X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_list.h;h=f1e878f5a616104e61fee4deb5c99ffe60dd08f3;hb=d0ebfed83ac079f95da8bf79e64ac77f31d551ac;hp=0d8747e9efae39befdf303878a271f7380cbd0f3;hpb=cafbc1318c847b8c18e2036dc56be7af7acefa4e;p=palacios.git

diff --git a/palacios/include/palacios/vmm_list.h b/palacios/include/palacios/vmm_list.h
index 0d8747e..f1e878f 100644
--- a/palacios/include/palacios/vmm_list.h
+++ b/palacios/include/palacios/vmm_list.h
@@ -233,6 +233,53 @@ static inline void list_splice_init(struct list_head *list,
 	container_of(ptr, type, member)
 
 /**
+ * list_entry - get the struct for the tail entry
+ * @ptr:	the list_head head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_tail_entry(head, type, member) ({	\
+      type * tail = NULL;			\
+      if ((head)->prev != (head)) {			\
+	tail = list_entry((head)->prev, type, member);	\
+      }							\
+      tail;						\
+})
+
+/**
+ * list_first_entry - get the struct for the first entry
+ * @ptr:	the list_head head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_first_entry(head, type, member)			\
+({								\
+    type * first = NULL;					\
+    if ((head)->next != (head)) {				\
+	first = list_entry((head)->next, type, member);		\
+    }								\
+    first;							\
+ })
+    
+
+
+/** 
+ * list_next_entry -- get the struct for the next entry in a list
+ * @ptr:  current list entry
+ * @type: type of the struct this is embedded in
+ * @member: name of the list struct within the struct
+ */
+#define list_next_entry(node, type, member)			\
+    ({								\
+	type * next = NULL;					\
+	if ((node)->next != (node)) {				\
+	    next = list_entry((node)->next, type, member);	\
+	}							\
+	next;							\
+    })
+
+
+/**
  * list_for_each	-	iterate over a list
  * @pos:	the &struct list_head to use as a loop counter.
  * @head:	the head for your list.