4.0初步改造

common/ring.go

@@ -0,0 +1,36 @@
+package common
+
+import (
+	"github.com/Monibuca/engine/v4/util"
+)
+
+type RingBuffer[T any] struct {
+	*util.Ring[T]
+	Size      int
+	MoveCount uint32
+}
+
+func (rb *RingBuffer[T]) Init(n int) *RingBuffer[T] {
+	if rb == nil {
+		rb = new(RingBuffer[T])
+	}
+	rb.Ring = util.NewRing[T](n)
+	rb.Size = n
+	return rb
+}
+
+func (rb RingBuffer[T]) SubRing(rr *util.Ring[T]) *RingBuffer[T] {
+	rb.Ring = rr
+	rb.MoveCount = 0
+	return &rb
+}
+
+func (rb *RingBuffer[T]) MoveNext() *T {
+	rb.Ring = rb.Next()
+	rb.MoveCount++
+	return &rb.Value
+}
+
+func (rb *RingBuffer[T]) PreValue() *T {
+	return &rb.Prev().Value
+}