diff mbox

[v9,17/37] qapi: Drop unused 'kind' for struct/enum visit

Message ID 1453219845-30939-18-git-send-email-eblake@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Eric Blake Jan. 19, 2016, 4:10 p.m. UTC
visit_start_struct() and visit_type_enum() had a 'kind' argument
that was usually set to either the stringized version of the
corresponding qapi type name, or to NULL (although some clients
didn't even get that right).  But nothing ever used the argument.
It's even hard to argue that it would be useful in a debugger,
as a stack backtrace also tells which type is being visited.

Therefore, drop the 'kind' argument as dead.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

---
v9: no change
v8: rebase to 'name' motion
v7: new patch
---
 hmp.c                       |  2 +-
 hw/core/qdev-properties.c   |  6 ++----
 hw/ppc/spapr_drc.c          |  4 ++--
 hw/virtio/virtio-balloon.c  |  4 ++--
 include/qapi/visitor-impl.h | 11 ++++-------
 include/qapi/visitor.h      |  5 ++---
 qapi/opts-visitor.c         |  2 +-
 qapi/qapi-dealloc-visitor.c |  6 ++----
 qapi/qapi-visit-core.c      | 16 +++++++---------
 qapi/qmp-input-visitor.c    |  2 +-
 qapi/qmp-output-visitor.c   |  3 +--
 qom/object.c                |  8 ++++----
 scripts/qapi-event.py       |  2 +-
 scripts/qapi-visit.py       | 12 ++++++------
 vl.c                        |  2 +-
 15 files changed, 37 insertions(+), 48 deletions(-)

Comments

Markus Armbruster Jan. 20, 2016, 6:59 p.m. UTC | #1
Eric Blake <eblake@redhat.com> writes:

> visit_start_struct() and visit_type_enum() had a 'kind' argument
> that was usually set to either the stringized version of the
> corresponding qapi type name, or to NULL (although some clients
> didn't even get that right).  But nothing ever used the argument.
> It's even hard to argue that it would be useful in a debugger,
> as a stack backtrace also tells which type is being visited.
>
> Therefore, drop the 'kind' argument as dead.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> ---
> v9: no change
> v8: rebase to 'name' motion
> v7: new patch
> ---
>  hmp.c                       |  2 +-
>  hw/core/qdev-properties.c   |  6 ++----
>  hw/ppc/spapr_drc.c          |  4 ++--
>  hw/virtio/virtio-balloon.c  |  4 ++--
>  include/qapi/visitor-impl.h | 11 ++++-------
>  include/qapi/visitor.h      |  5 ++---
>  qapi/opts-visitor.c         |  2 +-
>  qapi/qapi-dealloc-visitor.c |  6 ++----
>  qapi/qapi-visit-core.c      | 16 +++++++---------
>  qapi/qmp-input-visitor.c    |  2 +-
>  qapi/qmp-output-visitor.c   |  3 +--
>  qom/object.c                |  8 ++++----
>  scripts/qapi-event.py       |  2 +-
>  scripts/qapi-visit.py       | 12 ++++++------
>  vl.c                        |  2 +-
>  15 files changed, 37 insertions(+), 48 deletions(-)
[...]
> diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
> index 0257359..6abfda7 100644
> --- a/include/qapi/visitor-impl.h
> +++ b/include/qapi/visitor-impl.h
> @@ -19,7 +19,7 @@ struct Visitor
>  {
>      /* Must be set */
>      void (*start_struct)(Visitor *v, const char *name, void **obj,
> -                         const char *kind, size_t size, Error **errp);
> +                         size_t size, Error **errp);
>      void (*end_struct)(Visitor *v, Error **errp);
>
>      void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
> @@ -31,8 +31,7 @@ struct Visitor
>      void (*end_list)(Visitor *v, Error **errp);
>
>      void (*type_enum)(Visitor *v, const char *name, int *obj,
> -                      const char * const strings[], const char *kind,
> -                      Error **errp);
> +                      const char *const strings[], Error **errp);
>      /* May be NULL; only needed for input visitors. */
>      void (*get_next_type)(Visitor *v, const char *name, QType *type,
>                            bool promote_int, Error **errp);
> @@ -62,10 +61,8 @@ struct Visitor
>  };
>
>  void input_type_enum(Visitor *v, const char *name, int *obj,
> -                     const char * const strings[], const char *kind,
> -                     Error **errp);
> +                     const char *const strings[], Error **errp);
>  void output_type_enum(Visitor *v, const char *name, int *obj,
> -                      const char * const strings[], const char *kind,
> -                      Error **errp);
> +                      const char *const strings[], Error **errp);
>
>  #endif
> diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h
> index eb50116..4abc180 100644
> --- a/include/qapi/visitor.h
> +++ b/include/qapi/visitor.h
> @@ -28,7 +28,7 @@ typedef struct GenericList
>  } GenericList;
>
>  void visit_start_struct(Visitor *v, const char *name, void **obj,
> -                        const char *kind, size_t size, Error **errp);
> +                        size_t size, Error **errp);
>  void visit_end_struct(Visitor *v, Error **errp);
>  void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
>                                   Error **errp);
> @@ -54,8 +54,7 @@ bool visit_optional(Visitor *v, const char *name, bool *present);
>  void visit_get_next_type(Visitor *v, const char *name, QType *type,
>                           bool promote_int, Error **errp);
>  void visit_type_enum(Visitor *v, const char *name, int *obj,
> -                     const char *const strings[], const char *kind,
> -                     Error **errp);
> +                     const char *const strings[], Error **errp);
>  void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp);
>  void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
>                        Error **errp);

