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 cast(obj, ctype):
ctype = to_type(ctype)
if isinstance(obj, Handle):
return Handle(obj.library, obj.name, obj.pointer, ctype)
if isinstance(obj, Mem):
return Mem(ctype, obj.pointer)
if isinstance(obj, Uint8Data):
return Mem(ctype, rffi.cast(rffi.VOIDP, obj.uint8data))
if isinstance(obj, Integer) and isinstance(ctype, Pointer):
return Mem(ctype, rffi.cast(rffi.VOIDP, obj.value))
raise unwind(LTypeError(u"Can cast memory locations only"))
def malloc(argv):
ctype = argument(argv, 0, Type)
if len(argv) >= 2:
n = argument(argv, 1, Integer).value
size = simple.sizeof_a(ctype, n)
else:
n = 1
size = simple.sizeof(ctype)
pointer = lltype.malloc(rffi.VOIDP.TO, size, flavor='raw')
return Mem(systemv.Pointer(ctype), pointer, n)
def malloc(ctype, count, clear):
ctype = to_type(ctype)
if count:
n = count.value
size = simple.sizeof_a(ctype, n)
else:
n = 1
size = simple.sizeof(ctype)
pointer = lltype.malloc(rffi.VOIDP.TO, size, flavor='raw')
if is_true(clear):
rffi.c_memset(pointer, 0, size)
return Mem(systemv.Pointer(ctype), pointer, n)
def __init__(self, library, name, pointer, ctype):
Mem.__init__(self, ctype, pointer)
self.library = library
self.name = name
def cast(obj, ctype):
if isinstance(obj, Handle):
return Handle(obj.library, obj.name, obj.pointer, ctype)
if isinstance(obj, Mem):
return Mem(ctype, obj.pointer)
raise Error(u"Can cast memory locations only")