first commit

txflow/interfaces.go

@@ -0,0 +1,49 @@
+package txflow
+
+import "sync"
+
+type Position struct {
+	X, Y, Z float64
+	World   string
+}
+
+type World interface {
+	Name() string
+	Exec(func(Tx))
+}
+
+type Tx interface {
+	World() World
+}
+
+type Entity interface {
+	Teleport(Position)
+}
+
+type Handle interface {
+	Entity(tx Tx) (Entity, bool)
+	ExecWorld(func(tx Tx, e Entity))
+}
+
+type WorldResolver interface {
+	Resolve(name string) (World, error)
+}
+
+type SafeBox[T any] struct {
+	mu sync.RWMutex
+	v  T
+}
+
+func (s *SafeBox[T]) Set(v T) {
+	s.mu.Lock()
+	s.v = v
+	s.mu.Unlock()
+}
+
+func (s *SafeBox[T]) Get() T {
+	s.mu.RLock()
+	v := s.v
+	s.mu.RUnlock()
+	return v
+}
+