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Merge branch 'pybind:master' into master

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Steve R. Sun 2022-12-02 09:58:37 +08:00 committed by GitHub
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4
.github/workflows/pip.yml vendored
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@ -98,13 +98,13 @@ jobs:
- uses: actions/download-artifact@v3
- name: Publish standard package
uses: pypa/gh-action-pypi-publish@v1.5.1
uses: pypa/gh-action-pypi-publish@v1.5.2
with:
password: ${{ secrets.pypi_password }}
packages_dir: standard/
- name: Publish global package
uses: pypa/gh-action-pypi-publish@v1.5.1
uses: pypa/gh-action-pypi-publish@v1.5.2
with:
password: ${{ secrets.pypi_password_global }}
packages_dir: global/

119
include/pybind11/embed.h
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@ -86,37 +86,22 @@ inline wchar_t *widen_chars(const char *safe_arg) {
return widened_arg;
}
PYBIND11_NAMESPACE_END(detail)
/** \rst
Initialize the Python interpreter. No other pybind11 or CPython API functions can be
called before this is done; with the exception of `PYBIND11_EMBEDDED_MODULE`. The
optional `init_signal_handlers` parameter can be used to skip the registration of
signal handlers (see the `Python documentation`_ for details). Calling this function
again after the interpreter has already been initialized is a fatal error.
If initializing the Python interpreter fails, then the program is terminated. (This
is controlled by the CPython runtime and is an exception to pybind11's normal behavior
of throwing exceptions on errors.)
The remaining optional parameters, `argc`, `argv`, and `add_program_dir_to_path` are
used to populate ``sys.argv`` and ``sys.path``.
See the |PySys_SetArgvEx documentation|_ for details.
.. _Python documentation: https://docs.python.org/3/c-api/init.html#c.Py_InitializeEx
.. |PySys_SetArgvEx documentation| replace:: ``PySys_SetArgvEx`` documentation
.. _PySys_SetArgvEx documentation: https://docs.python.org/3/c-api/init.html#c.PySys_SetArgvEx
\endrst */
inline void initialize_interpreter(bool init_signal_handlers = true,
int argc = 0,
const char *const *argv = nullptr,
bool add_program_dir_to_path = true) {
inline void precheck_interpreter() {
if (Py_IsInitialized() != 0) {
pybind11_fail("The interpreter is already running");
}
}
#if PY_VERSION_HEX < 0x030B0000
#if !defined(PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX)
# define PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX (0x03080000)
#endif
#if PY_VERSION_HEX < PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
inline void initialize_interpreter_pre_pyconfig(bool init_signal_handlers,
int argc,
const char *const *argv,
bool add_program_dir_to_path) {
detail::precheck_interpreter();
Py_InitializeEx(init_signal_handlers ? 1 : 0);
# if defined(WITH_THREAD) && PY_VERSION_HEX < 0x03070000
PyEval_InitThreads();
@ -150,26 +135,30 @@ inline void initialize_interpreter(bool init_signal_handlers = true,
auto *pysys_argv = widened_argv.get();
PySys_SetArgvEx(argc, pysys_argv, static_cast<int>(add_program_dir_to_path));
#else
PyConfig config;
PyConfig_InitIsolatedConfig(&config);
config.isolated = 0;
config.use_environment = 1;
config.install_signal_handlers = init_signal_handlers ? 1 : 0;
}
#endif
PyStatus status = PyConfig_SetBytesArgv(&config, argc, const_cast<char *const *>(argv));
if (PyStatus_Exception(status)) {
PYBIND11_NAMESPACE_END(detail)
#if PY_VERSION_HEX >= PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
inline void initialize_interpreter(PyConfig *config,
int argc = 0,
const char *const *argv = nullptr,
bool add_program_dir_to_path = true) {
detail::precheck_interpreter();
PyStatus status = PyConfig_SetBytesArgv(config, argc, const_cast<char *const *>(argv));
if (PyStatus_Exception(status) != 0) {
// A failure here indicates a character-encoding failure or the python
// interpreter out of memory. Give up.
PyConfig_Clear(&config);
throw std::runtime_error(PyStatus_IsError(status) ? status.err_msg
: "Failed to prepare CPython");
PyConfig_Clear(config);
throw std::runtime_error(PyStatus_IsError(status) != 0 ? status.err_msg
: "Failed to prepare CPython");
}
status = Py_InitializeFromConfig(&config);
PyConfig_Clear(&config);
if (PyStatus_Exception(status)) {
throw std::runtime_error(PyStatus_IsError(status) ? status.err_msg
: "Failed to init CPython");
status = Py_InitializeFromConfig(config);
if (PyStatus_Exception(status) != 0) {
PyConfig_Clear(config);
throw std::runtime_error(PyStatus_IsError(status) != 0 ? status.err_msg
: "Failed to init CPython");
}
if (add_program_dir_to_path) {
PyRun_SimpleString("import sys, os.path; "
@ -177,6 +166,43 @@ inline void initialize_interpreter(bool init_signal_handlers = true,
"os.path.abspath(os.path.dirname(sys.argv[0])) "
"if sys.argv and os.path.exists(sys.argv[0]) else '')");
}
PyConfig_Clear(config);
}
#endif
/** \rst
Initialize the Python interpreter. No other pybind11 or CPython API functions can be
called before this is done; with the exception of `PYBIND11_EMBEDDED_MODULE`. The
optional `init_signal_handlers` parameter can be used to skip the registration of
signal handlers (see the `Python documentation`_ for details). Calling this function
again after the interpreter has already been initialized is a fatal error.
If initializing the Python interpreter fails, then the program is terminated. (This
is controlled by the CPython runtime and is an exception to pybind11's normal behavior
of throwing exceptions on errors.)
The remaining optional parameters, `argc`, `argv`, and `add_program_dir_to_path` are
used to populate ``sys.argv`` and ``sys.path``.
See the |PySys_SetArgvEx documentation|_ for details.
.. _Python documentation: https://docs.python.org/3/c-api/init.html#c.Py_InitializeEx
.. |PySys_SetArgvEx documentation| replace:: ``PySys_SetArgvEx`` documentation
.. _PySys_SetArgvEx documentation: https://docs.python.org/3/c-api/init.html#c.PySys_SetArgvEx
\endrst */
inline void initialize_interpreter(bool init_signal_handlers = true,
int argc = 0,
const char *const *argv = nullptr,
bool add_program_dir_to_path = true) {
#if PY_VERSION_HEX < PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
detail::initialize_interpreter_pre_pyconfig(
init_signal_handlers, argc, argv, add_program_dir_to_path);
#else
PyConfig config;
PyConfig_InitIsolatedConfig(&config);
config.isolated = 0;
config.use_environment = 1;
config.install_signal_handlers = init_signal_handlers ? 1 : 0;
initialize_interpreter(&config, argc, argv, add_program_dir_to_path);
#endif
}
@ -264,6 +290,15 @@ public:
initialize_interpreter(init_signal_handlers, argc, argv, add_program_dir_to_path);
}
#if PY_VERSION_HEX >= PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
explicit scoped_interpreter(PyConfig *config,
int argc = 0,
const char *const *argv = nullptr,
bool add_program_dir_to_path = true) {
initialize_interpreter(config, argc, argv, add_program_dir_to_path);
}
#endif
scoped_interpreter(const scoped_interpreter &) = delete;
scoped_interpreter(scoped_interpreter &&other) noexcept { other.is_valid = false; }
scoped_interpreter &operator=(const scoped_interpreter &) = delete;

