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import math
import textwrap
import sys
import pytest
import threading
import traceback
import time
import random
import numpy as np
from numpy.testing import assert_, assert_equal, IS_PYPY
from . import util
class TestF77Callback(util.F2PyTest):
code = """
subroutine t(fun,a)
integer a
cf2py intent(out) a
external fun
call fun(a)
end
subroutine func(a)
cf2py intent(in,out) a
integer a
a = a + 11
end
subroutine func0(a)
cf2py intent(out) a
integer a
a = 11
end
subroutine t2(a)
cf2py intent(callback) fun
integer a
cf2py intent(out) a
external fun
call fun(a)
end
subroutine string_callback(callback, a)
external callback
double precision callback
double precision a
character*1 r
cf2py intent(out) a
r = 'r'
a = callback(r)
end
subroutine string_callback_array(callback, cu, lencu, a)
external callback
integer callback
integer lencu
character*8 cu(lencu)
integer a
cf2py intent(out) a
a = callback(cu, lencu)
end
subroutine hidden_callback(a, r)
external global_f
cf2py intent(callback, hide) global_f
integer a, r, global_f
cf2py intent(out) r
r = global_f(a)
end
subroutine hidden_callback2(a, r)
external global_f
integer a, r, global_f
cf2py intent(out) r
r = global_f(a)
end
"""
@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_equal(self.module.t.__doc__, expected)
def check_function(self, name):
t = getattr(self.module, name)
r = t(lambda: 4)
assert_(r == 4, repr(r))
r = t(lambda a: 5, fun_extra_args=(6,))
assert_(r == 5, repr(r))
r = t(lambda a: a, fun_extra_args=(6,))
assert_(r == 6, repr(r))
r = t(lambda a: 5 + a, fun_extra_args=(7,))
assert_(r == 12, repr(r))
r = t(lambda a: math.degrees(a), fun_extra_args=(math.pi,))
assert_(r == 180, repr(r))
r = t(math.degrees, fun_extra_args=(math.pi,))
assert_(r == 180, repr(r))
r = t(self.module.func, fun_extra_args=(6,))
assert_(r == 17, repr(r))
r = t(self.module.func0)
assert_(r == 11, repr(r))
r = t(self.module.func0._cpointer)
assert_(r == 11, repr(r))
class A:
def __call__(self):
return 7
def mth(self):
return 9
a = A()
r = t(a)
assert_(r == 7, repr(r))
r = t(a.mth)
assert_(r == 9, repr(r))
@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, repr(r))
@pytest.mark.skipif(sys.platform=='win32',
reason='Fails with MinGW64 Gfortran (Issue #9673)')
def test_string_callback_array(self):
# See gh-10027
cu = np.zeros((1, 8), 'S1')
def callback(cu, lencu):
if cu.shape != (lencu, 8):
return 1
if cu.dtype != 'S1':
return 2
if not np.all(cu == b''):
return 3
return 0
f = getattr(self.module, 'string_callback_array')
res = f(callback, cu, len(cu))
assert_(res == 0, repr(res))
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):
suffix = '.f90'
code = textwrap.dedent(
"""
function gh17797(f, y) result(r)
external f
integer(8) :: r, f
integer(8), dimension(:) :: y
r = f(0)
r = r + sum(y)
end function gh17797
""")
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!
"""
suffix = '.f90'
code = textwrap.dedent(
"""
! When gh18335_workaround is defined as an extension,
! the issue cannot be reproduced.
!subroutine gh18335_workaround(f, y)
! implicit none
! external f
! integer(kind=1) :: y(1)
! call f(y)
!end subroutine gh18335_workaround
function gh18335(f) result (r)
implicit none
external f
integer(kind=1) :: y(1), r
y(1) = 123
call f(y)
r = y(1)
end function gh18335
""")
def test_gh18335(self):
def foo(x):
x[0] += 1
y = np.array([1, 2, 3], dtype=np.int8)
r = self.module.gh18335(foo)
assert r == 123 + 1
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