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"""
NOTE: these tests are also meant to be run as PyPy "applevel" tests.
This means that global imports will NOT be visible inside the test
functions. In particular, you have to "import pytest" inside the test in order
to be able to use e.g. pytest.raises (which on PyPy will be implemented by a
"fake pytest module")
"""
import pytest
from .support import HPyTest, DefaultExtensionTemplate
class PairTemplate(DefaultExtensionTemplate):
def DEFINE_PairObject(self):
return """
typedef struct {
HPyField a;
HPyField b;
} PairObject;
HPyType_HELPERS(PairObject);
"""
def DEFINE_Pair_new(self):
return """
HPyDef_SLOT(Pair_new, Pair_new_impl, HPy_tp_new)
static HPy Pair_new_impl(HPyContext *ctx, HPy cls, HPy *args,
HPy_ssize_t nargs, HPy kw)
{
HPy a;
HPy b;
if (!HPyArg_Parse(ctx, NULL, args, nargs, "OO", &a, &b))
return HPy_NULL;
PairObject *pair;
HPy h_obj = HPy_New(ctx, cls, &pair);
HPyField_Store(ctx, h_obj, &pair->a, a);
HPyField_Store(ctx, h_obj, &pair->b, b);
return h_obj;
}
"""
def DEFINE_Pair_traverse(self):
return """
HPyDef_SLOT(Pair_traverse, Pair_traverse_impl, HPy_tp_traverse)
static int Pair_traverse_impl(void *self, HPyFunc_visitproc visit, void *arg)
{
PairObject *p = (PairObject *)self;
HPy_VISIT(&p->a);
HPy_VISIT(&p->b);
return 0;
}
"""
def DEFINE_Pair_get_ab(self):
return """
HPyDef_METH(Pair_get_a, "get_a", Pair_get_a_impl, HPyFunc_NOARGS)
static HPy Pair_get_a_impl(HPyContext *ctx, HPy self)
{
PairObject *pair = PairObject_AsStruct(ctx, self);
if (HPy_IsNull(pair->a))
return HPyUnicode_FromString(ctx, "<NULL>");
return HPyField_Load(ctx, self, pair->a);
}
HPyDef_METH(Pair_get_b, "get_b", Pair_get_b_impl, HPyFunc_NOARGS)
static HPy Pair_get_b_impl(HPyContext *ctx, HPy self)
{
PairObject *pair = PairObject_AsStruct(ctx, self);
if (HPy_IsNull(pair->b))
return HPyUnicode_FromString(ctx, "<NULL>");
return HPyField_Load(ctx, self, pair->b);
}
"""
pair_type_flags = 'HPy_TPFLAGS_DEFAULT | HPy_TPFLAGS_HAVE_GC'
def PAIR_TYPE_FLAGS(self, flags):
self.pair_type_flags = flags
def EXPORT_PAIR_TYPE(self, *defines):
defines += ('NULL',)
defines = ', '.join(defines)
self.EXPORT_TYPE('"Pair"', "Pair_spec")
return """
static HPyDef *Pair_defines[] = { %s };
static HPyType_Spec Pair_spec = {
.name = "mytest.Pair",
.basicsize = sizeof(PairObject),
.flags = %s,
.defines = Pair_defines
};
""" % (defines, self.pair_type_flags)
class TestHPyField(HPyTest):
ExtensionTemplate = PairTemplate
def test_gc_track(self):
if not self.supports_refcounts():
import pytest
pytest.skip("CPython only")
import sys
# Test that we correctly call PyObject_GC_Track on CPython. The
# easiest way is to check whether the object is in
# gc.get_objects().
import gc
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_traverse
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse)
@INIT
""")
p = mod.Pair("hello", "world")
assert gc.is_tracked(p)
def test_gc_track_no_gc_flag(self):
if not self.supports_refcounts():
import pytest
pytest.skip("CPython only")
