Add store_mode and platform Clash mode selector

common/urltest/urltest.go

@@ -10,7 +10,6 @@ import (
 
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
-	"github.com/sagernet/sing/common/x/list"
 )
 
 type History struct {
@@ -21,7 +20,7 @@ type History struct {
 type HistoryStorage struct {
 	access       sync.RWMutex
 	delayHistory map[string]*History
-	callbacks    list.List[func()]
+	updateHook   chan<- struct{}
 }
 
 func NewHistoryStorage() *HistoryStorage {
@@ -30,16 +29,8 @@ func NewHistoryStorage() *HistoryStorage {
 	}
 }
 
-func (s *HistoryStorage) AddListener(listener func()) *list.Element[func()] {
-	s.access.Lock()
-	defer s.access.Unlock()
-	return s.callbacks.PushBack(listener)
-}
-
-func (s *HistoryStorage) RemoveListener(element *list.Element[func()]) {
-	s.access.Lock()
-	defer s.access.Unlock()
-	s.callbacks.Remove(element)
+func (s *HistoryStorage) SetHook(hook chan<- struct{}) {
+	s.updateHook = hook
 }
 
 func (s *HistoryStorage) LoadURLTestHistory(tag string) *History {
@@ -66,13 +57,20 @@ func (s *HistoryStorage) StoreURLTestHistory(tag string, history *History) {
 }
 
 func (s *HistoryStorage) notifyUpdated() {
-	s.access.RLock()
-	defer s.access.RUnlock()
-	for element := s.callbacks.Front(); element != nil; element = element.Next() {
-		element.Value()
+	updateHook := s.updateHook
+	if updateHook != nil {
+		select {
+		case updateHook <- struct{}{}:
+		default:
+		}
 	}
 }
 
+func (s *HistoryStorage) Close() error {
+	s.updateHook = nil
+	return nil
+}
+
 func URLTest(ctx context.Context, link string, detour N.Dialer) (t uint16, err error) {
 	if link == "" {
 		link = "https://www.gstatic.com/generate_204"