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ðŸ“„ pycore_abstract.h(1.87 KB)
ðŸ“„ pycore_asdl.h(2.96 KB)
ðŸ“„ pycore_ast.h(30.78 KB)
ðŸ“„ pycore_ast_state.h(6.62 KB)
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ðŸ“„ pycore_blocks_output_buffer.h(8.57 KB)
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ðŸ“„ pycore_bytes_methods.h(3.84 KB)
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ðŸ“„ pycore_capsule.h(397 B)
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ðŸ“„ pycore_context.h(1.15 KB)
ðŸ“„ pycore_critical_section.h(7.78 KB)
ðŸ“„ pycore_crossinterp.h(11.84 KB)
ðŸ“„ pycore_descrobject.h(543 B)
ðŸ“„ pycore_dict.h(11.98 KB)
ðŸ“„ pycore_dict_state.h(732 B)
ðŸ“„ pycore_dtoa.h(1.69 KB)
ðŸ“„ pycore_emscripten_signal.h(685 B)
ðŸ“„ pycore_emscripten_trampoline.h(3.11 KB)
ðŸ“„ pycore_exceptions.h(900 B)
ðŸ“„ pycore_faulthandler.h(2.19 KB)
ðŸ“„ pycore_fileutils.h(9.25 KB)
ðŸ“„ pycore_fileutils_windows.h(2.65 KB)
ðŸ“„ pycore_floatobject.h(1.46 KB)
ðŸ“„ pycore_flowgraph.h(1.45 KB)
ðŸ“„ pycore_format.h(480 B)
ðŸ“„ pycore_frame.h(10.62 KB)
ðŸ“„ pycore_freelist.h(4.7 KB)
ðŸ“„ pycore_function.h(1.5 KB)
ðŸ“„ pycore_gc.h(12.66 KB)
ðŸ“„ pycore_genobject.h(859 B)
ðŸ“„ pycore_getopt.h(490 B)
ðŸ“„ pycore_gil.h(2.14 KB)
ðŸ“„ pycore_global_objects.h(3.02 KB)
ðŸ“„ pycore_global_objects_fini_generated.h(115.04 KB)
ðŸ“„ pycore_global_strings.h(26.08 KB)
ðŸ“„ pycore_hamt.h(3.65 KB)
ðŸ“„ pycore_hashtable.h(4.26 KB)
ðŸ“„ pycore_identifier.h(515 B)
ðŸ“„ pycore_import.h(7.55 KB)
ðŸ“„ pycore_importdl.h(3.96 KB)
ðŸ“„ pycore_initconfig.h(6.23 KB)
ðŸ“„ pycore_instruction_sequence.h(2.11 KB)
ðŸ“„ pycore_instruments.h(2.28 KB)
ðŸ“„ pycore_interp.h(14.71 KB)
ðŸ“„ pycore_intrinsics.h(1.71 KB)
ðŸ“„ pycore_jit.h(527 B)
ðŸ“„ pycore_list.h(1.82 KB)
ðŸ“„ pycore_llist.h(2.36 KB)
ðŸ“„ pycore_lock.h(8.34 KB)
ðŸ“„ pycore_long.h(9.73 KB)
ðŸ“„ pycore_memoryobject.h(427 B)
ðŸ“„ pycore_mimalloc.h(1.6 KB)
ðŸ“„ pycore_modsupport.h(3.27 KB)
ðŸ“„ pycore_moduleobject.h(1.54 KB)
ðŸ“„ pycore_namespace.h(435 B)
ðŸ“„ pycore_object.h(26.64 KB)
ðŸ“„ pycore_object_alloc.h(2.13 KB)
ðŸ“„ pycore_object_stack.h(2.33 KB)
ðŸ“„ pycore_object_state.h(942 B)
ðŸ“„ pycore_obmalloc.h(26.78 KB)
ðŸ“„ pycore_obmalloc_init.h(1.89 KB)
ðŸ“„ pycore_opcode_metadata.h(82.74 KB)
ðŸ“„ pycore_opcode_utils.h(2.07 KB)
ðŸ“„ pycore_optimizer.h(8.11 KB)
ðŸ“„ pycore_parking_lot.h(3.27 KB)
ðŸ“„ pycore_parser.h(2.04 KB)
ðŸ“„ pycore_pathconfig.h(658 B)
ðŸ“„ pycore_pyarena.h(2.79 KB)
ðŸ“„ pycore_pyatomic_ft_wrappers.h(7.87 KB)
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ðŸ“„ pycore_pyerrors.h(4.84 KB)
ðŸ“„ pycore_pyhash.h(2.75 KB)
ðŸ“„ pycore_pylifecycle.h(4.36 KB)
ðŸ“„ pycore_pymath.h(8.4 KB)
ðŸ“„ pycore_pymem.h(4.37 KB)
ðŸ“„ pycore_pymem_init.h(3.44 KB)
ðŸ“„ pycore_pystate.h(9.73 KB)
ðŸ“„ pycore_pystats.h(420 B)
ðŸ“„ pycore_pythonrun.h(758 B)
ðŸ“„ pycore_pythread.h(5.3 KB)
ðŸ“„ pycore_qsbr.h(4.81 KB)
ðŸ“„ pycore_range.h(346 B)
ðŸ“„ pycore_runtime.h(12.84 KB)
ðŸ“„ pycore_runtime_init.h(12.74 KB)
ðŸ“„ pycore_runtime_init_generated.h(45.72 KB)
ðŸ“„ pycore_semaphore.h(1.69 KB)
ðŸ“„ pycore_setobject.h(951 B)
ðŸ“„ pycore_signal.h(2.86 KB)
ðŸ“„ pycore_sliceobject.h(369 B)
ðŸ“„ pycore_stackref.h(5.06 KB)
ðŸ“„ pycore_strhex.h(1013 B)
ðŸ“„ pycore_structseq.h(963 B)
ðŸ“„ pycore_symtable.h(8.47 KB)
ðŸ“„ pycore_sysmodule.h(1.15 KB)
ðŸ“„ pycore_time.h(11.52 KB)
ðŸ“„ pycore_token.h(2.93 KB)
ðŸ“„ pycore_traceback.h(3.54 KB)
ðŸ“„ pycore_tracemalloc.h(4.43 KB)
ðŸ“„ pycore_tstate.h(1.32 KB)
ðŸ“„ pycore_tuple.h(820 B)
ðŸ“„ pycore_typeobject.h(8.67 KB)
ðŸ“„ pycore_typevarobject.h(924 B)
ðŸ“„ pycore_ucnhash.h(958 B)
ðŸ“„ pycore_unicodeobject.h(12.15 KB)
ðŸ“„ pycore_unicodeobject_generated.h(129.04 KB)
ðŸ“„ pycore_unionobject.h(742 B)
ðŸ“„ pycore_uop_ids.h(10.03 KB)
ðŸ“„ pycore_uop_metadata.h(38.54 KB)
ðŸ“„ pycore_warnings.h(840 B)
ðŸ“„ pycore_weakref.h(3.25 KB)

