qapi: New QAPI_LIST_LENGTH()

Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-ID: <20240227153321.467343-2-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com>
qemu · Mar 4, 2024 · 745736a · 745736a
1 parent 8a62ef7
commit 745736a
Showing 1 changed file with 13 additions and 0 deletions.
diff --git 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