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Merge branch 'master' into sh_merge_master

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Ralf W. Grosse-Kunstleve 2024-11-05 10:20:12 -08:00
commit 3b35ce475f
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12 changed files with 434 additions and 10 deletions
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15
include/pybind11/cast.h
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@ -1847,15 +1847,24 @@ struct function_call {
handle init_self;
};
// See PR #5396 for the discussion that led to this
template <typename Base, typename Derived, typename = void>
struct is_same_or_base_of : std::is_same<Base, Derived> {};
// Only evaluate is_base_of if Derived is complete.
// is_base_of raises a compiler error if Derived is incomplete.
template <typename Base, typename Derived>
struct is_same_or_base_of<Base, Derived, decltype(void(sizeof(Derived)))>
: any_of<std::is_same<Base, Derived>, std::is_base_of<Base, Derived>> {};
/// Helper class which loads arguments for C++ functions called from Python
template <typename... Args>
class argument_loader {
using indices = make_index_sequence<sizeof...(Args)>;
template <typename Arg>
using argument_is_args = std::is_base_of<args, intrinsic_t<Arg>>;
using argument_is_args = is_same_or_base_of<args, intrinsic_t<Arg>>;
template <typename Arg>
using argument_is_kwargs = std::is_base_of<kwargs, intrinsic_t<Arg>>;
using argument_is_kwargs = is_same_or_base_of<kwargs, intrinsic_t<Arg>>;
// Get kwargs argument position, or -1 if not present:
static constexpr auto kwargs_pos = constexpr_last<argument_is_kwargs, Args...>();

56
include/pybind11/detail/class.h
View File

@ -603,8 +603,10 @@ extern "C" inline int pybind11_getbuffer(PyObject *obj, Py_buffer *view, int fla
set_error(PyExc_BufferError, "Writable buffer requested for readonly storage");
return -1;
}
// Fill in all the information, and then downgrade as requested by the caller, or raise an
// error if that's not possible.
view->obj = obj;
view->ndim = 1;
view->internal = info;
view->buf = info->ptr;
view->itemsize = info->itemsize;
@ -612,15 +614,59 @@ extern "C" inline int pybind11_getbuffer(PyObject *obj, Py_buffer *view, int fla
for (auto s : info->shape) {
view->len *= s;
}
view->ndim = static_cast<int>(info->ndim);
view->shape = info->shape.data();
view->strides = info->strides.data();
view->readonly = static_cast<int>(info->readonly);
if ((flags & PyBUF_FORMAT) == PyBUF_FORMAT) {
view->format = const_cast<char *>(info->format.c_str());
}
if ((flags & PyBUF_STRIDES) == PyBUF_STRIDES) {
view->ndim = (int) info->ndim;
view->strides = info->strides.data();
view->shape = info->shape.data();
// Note, all contiguity flags imply PyBUF_STRIDES and lower.
if ((flags & PyBUF_C_CONTIGUOUS) == PyBUF_C_CONTIGUOUS) {
if (PyBuffer_IsContiguous(view, 'C') == 0) {
std::memset(view, 0, sizeof(Py_buffer));
delete info;
set_error(PyExc_BufferError,
"C-contiguous buffer requested for discontiguous storage");
return -1;
}
} else if ((flags & PyBUF_F_CONTIGUOUS) == PyBUF_F_CONTIGUOUS) {
if (PyBuffer_IsContiguous(view, 'F') == 0) {
std::memset(view, 0, sizeof(Py_buffer));
delete info;
set_error(PyExc_BufferError,
"Fortran-contiguous buffer requested for discontiguous storage");
return -1;
}
} else if ((flags & PyBUF_ANY_CONTIGUOUS) == PyBUF_ANY_CONTIGUOUS) {
if (PyBuffer_IsContiguous(view, 'A') == 0) {
std::memset(view, 0, sizeof(Py_buffer));
delete info;
set_error(PyExc_BufferError, "Contiguous buffer requested for discontiguous storage");
return -1;
}
} else if ((flags & PyBUF_STRIDES) != PyBUF_STRIDES) {
// If no strides are requested, the buffer must be C-contiguous.
// https://docs.python.org/3/c-api/buffer.html#contiguity-requests
if (PyBuffer_IsContiguous(view, 'C') == 0) {
std::memset(view, 0, sizeof(Py_buffer));
delete info;
set_error(PyExc_BufferError,
"C-contiguous buffer requested for discontiguous storage");
return -1;
}
view->strides = nullptr;
// Since this is a contiguous buffer, it can also pretend to be 1D.
if ((flags & PyBUF_ND) != PyBUF_ND) {
view->shape = nullptr;
view->ndim = 0;
}
}
Py_INCREF(view->obj);
return 0;
}

