From: Jan Beulich <jbeulich@suse.com>
To: Oleksandr <olekstysh@gmail.com>
Cc: sstabellini@kernel.org, Wei Liu <wl@xen.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
julien.grall@arm.com, xen-devel@lists.xenproject.org,
Volodymyr_Babchuk@epam.com
Subject: Re: [Xen-devel] [PATCH V3 4/8] xen/common: Introduce xrealloc_flex_struct() helper macros
Date: Thu, 29 Aug 2019 09:21:47 +0200 [thread overview]
Message-ID: <4b09510d-6961-3071-493e-53bba9536aa1@suse.com> (raw)
In-Reply-To: <4c7a381c-6f9c-3fd1-82e2-76f6b829d4ef@gmail.com>
On 28.08.2019 20:23, Oleksandr wrote:
> --- a/xen/include/xen/xmalloc.h
> +++ b/xen/include/xen/xmalloc.h
> @@ -35,6 +35,18 @@
> #define xzalloc_array(_type, _num) \
> ((_type *)_xzalloc_array(sizeof(_type), __alignof__(_type), _num))
>
> +/* Allocate space for a structure with a flexible array of typed
> objects. */
> +#define xmalloc_flex_struct(type, field, nr) \
> + ((type *)_xmalloc(offsetof(type, field[nr]), __alignof__(type)))
> +
> +/* Re-allocate space for a structure with a flexible array of typed
> objects. */
> +#define xrealloc_flex_struct(ptr, type, field, nr)
> ({ \
> + typeof(*(ptr)) *ptr_ =
> (ptr); \
> + /* Type checking: make sure that incoming pointer is of correct
> type */ \
> + (void)((ptr) == (type
> *)0); \
> + (type *)_xrealloc(ptr_, offsetof(type, field[nr]),
> __alignof__(type)); \
> +})
> +
What about
#define xrealloc_flex_struct(ptr, field, nr) \
(typeof(ptr))_xrealloc(ptr, offsetof(typeof(*(ptr)), field[nr]), \
__alignof__(typeof(*(ptr))))
?
Jan
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next prev parent reply other threads:[~2019-08-29 7:22 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-20 18:09 [Xen-devel] [PATCH V3 0/8] iommu/arm: Add Renesas IPMMU-VMSA support + Linux's iommu_fwspec Oleksandr Tyshchenko
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 1/8] iommu/arm: Add iommu_helpers.c file to keep common for IOMMUs stuff Oleksandr Tyshchenko
2019-09-09 11:45 ` Julien Grall
2019-09-09 14:12 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 2/8] iommu/arm: Add ability to handle deferred probing request Oleksandr Tyshchenko
2019-09-09 12:24 ` Julien Grall
2019-09-09 14:19 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 3/8] xen/common: Introduce _xrealloc function Oleksandr Tyshchenko
2019-08-21 8:09 ` Paul Durrant
2019-08-21 14:36 ` Oleksandr
2019-08-21 15:47 ` Paul Durrant
2019-08-21 17:04 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 4/8] xen/common: Introduce xrealloc_flex_struct() helper macros Oleksandr Tyshchenko
2019-08-27 13:28 ` Jan Beulich
2019-08-28 18:23 ` Oleksandr
2019-08-29 7:21 ` Jan Beulich [this message]
2019-08-29 19:04 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 5/8] iommu/arm: Add lightweight iommu_fwspec support Oleksandr Tyshchenko
2019-09-09 14:36 ` Julien Grall
2019-09-09 14:41 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 6/8] iommu: Add of_xlate callback Oleksandr Tyshchenko
2019-08-27 13:30 ` Jan Beulich
2019-08-27 14:59 ` Oleksandr
2019-08-27 15:11 ` Jan Beulich
2019-09-09 12:37 ` Julien Grall
2019-09-09 14:28 ` Oleksandr
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 7/8] iommu/arm: Introduce iommu_add_dt_device API Oleksandr Tyshchenko
2019-09-09 15:04 ` Julien Grall
2019-09-09 15:48 ` Oleksandr
2019-09-10 13:34 ` Oleksandr
2019-09-10 14:30 ` Julien Grall
2019-08-20 18:09 ` [Xen-devel] [PATCH V3 8/8] iommu/arm: Add Renesas IPMMU-VMSA support Oleksandr Tyshchenko
2019-08-29 8:37 ` Yoshihiro Shimoda
2019-08-29 10:56 ` Oleksandr
2019-09-02 7:04 ` Yoshihiro Shimoda
2019-09-09 14:33 ` Oleksandr
2019-08-29 11:19 ` Oleksandr
2019-09-09 21:24 ` Julien Grall
2019-09-10 11:04 ` Oleksandr
2019-09-10 14:31 ` Julien Grall
2019-09-11 15:29 ` Oleksandr
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