def memo(funcdesc, arglist_s):
from pypy.annotation.model import SomePBC, SomeImpossibleValue, SomeBool
from pypy.annotation.model import unionof
# call the function now, and collect possible results
argvalues = []
for s in arglist_s:
if s.is_constant():
values = [s.const]
elif isinstance(s, SomePBC):
values = []
assert not s.can_be_None, "memo call: cannot mix None and PBCs"
for desc in s.descriptions:
if desc.pyobj is None:
raise Exception(
"memo call with a class or PBC that has no "
"corresponding Python object (%r)" % (desc, ))
values.append(desc.pyobj)
elif isinstance(s, SomeImpossibleValue):
return s # we will probably get more possible args later
elif isinstance(s, SomeBool):
values = [False, True]
else:
raise Exception("memo call: argument must be a class or a frozen "
"PBC, got %r" % (s, ))
argvalues.append(values)
# the list of all possible tuples of arguments to give to the memo function
possiblevalues = cartesian_product(argvalues)
# a MemoTable factory -- one MemoTable per family of arguments that can
# be called together, merged via a UnionFind.
bookkeeper = funcdesc.bookkeeper
try:
memotables = bookkeeper.all_specializations[funcdesc]
except KeyError:
func = funcdesc.pyobj
if func is None:
raise Exception("memo call: no Python function object to call "
"(%r)" % (funcdesc, ))
def compute_one_result(args):
value = func(*args)
memotable = MemoTable(funcdesc, args, value)
memotable.register_finish()
return memotable
memotables = UnionFind(compute_one_result)
bookkeeper.all_specializations[funcdesc] = memotables
# merge the MemoTables for the individual argument combinations
firstvalues = possiblevalues.next()
_, _, memotable = memotables.find(firstvalues)
for values in possiblevalues:
_, _, memotable = memotables.union(firstvalues, values)
if memotable.graph is not None:
return memotable.graph # if already computed
else:
# otherwise, for now, return the union of each possible result
return unionof(
*[bookkeeper.immutablevalue(v) for v in memotable.table.values()])
def memo(funcdesc, arglist_s):
from pypy.annotation.model import SomePBC, SomeImpossibleValue, SomeBool
from pypy.annotation.model import unionof
# call the function now, and collect possible results
argvalues = []
for s in arglist_s:
if s.is_constant():
values = [s.const]
elif isinstance(s, SomePBC):
values = []
assert not s.can_be_None, "memo call: cannot mix None and PBCs"
for desc in s.descriptions:
if desc.pyobj is None:
raise Exception("memo call with a class or PBC that has no "
"corresponding Python object (%r)" % (desc,))
values.append(desc.pyobj)
elif isinstance(s, SomeImpossibleValue):
return s # we will probably get more possible args later
elif isinstance(s, SomeBool):
values = [False, True]
else:
raise Exception("memo call: argument must be a class or a frozen "
"PBC, got %r" % (s,))
argvalues.append(values)
# the list of all possible tuples of arguments to give to the memo function
possiblevalues = cartesian_product(argvalues)
# a MemoTable factory -- one MemoTable per family of arguments that can
# be called together, merged via a UnionFind.
bookkeeper = funcdesc.bookkeeper
try:
memotables = bookkeeper.all_specializations[funcdesc]
except KeyError:
func = funcdesc.pyobj
if func is None:
raise Exception("memo call: no Python function object to call "
"(%r)" % (funcdesc,))
def compute_one_result(args):
value = func(*args)
memotable = MemoTable(funcdesc, args, value)
memotable.register_finish()
return memotable
memotables = UnionFind(compute_one_result)
bookkeeper.all_specializations[funcdesc] = memotables
# merge the MemoTables for the individual argument combinations
firstvalues = possiblevalues.next()
_, _, memotable = memotables.find(firstvalues)
for values in possiblevalues:
_, _, memotable = memotables.union(firstvalues, values)
if memotable.graph is not None:
return memotable.graph # if already computed
else:
# otherwise, for now, return the union of each possible result
return unionof(*[bookkeeper.immutablevalue(v)
for v in memotable.table.values()])
def test_cleanup():
state = []
class ReferencedByExternalState(object):
def __init__(self, obj):
state.append(self)
self.obj = obj
def absorb(self, other):
state.remove(other)
uf = UnionFind(ReferencedByExternalState)
uf.find(1)
for i in xrange(1, 10, 2):
uf.union(i, 1)
uf.find(2)
for i in xrange(2, 20, 2):
uf.union(i, 2)
assert len(state) == 2 # we have exactly 2 partitions
def test_cleanup():
state = []
class ReferencedByExternalState(object):
def __init__(self, obj):
state.append(self)
self.obj = obj
def absorb(self, other):
state.remove(other)
uf = UnionFind(ReferencedByExternalState)
uf.find(1)
for i in xrange(1, 10, 2):
uf.union(i, 1)
uf.find(2)
for i in xrange(2, 20, 2):
uf.union(i, 2)
assert len(state) == 2 # we have exactly 2 partitions
