[v9] Live Update

[PATCH V9 12/46] qapi: QAPI_LIST_LENGTH

Steve Sistare posted 46 patches 3 years, 1 month ago

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[PATCH V9 12/46] qapi: QAPI_LIST_LENGTH

Posted by Steve Sistare 3 years, 1 month ago

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 7d88b09..75dddca 100644
--- a/include/qapi/util.h
+++ b/include/qapi/util.h
@@ -65,4 +65,17 @@ struct strList *strList_from_string(const char *in, char delim);
     (tail) = &(*(tail))->next; \
 } while (0)
 
+/*
+ * For any GenericList @list, return its length.
+ */
+#define QAPI_LIST_LENGTH(list) \
+    ({ \
+        int len = 0; \
+        typeof(list) elem; \
+        for (elem = list; elem != NULL; elem = elem->next) { \
+            len++; \
+        } \
+        len; \
+    })
+
 #endif
-- 
1.8.3.1