Editing: pycore_parking_lot.h

// ParkingLot is an internal API for building efficient synchronization
// primitives like mutexes and events.
//
// The API and name is inspired by WebKit's WTF::ParkingLot, which in turn
// is inspired Linux's futex API.
// See https://webkit.org/blog/6161/locking-in-webkit/.
//
// The core functionality is an atomic "compare-and-sleep" operation along with
// an atomic "wake-up" operation.

#ifndef Py_INTERNAL_PARKING_LOT_H
#define Py_INTERNAL_PARKING_LOT_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

enum {
    // The thread was unparked by another thread.
    Py_PARK_OK = 0,

// The value of `address` did not match `expected`.
    Py_PARK_AGAIN = -1,

// The thread was unparked due to a timeout.
    Py_PARK_TIMEOUT = -2,

// The thread was interrupted by a signal.
    Py_PARK_INTR = -3,
};

// Checks that `*address == *expected` and puts the thread to sleep until an
// unpark operation is called on the same `address`. Otherwise, the function
// returns `Py_PARK_AGAIN`. The comparison behaves like memcmp, but is
// performed atomically with respect to unpark operations.
//
// The `address_size` argument is the size of the data pointed to by the
// `address` and `expected` pointers (i.e., sizeof(*address)). It must be
// 1, 2, 4, or 8.
//
// The `timeout_ns` argument specifies the maximum amount of time to wait, with
// -1 indicating an infinite wait.
//
// `park_arg`, which can be NULL, is passed to the unpark operation.
//
// If `detach` is true, then the thread will detach/release the GIL while
// waiting.
//
// Example usage:
//
//  if (_Py_atomic_compare_exchange_uint8(address, &expected, new_value)) {
//    int res = _PyParkingLot_Park(address, &new_value, sizeof(*address),
//                                 timeout_ns, NULL, 1);
//    ...
//  }
PyAPI_FUNC(int)
_PyParkingLot_Park(const void *address, const void *expected,
                   size_t address_size, PyTime_t timeout_ns,
                   void *park_arg, int detach);

// Callback for _PyParkingLot_Unpark:
//
// `arg` is the data of the same name provided to the _PyParkingLot_Unpark()
//      call.
// `park_arg` is the data provided to _PyParkingLot_Park() call or NULL if
//      no waiting thread was found.
// `has_more_waiters` is true if there are more threads waiting on the same
//      address. May be true in cases where threads are waiting on a different
//      address that map to the same internal bucket.
typedef void _Py_unpark_fn_t(void *arg, void *park_arg, int has_more_waiters);

// Unparks a single thread waiting on `address`.
//
// Note that fn() is called regardless of whether a thread was unparked. If
// no threads are waiting on `address` then the `park_arg` argument to fn()
// will be NULL.
//
// Example usage:
//  void callback(void *arg, void *park_arg, int has_more_waiters);
//  _PyParkingLot_Unpark(address, &callback, arg);
PyAPI_FUNC(void)
_PyParkingLot_Unpark(const void *address, _Py_unpark_fn_t *fn, void *arg);

// Unparks all threads waiting on `address`.
PyAPI_FUNC(void) _PyParkingLot_UnparkAll(const void *address);

// Resets the parking lot state after a fork. Forgets all parked threads.
PyAPI_FUNC(void) _PyParkingLot_AfterFork(void);

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_PARKING_LOT_H */

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