changes: TINF-175 TZPC-4722

[platform/upstream/libgee.git] / gee / queue.vala

diff --git a/gee/queue.vala b/gee/queue.vala
index 787f80a..3658e67 100644 (file)
--- a/gee/queue.vala
+++ b/gee/queue.vala
@@ -43,6 +43,7 @@
  * inserted into a Queue, as ``null`` is also used as a special return value by
  * the poll method to indicate that the queue contains no elements.
  */
+[GenericAccessors]
 public interface Gee.Queue<G> : Collection<G> {
 
        /**
@@ -73,7 +74,9 @@ public interface Gee.Queue<G> : Collection<G> {
         *
         * @return        ``true`` if the element was added to the queue
         */
-       public abstract bool offer (G element);
+       public virtual bool offer (G element) {
+               return add (element);
+       }
 
        /**
         * Peeks (retrieves, but not remove) an element from this queue.
@@ -100,5 +103,13 @@ public interface Gee.Queue<G> : Collection<G> {
         *
         * @return          the amount of elements that were actually drained
         */
-       public abstract int drain (Collection<G> recipient, int amount = -1);
+       public virtual int drain (Collection<G> recipient, int amount = -1) {
+               G? item = null;
+               int drained = 0;
+               while((amount == -1 || --amount >= 0) && (item = poll ()) != null) {
+                       recipient.add (item);
+                       drained++;
+               }
+               return drained;
+       }
 }