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stash pybind11 data structures in interpreter state dictionary

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This commit is contained in:
Wenzel Jakob 2022-10-28 11:46:52 +02:00
parent fcb5554d9f
commit 3b1472174e
1 changed files with 26 additions and 9 deletions
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35
include/pybind11/detail/internals.h
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@ -277,6 +277,12 @@ struct type_info {
# endif
#endif
#if PY_VERSION_HEX < 0x03090000
# define PYBIND11_INTERPRETER_STATE_GET _PyInterpreterState_Get
#else
# define PYBIND11_INTERPRETER_STATE_GET PyInterpreterState_Get
#endif
#define PYBIND11_INTERNALS_ID \
"__pybind11_internals_v" PYBIND11_TOSTRING(PYBIND11_INTERNALS_VERSION) \
PYBIND11_INTERNALS_KIND PYBIND11_COMPILER_TYPE PYBIND11_STDLIB PYBIND11_BUILD_ABI \
@ -403,7 +409,7 @@ inline void translate_local_exception(std::exception_ptr p) {
/// Return a reference to the current `internals` data
PYBIND11_NOINLINE internals &get_internals() {
auto **&internals_pp = get_internals_pp();
internals **&internals_pp = get_internals_pp();
if (internals_pp && *internals_pp) {
return **internals_pp;
}
@ -419,11 +425,24 @@ PYBIND11_NOINLINE internals &get_internals() {
} gil;
error_scope err_scope;
PYBIND11_STR_TYPE id(PYBIND11_INTERNALS_ID);
auto builtins = handle(PyEval_GetBuiltins());
if (builtins.contains(id) && isinstance<capsule>(builtins[id])) {
internals_pp = static_cast<internals **>(capsule(builtins[id]));
const char *id_cstr = PYBIND11_INTERNALS_ID;
PYBIND11_STR_TYPE id(id_cstr);
dict state_dict
= reinterpret_borrow<dict>(PyInterpreterState_GetDict(PYBIND11_INTERPRETER_STATE_GET()));
if (!state_dict)
pybind11_fail("get_internals(): PyInterpreterState_GetDict() failed!");
if (state_dict.contains(id_cstr)) {
object o = state_dict[id];
// May fail if 'capsule_obj' is not a capsule, or if it has a different
// name. We clear the error status below in that case
internals_pp = static_cast<internals **>(PyCapsule_GetPointer(o.ptr(), id_cstr));
if (!internals_pp)
PyErr_Clear();
}
if (internals_pp) {
// We loaded builtins through python's builtins, which means that our `error_already_set`
// and `builtin_exception` may be different local classes than the ones set up in the
// initial exception translator, below, so add another for our local exception classes.
@ -435,9 +454,7 @@ PYBIND11_NOINLINE internals &get_internals() {
(*internals_pp)->registered_exception_translators.push_front(&translate_local_exception);
#endif
} else {
if (!internals_pp) {
internals_pp = new internals *();
}
internals_pp = new internals *();
auto *&internals_ptr = *internals_pp;
internals_ptr = new internals();
#if defined(WITH_THREAD)
@ -459,7 +476,7 @@ PYBIND11_NOINLINE internals &get_internals() {
# endif
internals_ptr->istate = tstate->interp;
#endif
builtins[id] = capsule(internals_pp);
state_dict[id] = capsule(internals_pp, id_cstr);
internals_ptr->registered_exception_translators.push_front(&translate_exception);
internals_ptr->static_property_type = make_static_property_type();
internals_ptr->default_metaclass = make_default_metaclass();