[Qemu-devel] [PATCH v5 2/6] queue: Add macro for incremental traversal

[Lluís Vilanova]

Adds macro QTAILQ_FOREACH_CONTINUE to support incremental list
traversal.

Signed-off-by: Lluís Vilanova <address@hidden>
---
 include/qemu/queue.h |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/qemu/queue.h b/include/qemu/queue.h
index 342073fb4d..ea6130f1c9 100644
--- a/include/qemu/queue.h
+++ b/include/qemu/queue.h
@@ -415,6 +415,18 @@ struct {                                                   
             \
                 (var);                                                  \
                 (var) = ((var)->field.tqe_next))
 
+/**
+ * QTAILQ_FOREACH_CONTINUE:
+ * @var: Variable to resume iteration from.
+ * @field: Field in @var holding a QTAILQ_ENTRY for this queue.
+ *
+ * Resumes iteration on a queue from the element in @var.
+ */
+#define QTAILQ_FOREACH_CONTINUE(var, field)                             \
+        for ((var) = ((var)->field.tqe_next);                           \
+                (var);                                                  \
+                (var) = ((var)->field.tqe_next))
+
 #define QTAILQ_FOREACH_SAFE(var, head, field, next_var)                 \
         for ((var) = ((head)->tqh_first);                               \
                 (var) && ((next_var) = ((var)->field.tqe_next), 1);     \