Add brief description of double ended queue struct.

1 files changed, 11 insertions, 0 deletions

diff --git a/collections/double_ended_queue.c b/collections/double_ended_queue.c
index 29c8873..25f3181 100644
--- a/collections/double_ended_queue.c
+++ b/collections/double_ended_queue.c
@@ -11,6 +11,17 @@
  * (resize, push, etc.)
  */
 
+/*TODO
+ * Fix empty vs totally full ambiquity
+ */
+
+/* Double ended queue as a circular buffer
+ * base is pointer to buffer.
+ * beg is where the first element is stored.
+ * end is where the last element is stored.
+ * limit is the maximum number of elements.
+ */
+
 struct double_ended_queue {
 	void **base, **end, **beg;
 	int limit;