171
tests/test_buffers.cpp
View File

@ -167,6 +167,125 @@ TEST_SUBMODULE(buffers, m) {
sizeof(float)});
});
// A matrix that uses Fortran storage order.
class FortranMatrix : public Matrix {
public:
FortranMatrix(py::ssize_t rows, py::ssize_t cols) : Matrix(cols, rows) {
print_created(this,
std::to_string(rows) + "x" + std::to_string(cols) + " Fortran matrix");
}
float operator()(py::ssize_t i, py::ssize_t j) const { return Matrix::operator()(j, i); }
float &operator()(py::ssize_t i, py::ssize_t j) { return Matrix::operator()(j, i); }
using Matrix::data;
py::ssize_t rows() const { return Matrix::cols(); }
py::ssize_t cols() const { return Matrix::rows(); }
};
py::class_<FortranMatrix, Matrix>(m, "FortranMatrix", py::buffer_protocol())
.def(py::init<py::ssize_t, py::ssize_t>())
.def("rows", &FortranMatrix::rows)
.def("cols", &FortranMatrix::cols)
/// Bare bones interface
.def("__getitem__",
[](const FortranMatrix &m, std::pair<py::ssize_t, py::ssize_t> i) {
if (i.first >= m.rows() || i.second >= m.cols()) {
throw py::index_error();
}
return m(i.first, i.second);
})
.def("__setitem__",
[](FortranMatrix &m, std::pair<py::ssize_t, py::ssize_t> i, float v) {
if (i.first >= m.rows() || i.second >= m.cols()) {
throw py::index_error();
}
m(i.first, i.second) = v;
})
/// Provide buffer access
.def_buffer([](FortranMatrix &m) -> py::buffer_info {
return py::buffer_info(m.data(), /* Pointer to buffer */
{m.rows(), m.cols()}, /* Buffer dimensions */
/* Strides (in bytes) for each index */
{sizeof(float), sizeof(float) * size_t(m.rows())});
});
// A matrix that uses a discontiguous underlying memory block.
class DiscontiguousMatrix : public Matrix {
public:
DiscontiguousMatrix(py::ssize_t rows,
py::ssize_t cols,
py::ssize_t row_factor,
py::ssize_t col_factor)
: Matrix(rows * row_factor, cols * col_factor), m_row_factor(row_factor),
m_col_factor(col_factor) {
print_created(this,
std::to_string(rows) + "(*" + std::to_string(row_factor) + ")x"
+ std::to_string(cols) + "(*" + std::to_string(col_factor)
+ ") matrix");
}
~DiscontiguousMatrix() {
print_destroyed(this,
std::to_string(rows() / m_row_factor) + "(*"
+ std::to_string(m_row_factor) + ")x"
+ std::to_string(cols() / m_col_factor) + "(*"
+ std::to_string(m_col_factor) + ") matrix");
}
float operator()(py::ssize_t i, py::ssize_t j) const {
return Matrix::operator()(i * m_row_factor, j * m_col_factor);
}
float &operator()(py::ssize_t i, py::ssize_t j) {
return Matrix::operator()(i * m_row_factor, j * m_col_factor);
}
using Matrix::data;
py::ssize_t rows() const { return Matrix::rows() / m_row_factor; }
py::ssize_t cols() const { return Matrix::cols() / m_col_factor; }
py::ssize_t row_factor() const { return m_row_factor; }
py::ssize_t col_factor() const { return m_col_factor; }
private:
