Fix compilation with CPython 3.12a6

CPython 3.12a6 made PyThreadState an opaque structure thus the fast thread state optimization cannot be employed anymore. Fixes cython#5286.
dnicolodi · Mar 27, 2023 · 03ae300 · 03ae300
1 parent 79b0451
commit 03ae300
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/Cython/Utility/ModuleSetupCode.c b/Cython/Utility/ModuleSetupCode.c
@@ -331,7 +331,8 @@
  #define CYTHON_UNPACK_METHODS 1
  #endif
  #ifndef CYTHON_FAST_THREAD_STATE
- #define CYTHON_FAST_THREAD_STATE 1
+ // CPython 3.12a6 made PyThreadState an opaque struct.
+ #define CYTHON_FAST_THREAD_STATE (PY_VERSION_HEX < 0x030C00A6)
  #endif
  #ifndef CYTHON_FAST_GIL
  // Py3<3.5.2 does not support _PyThreadState_UncheckedGet().