Looks good.  We should be able to rely on the compiler to check the
changes to callers.

[...]
> diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
> index 7bc3de6..b0452cf 100644
> --- a/qapi/qapi-visit-core.c
> +++ b/qapi/qapi-visit-core.c
> @@ -2,6 +2,7 @@
>   * Core Definitions for QAPI Visitor Classes
>   *
>   * Copyright IBM, Corp. 2011
> + * Copyright (C) 2015 Red Hat, Inc.

2012-2015 would be more accurate.

>   *
>   * Authors:
>   *  Anthony Liguori   <aliguori@us.ibm.com>
[...]
diff mbox

Patch

diff --git a/hmp.c b/hmp.c
index 3beea3a..a4b74df 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1669,7 +1669,7 @@  void hmp_object_add(Monitor *mon, const QDict *qdict)
     pdict = qdict_clone_shallow(qdict);
     v = opts_get_visitor(ov);

-    visit_start_struct(v, NULL, NULL, NULL, 0, &err);
+    visit_start_struct(v, NULL, NULL, 0, &err);
     if (err) {
         goto out_clean;
     }
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index de927c6..e7c7719 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -48,8 +48,7 @@  static void get_enum(Object *obj, Visitor *v, const char *name, void *opaque,
     Property *prop = opaque;
     int *ptr = qdev_get_prop_ptr(dev, prop);

-    visit_type_enum(v, prop->name, ptr, prop->info->enum_table,
-                    prop->info->name, errp);
+    visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
 }

 static void set_enum(Object *obj, Visitor *v, const char *name, void *opaque,
@@ -64,8 +63,7 @@  static void set_enum(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }

-    visit_type_enum(v, prop->name, ptr, prop->info->enum_table,
-                    prop->info->name, errp);
+    visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
 }

 /* Bit */
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 9ef603b..78d71e2 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -259,7 +259,7 @@  static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
     void *fdt;

     if (!drc->fdt) {
-        visit_start_struct(v, name, NULL, NULL, 0, &err);
+        visit_start_struct(v, name, NULL, 0, &err);
         if (!err) {
             visit_end_struct(v, &err);
         }
@@ -282,7 +282,7 @@  static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
         case FDT_BEGIN_NODE:
             fdt_depth++;
             name = fdt_get_name(fdt, fdt_offset, &name_len);
-            visit_start_struct(v, name, NULL, NULL, 0, &err);
+            visit_start_struct(v, name, NULL, 0, &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index dc44088..24ecd87 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -117,7 +117,7 @@  static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
     VirtIOBalloon *s = opaque;
     int i;

-    visit_start_struct(v, name, NULL, "guest-stats", 0, &err);
+    visit_start_struct(v, name, NULL, 0, &err);
     if (err) {
         goto out;
     }
@@ -126,7 +126,7 @@  static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
         goto out_end;
     }

-    visit_start_struct(v, "stats", NULL, NULL, 0, &err);
+    visit_start_struct(v, "stats", NULL, 0, &err);
     if (err) {
         goto out_end;
     }
diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index 0257359..6abfda7 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -19,7 +19,7 @@  struct Visitor
 {
     /* Must be set */
     void (*start_struct)(Visitor *v, const char *name, void **obj,
-                         const char *kind, size_t size, Error **errp);
+                         size_t size, Error **errp);
     void (*end_struct)(Visitor *v, Error **errp);

     void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
@@ -31,8 +31,7 @@  struct Visitor
     void (*end_list)(Visitor *v, Error **errp);

     void (*type_enum)(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp);
+                      const char *const strings[], Error **errp);
     /* May be NULL; only needed for input visitors. */
     void (*get_next_type)(Visitor *v, const char *name, QType *type,
                           bool promote_int, Error **errp);
@@ -62,10 +61,8 @@  struct Visitor
 };

 void input_type_enum(Visitor *v, const char *name, int *obj,
-                     const char * const strings[], const char *kind,
-                     Error **errp);
+                     const char *const strings[], Error **errp);
 void output_type_enum(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp);
+                      const char *const strings[], Error **errp);

