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bpo-39877: _PyRuntimeState.finalizing becomes atomic (GH-18816)

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Convert _PyRuntimeState.finalizing field to an atomic variable:

* Rename it to _finalizing
* Change its type to _Py_atomic_address
* Add _PyRuntimeState_GetFinalizing() and _PyRuntimeState_SetFinalizing()
  functions
* Remove _Py_CURRENTLY_FINALIZING() function: replace it with testing
  directly _PyRuntimeState_GetFinalizing() value

Convert _PyRuntimeState_GetThreadState() to static inline function.
This commit is contained in:
Victor Stinner 2020-03-07 00:24:23 +01:00 • committed by GitHub
parent 557287075c
commit 7b3c252dc7
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5 changed files with 29 additions and 15 deletions
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Python/ceval.c
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@ -240,7 +240,8 @@ exit_thread_if_finalizing(PyThreadState *tstate)
{
_PyRuntimeState *runtime = tstate->interp->runtime;
/* _Py_Finalizing is protected by the GIL */
if (runtime->finalizing != NULL && !_Py_CURRENTLY_FINALIZING(runtime, tstate)) {
PyThreadState *finalizing = _PyRuntimeState_GetFinalizing(runtime);
if (finalizing != NULL && finalizing != tstate) {
drop_gil(&runtime->ceval, tstate);
PyThread_exit_thread();
}