def __init__(self, cfunc, callback):
self.cfunc = cfunc
self.callback = callback
pointer = rffi.cast(rffi.VOIDP, clibffi.closureHeap.alloc())
if cfunc.notready:
cfunc.prepare_cif()
cfunc.notready = False
Mem.__init__(self, cfunc, pointer)
closure_ptr = rffi.cast(clibffi.FFI_CLOSUREP, self.pointer)
# hide the object
gcref = rgc.cast_instance_to_gcref(self)
raw = rgc.hide_nonmovable_gcref(gcref)
unique_id = rffi.cast(rffi.VOIDP, raw)
res = clibffi.c_ffi_prep_closure(closure_ptr, cfunc.cif.cif,
invoke_callback, unique_id)
if rffi.cast(lltype.Signed, res) != clibffi.FFI_OK:
raise unwind(LError(u"libffi failed to build this callback"))
if closure_ptr.c_user_data != unique_id:
raise unwind(LError(u"ffi_prep_closure(): bad user_data"))
# The function might be called in separate thread,
# so allocate GIL here, just in case.
rgil.allocate()
def _newp_handle(space, w_ctype, w_x):
# Allocate a handle as a nonmovable W_CDataHandle instance, which
# we can cast to a plain CCHARP. As long as the object is not freed,
# we can cast the CCHARP back to a W_CDataHandle with reveal_gcref().
new_cdataobj = objectmodel.instantiate(cdataobj.W_CDataHandle,
nonmovable=True)
gcref = rgc.cast_instance_to_gcref(new_cdataobj)
_cdata = rgc.hide_nonmovable_gcref(gcref)
_cdata = rffi.cast(rffi.CCHARP, _cdata)
cdataobj.W_CDataHandle.__init__(new_cdataobj, space, _cdata, w_ctype, w_x)
return new_cdataobj
def _newp_handle(space, w_ctype, w_x):
# Allocate a handle as a nonmovable W_CDataHandle instance, which
# we can cast to a plain CCHARP. As long as the object is not freed,
# we can cast the CCHARP back to a W_CDataHandle with reveal_gcref().
new_cdataobj = objectmodel.instantiate(cdataobj.W_CDataHandle,
nonmovable=True)
gcref = rgc.cast_instance_to_gcref(new_cdataobj)
_cdata = rgc.hide_nonmovable_gcref(gcref)
_cdata = rffi.cast(rffi.CCHARP, _cdata)
cdataobj.W_CDataHandle.__init__(new_cdataobj, space, _cdata, w_ctype, w_x)
return new_cdataobj
def hide_object(self):
gcref = rgc.cast_instance_to_gcref(self)
raw = rgc.hide_nonmovable_gcref(gcref)
return rffi.cast(rffi.VOIDP, raw)
def hide_object(self):
gcref = rgc.cast_instance_to_gcref(self)
raw = rgc.hide_nonmovable_gcref(gcref)
return rffi.cast(rffi.VOIDP, raw)
def hide_object(PTR, obj):
gcref = rgc.cast_instance_to_gcref(obj)
raw = rgc.hide_nonmovable_gcref(gcref)
return rffi.cast(PTR, raw)