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bpo-39984: Move pending calls to PyInterpreterState (GH-19066)

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If Py_AddPendingCall() is called in a subinterpreter, the function is
now scheduled to be called from the subinterpreter, rather than being
called from the main interpreter.

Each subinterpreter now has its own list of scheduled calls.

* Move pending and eval_breaker fields from _PyRuntimeState.ceval
  to PyInterpreterState.ceval.
* new_interpreter() now calls _PyEval_InitThreads() to create
  pending calls lock.
* Fix Py_AddPendingCall() for subinterpreters. It now calls
  _PyThreadState_GET() which works in a subinterpreter if the
  caller holds the GIL, and only falls back on
  PyGILState_GetThisThreadState() if _PyThreadState_GET()
  returns NULL.
This commit is contained in:
Victor Stinner 2020-03-19 02:41:21 +01:00 • committed by GitHub
parent 3cde88439d
commit 50e6e99178
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8 changed files with 128 additions and 83 deletions
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8
Python/pylifecycle.c
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@ -556,7 +556,7 @@ pycore_create_interpreter(_PyRuntimeState *runtime,
return status;
}
/* Create the GIL */
/* Create the GIL and the pending calls lock */
status = _PyEval_InitThreads(tstate);
if (_PyStatus_EXCEPTION(status)) {
return status;
@ -1581,6 +1581,12 @@ new_interpreter(PyThreadState **tstate_p)
goto error;
}
/* Create the pending calls lock */
status = _PyEval_InitThreads(tstate);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
*tstate_p = tstate;
return _PyStatus_OK();