Re: [Orbit-python-list] Exception handling inside C modules.

[Johan D. <zil...@ho...>]

s=F6n 2001-09-30 klockan 08.41 skrev Dominik Smog=F3r:
> Hello everyone.
>=20
>=20
> For last few days I've been trying to wrap some libOAF functions for use
> with
>=20
> Python. Everything went flawlessly until it came to execption handling.
> libOAF
>=20
> calls just return plain CORBA_Evironment and it would be best to just
> behave as
>=20
> if the call was made in orbit-python, that is raise python exception=20
>=20
> created by orbit-python during parsing of oaf.idl (import OAF).=20
>=20
> Therefore I exposed check_corba_ex function into public header (patch
> included).
>=20
> The problem is that calling it from my module causes python to SEGV soon
> after.
>=20
> Is there any special semantics connected with this function? Or maybe
> there is
>=20
> some better way of dealing with CORBA exceptions in C python modules?
>=20
> Regards,
> Domink.
> ----
>=20
Instead of using ORBit-Python's CORBA_Environment, just create a new
one.

But i have already wrapped most parts of oaf in my oafmodule.
It can be found in bonobo-python module in GNOME CVS.
Fortunately you must have bonobo atm.


> --- orbit-python.h	Sun Jun 10 17:00:36 2001
> +++ /usr/src/RPM/BUILD/orbit-python-0.3.0-2/src/orbit-python.h	Sun Sep 30=
 01:42:47 2001
> @@ -23,7 +23,7 @@
>  typedef struct {
>     PyObject_HEAD
>     CORBA_TypeCode tc;=09
> -	char *repo_id;
> +  char *repo_id;
>  } CORBA_TypeCode_PyObject;
> =20
> =20
> @@ -79,7 +79,9 @@
>         =20
>  	PyTypeObject *poam_type;
>  	POAManager_PyObject *(*poam_new)(PortableServer_POAManager o);
> -
> +=09
> +	CORBA_boolean (*checkex)(CORBA_Environment* ev);
> +	PyObject *OPExc, *OPSysExt, *OPUsrExt;
>  } _ORBitPython_FunctionStruct;
>  =09
>  #ifdef INSIDE_PYORBIT
> @@ -141,6 +143,12 @@
>  #define PyORBit_POAManager_Check(v) ((v)->ob_type =3D=3D _ORBitPython_AP=
I->poam_type)
>  #define PyORBit_POAManager_Type     *(_ORBitPython_API->poam_type)
>  #define PyORBit_POAManager_Get(o)   (((POAManager_PyObject*)(o))->obj)  =
=20
> +
> +#define PyORBit_CORBA_Environment_Query   _ORBitPython_API->checkex
> +
> +#define PyORBit_Exception   (_ORBitPython_API->OPExc)
> +#define PyORBit_SystemException (_ORBitPython_API->OPSysExt)
> +#define PyORBit_UserException (_ORBitPython_API->OPUsrExt)
> =20
>  #define init_orbit_python() \
>  { \
> --- CORBAmodule.c	Thu Aug 16 22:19:26 2001
> +++ /usr/src/RPM/BUILD/orbit-python-0.3.0-2/src/CORBAmodule.c	Fri Sep 28 =
15:18:32 2001
> @@ -380,7 +380,10 @@
> =20
>  	&CORBA_TypeCode_PyObject_Type,  CORBA_TypeCode_PyObject__new,
>  	&POA_PyObject_Type,             POA_Object_to_PyObject,
> -	&POAManager_PyObject_Type,      POAManager_Object_to_PyObject
> +	&POAManager_PyObject_Type,      POAManager_Object_to_PyObject,
> +=09
> +	check_corba_ex,
> +	NULL,NULL,NULL
>  };
> =20
>  void initCORBA(void)
> @@ -399,10 +402,7 @@
> =20
>  	m =3D Py_InitModule("CORBA", CORBA_methods);
>  	ModuleDict =3D PyModule_GetDict(m);
> -=09
> -	PyDict_SetItemString(ModuleDict, "_ORBitPython_API", =20
> -						 PyCObject_FromVoidPtr(&functions, NULL));
> -=09
> +
> =20
>  	// Global hashes
>  	object_glue =3D g_hash_table_new(g_str_hash, g_str_equal);
> @@ -421,6 +421,13 @@
>  	ORBit_Python_init_consts();
>  	ORBit_Python_init_marshal();
>  	ORBit_Python_init_portable_server();
> +
> +	functions.OPExc=3DOPExc_Exception;
> +	functions.OPSysExt=3DOPExc_SystemException;
> +	functions.OPUsrExt=3DOPExc_UserException;
> +=09
> +	PyDict_SetItemString(ModuleDict, "_ORBitPython_API", =20
> +						 PyCObject_FromVoidPtr(&functions, NULL));
> =20
>  	global_client_module =3D Py_InitModule("_GlobalIDL", empty_methods);
>  	global_poa_module =3D Py_InitModule("_GlobalIDL__POA", empty_methods);
--=20
-------------------------------------------------
- Johan Dahlin              Address:            -
- zi...@as...        Nygatan 17, nb      -
- zil...@ho...          523 30 Ulricehamn   -
- PHONE: +46 (0)321-17559   SWEDEN              -
- IRC:   zilch @ irc.gnome.org                  -
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