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📁 mimalloc/
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📄 pycore_abstract.h
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📄 pycore_asdl.h
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📄 pycore_ast.h
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📄 pycore_complexobject.h
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📄 pycore_condvar.h
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📄 pycore_context.h
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📄 pycore_critical_section.h
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📄 pycore_emscripten_signal.h
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📄 pycore_exceptions.h
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📄 pycore_faulthandler.h
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📄 pycore_floatobject.h
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📄 pycore_function.h
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📄 pycore_gc.h
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📄 pycore_genobject.h
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📄 pycore_getopt.h
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📄 pycore_gil.h
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📄 pycore_global_objects.h
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📄 pycore_global_objects_fini_generated.h
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📄 pycore_initconfig.h
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📄 pycore_instruction_sequence.h
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📄 pycore_interp.h
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📄 pycore_list.h
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📄 pycore_lock.h
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📄 pycore_long.h
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📄 pycore_memoryobject.h
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📄 pycore_mimalloc.h
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📄 pycore_object.h
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📄 pycore_object_alloc.h
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📄 pycore_object_stack.h
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📄 pycore_object_state.h
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📄 pycore_obmalloc.h
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📄 pycore_obmalloc_init.h
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📄 pycore_opcode_metadata.h
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📄 pycore_opcode_utils.h
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📄 pycore_optimizer.h
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📄 pycore_parser.h
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📄 pycore_pyarena.h
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📄 pycore_pyatomic_ft_wrappers.h
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📄 pycore_pybuffer.h
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📄 pycore_pyhash.h
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📄 pycore_pylifecycle.h
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📄 pycore_pymath.h
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📄 pycore_pymem.h
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📄 pycore_pymem_init.h
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📄 pycore_pythonrun.h
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📄 pycore_pythread.h
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📄 pycore_qsbr.h
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📄 pycore_range.h
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📄 pycore_runtime.h
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📄 pycore_runtime_init.h
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📄 pycore_runtime_init_generated.h
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📄 pycore_semaphore.h
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📄 pycore_setobject.h
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📄 pycore_signal.h
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📄 pycore_sliceobject.h
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📄 pycore_stackref.h
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📄 pycore_strhex.h
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📄 pycore_structseq.h
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📄 pycore_time.h
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📄 pycore_tuple.h
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📄 pycore_typeobject.h
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📄 pycore_typevarobject.h
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📄 pycore_ucnhash.h
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📄 pycore_unicodeobject.h
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📄 pycore_unicodeobject_generated.h
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📄 pycore_uop_ids.h
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📄 pycore_uop_metadata.h
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📄 pycore_warnings.h
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📄 pycore_weakref.h
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EDITING: pycore_weakref.h
#ifndef Py_INTERNAL_WEAKREF_H #define Py_INTERNAL_WEAKREF_H #ifdef __cplusplus extern "C" { #endif #ifndef Py_BUILD_CORE # error "this header requires Py_BUILD_CORE define" #endif #include "pycore_critical_section.h" // Py_BEGIN_CRITICAL_SECTION() #include "pycore_lock.h" #include "pycore_object.h" // _Py_REF_IS_MERGED() #include "pycore_pyatomic_ft_wrappers.h" #ifdef Py_GIL_DISABLED #define WEAKREF_LIST_LOCK(obj) \ _PyInterpreterState_GET() \ ->weakref_locks[((uintptr_t)obj) % NUM_WEAKREF_LIST_LOCKS] // Lock using the referenced object #define LOCK_WEAKREFS(obj) \ PyMutex_LockFlags(&WEAKREF_LIST_LOCK(obj), _Py_LOCK_DONT_DETACH) #define UNLOCK_WEAKREFS(obj) PyMutex_Unlock(&WEAKREF_LIST_LOCK(obj)) // Lock using a weakref #define LOCK_WEAKREFS_FOR_WR(wr) \ PyMutex_LockFlags(wr->weakrefs_lock, _Py_LOCK_DONT_DETACH) #define UNLOCK_WEAKREFS_FOR_WR(wr) PyMutex_Unlock(wr->weakrefs_lock) #else #define LOCK_WEAKREFS(obj) #define UNLOCK_WEAKREFS(obj) #define LOCK_WEAKREFS_FOR_WR(wr) #define UNLOCK_WEAKREFS_FOR_WR(wr) #endif static inline int _is_dead(PyObject *obj) { // Explanation for the Py_REFCNT() check: when a weakref's target is part // of a long chain of deallocations which triggers the trashcan mechanism, // clearing the weakrefs can be delayed long after the target's refcount // has dropped to zero. In the meantime, code accessing the weakref will // be able to "see" the target object even though it is supposed to be // unreachable. See issue gh-60806. #if defined(Py_GIL_DISABLED) Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&obj->ob_ref_shared); return shared == _Py_REF_SHARED(0, _Py_REF_MERGED); #else return (Py_REFCNT(obj) == 0); #endif } static inline PyObject* _PyWeakref_GET_REF(PyObject *ref_obj) { assert(PyWeakref_Check(ref_obj)); PyWeakReference *ref = _Py_CAST(PyWeakReference*, ref_obj); PyObject *obj = FT_ATOMIC_LOAD_PTR(ref->wr_object); if (obj == Py_None) { // clear_weakref() was called return NULL; } LOCK_WEAKREFS(obj); #ifdef Py_GIL_DISABLED if (ref->wr_object == Py_None) { // clear_weakref() was called UNLOCK_WEAKREFS(obj); return NULL; } #endif if (_Py_TryIncref(obj)) { UNLOCK_WEAKREFS(obj); return obj; } UNLOCK_WEAKREFS(obj); return NULL; } static inline int _PyWeakref_IS_DEAD(PyObject *ref_obj) { assert(PyWeakref_Check(ref_obj)); int ret = 0; PyWeakReference *ref = _Py_CAST(PyWeakReference*, ref_obj); PyObject *obj = FT_ATOMIC_LOAD_PTR(ref->wr_object); if (obj == Py_None) { // clear_weakref() was called ret = 1; } else { LOCK_WEAKREFS(obj); // See _PyWeakref_GET_REF() for the rationale of this test #ifdef Py_GIL_DISABLED ret = (ref->wr_object == Py_None) || _is_dead(obj); #else ret = _is_dead(obj); #endif UNLOCK_WEAKREFS(obj); } return ret; } extern Py_ssize_t _PyWeakref_GetWeakrefCount(PyObject *obj); // Clear all the weak references to obj but leave their callbacks uncalled and // intact. extern void _PyWeakref_ClearWeakRefsNoCallbacks(PyObject *obj); PyAPI_FUNC(int) _PyWeakref_IsDead(PyObject *weakref); #ifdef __cplusplus } #endif #endif /* !Py_INTERNAL_WEAKREF_H */
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