 #endif
diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h
index eb50116..4abc180 100644
--- a/include/qapi/visitor.h
+++ b/include/qapi/visitor.h
@@ -28,7 +28,7 @@  typedef struct GenericList
 } GenericList;

 void visit_start_struct(Visitor *v, const char *name, void **obj,
-                        const char *kind, size_t size, Error **errp);
+                        size_t size, Error **errp);
 void visit_end_struct(Visitor *v, Error **errp);
 void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
                                  Error **errp);
@@ -54,8 +54,7 @@  bool visit_optional(Visitor *v, const char *name, bool *present);
 void visit_get_next_type(Visitor *v, const char *name, QType *type,
                          bool promote_int, Error **errp);
 void visit_type_enum(Visitor *v, const char *name, int *obj,
-                     const char *const strings[], const char *kind,
-                     Error **errp);
+                     const char *const strings[], Error **errp);
 void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp);
 void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
                       Error **errp);
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index b1c8e50..6d4a91e 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -124,7 +124,7 @@  opts_visitor_insert(GHashTable *unprocessed_opts, const QemuOpt *opt)


 static void
-opts_start_struct(Visitor *v, const char *name, void **obj, const char *kind,
+opts_start_struct(Visitor *v, const char *name, void **obj,
                   size_t size, Error **errp)
 {
     OptsVisitor *ov = to_ov(v);
diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c
index b521f7c..49e7cf0 100644
--- a/qapi/qapi-dealloc-visitor.c
+++ b/qapi/qapi-dealloc-visitor.c
@@ -59,8 +59,7 @@  static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
 }

 static void qapi_dealloc_start_struct(Visitor *v, const char *name, void **obj,
-                                      const char *kind, size_t unused,
-                                      Error **errp)
+                                      size_t unused, Error **errp)
 {
     QapiDeallocVisitor *qov = to_qov(v);
     qapi_dealloc_push(qov, obj);
@@ -164,8 +163,7 @@  static void qapi_dealloc_type_anything(Visitor *v, const char *name,
 }

 static void qapi_dealloc_type_enum(Visitor *v, const char *name, int *obj,
-                                   const char * const strings[],
-                                   const char *kind, Error **errp)
+                                   const char * const strings[], Error **errp)
 {
 }

diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 7bc3de6..b0452cf 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -2,6 +2,7 @@ 
  * Core Definitions for QAPI Visitor Classes
  *
  * Copyright IBM, Corp. 2011
+ * Copyright (C) 2015 Red Hat, Inc.
  *
  * Authors:
  *  Anthony Liguori   <aliguori@us.ibm.com>
@@ -18,9 +19,9 @@ 
 #include "qapi/visitor-impl.h"

 void visit_start_struct(Visitor *v, const char *name, void **obj,
-                        const char *kind, size_t size, Error **errp)
+                        size_t size, Error **errp)
 {
-    v->start_struct(v, name, obj, kind, size, errp);
+    v->start_struct(v, name, obj, size, errp);
 }

 void visit_end_struct(Visitor *v, Error **errp)
@@ -90,10 +91,9 @@  void visit_get_next_type(Visitor *v, const char *name, QType *type,
 }

 void visit_type_enum(Visitor *v, const char *name, int *obj,
-                     const char *const strings[], const char *kind,
-                     Error **errp)
+                     const char *const strings[], Error **errp)
 {
-    v->type_enum(v, name, obj, strings, kind, errp);
+    v->type_enum(v, name, obj, strings, errp);
 }

 void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp)
@@ -227,8 +227,7 @@  void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
 }

 void output_type_enum(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp)
+                      const char * const strings[], Error **errp)
 {
     int i = 0;
     int value = *obj;
@@ -246,8 +245,7 @@  void output_type_enum(Visitor *v, const char *name, int *obj,
 }

 void input_type_enum(Visitor *v, const char *name, int *obj,
-                     const char * const strings[], const char *kind,
-                     Error **errp)
+                     const char * const strings[], Error **errp)
 {
     Error *local_err = NULL;
     int64_t value = 0;
diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c
index de77740..bf25249 100644
--- a/qapi/qmp-input-visitor.c
+++ b/qapi/qmp-input-visitor.c
@@ -115,7 +115,7 @@  static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp)
 }

