Author: Antonio Cuni <[email protected]>
Branch: ffistruct
Changeset: r47132:bbd9a00c7369
Date: 2011-09-07 09:46 +0200
http://bitbucket.org/pypy/pypy/changeset/bbd9a00c7369/
Log: bah, forgot to add this file in the previous checkin
diff --git a/pypy/module/_ffi/interp_struct.py
b/pypy/module/_ffi/interp_struct.py
new file mode 100644
--- /dev/null
+++ b/pypy/module/_ffi/interp_struct.py
@@ -0,0 +1,66 @@
+from pypy.rpython.lltypesystem import lltype
+from pypy.rlib import clibffi
+from pypy.interpreter.baseobjspace import Wrappable
+from pypy.interpreter.typedef import TypeDef, interp_attrproperty
+from pypy.interpreter.gateway import interp2app, unwrap_spec
+from pypy.objspace.std.typetype import type_typedef
+from pypy.module._ffi.interp_ffitype import W_FFIType
+
+class W_Field(Wrappable):
+
+ def __init__(self, name, w_ffitype):
+ self.name = name
+ self.w_ffitype = w_ffitype
+ self.offset = -1
+
+ @staticmethod
+ @unwrap_spec(name=str)
+ def descr_new(space, w_type, name, w_ffitype):
+ w_ffitype = space.interp_w(W_FFIType, w_ffitype)
+ return W_Field(name, w_ffitype)
+
+W_Field.typedef = TypeDef(
+ 'Field',
+ __new__ = interp2app(W_Field.descr_new),
+ name = interp_attrproperty('name', W_Field),
+ ffitype = interp_attrproperty('w_ffitype', W_Field),
+ offset = interp_attrproperty('offset', W_Field),
+ )
+
+
+#
==============================================================================
+
+
+class W__StructDescr(Wrappable):
+
+ def __init__(self, name, ffistruct):
+ self.ffistruct = ffistruct
+ self.ffitype = W_FFIType('struct %s' % name, ffistruct.ffistruct,
'fixme')
+
+ @staticmethod
+ @unwrap_spec(name=str)
+ def descr_new(space, w_type, name, w_fields):
+ size = 0
+ alignment = 0 # XXX
+ fields_w = space.fixedview(w_fields)
+ field_types = []
+ for w_field in fields_w:
+ w_field = space.interp_w(W_Field, w_field)
+ w_field.offset = size # XXX: alignment!
+ size += w_field.w_ffitype.sizeof()
+ field_types.append(w_field.w_ffitype.ffitype)
+ #
+ ffistruct = clibffi.make_struct_ffitype_e(size, alignment, field_types)
+ return W__StructDescr(name, ffistruct)
+
+ def __del__(self):
+ if self.ffistruct:
+ lltype.free(self.ffistruct, flavor='raw')
+
+
+W__StructDescr.typedef = TypeDef(
+ '_StructDescr',
+ __new__ = interp2app(W__StructDescr.descr_new),
+ ffitype = interp_attrproperty('ffitype', W__StructDescr),
+ )
+
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