GODT-1657: Stable sync (still needs more tests)

internal/safe/slice.go

@@ -0,0 +1,53 @@
+package safe
+
+import "sync"
+
+type Slice[Val any] struct {
+	data []Val
+	lock sync.RWMutex
+}
+
+func NewSlice[Val any](from []Val) *Slice[Val] {
+	s := &Slice[Val]{
+		data: make([]Val, len(from)),
+	}
+
+	copy(s.data, from)
+
+	return s
+}
+
+func (s *Slice[Val]) Get(fn func(data []Val)) {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	fn(s.data)
+}
+
+func (s *Slice[Val]) GetErr(fn func(data []Val) error) error {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	return fn(s.data)
+}
+
+func (s *Slice[Val]) Set(data []Val) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	s.data = data
+}
+
+func GetSlice[Val, Ret any](s *Slice[Val], fn func(data []Val) Ret) Ret {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	return fn(s.data)
+}
+
+func GetSliceErr[Val, Ret any](s *Slice[Val], fn func(data []Val) (Ret, error)) (Ret, error) {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	return fn(s.data)
+}