py::ssize_t m_row_factor;
py::ssize_t m_col_factor;
};
py::class_<DiscontiguousMatrix, Matrix>(m, "DiscontiguousMatrix", py::buffer_protocol())
.def(py::init<py::ssize_t, py::ssize_t, py::ssize_t, py::ssize_t>())
.def("rows", &DiscontiguousMatrix::rows)
.def("cols", &DiscontiguousMatrix::cols)
/// Bare bones interface
.def("__getitem__",
[](const DiscontiguousMatrix &m, std::pair<py::ssize_t, py::ssize_t> i) {
if (i.first >= m.rows() || i.second >= m.cols()) {
throw py::index_error();
}
return m(i.first, i.second);
})
.def("__setitem__",
[](DiscontiguousMatrix &m, std::pair<py::ssize_t, py::ssize_t> i, float v) {
if (i.first >= m.rows() || i.second >= m.cols()) {
throw py::index_error();
}
m(i.first, i.second) = v;
})
/// Provide buffer access
.def_buffer([](DiscontiguousMatrix &m) -> py::buffer_info {
return py::buffer_info(m.data(), /* Pointer to buffer */
{m.rows(), m.cols()}, /* Buffer dimensions */
/* Strides (in bytes) for each index */
{size_t(m.col_factor()) * sizeof(float) * size_t(m.cols())
* size_t(m.row_factor()),
size_t(m.col_factor()) * sizeof(float)});
});
class BrokenMatrix : public Matrix {
public:
BrokenMatrix(py::ssize_t rows, py::ssize_t cols) : Matrix(rows, cols) {}
@ -268,4 +387,56 @@ TEST_SUBMODULE(buffers, m) {
});
m.def("get_buffer_info", [](const py::buffer &buffer) { return buffer.request(); });
// Expose Py_buffer for testing.
m.attr("PyBUF_FORMAT") = PyBUF_FORMAT;
m.attr("PyBUF_SIMPLE") = PyBUF_SIMPLE;
m.attr("PyBUF_ND") = PyBUF_ND;
m.attr("PyBUF_STRIDES") = PyBUF_STRIDES;
m.attr("PyBUF_INDIRECT") = PyBUF_INDIRECT;
m.attr("PyBUF_C_CONTIGUOUS") = PyBUF_C_CONTIGUOUS;
m.attr("PyBUF_F_CONTIGUOUS") = PyBUF_F_CONTIGUOUS;
m.attr("PyBUF_ANY_CONTIGUOUS") = PyBUF_ANY_CONTIGUOUS;
m.def("get_py_buffer", [](const py::object &object, int flags) {
Py_buffer buffer;
memset(&buffer, 0, sizeof(Py_buffer));
if (PyObject_GetBuffer(object.ptr(), &buffer, flags) == -1) {
throw py::error_already_set();
}
auto SimpleNamespace = py::module_::import("types").attr("SimpleNamespace");
py::object result = SimpleNamespace("len"_a = buffer.len,
"readonly"_a = buffer.readonly,
"itemsize"_a = buffer.itemsize,
"format"_a = buffer.format,
"ndim"_a = buffer.ndim,
"shape"_a = py::none(),
"strides"_a = py::none(),
"suboffsets"_a = py::none());
if (buffer.shape != nullptr) {
py::list l;
for (auto i = 0; i < buffer.ndim; i++) {
l.append(buffer.shape[i]);
}
py::setattr(result, "shape", l);
}
if (buffer.strides != nullptr) {
py::list l;
for (auto i = 0; i < buffer.ndim; i++) {
l.append(buffer.strides[i]);
}
py::setattr(result, "strides", l);
}
if (buffer.suboffsets != nullptr) {
py::list l;
for (auto i = 0; i < buffer.ndim; i++) {
l.append(buffer.suboffsets[i]);
}
py::setattr(result, "suboffsets", l);
}
PyBuffer_Release(&buffer);
return result;
});
}

