[PATCH V5 2/5] qapi: QAPI_LIST_LENGTH

[Steve Sistare <steven.sistare@oracle.com>]

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/qapi/util.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/qapi/util.h b/include/qapi/util.h
index 81a2b13..20dfea8 100644
--- a/include/qapi/util.h
+++ b/include/qapi/util.h
@@ -56,4 +56,17 @@ int parse_qapi_name(const char *name, bool complete);
     (tail) = &(*(tail))->next; \
 } while (0)
 
+/*
+ * For any GenericList @list, return its length.
+ */
+#define QAPI_LIST_LENGTH(list)                                      \
+    ({                                                              \
+        size_t _len = 0;                                            \
+        typeof(list) _tail;                                         \
+        for (_tail = list; _tail != NULL; _tail = _tail->next) {    \
+            _len++;                                                 \
+        }                                                           \
+        _len;                                                       \
+    })
+
 #endif
-- 
1.8.3.1