Convert our usage of go-diodes into a simplified, generic version

utils/diodes/diodes.go

@@ -0,0 +1,38 @@
+package diodes
+
+import (
+	"context"
+
+	"code.cloudfoundry.org/go-diodes"
+)
+
+type Diode[T any] struct {
+	d *diodes.Waiter
+}
+
+type Alerter = diodes.Alerter
+
+type AlertFunc = diodes.AlertFunc
+
+func New[T any](ctx context.Context, size int, alerter Alerter) *Diode[T] {
+	return &Diode[T]{
+		d: diodes.NewWaiter(diodes.NewOneToOne(size, alerter), diodes.WithWaiterContext(ctx)),
+	}
+}
+
+func (d *Diode[T]) Put(data T) {
+	d.d.Set(diodes.GenericDataType(&data))
+}
+
+func (d *Diode[T]) TryNext() (*T, bool) {
+	data, ok := d.d.TryNext()
+	if !ok {
+		return nil, ok
+	}
+	return (*T)(data), true
+}
+
+func (d *Diode[T]) Next() *T {
+	data := d.d.Next()
+	return (*T)(data)
+}