[PATCH v5 01/12] qapi: Move GenericList to qapi/util.h

[Eric Blake]

Placing GenericList in util.h will make it easier for the next patch
to promote QAPI_LIST_ADD() into a public macro without requiring more
files to include the unrelated visitor.h.

However, we can't also move GenericAlternate; this is because it would
introduce a circular dependency: qapi-builtin-types.h needs a complete
definition of QEnumLookup (so it includes qapi/util.h), and
GenericAlternate needs a complete definition of QType (declared in
qapi-builtin-types.h).  Leaving GenericAlternate in visitor.h breaks
the cycle, and doesn't matter since we don't have any further planned
uses for that type outside of visitors.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 include/qapi/visitor.h | 9 +--------
 include/qapi/util.h    | 8 ++++++++
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h
index ebc19ede7fff..8c2e1c29ad8b 100644
--- a/include/qapi/visitor.h
+++ b/include/qapi/visitor.h
@@ -16,6 +16,7 @@
 #define QAPI_VISITOR_H

 #include "qapi/qapi-builtin-types.h"
+#include "qapi/util.h"

 /*
  * The QAPI schema defines both a set of C data types, and a QMP wire
@@ -228,14 +229,6 @@

 /*** Useful types ***/

-/* This struct is layout-compatible with all other *List structs
- * created by the QAPI generator.  It is used as a typical
- * singly-linked list. */
-typedef struct GenericList {
-    struct GenericList *next;
-    char padding[];
-} GenericList;
-
 /* This struct is layout-compatible with all Alternate types
  * created by the QAPI generator. */
 typedef struct GenericAlternate {
diff --git a/include/qapi/util.h b/include/qapi/util.h
index a7c3c6414874..50201896c7a4 100644
--- a/include/qapi/util.h
+++ b/include/qapi/util.h
@@ -11,6 +11,14 @@
 #ifndef QAPI_UTIL_H
 #define QAPI_UTIL_H

+/* This struct is layout-compatible with all other *List structs
+ * created by the QAPI generator.  It is used as a typical
+ * singly-linked list. */
+typedef struct GenericList {
+    struct GenericList *next;
+    char padding[];
+} GenericList;
+
 typedef struct QEnumLookup {
     const char *const *array;
     int size;
-- 
2.29.0