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8297d50a63
In free-threaded builds, concurrent calls to PyDict_AddWatcher, PyDict_ClearWatcher, PyDict_Watch, and PyDict_Unwatch can race on the shared callback array and the per-dict watcher tags. This change adds a mutex to serialize watcher registration and removal, atomic operations for tag updates, and atomic acquire/release synchronization for callback dispatch in _PyDict_SendEvent.
(cherry picked from commit 8a4895985f)
Co-authored-by: Alper <alperyoney@fb.com>
30 lines
677 B
C
30 lines
677 B
C
#ifndef Py_INTERNAL_DICT_STATE_H
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#define Py_INTERNAL_DICT_STATE_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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#define DICT_MAX_WATCHERS 8
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#define DICT_WATCHED_MUTATION_BITS 4
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struct _Py_dict_state {
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uint32_t next_keys_version;
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PyMutex watcher_mutex; // Protects the watchers array (free-threaded builds)
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_PyOnceFlag watcher_setup_once; // One-time optimizer watcher setup
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PyDict_WatchCallback watchers[DICT_MAX_WATCHERS];
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};
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#define _dict_state_INIT \
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{ \
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.next_keys_version = 2, \
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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_DICT_STATE_H */
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