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from rpython.translator.c.test.test_genc import compile
import pypy.module.cpyext.api
from pypy.module.cpyext.api import slot_function
from rpython.rtyper.annlowlevel import llhelper
from rpython.rtyper.lltypesystem import lltype
from rpython.rlib.objectmodel import specialize
from rpython.rlib.nonconst import NonConstant
def test_llhelper(monkeypatch):
"""Show how to get function pointers used in type slots"""
FT = lltype.FuncType([], lltype.Signed)
FTPTR = lltype.Ptr(FT)
def make_wrapper(self, space):
def wrapper():
return self.callable(space)
return wrapper
monkeypatch.setattr(pypy.module.cpyext.api.ApiFunction, '_make_wrapper', make_wrapper)
@specialize.memo()
def get_tp_function(space, typedef):
@slot_function([], lltype.Signed, error=-1)
def slot_tp_function(space):
return typedef.value
api_func = slot_tp_function.api_func
return lambda: llhelper(api_func.functype, api_func.get_wrapper(space))
class Space:
_cache = {}
@specialize.memo()
def fromcache(self, key):
try:
return self._cache[key]
except KeyError:
result = self._cache[key] = self.build(key)
return result
def _freeze_(self):
return True
class TypeDef:
def __init__(self, value):
self.value = value
def _freeze_(self):
return True
class W_Type:
def __init__(self, typedef):
self.instancetypedef = typedef
def _freeze(self):
try:
del self.funcptr
except AttributeError:
pass
return False
w_type1 = W_Type(TypeDef(123))
w_type2 = W_Type(TypeDef(456))
space = Space()
def run(x):
if x:
w_type = w_type1
else:
w_type = w_type2
typedef = w_type.instancetypedef
w_type.funcptr = get_tp_function(space, typedef)()
return w_type.funcptr()
fn = compile(run, [bool])
assert fn(True) == 123
assert fn(False) == 456
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