shell bypass 403
#ifndef Py_INTERNAL_BRC_H
#define Py_INTERNAL_BRC_H
#include <stdint.h>
#include "pycore_llist.h" // struct llist_node
#include "pycore_lock.h" // PyMutex
#include "pycore_object_stack.h" // _PyObjectStack
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
#ifdef Py_GIL_DISABLED
// Prime number to avoid correlations with memory addresses.
#define _Py_BRC_NUM_BUCKETS 257
// Hash table bucket
struct _brc_bucket {
// Mutex protects both the bucket and thread state queues in this bucket.
PyMutex mutex;
// Linked list of _PyThreadStateImpl objects hashed to this bucket.
struct llist_node root;
};
// Per-interpreter biased reference counting state
struct _brc_state {
// Hash table of thread states by thread-id. Thread states within a bucket
// are chained using a doubly-linked list.
struct _brc_bucket table[_Py_BRC_NUM_BUCKETS];
};
// Per-thread biased reference counting state
struct _brc_thread_state {
// Linked-list of thread states per hash bucket
struct llist_node bucket_node;
// Thread-id as determined by _PyThread_Id()
uintptr_t tid;
// Objects with refcounts to be merged (protected by bucket mutex)
_PyObjectStack objects_to_merge;
// Local stack of objects to be merged (not accessed by other threads)
_PyObjectStack local_objects_to_merge;
};
// Initialize/finalize the per-thread biased reference counting state
void _Py_brc_init_thread(PyThreadState *tstate);
void _Py_brc_remove_thread(PyThreadState *tstate);
// Initialize per-interpreter state
void _Py_brc_init_state(PyInterpreterState *interp);
void _Py_brc_after_fork(PyInterpreterState *interp);
// Enqueues an object to be merged by it's owning thread (tid). This
// steals a reference to the object.
void _Py_brc_queue_object(PyObject *ob);
// Merge the refcounts of queued objects for the current thread.
void _Py_brc_merge_refcounts(PyThreadState *tstate);
#endif /* Py_GIL_DISABLED */
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_BRC_H */