def _realize_c_struct_or_union(ffi, sindex):
s = ffi.ctxobj.ctx.c_struct_unions[sindex]
type_index = rffi.getintfield(s, 'c_type_index')
if ffi.cached_types[type_index] is not None:
return ffi.cached_types[type_index] #found already in the "primary" slot
space = ffi.space
w_ctype = None
c_flags = rffi.getintfield(s, 'c_flags')
c_first_field_index = rffi.getintfield(s, 'c_first_field_index')
if (c_flags & cffi_opcode.F_EXTERNAL) == 0:
if (c_flags & cffi_opcode.F_UNION) != 0:
name = _realize_name("union ", s.c_name)
x = ctypestruct.W_CTypeUnion(space, name)
else:
name = _realize_name("struct ", s.c_name)
x = ctypestruct.W_CTypeStruct(space, name)
if (c_flags & cffi_opcode.F_OPAQUE) == 0:
assert c_first_field_index >= 0
w_ctype = x
w_ctype.size = rffi.getintfield(s, 'c_size')
w_ctype.alignment = rffi.getintfield(s, 'c_alignment')
# w_ctype._field_list and other underscore fields are still
# None, making it a "lazy" (i.e. "non-forced") kind of struct
w_ctype._lazy_ffi = ffi
w_ctype._lazy_s = s
else:
assert c_first_field_index < 0
else:
assert c_first_field_index < 0
x = _fetch_external_struct_or_union(s, ffi.included_ffis_libs)
if x is None:
raise oefmt(ffi.w_FFIError,
"'%s %s' should come from ffi.include() but was not found",
"union" if c_flags & cffi_opcode.F_UNION else "struct",
rffi.charp2str(s.c_name))
assert isinstance(x, ctypestruct.W_CTypeStructOrUnion)
if (c_flags & cffi_opcode.F_OPAQUE) == 0 and x.size < 0:
prefix = "union" if c_flags & cffi_opcode.F_UNION else "struct"
name = rffi.charp2str(s.c_name)
raise oefmt(space.w_NotImplementedError,
"'%s %s' is opaque in the ffi.include(), but no "
"longer in the ffi doing the include (workaround: don't "
"use ffi.include() but duplicate the declarations of "
"everything using %s %s)",
prefix, name, prefix, name)
# Update the "primary" OP_STRUCT_UNION slot
ffi.cached_types[type_index] = x
if w_ctype is not None and rffi.getintfield(s, 'c_size') == -2:
# oops, this struct is unnamed and we couldn't generate
# a C expression to get its size. We have to rely on
# complete_struct_or_union() to compute it now.
try:
do_realize_lazy_struct(w_ctype)
except:
ffi.cached_types[type_index] = None
raise
return x
def get_file_struct(self):
if self.file_struct is None:
self.file_struct = ctypestruct.W_CTypeStruct(self.space, "FILE")
return self.file_struct
def new_struct_type(space, name):
return ctypestruct.W_CTypeStruct(space, name)
