Mark 0 as a reserved work group identifier.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/glibext/workqueue.c b/src/glibext/workqueue.c
index ad6ede6..fe7f1bb 100644
--- a/src/glibext/workqueue.c
+++ b/src/glibext/workqueue.c
@@ -247,8 +247,13 @@ wgroup_id_t g_work_queue_define_group(GWorkQueue *queue, guint count)
 
     do
     {
-        result = queue->generator++;
+        result = ++queue->generator;
+
+        if (result == INVALID_GROUP_ID)
+            continue;
+
         created = g_work_queue_ensure_group_exists(queue, result, count);
+
     }
     while (!created);