Re: [Qemu-devel] [PATCH v2 1/4] qapi/qnull: Add own header

[Markus Armbruster <armbru@redhat.com>]

Max Reitz <mreitz@redhat.com> writes:

> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  include/qapi/qmp/qnull.h   | 26 ++++++++++++++++++++++++++
>  include/qapi/qmp/qobject.h |  8 --------
>  include/qapi/qmp/types.h   |  1 +
>  qobject/qnull.c            |  1 +
>  target/i386/cpu.c          |  6 +-----
>  tests/check-qnull.c        |  2 +-
>  6 files changed, 30 insertions(+), 14 deletions(-)
>  create mode 100644 include/qapi/qmp/qnull.h
>
> diff --git a/include/qapi/qmp/qnull.h b/include/qapi/qmp/qnull.h
> new file mode 100644
> index 0000000..69555ac
> --- /dev/null
> +++ b/include/qapi/qmp/qnull.h
> @@ -0,0 +1,26 @@
> +/*
> + * QNull Module
> + *
> + * Copyright (C) 2009, 2017 Red Hat Inc.
> + *
> + * Authors:
> + *  Luiz Capitulino <lcapitulino@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
> + * See the COPYING.LIB file in the top-level directory.

Copy the boilerplate from qnull.c instead, factual correctness.

> + */
> +
> +#ifndef QNULL_H
> +#define QNULL_H
> +
> +#include "qapi/qmp/qobject.h"
> +
> +extern QObject qnull_;
> +
> +static inline QObject *qnull(void)
> +{
> +    qobject_incref(&qnull_);
> +    return &qnull_;
> +}
> +
> +#endif /* QNULL_H */

Meh, another tiny header.  Are our compiles too fast?

> diff --git a/include/qapi/qmp/qobject.h b/include/qapi/qmp/qobject.h
> index b8ddbca..ef1d1a9 100644
> --- a/include/qapi/qmp/qobject.h
> +++ b/include/qapi/qmp/qobject.h
> @@ -93,12 +93,4 @@ static inline QType qobject_type(const QObject *obj)
>      return obj->type;
>  }
>  
> -extern QObject qnull_;
> -
> -static inline QObject *qnull(void)
> -{
> -    qobject_incref(&qnull_);
> -    return &qnull_;
> -}
> -
>  #endif /* QOBJECT_H */
> diff --git a/include/qapi/qmp/types.h b/include/qapi/qmp/types.h
> index 27cfbd8..4c87182 100644
> --- a/include/qapi/qmp/types.h
> +++ b/include/qapi/qmp/types.h
> @@ -20,5 +20,6 @@
>  #include "qapi/qmp/qstring.h"
>  #include "qapi/qmp/qdict.h"
>  #include "qapi/qmp/qlist.h"
> +#include "qapi/qmp/qnull.h"
>  
>  #endif /* QAPI_QMP_TYPES_H */
> diff --git a/qobject/qnull.c b/qobject/qnull.c
> index c124d05..b3cc85e 100644
> --- a/qobject/qnull.c
> +++ b/qobject/qnull.c
> @@ -13,6 +13,7 @@
>  #include "qemu/osdep.h"
>  #include "qemu-common.h"
>  #include "qapi/qmp/qobject.h"

Let's drop this include, like you do in check-qnull.c below.

> +#include "qapi/qmp/qnull.h"
>  
>  QObject qnull_ = {
>      .type = QTYPE_QNULL,
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index b2b1d20..f118a54 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -29,11 +29,7 @@
>  #include "qemu/option.h"
>  #include "qemu/config-file.h"
>  #include "qapi/qmp/qerror.h"
> -#include "qapi/qmp/qstring.h"
> -#include "qapi/qmp/qdict.h"
> -#include "qapi/qmp/qbool.h"
> -#include "qapi/qmp/qint.h"
> -#include "qapi/qmp/qfloat.h"
> +#include "qapi/qmp/types.h"

qapi/qmp/types.h is a lazy way to increase compile times by including
more than you need.  One day I'll kill it.  Until then, I tolerate it in
.c, but not in .h.

>  
>  #include "qapi-types.h"
>  #include "qapi-visit.h"
> diff --git a/tests/check-qnull.c b/tests/check-qnull.c
> index 8dd1c96..4a67b9a 100644
> --- a/tests/check-qnull.c
> +++ b/tests/check-qnull.c
> @@ -8,7 +8,7 @@
>   */
>  #include "qemu/osdep.h"
>  
> -#include "qapi/qmp/qobject.h"
> +#include "qapi/qmp/qnull.h"
>  #include "qemu-common.h"
>  #include "qapi/qobject-input-visitor.h"
>  #include "qapi/qobject-output-visitor.h"

With the boilerplate corrected and the superfluous include in qnull.c
deleted
Reviewed-by: Markus Armbruster <armbru@redhat.com>