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import py, pytest
from pypy.module.cpyext.test.test_cpyext import AppTestCpythonExtensionBase
from pypy.module.cpyext.test.test_api import BaseApiTest
from rpython.rtyper.lltypesystem.lltype import nullptr
from pypy.module.cpyext.pystate import PyInterpreterState, PyThreadState
from pypy.module.cpyext.pyobject import from_ref
from rpython.rtyper.lltypesystem import lltype
from pypy.module.cpyext.test.test_cpyext import LeakCheckingTest, freeze_refcnts
from pypy.module.cpyext.pystate import PyThreadState_Get, PyInterpreterState_Head
from rpython.tool import leakfinder
class AppTestThreads(AppTestCpythonExtensionBase):
def test_allow_threads(self):
module = self.import_extension('foo', [
("test", "METH_NOARGS",
"""
Py_BEGIN_ALLOW_THREADS
{
Py_BLOCK_THREADS
Py_UNBLOCK_THREADS
}
Py_END_ALLOW_THREADS
Py_RETURN_NONE;
"""),
])
# Should compile at least
module.test()
def test_gilstate(self):
module = self.import_extension('foo', [
("double_ensure", "METH_O",
'''
PyGILState_STATE state0, state1;
int val = PyLong_AsLong(args);
PyEval_InitThreads();
state0 = PyGILState_Ensure(); /* hangs here */
if (val != 0)
{
state1 = PyGILState_Ensure();
PyGILState_Release(state1);
}
PyGILState_Release(state0);
Py_RETURN_NONE;
'''),
])
module.double_ensure(0)
module.double_ensure(1)
def test_thread_state_get(self):
module = self.import_extension('foo', [
("get", "METH_NOARGS",
"""
PyThreadState *tstate = PyThreadState_Get();
if (tstate == NULL) {
return PyLong_FromLong(0);
}
if (tstate->interp != PyInterpreterState_Head()) {
return PyLong_FromLong(1);
}
if (tstate->interp->next != NULL) {
return PyLong_FromLong(2);
}
return PyLong_FromLong(3);
"""),
])
assert module.get() == 3
@py.test.mark.xfail(run=False, reason='PyThreadState_Get() segfaults on py3k and CPython')
def test_basic_threadstate_dance(self):
module = self.import_extension('foo', [
("dance", "METH_NOARGS",
"""
PyThreadState *old_tstate, *new_tstate;
PyObject *d;
PyEval_InitThreads();
old_tstate = PyThreadState_Swap(NULL);
if (old_tstate == NULL) {
return PyLong_FromLong(0);
}
d = PyThreadState_GetDict(); /* fails on cpython */
if (d != NULL) {
return PyLong_FromLong(1);
}
new_tstate = PyThreadState_Swap(old_tstate);
if (new_tstate != NULL) {
return PyLong_FromLong(2);
}
new_tstate = PyThreadState_Get();
if (new_tstate != old_tstate) {
return PyLong_FromLong(3);
}
return PyLong_FromLong(4);
"""),
])
assert module.dance() == 4
def test_threadstate_dict(self):
module = self.import_extension('foo', [
("getdict", "METH_NOARGS",
"""
PyObject *dict = PyThreadState_GetDict();
Py_INCREF(dict);
return dict;
"""),
])
assert isinstance(module.getdict(), dict)
def test_savethread(self):
module = self.import_extension('foo', [
("bounce", "METH_NOARGS",
"""
PyThreadState * tstate;
if (PyEval_ThreadsInitialized() == 0)
{
PyEval_InitThreads();
}
PyGILState_Ensure();
tstate = PyEval_SaveThread();
if (tstate == NULL) {
return PyLong_FromLong(0);
}
PyEval_RestoreThread(tstate);
if (PyThreadState_Get() != tstate) {
return PyLong_FromLong(2);
}
return PyLong_FromLong(3);
"""),
])
res = module.bounce()
assert res == 3
def test_thread_and_gil(self):
module = self.import_extension('foo', [
("bounce", "METH_NOARGS",
"""
PyThreadState * tstate;
PyObject *dict;
PyGILState_STATE gilstate;
if (PyEval_ThreadsInitialized() == 0)
{
PyEval_InitThreads();
}
tstate = PyEval_SaveThread();
if (tstate == NULL) {
return PyLong_FromLong(0);
}
dict = PyThreadState_GetDict();
if (dict != NULL) {
return PyLong_FromLong(1);
}
gilstate = PyGILState_Ensure();
dict = PyThreadState_GetDict();
if (dict == NULL) {
return PyLong_FromLong(2);
}
PyGILState_Release(gilstate);
PyEval_RestoreThread(tstate);
if (PyThreadState_Get() != tstate) {
return PyLong_FromLong(3);
}
return PyLong_FromLong(4);
""")])
res = module.bounce()
assert res == 4
def test_nested_pygilstate_ensure(self):
module = self.import_extension('foo', [
("bounce", "METH_NOARGS",
"""
PyGILState_STATE gilstate;
PyObject *dict;
if (PyEval_ThreadsInitialized() == 0)
PyEval_InitThreads();
dict = PyThreadState_GetDict();
gilstate = PyGILState_Ensure();
PyGILState_Release(gilstate);
if (PyThreadState_GetDict() != dict)
return PyLong_FromLong(-2);
return PyLong_FromLong(4);
""")])
res = module.bounce()
assert res == 4
def test_threadsinitialized(self):
module = self.import_extension('foo', [
("test", "METH_NOARGS",
"""
return PyLong_FromLong(PyEval_ThreadsInitialized());
"""),
])
res = module.test()
assert res in (0, 1)
class AppTestState(AppTestCpythonExtensionBase):
@pytest.mark.xfail('not config.option.runappdirect', reason='segfaults', run=False)
def test_frame_tstate_tracing(self):
import sys, threading
module = self.import_extension('foo', [
("call_in_temporary_c_thread", "METH_O",
"""
PyObject *res = NULL;
test_c_thread_t test_c_thread;
long thread;
PyEval_InitThreads();
test_c_thread.start_event = PyThread_allocate_lock();
test_c_thread.exit_event = PyThread_allocate_lock();
test_c_thread.callback = NULL;
if (!test_c_thread.start_event || !test_c_thread.exit_event) {
PyErr_SetString(PyExc_RuntimeError, "could not allocate lock");
goto exit;
}
Py_INCREF(args);
test_c_thread.callback = args;
PyThread_acquire_lock(test_c_thread.start_event, 1);
PyThread_acquire_lock(test_c_thread.exit_event, 1);
thread = PyThread_start_new_thread(temporary_c_thread, &test_c_thread);
if (thread == -1) {
PyErr_SetString(PyExc_RuntimeError, "unable to start the thread");
PyThread_release_lock(test_c_thread.start_event);
PyThread_release_lock(test_c_thread.exit_event);
goto exit;
}
PyThread_acquire_lock(test_c_thread.start_event, 1);
PyThread_release_lock(test_c_thread.start_event);
Py_BEGIN_ALLOW_THREADS
PyThread_acquire_lock(test_c_thread.exit_event, 1);
PyThread_release_lock(test_c_thread.exit_event);
Py_END_ALLOW_THREADS
Py_INCREF(Py_None);
res = Py_None;
exit:
Py_CLEAR(test_c_thread.callback);
if (test_c_thread.start_event)
PyThread_free_lock(test_c_thread.start_event);
if (test_c_thread.exit_event)
PyThread_free_lock(test_c_thread.exit_event);
return res;
"""), ], prologue = """
#include "pythread.h"
typedef struct {
PyThread_type_lock start_event;
PyThread_type_lock exit_event;
PyObject *callback;
} test_c_thread_t;
static void
temporary_c_thread(void *data)
{
test_c_thread_t *test_c_thread = data;
PyGILState_STATE state;
PyObject *res;
PyThread_release_lock(test_c_thread->start_event);
/* Allocate a Python thread state for this thread */
state = PyGILState_Ensure();
res = PyObject_CallFunction(test_c_thread->callback, "", NULL);
Py_CLEAR(test_c_thread->callback);
if (res == NULL) {
PyErr_Print();
}
else {
Py_DECREF(res);
}
/* Destroy the Python thread state for this thread */
PyGILState_Release(state);
PyThread_release_lock(test_c_thread->exit_event);
/*PyThread_exit_thread(); NOP (on linux) and not implememnted */
};
""")
def noop_trace(frame, event, arg):
# no operation
return noop_trace
def generator():
while 1:
yield "genereator"
def callback():
if callback.gen is None:
callback.gen = generator()
return next(callback.gen)
callback.gen = None
old_trace = sys.gettrace()
sys.settrace(noop_trace)
try:
# Install a trace function
threading.settrace(noop_trace)
# Create a generator in a C thread which exits after the call
module.call_in_temporary_c_thread(callback)
# Call the generator in a different Python thread, check that the
# generator didn't keep a reference to the destroyed thread state
for test in range(3):
# The trace function is still called here
callback()
finally:
sys.settrace(old_trace)
class TestInterpreterState(BaseApiTest):
def test_interpreter_head(self, space, api):
state = api.PyInterpreterState_Head()
assert state != nullptr(PyInterpreterState.TO)
def test_interpreter_next(self, space, api):
state = api.PyInterpreterState_Head()
assert nullptr(PyInterpreterState.TO) == api.PyInterpreterState_Next(state)
|
