DGLock and DGUnlock implementation.

These methods haven't been fully tested, but they compile and pass a few
simple tests.

1 files changed, 13 insertions, 0 deletions

diff --git a/litmus/locking.c b/litmus/locking.c
index 55529064f7ca..65fd51f2c80a 100644
--- a/litmus/locking.c
+++ b/litmus/locking.c
@@ -169,6 +169,19 @@ struct task_struct* __waitqueue_remove_first(wait_queue_head_t *wq)
         return(t);
 }
 
+struct task_struct* __waitqueue_peek_first(wait_queue_head_t *wq)
+{
+        wait_queue_t* q;
+        struct task_struct* t = NULL;
+
+        if (waitqueue_active(wq)) {
+                q = list_entry(wq->task_list.next,
+                               wait_queue_t, task_list);
+                t = (struct task_struct*) q->private;
+        }
+        return(t);
+}
+
 unsigned int __add_wait_queue_prio_exclusive(
         wait_queue_head_t* head,
         prio_wait_queue_t *new)