# Same code as test_gc_track, but without HPy_TPFLAGS_HAVE_GC. On
# CPython, the object is NOT tracked.
import gc
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_traverse
@PAIR_TYPE_FLAGS(HPy_TPFLAGS_DEFAULT)
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse)
@INIT
""")
p = mod.Pair("hello", "world")
assert not gc.is_tracked(p)
def test_tp_traverse(self):
import sys
import gc
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_traverse
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse)
@INIT
""")
p = mod.Pair("hello", "world")
referents = gc.get_referents(p)
# pypy reports p.__class__ as referents, filter it out
referents = [obj for obj in referents if obj is not mod.Pair]
referents.sort()
assert referents == ['hello', 'world']
def test_tp_traverse_sanity_check(self):
import pytest
with pytest.raises(ValueError):
self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
// here we are defining a type with HPy_TPFLAGS_HAVE_GC but
// without providing a tp_traverse
@EXPORT_PAIR_TYPE(&Pair_new)
@INIT
""")
def test_store_load(self):
import sys
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_get_ab
@DEFINE_Pair_traverse
@PAIR_TYPE_FLAGS(HPy_TPFLAGS_DEFAULT)
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse, &Pair_get_a, &Pair_get_b)
@INIT
""")
p = mod.Pair("hello", "world")
assert p.get_a() == 'hello'
assert p.get_b() == 'world'
#
# check the refcnt
if self.supports_refcounts():
a = object()
a_refcnt = sys.getrefcount(a)
p2 = mod.Pair(a, None)
assert sys.getrefcount(a) == a_refcnt + 1
assert p2.get_a() is a
assert sys.getrefcount(a) == a_refcnt + 1
def test_store_overwrite(self):
import sys
mod = self.make_module("""
#include <assert.h>
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_get_ab
@DEFINE_Pair_traverse
HPyDef_METH(Pair_set_a, "set_a", Pair_set_a_impl, HPyFunc_O)
static HPy Pair_set_a_impl(HPyContext *ctx, HPy self, HPy arg)
{
PairObject *pair = PairObject_AsStruct(ctx, self);
HPyField_Store(ctx, self, &pair->a, arg);
return HPy_Dup(ctx, ctx->h_None);
}
HPyDef_METH(Pair_clear_a, "clear_a", Pair_clear_a_impl, HPyFunc_NOARGS)
static HPy Pair_clear_a_impl(HPyContext *ctx, HPy self)
{
PairObject *pair = PairObject_AsStruct(ctx, self);
HPyField_Store(ctx, self, &pair->a, HPy_NULL);
return HPy_Dup(ctx, ctx->h_None);
}
@PAIR_TYPE_FLAGS(HPy_TPFLAGS_DEFAULT)
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse, &Pair_get_a, &Pair_get_b, &Pair_set_a, &Pair_clear_a)
@INIT
""")
p = mod.Pair("hello", "world")
assert p.get_a() == 'hello'
assert p.get_b() == 'world'
p.set_a('foo')
assert p.get_a() == 'foo'
p.clear_a()
assert p.get_a() == '<NULL>'
p.set_a('bar')
assert p.get_a() == 'bar'
#
# check the refcnt
if self.supports_refcounts():
a = object()
a_refcnt = sys.getrefcount(a)
p2 = mod.Pair(a, None)
assert sys.getrefcount(a) == a_refcnt + 1
assert p2.get_a() is a
p2.set_a('foo')
assert sys.getrefcount(a) == a_refcnt
p2.set_a(a)
assert sys.getrefcount(a) == a_refcnt + 1
p2.clear_a()
assert sys.getrefcount(a) == a_refcnt
p2.clear_a()
assert sys.getrefcount(a) == a_refcnt
def test_automatic_tp_dealloc(self):
import sys
if not self.supports_refcounts():
import pytest
pytest.skip("CPython only")
import sys
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_traverse
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse)
@INIT
""")
a = object()
b = object()
p = mod.Pair(a, b)
a_cnt = sys.getrefcount(a)
b_cnt = sys.getrefcount(b)
del p
assert sys.getrefcount(a) == a_cnt - 1
assert sys.getrefcount(b) == b_cnt - 1
@pytest.mark.syncgc
def test_automatic_tp_clear(self):
if not self.supports_refcounts():
import pytest
pytest.skip("CPython only")
import sys
import gc
mod = self.make_module("""
@DEFINE_PairObject
@DEFINE_Pair_new
@DEFINE_Pair_traverse
HPyDef_METH(Pair_set_a, "set_a", Pair_set_a_impl, HPyFunc_O)
static HPy Pair_set_a_impl(HPyContext *ctx, HPy self, HPy arg)
{
PairObject *pair = PairObject_AsStruct(ctx, self);
HPyField_Store(ctx, self, &pair->a, arg);
return HPy_Dup(ctx, ctx->h_None);
}
@EXPORT_PAIR_TYPE(&Pair_new, &Pair_traverse, &Pair_set_a)
@INIT
""")
def count_pairs():
return len([obj for obj in gc.get_objects() if type(obj) is mod.Pair])
assert count_pairs() == 0
p1 = mod.Pair(None, 'hello')
p2 = mod.Pair(None, 'world')
p1.set_a(p2)
p2.set_a(p1)
assert count_pairs() == 2
#
try:
gc.disable()
del p1
del p2
assert count_pairs() == 2
finally:
gc.enable()
#
gc.collect()
assert count_pairs() == 0
|