160
tests/test_buffers.py
View File

@ -239,3 +239,163 @@ def test_buffer_exception():
memoryview(m.BrokenMatrix(1, 1))
assert isinstance(excinfo.value.__cause__, RuntimeError)
assert "for context" in str(excinfo.value.__cause__)
@pytest.mark.parametrize("type", ["pybind11", "numpy"])
def test_c_contiguous_to_pybuffer(type):
if type == "pybind11":
mat = m.Matrix(5, 4)
elif type == "numpy":
mat = np.empty((5, 4), dtype=np.float32)
else:
raise ValueError(f"Unknown parametrization {type}")
info = m.get_py_buffer(mat, m.PyBUF_SIMPLE)
assert info.format is None
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 0 # See discussion on PR #5407.
assert info.shape is None
assert info.strides is None
assert info.suboffsets is None
assert not info.readonly
info = m.get_py_buffer(mat, m.PyBUF_SIMPLE | m.PyBUF_FORMAT)
assert info.format == "f"
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 0 # See discussion on PR #5407.
assert info.shape is None
assert info.strides is None
assert info.suboffsets is None
assert not info.readonly
info = m.get_py_buffer(mat, m.PyBUF_ND)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides is None
assert info.suboffsets is None
assert not info.readonly
info = m.get_py_buffer(mat, m.PyBUF_STRIDES)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides == [4 * info.itemsize, info.itemsize]
assert info.suboffsets is None
assert not info.readonly
info = m.get_py_buffer(mat, m.PyBUF_INDIRECT)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides == [4 * info.itemsize, info.itemsize]
assert info.suboffsets is None # Should be filled in here, but we don't use it.
assert not info.readonly
@pytest.mark.parametrize("type", ["pybind11", "numpy"])
def test_fortran_contiguous_to_pybuffer(type):
if type == "pybind11":
mat = m.FortranMatrix(5, 4)
elif type == "numpy":
mat = np.empty((5, 4), dtype=np.float32, order="F")
else:
raise ValueError(f"Unknown parametrization {type}")
# A Fortran-shaped buffer can only be accessed at PyBUF_STRIDES level or higher.
info = m.get_py_buffer(mat, m.PyBUF_STRIDES)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides == [info.itemsize, 5 * info.itemsize]
assert info.suboffsets is None
assert not info.readonly
info = m.get_py_buffer(mat, m.PyBUF_INDIRECT)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides == [info.itemsize, 5 * info.itemsize]
assert info.suboffsets is None # Should be filled in here, but we don't use it.
assert not info.readonly
@pytest.mark.parametrize("type", ["pybind11", "numpy"])
def test_discontiguous_to_pybuffer(type):
if type == "pybind11":
mat = m.DiscontiguousMatrix(5, 4, 2, 3)
elif type == "numpy":
mat = np.empty((5 * 2, 4 * 3), dtype=np.float32)[::2, ::3]