 static void qmp_input_start_struct(Visitor *v, const char *name, void **obj,
-                                   const char *kind, size_t size, Error **errp)
+                                   size_t size, Error **errp)
 {
     QmpInputVisitor *qiv = to_qiv(v);
     QObject *qobj = qmp_input_get_object(qiv, name, true);
diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c
index af600a9..db5e618 100644
--- a/qapi/qmp-output-visitor.c
+++ b/qapi/qmp-output-visitor.c
@@ -111,8 +111,7 @@  static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name,
 }

 static void qmp_output_start_struct(Visitor *v, const char *name, void **obj,
-                                    const char *kind, size_t unused,
-                                    Error **errp)
+                                    size_t unused, Error **errp)
 {
     QmpOutputVisitor *qov = to_qov(v);
     QDict *dict = qdict_new();
diff --git a/qom/object.c b/qom/object.c
index 55b3955..e5b0566 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1244,7 +1244,7 @@  int object_property_get_enum(Object *obj, const char *name,
     siv = string_input_visitor_new(str);
     string_output_visitor_cleanup(sov);
     visit_type_enum(string_input_get_visitor(siv), name, &ret,
-                    enumprop->strings, NULL, errp);
+                    enumprop->strings, errp);

     g_free(str);
     string_input_visitor_cleanup(siv);
@@ -1915,7 +1915,7 @@  static void property_get_enum(Object *obj, Visitor *v, const char *name,
         return;
     }

-    visit_type_enum(v, name, &value, prop->strings, NULL, errp);
+    visit_type_enum(v, name, &value, prop->strings, errp);
 }

 static void property_set_enum(Object *obj, Visitor *v, const char *name,
@@ -1925,7 +1925,7 @@  static void property_set_enum(Object *obj, Visitor *v, const char *name,
     int value;
     Error *err = NULL;

-    visit_type_enum(v, name, &value, prop->strings, NULL, &err);
+    visit_type_enum(v, name, &value, prop->strings, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -2006,7 +2006,7 @@  static void property_get_tm(Object *obj, Visitor *v, const char *name,
         goto out;
     }

-    visit_start_struct(v, name, NULL, "struct tm", 0, &err);
+    visit_start_struct(v, name, NULL, 0, &err);
     if (err) {
         goto out;
     }
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py
index fd03e38..a1dca29 100644
--- a/scripts/qapi-event.py
+++ b/scripts/qapi-event.py
@@ -63,7 +63,7 @@  def gen_event_send(name, arg_type):
     qov = qmp_output_visitor_new();
     v = qmp_output_get_visitor(qov);

-    visit_start_struct(v, "%(name)s", NULL, NULL, 0, &err);
+    visit_start_struct(v, "%(name)s", NULL, 0, &err);
 ''',
                      name=name)
         ret += gen_err_check()
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index ca28b08..8a741b6 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -122,7 +122,7 @@  void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
 {
     Error *err = NULL;

-    visit_start_struct(v, name, (void **)obj, "%(name)s", sizeof(%(c_name)s), &err);
+    visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
     if (err) {
         goto out;
     }
@@ -138,7 +138,7 @@  out:
     error_propagate(errp, err);
 }
 ''',
-                 name=name, c_name=c_name(name))
+                 c_name=c_name(name))

     return ret

@@ -183,11 +183,11 @@  def gen_visit_enum(name):
 void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s *obj, Error **errp)
 {
     int tmp = *obj;
-    visit_type_enum(v, name, &tmp, %(c_name)s_lookup, "%(name)s", errp);
+    visit_type_enum(v, name, &tmp, %(c_name)s_lookup, errp);
     *obj = tmp;
 }
 ''',
-                 c_name=c_name(name), name=name)
+                 c_name=c_name(name))


 def gen_visit_alternate(name, variants):
@@ -259,7 +259,7 @@  void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
 {
     Error *err = NULL;

-    visit_start_struct(v, name, (void **)obj, "%(name)s", sizeof(%(c_name)s), &err);
+    visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
     if (err) {
         goto out;
     }
@@ -267,7 +267,7 @@  void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
         goto out_obj;
     }
 ''',
-                 c_name=c_name(name), name=name)
+                 c_name=c_name(name))

     if base:
         ret += mcgen('''
diff --git a/vl.c b/vl.c
index 49ec0de..22062b5 100644
--- a/vl.c
+++ b/vl.c
@@ -2834,7 +2834,7 @@  static int object_create(void *opaque, QemuOpts *opts, Error **errp)
     pdict = qemu_opts_to_qdict(opts, NULL);
     v = opts_get_visitor(ov);

-    visit_start_struct(v, NULL, NULL, NULL, 0, &err);
+    visit_start_struct(v, NULL, NULL, 0, &err);
     if (err) {
         goto out;
     }