Fix #1842: Port AbstractPromise and add as override for 2.11.8.

nicolasstucki · nicolasstucki · commit e054734de7af · 2016-03-15T11:35:54.000+01:00
diff --git a/scalalib/overrides-2.11.8/scala/concurrent/impl/AbstractPromise.scala b/scalalib/overrides-2.11.8/scala/concurrent/impl/AbstractPromise.scala
@@ -0,0 +1,11 @@
+package scala.concurrent.impl
+
+import java.util.concurrent.atomic.AtomicReference
+
+@Deprecated // Since 2.11.8. Extend java.util.concurrent.atomic.AtomicReference instead.
+abstract class AbstractPromise extends AtomicReference[AnyRef] {
+  protected final def updateState(oldState: AnyRef, newState: AnyRef): Boolean =
+    compareAndSet(oldState, newState)
+
+  protected final def getState(): AnyRef = get()
+}