else:
raise ValueError(f"Unknown parametrization {type}")
info = m.get_py_buffer(mat, m.PyBUF_STRIDES)
assert info.itemsize == ctypes.sizeof(ctypes.c_float)
assert info.len == 5 * 4 * info.itemsize
assert info.ndim == 2
assert info.shape == [5, 4]
assert info.strides == [2 * 4 * 3 * info.itemsize, 3 * info.itemsize]
assert info.suboffsets is None
assert not info.readonly
@pytest.mark.parametrize("type", ["pybind11", "numpy"])
def test_to_pybuffer_contiguity(type):
def check_strides(mat):
# The full block is memset to 0, so fill it with non-zero in real spots.
expected = np.arange(1, 5 * 4 + 1).reshape((5, 4))
for i in range(5):
for j in range(4):
mat[i, j] = expected[i, j]
# If all strides are correct, the exposed buffer should match the input.
np.testing.assert_array_equal(np.array(mat), expected)
if type == "pybind11":
cmat = m.Matrix(5, 4) # C contiguous.
fmat = m.FortranMatrix(5, 4) # Fortran contiguous.
dmat = m.DiscontiguousMatrix(5, 4, 2, 3) # Not contiguous.
expected_exception = BufferError
elif type == "numpy":
cmat = np.empty((5, 4), dtype=np.float32) # C contiguous.
fmat = np.empty((5, 4), dtype=np.float32, order="F") # Fortran contiguous.
dmat = np.empty((5 * 2, 4 * 3), dtype=np.float32)[::2, ::3] # Not contiguous.
# NumPy incorrectly raises ValueError; when the minimum NumPy requirement is
# above the version that fixes https://github.com/numpy/numpy/issues/3634 then
# BufferError can be used everywhere.
expected_exception = (BufferError, ValueError)
else:
raise ValueError(f"Unknown parametrization {type}")
check_strides(cmat)
# Should work in C-contiguous mode, but not Fortran order.
m.get_py_buffer(cmat, m.PyBUF_C_CONTIGUOUS)
m.get_py_buffer(cmat, m.PyBUF_ANY_CONTIGUOUS)
with pytest.raises(expected_exception):
m.get_py_buffer(cmat, m.PyBUF_F_CONTIGUOUS)
check_strides(fmat)
# These flags imply C-contiguity, so won't work.
with pytest.raises(expected_exception):
m.get_py_buffer(fmat, m.PyBUF_SIMPLE)
with pytest.raises(expected_exception):
m.get_py_buffer(fmat, m.PyBUF_ND)
# Should work in Fortran-contiguous mode, but not C order.
with pytest.raises(expected_exception):
m.get_py_buffer(fmat, m.PyBUF_C_CONTIGUOUS)
m.get_py_buffer(fmat, m.PyBUF_ANY_CONTIGUOUS)
m.get_py_buffer(fmat, m.PyBUF_F_CONTIGUOUS)
check_strides(dmat)
# Should never work.
with pytest.raises(expected_exception):
m.get_py_buffer(dmat, m.PyBUF_SIMPLE)
with pytest.raises(expected_exception):
m.get_py_buffer(dmat, m.PyBUF_ND)
with pytest.raises(expected_exception):
m.get_py_buffer(dmat, m.PyBUF_C_CONTIGUOUS)
with pytest.raises(expected_exception):
m.get_py_buffer(dmat, m.PyBUF_ANY_CONTIGUOUS)
with pytest.raises(expected_exception):
m.get_py_buffer(dmat, m.PyBUF_F_CONTIGUOUS)

