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87be8d9522
This is effectively two changes. The first (the bulk of the change) is where we add _Py_AddToGlobalDict() (and _PyRuntime.cached_objects.main_tstate, etc.). The second (much smaller) change is where we update PyUnicode_InternInPlace() to use _Py_AddToGlobalDict() instead of calling PyDict_SetDefault() directly. Basically, _Py_AddToGlobalDict() is a wrapper around PyDict_SetDefault() that should be used whenever we need to add a value to a runtime-global dict object (in the few cases where we are leaving the container global rather than moving it to PyInterpreterState, e.g. the interned strings dict). _Py_AddToGlobalDict() does all the necessary work to make sure the target global dict is shared safely between isolated interpreters. This is especially important as we move the obmalloc state to each interpreter (gh-101660), as well as, potentially, the GIL (PEP 684). https://github.com/python/cpython/issues/100227
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
#ifndef Py_INTERNAL_GLOBAL_OBJECTS_H
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#define Py_INTERNAL_GLOBAL_OBJECTS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_gc.h" // PyGC_Head
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#include "pycore_global_strings.h" // struct _Py_global_strings
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#include "pycore_hamt.h" // PyHamtNode_Bitmap
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#include "pycore_context.h" // _PyContextTokenMissing
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#include "pycore_typeobject.h" // pytype_slotdef
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// These would be in pycore_long.h if it weren't for an include cycle.
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#define _PY_NSMALLPOSINTS 257
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#define _PY_NSMALLNEGINTS 5
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// Only immutable objects should be considered runtime-global.
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// All others must be per-interpreter.
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#define _Py_CACHED_OBJECT(NAME) \
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_PyRuntime.cached_objects.NAME
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struct _Py_cached_objects {
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PyObject *interned_strings;
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/* A thread state tied to the main interpreter,
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used exclusively for when a global object (e.g. interned strings)
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is resized (i.e. deallocated + allocated) from an arbitrary thread. */
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PyThreadState main_tstate;
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};
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#define _Py_GLOBAL_OBJECT(NAME) \
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_PyRuntime.static_objects.NAME
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#define _Py_SINGLETON(NAME) \
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_Py_GLOBAL_OBJECT(singletons.NAME)
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struct _Py_static_objects {
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struct {
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/* Small integers are preallocated in this array so that they
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* can be shared.
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* The integers that are preallocated are those in the range
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* -_PY_NSMALLNEGINTS (inclusive) to _PY_NSMALLPOSINTS (exclusive).
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*/
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PyLongObject small_ints[_PY_NSMALLNEGINTS + _PY_NSMALLPOSINTS];
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PyBytesObject bytes_empty;
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struct {
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PyBytesObject ob;
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char eos;
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} bytes_characters[256];
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struct _Py_global_strings strings;
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_PyGC_Head_UNUSED _tuple_empty_gc_not_used;
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PyTupleObject tuple_empty;
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_PyGC_Head_UNUSED _hamt_bitmap_node_empty_gc_not_used;
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PyHamtNode_Bitmap hamt_bitmap_node_empty;
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_PyContextTokenMissing context_token_missing;
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} singletons;
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};
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#define _Py_INTERP_CACHED_OBJECT(interp, NAME) \
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(interp)->cached_objects.NAME
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struct _Py_interp_cached_objects {
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/* AST */
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PyObject *str_replace_inf;
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/* object.__reduce__ */
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PyObject *objreduce;
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PyObject *type_slots_pname;
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pytype_slotdef *type_slots_ptrs[MAX_EQUIV];
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};
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#define _Py_INTERP_STATIC_OBJECT(interp, NAME) \
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(interp)->static_objects.NAME
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#define _Py_INTERP_SINGLETON(interp, NAME) \
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_Py_INTERP_STATIC_OBJECT(interp, singletons.NAME)
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struct _Py_interp_static_objects {
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struct {
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int _not_used;
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// hamt_empty is here instead of global because of its weakreflist.
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_PyGC_Head_UNUSED _hamt_empty_gc_not_used;
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PyHamtObject hamt_empty;
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PyBaseExceptionObject last_resort_memory_error;
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} singletons;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_GLOBAL_OBJECTS_H */
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