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authorEric Blake <eblake@redhat.com>2016-02-17 23:48:15 -0700
committerMarkus Armbruster <armbru@redhat.com>2016-02-19 11:08:56 +0100
commitf96493b1ab14e307495119064c32765f436b349c (patch)
treee7e5b45fd954dd013523757423b1953e84216d9a /qapi/opts-visitor.c
parent9d3524b39e1fe5f3bb7a990ad7841e469e954a3b (diff)
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qapi: Simplify excess input reporting in input visitors
When reporting that an unvisited member remains at the end of an input visit for a struct, we were using g_hash_table_find() coupled with a callback function that always returns true, to locate an arbitrary member of the hash table. But if all we need is an arbitrary entry, we can get that from a single-use iterator, without needing a tautological callback function. Technically, our cast of &(GQueue *) to (void **) is not strict C (while void * must be able to hold all other pointers, nothing says a void ** has to be the same width or representation as a GQueue **). The kosher way to write it would be the verbose: void *tmp; GQueue *any; if (g_hash_table_iter_next(&iter, NULL, &tmp)) { any = tmp; But our code base (not to mention glib itself) already has other cases of assuming that ALL pointers have the same width and representation, where a compiler would have to go out of its way to mis-compile our borderline behavior. Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1455778109-6278-2-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'qapi/opts-visitor.c')
-rw-r--r--qapi/opts-visitor.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index d54f75b..ae5b955 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -157,17 +157,11 @@ opts_start_struct(Visitor *v, const char *name, void **obj,
}
-static gboolean
-ghr_true(gpointer ign_key, gpointer ign_value, gpointer ign_user_data)
-{
- return TRUE;
-}
-
-
static void
opts_end_struct(Visitor *v, Error **errp)
{
OptsVisitor *ov = to_ov(v);
+ GHashTableIter iter;
GQueue *any;
if (--ov->depth > 0) {
@@ -175,8 +169,8 @@ opts_end_struct(Visitor *v, Error **errp)
}
/* we should have processed all (distinct) QemuOpt instances */
- any = g_hash_table_find(ov->unprocessed_opts, &ghr_true, NULL);
- if (any) {
+ g_hash_table_iter_init(&iter, ov->unprocessed_opts);
+ if (g_hash_table_iter_next(&iter, NULL, (void **)&any)) {
const QemuOpt *first;
first = g_queue_peek_head(any);