2
tests/test_call_policies.py
View File

@ -190,6 +190,7 @@ def test_alive_gc_multi_derived(capture):
)
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_return_none(capture):
n_inst = ConstructorStats.detail_reg_inst()
with capture:
@ -217,6 +218,7 @@ def test_return_none(capture):
assert capture == "Releasing parent."
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_keep_alive_constructor(capture):
n_inst = ConstructorStats.detail_reg_inst()

16
tests/test_class.cpp
View File

@ -52,8 +52,24 @@ void bind_empty0(py::module_ &m) {
}
} // namespace pr4220_tripped_over_this
namespace pr5396_forward_declared_class {
class ForwardClass;
class Args : public py::args {};
} // namespace pr5396_forward_declared_class
} // namespace test_class
static_assert(py::detail::is_same_or_base_of<py::args, py::args>::value, "");
static_assert(
py::detail::is_same_or_base_of<py::args,
test_class::pr5396_forward_declared_class::Args>::value,
"");
static_assert(!py::detail::is_same_or_base_of<
py::args,
test_class::pr5396_forward_declared_class::ForwardClass>::value,
"");
TEST_SUBMODULE(class_, m) {
m.def("obj_class_name", [](py::handle obj) { return py::detail::obj_class_name(obj.ptr()); });

7
tests/test_class.py
View File

@ -27,6 +27,9 @@ def test_instance(msg):
instance = m.NoConstructor.new_instance()
if env.GRAALPY:
pytest.skip("ConstructorStats is incompatible with GraalPy.")
cstats = ConstructorStats.get(m.NoConstructor)
assert cstats.alive() == 1
del instance
@ -35,6 +38,10 @@ def test_instance(msg):
def test_instance_new():
instance = m.NoConstructorNew() # .__new__(m.NoConstructor.__class__)
if env.GRAALPY:
pytest.skip("ConstructorStats is incompatible with GraalPy.")
cstats = ConstructorStats.get(m.NoConstructorNew)
assert cstats.alive() == 1
del instance

4
tests/test_copy_move.py
View File

@ -2,6 +2,7 @@ from __future__ import annotations
import pytest
import env # noqa: F401
from pybind11_tests import copy_move_policies as m
@ -17,6 +18,7 @@ def test_lacking_move_ctor():
assert "is neither movable nor copyable!" in str(excinfo.value)
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_move_and_copy_casts():
"""Cast some values in C++ via custom type casters and count the number of moves/copies."""
@ -44,6 +46,7 @@ def test_move_and_copy_casts():
assert c_m.alive() + c_mc.alive() + c_c.alive() == 0
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_move_and_copy_loads():
"""Call some functions that load arguments via custom type casters and count the number of
moves/copies."""
@ -77,6 +80,7 @@ def test_move_and_copy_loads():
@pytest.mark.skipif(not m.has_optional, reason="no <optional>")
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_move_and_copy_load_optional():
"""Tests move/copy loads of std::optional arguments"""

2
tests/test_custom_type_casters.py
View File

@ -2,6 +2,7 @@ from __future__ import annotations
import pytest
import env # noqa: F401
from pybind11_tests import custom_type_casters as m
@ -94,6 +95,7 @@ def test_noconvert_args(msg):
)
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def test_custom_caster_destruction():
"""Tests that returning a pointer to a type that gets converted with a custom type caster gets
destroyed when the function has py::return_value_policy::take_ownership policy applied.

1
tests/test_eigen_matrix.py
View File

@ -395,6 +395,7 @@ def test_eigen_return_references():
np.testing.assert_array_equal(a_copy5, c5want)
@pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
def assert_keeps_alive(cl, method, *args):
cstats = ConstructorStats.get(cl)
start_with = cstats.alive()

5
tests/test_opaque_types.py
View File

@ -2,6 +2,7 @@ from __future__ import annotations
import pytest
import env
from pybind11_tests import ConstructorStats, UserType
from pybind11_tests import opaque_types as m
@ -30,7 +31,9 @@ def test_pointers(msg):
living_before = ConstructorStats.get(UserType).alive()
assert m.get_void_ptr_value(m.return_void_ptr()) == 0x1234
assert m.get_void_ptr_value(UserType()) # Should also work for other C++ types
assert ConstructorStats.get(UserType).alive() == living_before
if not env.GRAALPY:
assert ConstructorStats.get(UserType).alive() == living_before
with pytest.raises(TypeError) as excinfo:
m.get_void_ptr_value([1, 2, 3]) # This should not work

5
tests/test_operator_overloading.py
View File

@ -2,7 +2,7 @@ from __future__ import annotations
import pytest
import env # noqa: F401
import env
from pybind11_tests import ConstructorStats
from pybind11_tests import operators as m
@ -51,6 +51,9 @@ def test_operator_overloading():
v2 /= v1
assert str(v2) == "[2.000000, 8.000000]"
if env.GRAALPY:
pytest.skip("ConstructorStats is incompatible with GraalPy.")
cstats = ConstructorStats.get(m.Vector2)
assert cstats.alive() == 3
del v1