,
@@ -99,7 +98,7 @@ func (u *Uploader) BeginUpdate(pkgID jcstypes.PackageID, affinity jcstypes.UserS
 	target := u.chooseUploadStorage(uploadSpaces, affinity)
 
 	// 防止上传的副本被清除
-	pubLock, err := reqbuilder.NewBuilder().UserSpace().Buzy(target.Space.UserSpace.UserSpaceID).MutexLock(u.pubLock)
+	pubLock, err := u.pubLock.BeginMutex().UserSpace().Buzy(target.Space.UserSpace.UserSpaceID).End().Lock()
 	if err != nil {
 		return nil, fmt.Errorf("acquire lock: %w", err)
 	}
@@ -160,11 +159,11 @@ func (u *Uploader) BeginCreateUpload(bktID jcstypes.BucketID, pkgName string, co
 		return nil, fmt.Errorf("create package: %w", err)
 	}
 
-	reqBld := reqbuilder.NewBuilder()
+	reqBld := u.pubLock.BeginMutex()
 	for _, stg := range spacesStgs {
 		reqBld.UserSpace().Buzy(stg.UserSpace.UserSpaceID)
 	}
-	lock, err := reqBld.MutexLock(u.pubLock)
+	lock, err := reqBld.Lock()
 	if err != nil {
 		return nil, fmt.Errorf("acquire lock: %w", err)
 	}
@@ -244,7 +243,7 @@ func (u *Uploader) UploadPart(objID jcstypes.ObjectID, index int, stream io.Read
 		space = u.chooseUploadStorage(userStgs, 0).Space
 	}
 
-	lock, err := reqbuilder.NewBuilder().UserSpace().Buzy(space.UserSpace.UserSpaceID).MutexLock(u.pubLock)
+	lock, err := u.pubLock.BeginMutex().UserSpace().Buzy(space.UserSpace.UserSpaceID).End().Lock()
 	if err != nil {
 		return fmt.Errorf("acquire lock: %w", err)
 	}
diff --git a/client/internal/uploader/user_space_upload.go b/client/internal/uploader/user_space_upload.go
index bb6bae8..fa92f9e 100644
--- a/client/internal/uploader/user_space_upload.go
+++ b/client/internal/uploader/user_space_upload.go
@@ -9,7 +9,6 @@ import (
 
 	"github.com/samber/lo"
 	"gitlink.org.cn/cloudream/jcs-pub/client/internal/db"
-	"gitlink.org.cn/cloudream/jcs-pub/client/internal/publock/reqbuilder"
 	stgglb "gitlink.org.cn/cloudream/jcs-pub/common/globals"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
 	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch2"
@@ -105,7 +104,7 @@ func (u *Uploader) UserSpaceUpload(userSpaceID jcstypes.UserSpaceID, rootPath jc
 		return nil, fmt.Errorf("getting base store: %w", err)
 	}
 
-	mutex, err := reqbuilder.NewBuilder().UserSpace().Buzy(srcSpace.UserSpace.UserSpaceID).Buzy(targetSapce.Space.UserSpace.UserSpaceID).MutexLock(u.pubLock)
+	mutex, err := u.pubLock.BeginMutex().UserSpace().Buzy(srcSpace.UserSpace.UserSpaceID).Buzy(targetSapce.Space.UserSpace.UserSpaceID).End().Lock()
 	if err != nil {
 		delPkg()
 		return nil, fmt.Errorf("acquire lock: %w", err)
diff --git a/common/pkgs/rpc/channel.go b/common/pkgs/rpc/channel.go
index f4ac0c7..2424c92 100644
--- a/common/pkgs/rpc/channel.go
+++ b/common/pkgs/rpc/channel.go
@@ -1,6 +1,8 @@
 package rpc
 
 import (
+	"sync"
+
 	"gitlink.org.cn/cloudream/common/utils/serder"
 	"gitlink.org.cn/cloudream/jcs-pub/common/ecode"
 )
@@ -50,6 +52,7 @@ type bidChanClient[Recv, Send any] struct {
 	cli      BidChannelAPIClient
 	cancelFn func()
 	lastErr  *CodeError
+	lock     sync.Mutex
 }
 
 func NewBidChanClient[Recv, Send any](cli BidChannelAPIClient, cancelFn func()) BidChan[Recv, Send] {
@@ -57,8 +60,12 @@ func NewBidChanClient[Recv, Send any](cli BidChannelAPIClient, cancelFn func())
 }
 
 func (c *bidChanClient[Recv, Send]) Send(val Send) *CodeError {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
 	if c.lastErr != nil {
-		return c.lastErr
+		err := c.lastErr
+		return err
 	}
 
 	data, err := serder.ObjectToJSONEx(val)
@@ -67,11 +74,17 @@ func (c *bidChanClient[Recv, Send]) Send(val Send) *CodeError {
 		c.lastErr = Failed(ecode.OperationFailed, err.Error())
 		return Failed(ecode.OperationFailed, err.Error())
 	}
+	c.lock.Unlock()
 
 	err = c.cli.Send(&Request{Payload: data})
+
+	c.lock.Lock()
+
 	if err != nil {
 		c.cancelFn()
-		c.lastErr = getCodeError(err)
+		if c.lastErr == nil {
+			c.lastErr = getCodeError(err)
+		}
 		return c.lastErr
 	}
 
