Check for valid fdsos in a dgl request.

Apply bitwise operations to quickly check if the set of resources
requested are contained within one group.

1 files changed, 13 insertions, 0 deletions

diff --git a/include/litmus/locking.h b/include/litmus/locking.h
index 203466933f3c..8e501c326b8b 100644
--- a/include/litmus/locking.h
+++ b/include/litmus/locking.h
@@ -5,6 +5,8 @@
 
 struct litmus_lock_ops;
 
+extern struct fdso_ops generic_lock_ops;
+
 /* Generic base struct for LITMUS^RT userspace semaphores.
  * This structure should be embedded in protocol-specific semaphores.
  */
@@ -34,4 +36,15 @@ struct litmus_lock_ops {
         void (*deallocate)(struct litmus_lock*);
 };
 
+static inline bool is_lock(struct od_table_entry* entry)
+{
+        return entry->class == &generic_lock_ops;
+}
+
+static inline struct litmus_lock* get_lock(struct od_table_entry* entry)
+{
+        BUG_ON(!is_lock(entry));
+        return (struct litmus_lock*) entry->obj->obj;
+}
+
 #endif