WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: [PATCH]: change libxl IDL to export a saner interface fo

To: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH]: change libxl IDL to export a saner interface for upcoming language bindings
From: Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>
Date: Thu, 9 Sep 2010 14:39:39 +0100
Cc: Vincent Hanquez <Vincent.Hanquez@xxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
Delivery-date: Thu, 09 Sep 2010 06:42:23 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1284039445.14311.4310.camel@xxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <1284037653.17452.74.camel@xxxxxxxxxxxxxxxxxxxxxx> <1284039445.14311.4310.camel@xxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Thu, 2010-09-09 at 14:37 +0100, Ian Campbell wrote:
> On Thu, 2010-09-09 at 14:07 +0100, Gianni Tedesco wrote:
> > Firstly remove an anonymous union in libxl_device_pci structure which
> > was making auto-generating language bindings more complicated than
> > necessary and exporting random bits of low level ABI that libxl that
> > would rather hide anyway. There is a corresponding (untested) change to
> > the ocaml binding which maintains previous ml API.
> > 
> > Also make the libxl_file_reference type a Builtin. This is a 'semantic
> > correctness' issue in that libxl ABI/API won't change. But it makes it
> > so that when the IDL is used to generate language bindings that a
> > file_reference type is not exported.
> 
> You forgot to mention the addition of the Numbers type.

Ah yes

> Otherwise:
> 
> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> 
> > -libxl_file_reference = Struct("file_reference",[
> > -    ("path", string, False,
> > -"""Path is always set if the file reference is valid. However if
> > -mapped is true then the actual file may already be unlinked."""),
> > -    ("mapped", integer),
> > -    ("data", void),
> > -    ("size", size_t)], autogenerate_destructor=False)
> > +libxl_file_reference = Builtin("file_reference",
> > +                               autogenerate_destructor=False,
> > +                               
> > destructor_fn="libxl_file_reference_destroy",
> > +                               passby=PASS_BY_REFERENCE)
> 
> autogenerate_destructor=False doesn't do much on a Builtin in any case
> since we never generate destructors for builtins. It should probably
> just be a default in the base type.

Oh right, fair enough.

> i.e. cumulatively on your patch:
> 
> Subject: libxl: Builtin types default to autogenerate_destructor=False
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> 
> diff -r fe1050a60d8f -r c2b17bd27d7d tools/libxl/libxl.idl
> --- a/tools/libxl/libxl.idl   Thu Sep 09 14:32:34 2010 +0100
> +++ b/tools/libxl/libxl.idl   Thu Sep 09 14:34:45 2010 +0100
> @@ -14,6 +14,7 @@ libxl_nic_type = Number("nic_type", name
>  
>  libxl_string_list = Builtin("string_list", 
> destructor_fn="libxl_string_list_destroy", passby=PASS_BY_REFERENCE)
>  libxl_key_value_list = Builtin("key_value_list", 
> destructor_fn="libxl_key_value_list_destroy", passby=PASS_BY_REFERENCE)
> +libxl_file_reference = Builtin("file_reference", 
> destructor_fn="libxl_file_reference_destroy", passby=PASS_BY_REFERENCE)
>  
>  libxl_cpumap = Builtin("cpumap", destructor_fn="free")
>  
> @@ -78,11 +79,6 @@ libxl_domain_create_info = Struct("domai
>      ("poolid",       uint32),
>      ("poolname",     string),
>      ])
> -
> -libxl_file_reference = Builtin("file_reference",
> -                               autogenerate_destructor=False,
> -                               destructor_fn="libxl_file_reference_destroy",
> -                               passby=PASS_BY_REFERENCE)
>  
>  libxl_domain_build_info = Struct("domain_build_info",[
>      ("max_vcpus",       integer),
> diff -r fe1050a60d8f -r c2b17bd27d7d tools/libxl/libxltypes.py
> --- a/tools/libxl/libxltypes.py       Thu Sep 09 14:32:34 2010 +0100
> +++ b/tools/libxl/libxltypes.py       Thu Sep 09 14:34:45 2010 +0100
> @@ -33,6 +33,7 @@ class Builtin(Type):
>      """Builtin type"""
>      def __init__(self, typename, **kwargs):
>          kwargs.setdefault('destructor_fn', None)
> +        kwargs.setdefault('autogenerate_destructor', False)
>          Type.__init__(self, typename, **kwargs)
>  
>  class Number(Builtin):
> 
> 
> 



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel