name : test_callback.py import math import textwrap import sys import pytest import threading import traceback import time import numpy as np from numpy.testing import IS_PYPY from . import util class TestF77Callback(util.F2PyTest): sources = [util.getpath("tests", "src", "callback", "foo.f")] @pytest.mark.parametrize("name", "t,t2".split(",")) def test_all(self, name): self.check_function(name) @pytest.mark.xfail(IS_PYPY, reason="PyPy cannot modify tp_doc after PyType_Ready") def test_docstring(self): expected = textwrap.dedent("""\ a = t(fun,[fun_extra_args]) Wrapper for ``t``. Parameters ---------- fun : call-back function Other Parameters ---------------- fun_extra_args : input tuple, optional Default: () Returns ------- a : int Notes ----- Call-back functions:: def fun(): return a Return objects: a : int """) assert self.module.t.__doc__ == expected def check_function(self, name): t = getattr(self.module, name) r = t(lambda: 4) assert r == 4 r = t(lambda a: 5, fun_extra_args=(6, )) assert r == 5 r = t(lambda a: a, fun_extra_args=(6, )) assert r == 6 r = t(lambda a: 5 + a, fun_extra_args=(7, )) assert r == 12 r = t(lambda a: math.degrees(a), fun_extra_args=(math.pi, )) assert r == 180 r = t(math.degrees, fun_extra_args=(math.pi, )) assert r == 180 r = t(self.module.func, fun_extra_args=(6, )) assert r == 17 r = t(self.module.func0) assert r == 11 r = t(self.module.func0._cpointer) assert r == 11 class A: def __call__(self): return 7 def mth(self): return 9 a = A() r = t(a) assert r == 7 r = t(a.mth) assert r == 9 @pytest.mark.skipif(sys.platform == 'win32', reason='Fails with MinGW64 Gfortran (Issue #9673)') def test_string_callback(self): def callback(code): if code == "r": return 0 else: return 1 f = getattr(self.module, "string_callback") r = f(callback) assert r == 0 @pytest.mark.skipif(sys.platform == 'win32', reason='Fails with MinGW64 Gfortran (Issue #9673)') def test_string_callback_array(self): # See gh-10027 cu1 = np.zeros((1, ), "S8") cu2 = np.zeros((1, 8), "c") cu3 = np.array([""], "S8") def callback(cu, lencu): if cu.shape != (lencu,): return 1 if cu.dtype != "S8": return 2 if not np.all(cu == b""): return 3 return 0 f = getattr(self.module, "string_callback_array") for cu in [cu1, cu2, cu3]: res = f(callback, cu, cu.size) assert res == 0 def test_threadsafety(self): # Segfaults if the callback handling is not threadsafe errors = [] def cb(): # Sleep here to make it more likely for another thread # to call their callback at the same time. time.sleep(1e-3) # Check reentrancy r = self.module.t(lambda: 123) assert r == 123 return 42 def runner(name): try: for j in range(50): r = self.module.t(cb) assert r == 42 self.check_function(name) except Exception: errors.append(traceback.format_exc()) threads = [ threading.Thread(target=runner, args=(arg, )) for arg in ("t", "t2") for n in range(20) ] for t in threads: t.start() for t in threads: t.join() errors = "\n\n".join(errors) if errors: raise AssertionError(errors) def test_hidden_callback(self): try: self.module.hidden_callback(2) except Exception as msg: assert str(msg).startswith("Callback global_f not defined") try: self.module.hidden_callback2(2) except Exception as msg: assert str(msg).startswith("cb: Callback global_f not defined") self.module.global_f = lambda x: x + 1 r = self.module.hidden_callback(2) assert r == 3 self.module.global_f = lambda x: x + 2 r = self.module.hidden_callback(2) assert r == 4 del self.module.global_f try: self.module.hidden_callback(2) except Exception as msg: assert str(msg).startswith("Callback global_f not defined") self.module.global_f = lambda x=0: x + 3 r = self.module.hidden_callback(2) assert r == 5 # reproducer of gh18341 r = self.module.hidden_callback2(2) assert r == 3 class TestF77CallbackPythonTLS(TestF77Callback): """ Callback tests using Python thread-local storage instead of compiler-provided """ options = ["-DF2PY_USE_PYTHON_TLS"] class TestF90Callback(util.F2PyTest): sources = [util.getpath("tests", "src", "callback", "gh17797.f90")] def test_gh17797(self): def incr(x): return x + 123 y = np.array([1, 2, 3], dtype=np.int64) r = self.module.gh17797(incr, y) assert r == 123 + 1 + 2 + 3 class TestGH18335(util.F2PyTest): """The reproduction of the reported issue requires specific input that extensions may break the issue conditions, so the reproducer is implemented as a separate test class. Do not extend this test with other tests! """ sources = [util.getpath("tests", "src", "callback", "gh18335.f90")] def test_gh18335(self): def foo(x): x[0] += 1 r = self.module.gh18335(foo) assert r == 123 + 1