@@ -79,31 +92,50 @@ func (c *bidChanClient[Recv, Send]) Send(val Send) *CodeError {
 }
 
 func (c *bidChanClient[Recv, Send]) Receive() (Recv, *CodeError) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
 	if c.lastErr != nil {
 		var def Recv
 		return def, c.lastErr
 	}
 
+	c.lock.Unlock()
 	resp, err := c.cli.Recv()
+	c.lock.Lock()
+
 	if err != nil {
 		c.cancelFn()
-		c.lastErr = getCodeError(err)
+
+		cerr := getCodeError(err)
+		if c.lastErr == nil {
+			c.lastErr = cerr
+		}
+
 		var def Recv
-		return def, c.lastErr
+		return def, cerr
 	}
 
 	resp2, err := serder.JSONToObjectEx[Recv](resp.Payload)
 	if err != nil {
 		c.cancelFn()
-		c.lastErr = Failed(ecode.OperationFailed, err.Error())
+
+		cerr := Failed(ecode.OperationFailed, err.Error())
+		if c.lastErr == nil {
+			c.lastErr = cerr
+		}
+
 		var def Recv
-		return def, c.lastErr
+		return def, cerr
 	}
 
 	return resp2, nil
 }
 
 func (c *bidChanClient[Recv, Send]) Close() {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
 	if c.lastErr != nil {
 		return
 	}
@@ -113,6 +145,9 @@ func (c *bidChanClient[Recv, Send]) Close() {
 }
 
 func (c *bidChanClient[Recv, Send]) CloseWithError(err *CodeError) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
 	if c.lastErr != nil {
 		return
 	}
@@ -125,6 +160,7 @@ type bidChanServer[Recv, Send any] struct {
 	svr     BidChannelAPIServer
 	errChan chan *CodeError
 	lastErr *CodeError
+	lock    sync.Mutex
 }
 
 func NewBidChanServer[Recv, Send any](svr BidChannelAPIServer, errChan chan *CodeError) BidChan[Recv, Send] {
@@ -132,6 +168,9 @@ func NewBidChanServer[Recv, Send any](svr BidChannelAPIServer, errChan chan *Cod
 }
 
 func (s *bidChanServer[Recv, Send]) Send(val Send) *CodeError {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
 	if s.lastErr != nil {
 		return s.lastErr
 	}
@@ -140,43 +179,67 @@ func (s *bidChanServer[Recv, Send]) Send(val Send) *CodeError {
 	if err != nil {
 		s.lastErr = Failed(ecode.OperationFailed, err.Error())
 		s.errChan <- s.lastErr
-		return Failed(ecode.OperationFailed, err.Error())
+		return s.lastErr
 	}
+
+	s.lock.Unlock()
 	err = s.svr.Send(&Response{Payload: data})
+	s.lock.Lock()
+
 	if err != nil {
-		s.lastErr = getCodeError(err)
-		s.errChan <- s.lastErr
-		return s.lastErr
+		cerr := getCodeError(err)
+		if s.lastErr == nil {
+			s.lastErr = cerr
+			s.errChan <- cerr
+		}
+		return cerr
 	}
 
 	return nil
 }
 
 func (s *bidChanServer[Recv, Send]) Receive() (Recv, *CodeError) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
 	if s.lastErr != nil {
 		var def Recv
 		return def, s.lastErr
 	}
 
+	s.lock.Unlock()
 	req, err := s.svr.Recv()
+	s.lock.Lock()
+
 	if err != nil {
-		s.lastErr = getCodeError(err)
-		s.errChan <- s.lastErr
+		cerr := getCodeError(err)
+		if s.lastErr == nil {
+			s.lastErr = cerr
+			s.errChan <- cerr
+		}
+
 		var def Recv
-		return def, s.lastErr
+		return def, cerr
 	}
 
 	req2, err := serder.JSONToObjectEx[Recv](req.Payload)
 	if err != nil {
-		s.lastErr = Failed(ecode.OperationFailed, err.Error())
-		s.errChan <- s.lastErr
+		cerr := Failed(ecode.OperationFailed, err.Error())
+		if s.lastErr == nil {
+			s.lastErr = cerr
+			s.errChan <- cerr
+		}
+
 		var def Recv
-		return def, s.lastErr
+		return def, cerr
 	}
 
 	return req2, nil
 }
 func (s *bidChanServer[Recv, Send]) Close() {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
 	if s.lastErr != nil {
 		return
 	}
@@ -186,6 +249,9 @@ func (s *bidChanServer[Recv, Send]) Close() {
 }
 
 func (s *bidChanServer[Recv, Send]) CloseWithError(err *CodeError) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
 	if s.lastErr != nil {
 		return
 	}