The code below, very much work in progress, just trying things, is C++.
Sorry about the formatting, I had to reformat manually for this posting:
<code>
class Module
{
private:
Ptr p_;
public:
Module( PyModuleDef const& def )
: p_( ::PyModule_Create( const_cast< PyModuleDef* >( &def ) ) )
{
(p_.get() != 0) || cppx::throwX( "Module::<init>: failed" );
}
PyObject* rawPtr() const { return p_.get(); }
PyObject* release() { return p_.release(); }
void setDocString( wchar_t const s[] )
{
Ptr const v = ::PyUnicode_FromWideChar( s, -1 );
(v.get() != 0)
|| cppx::throwX( "PyUnicode_FromWideChar failed" );
int const _ = ::PyObject_SetAttrString(
p_.get(), "__doc__", v.get()
);
(_ != -1 )
|| cppx::throwX( "PyObject_SetAttrString failed" );
}
void setRoutine(
char const name[], PyCFunction f, char const doc[] = ""
)
{
PyMethodDef def = { name, f, METH_VARARGS, doc };
Ptr const pyName = ::PyUnicode_FromString( name );
Ptr r = ::PyCFunction_NewEx(
&def, p_.get(), pyName.get()
);
int const _ = ::PyModule_AddObject( p_.get(), name, r.release() );
(_ != -1 )
|| cppx::throwX( "PyModule_AddObject failed" );
}
};
</code>
Problem: when a routine installed by 'setRoutine' above is called from Python,
then it fails with e.g. "SystemError: Bad call flags in PyCFunction_Call.
METH_OLDARGS is no longer supported!"
And since things work for a single method when I declare 'def' as 'static', I
suspect that means that the function object created by PyCFunction_NewEx holds
on to a pointer to the PyMethodDef structure?
I'm unable to find documentation of PyCFunction_NewEx, and more criticially, I'm
unable to find any documented way to turn a C or C++ function into a Python
function object?
Cheers,
- Alf
--
blog at <url: http://alfps.wordpress.com>
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