From 51e72bc1dd6ace6e91d675f41a1f09bd00ab8043 Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Fri, 29 Jan 2016 06:48:54 -0700 Subject: qapi: Swap visit_* arguments for consistent 'name' placement MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake Reviewed-by: Marc-André Lureau Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster --- hw/virtio/virtio-balloon.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'hw/virtio/virtio-balloon.c') diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index 7d05d3fc96..b46cb580a0 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -120,21 +120,21 @@ static void balloon_stats_get_all(Object *obj, Visitor *v, VirtIOBalloon *s = opaque; int i; - visit_start_struct(v, NULL, "guest-stats", name, 0, &err); + visit_start_struct(v, name, NULL, "guest-stats", 0, &err); if (err) { goto out; } - visit_type_int(v, &s->stats_last_update, "last-update", &err); + visit_type_int(v, "last-update", &s->stats_last_update, &err); if (err) { goto out_end; } - visit_start_struct(v, NULL, NULL, "stats", 0, &err); + visit_start_struct(v, "stats", NULL, NULL, 0, &err); if (err) { goto out_end; } for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) { - visit_type_uint64(v, &s->stats[i], balloon_stat_names[i], &err); + visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err); if (err) { break; } @@ -156,7 +156,7 @@ static void balloon_stats_get_poll_interval(Object *obj, Visitor *v, Error **errp) { VirtIOBalloon *s = opaque; - visit_type_int(v, &s->stats_poll_interval, name, errp); + visit_type_int(v, name, &s->stats_poll_interval, errp); } static void balloon_stats_set_poll_interval(Object *obj, Visitor *v, @@ -167,7 +167,7 @@ static void balloon_stats_set_poll_interval(Object *obj, Visitor *v, Error *local_err = NULL; int64_t value; - visit_type_int(v, &value, name, &local_err); + visit_type_int(v, name, &value, &local_err); if (local_err) { error_propagate(errp, local_err); return; -- cgit v1.2.3