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gh-99113: Add PyInterpreterConfig.own_gil (gh-104204)

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We also add PyInterpreterState.ceval.own_gil to record if the interpreter actually has its own GIL.

Note that for now we don't actually respect own_gil; all interpreters still share the one GIL.  However, PyInterpreterState.ceval.own_gil does reflect PyInterpreterConfig.own_gil.  That lie is a temporary one that we will fix when the GIL really becomes per-interpreter.
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Eric Snow 2023-05-05 15:59:20 -06:00 • committed by GitHub
parent 66558d2a16
commit f3e7eb48f8
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11 changed files with 79 additions and 18 deletions
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23
Python/ceval_gil.c
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@ -500,9 +500,18 @@ PyEval_ThreadsInitialized(void)
}
PyStatus
_PyEval_InitGIL(PyThreadState *tstate)
_PyEval_InitGIL(PyThreadState *tstate, int own_gil)
{
assert(tstate->interp->ceval.gil == NULL);
if (!own_gil) {
PyInterpreterState *main_interp = _PyInterpreterState_Main();
assert(tstate->interp != main_interp);
struct _gil_runtime_state *gil = main_interp->ceval.gil;
assert(gil_created(gil));
tstate->interp->ceval.gil = gil;
tstate->interp->ceval.own_gil = 0;
return _PyStatus_OK();
}
/* XXX per-interpreter GIL */
struct _gil_runtime_state *gil = &tstate->interp->runtime->ceval.gil;
@ -512,8 +521,11 @@ _PyEval_InitGIL(PyThreadState *tstate)
and destroy it. */
assert(gil_created(gil));
tstate->interp->ceval.gil = gil;
// XXX For now we lie.
tstate->interp->ceval.own_gil = 1;
return _PyStatus_OK();
}
assert(own_gil);
assert(!gil_created(gil));
@ -521,6 +533,7 @@ _PyEval_InitGIL(PyThreadState *tstate)
create_gil(gil);
assert(gil_created(gil));
tstate->interp->ceval.gil = gil;
tstate->interp->ceval.own_gil = 1;
take_gil(tstate);
return _PyStatus_OK();
}
@ -530,6 +543,14 @@ _PyEval_FiniGIL(PyInterpreterState *interp)
{
if (interp->ceval.gil == NULL) {
/* It was already finalized (or hasn't been initialized yet). */
assert(!interp->ceval.own_gil);
return;
}
else if (!interp->ceval.own_gil) {
PyInterpreterState *main_interp = _PyInterpreterState_Main();
assert(interp != main_interp);
assert(interp->ceval.gil == main_interp->ceval.gil);
interp->ceval.gil = NULL;
return;
}