Move native_enum_type_map into internals and remove cross_extension_shared_states feature.

CMakeLists.txt

@@ -147,10 +147,8 @@ endif()
 
 # NB: when adding a header don't forget to also add it to setup.py
 set(PYBIND11_HEADERS
-    include/pybind11/detail/abi_platform_id.h
     include/pybind11/detail/class.h
     include/pybind11/detail/common.h
-    include/pybind11/detail/cross_extension_shared_state.h
     include/pybind11/detail/descr.h
     include/pybind11/detail/dynamic_raw_ptr_cast_if_possible.h
     include/pybind11/detail/function_record_pyobject.h
@@ -162,7 +160,6 @@ set(PYBIND11_HEADERS
     include/pybind11/detail/smart_holder_type_casters.h
     include/pybind11/detail/type_caster_base.h
     include/pybind11/detail/type_caster_odr_guard.h
-    include/pybind11/detail/type_map.h
     include/pybind11/detail/typeid.h
     include/pybind11/detail/value_and_holder.h
     include/pybind11/attr.h

include/pybind11/cast.h

@@ -88,10 +88,10 @@ class type_caster_enum_type {
 
     template <typename SrcType>
     static handle cast(SrcType &&src, return_value_policy, handle parent) {
-        auto const &natives = cross_extension_shared_states::native_enum_type_map::get();
-        auto found = natives.find(std::type_index(typeid(EnumType)));
-        if (found != natives.end()) {
-            return handle(found->second)(static_cast<Underlying>(src)).release();
+        handle native_enum
+            = global_internals_native_enum_type_map_get_item(std::type_index(typeid(EnumType)));
+        if (native_enum) {
+            return native_enum(static_cast<Underlying>(src)).release();
         }
         return type_caster_for_class_<EnumType>::cast(
             std::forward<SrcType>(src),
@@ -101,10 +101,10 @@ class type_caster_enum_type {
     }
 
     bool load(handle src, bool convert) {
-        auto const &natives = cross_extension_shared_states::native_enum_type_map::get();
-        auto found = natives.find(std::type_index(typeid(EnumType)));
-        if (found != natives.end()) {
-            if (!isinstance(src, found->second)) {
+        handle native_enum
+            = global_internals_native_enum_type_map_get_item(std::type_index(typeid(EnumType)));
+        if (native_enum) {
+            if (!isinstance(src, native_enum)) {
                 return false;
             }
             type_caster<Underlying> underlying_caster;
@@ -180,12 +180,11 @@ struct type_caster_classh_enum_aware<
 
 template <typename T, detail::enable_if_t<std::is_enum<T>::value, int> = 0>
 bool isinstance_native_enum_impl(handle obj, const std::type_info &tp) {
-    auto const &natives = cross_extension_shared_states::native_enum_type_map::get();
-    auto found = natives.find(tp);
-    if (found == natives.end()) {
+    handle native_enum = global_internals_native_enum_type_map_get_item(tp);
+    if (!native_enum) {
         return false;
     }
-    return isinstance(obj, found->second);
+    return isinstance(obj, native_enum);
 }
 
 template <typename T, detail::enable_if_t<!std::is_enum<T>::value, int> = 0>
@@ -1351,9 +1350,8 @@ T cast(const handle &handle) {
                   "Unable to cast type to reference: value is local to type caster");
 #ifndef NDEBUG
     if (is_enum_cast && cast_is_temporary_value_reference<T>::value) {
-        if (cross_extension_shared_states::native_enum_type_map::get().count(
-                std::type_index(typeid(intrinsic_t<T>)))
-            != 0) {
+        if (detail::global_internals_native_enum_type_map_contains(
+                std::type_index(typeid(intrinsic_t<T>)))) {
             pybind11_fail("Unable to cast native enum type to reference");
         }
     }

include/pybind11/detail/function_record_pyobject.h

@@ -9,6 +9,7 @@
 #include "../attr.h"
 #include "../pytypes.h"
 #include "common.h"
+#include "internals.h"
 
 #include <cstring>
 
@@ -45,7 +46,7 @@ PYBIND11_WARNING_POP
 // Note that this name is versioned.
 constexpr char tp_name_impl[]
     = "pybind11_detail_function_record_" PYBIND11_DETAIL_FUNCTION_RECORD_ABI_ID
-      "_" PYBIND11_PLATFORM_ABI_ID_V4;
+        PYBIND11_INTERNALS_ID;
 
 PYBIND11_NAMESPACE_END(function_record_PyTypeObject_methods)