8
tests/conftest.py
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@ -17,7 +17,12 @@ import pytest
# Early diagnostic for failed imports
import pybind11_tests
if os.name != "nt":
@pytest.fixture(scope="session", autouse=True)
def always_forkserver_on_unix():
if os.name == "nt":
return
# Full background: https://github.com/pybind/pybind11/issues/4105#issuecomment-1301004592
# In a nutshell: fork() after starting threads == flakiness in the form of deadlocks.
# It is actually a well-known pitfall, unfortunately without guard rails.
@ -27,6 +32,7 @@ if os.name != "nt":
# running with defaults.
multiprocessing.set_start_method("forkserver")
_long_marker = re.compile(r"([0-9])L")
_hexadecimal = re.compile(r"0x[0-9a-fA-F]+")

69
tests/test_embed/test_interpreter.cpp
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@ -14,6 +14,11 @@ PYBIND11_WARNING_DISABLE_MSVC(4996)
namespace py = pybind11;
using namespace py::literals;
size_t get_sys_path_size() {
auto sys_path = py::module::import("sys").attr("path");
return py::len(sys_path);
}
class Widget {
public:
explicit Widget(std::string message) : message(std::move(message)) {}
@ -166,6 +171,70 @@ TEST_CASE("There can be only one interpreter") {
py::initialize_interpreter();
}
#if PY_VERSION_HEX >= PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
TEST_CASE("Custom PyConfig") {
py::finalize_interpreter();
PyConfig config;
PyConfig_InitPythonConfig(&config);
REQUIRE_NOTHROW(py::scoped_interpreter{&config});
{
py::scoped_interpreter p{&config};
REQUIRE(py::module_::import("widget_module").attr("add")(1, 41).cast<int>() == 42);
}
py::initialize_interpreter();
}
TEST_CASE("Custom PyConfig with argv") {
py::finalize_interpreter();
{
PyConfig config;
PyConfig_InitIsolatedConfig(&config);
char *argv[] = {strdup("a.out")};
py::scoped_interpreter argv_scope{&config, 1, argv};
std::free(argv[0]);
auto module = py::module::import("test_interpreter");
auto py_widget = module.attr("DerivedWidget")("The question");
const auto &cpp_widget = py_widget.cast<const Widget &>();
REQUIRE(cpp_widget.argv0() == "a.out");
}
py::initialize_interpreter();
}
#endif
TEST_CASE("Add program dir to path pre-PyConfig") {
py::finalize_interpreter();
size_t path_size_add_program_dir_to_path_false = 0;
{
py::scoped_interpreter scoped_interp{true, 0, nullptr, false};
path_size_add_program_dir_to_path_false = get_sys_path_size();
}
{
py::scoped_interpreter scoped_interp{};
REQUIRE(get_sys_path_size() == path_size_add_program_dir_to_path_false + 1);
}
py::initialize_interpreter();
}
#if PY_VERSION_HEX >= PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
TEST_CASE("Add program dir to path using PyConfig") {
py::finalize_interpreter();
size_t path_size_add_program_dir_to_path_false = 0;
{
PyConfig config;
PyConfig_InitPythonConfig(&config);
py::scoped_interpreter scoped_interp{&config, 0, nullptr, false};
path_size_add_program_dir_to_path_false = get_sys_path_size();
}
{
PyConfig config;
PyConfig_InitPythonConfig(&config);
py::scoped_interpreter scoped_interp{&config};
REQUIRE(get_sys_path_size() == path_size_add_program_dir_to_path_false + 1);
}
py::initialize_interpreter();
}
#endif
bool has_pybind11_internals_builtin() {
auto builtins = py::handle(PyEval_GetBuiltins());
return builtins.contains(PYBIND11_INTERNALS_ID);