8000 gh-109860: Use a New Thread State When Switching Interpreters, When Necessary by ericsnowcurrently · Pull Request #110245 · python/cpython · GitHub
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gh-109860: Use a New Thread State When Switching Interpreters, When Necessary #110245

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Merged
merged 13 commits into from
Oct 3, 2023
Merged

gh-109860: Use a New Thread State When Switching Interpreters, When Necessary #110245

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2117772
Add PyThreadState._whence.
ericsnowcurrently Sep 25, 2023
23828a3
Add an assert.
ericsnowcurrently Sep 25, 2023
b807906
Set up interp->_initial_thread for re-use.
ericsnowcurrently Sep 25, 2023
3e10a5c
Use a local PyThreadState in _PyInterpreterState_IDDecref().
ericsnowcurrently Sep 25, 2023
15e978a
Use a local PyThreadState in _xxsubinterpreters.
ericsnowcurrently Sep 26, 2023
0b60d6d
Throw away the initial thread state.
ericsnowcurrently Sep 26, 2023
781cb53
Use existing API.
ericsnowcurrently Sep 27, 2023
cd288b5
Release threading._main_thread._tstate_lock in _PyInterpreterState_Se…
ericsnowcurrently Sep 27, 2023
4afdf7b
Drop an assert (fork is messy).
ericsnowcurrently Sep 27, 2023
aba79e3
Add _PyInterpreterState_FailIfRunningMain().
ericsnowcurrently Sep 27, 2023
2c18554
Propagate "alraedy running" properly.
ericsnowcurrently Sep 27, 2023
845c2bd
Fix handling of no-memory in _sharedexception_bind().
ericsnowcurrently Sep 27, 2023
fec49b2
Fix some typos.
ericsnowcurrently Oct 2, 2023
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Add _PyInterpreterState_FailIfRunningMain().
  • Loading branch information
@ericsnowcurrently
ericsnowcurrently committed Oct 2, 2023
commit aba79e38e5694010498e875b2c6219b01e51e4f0
1 change: 1 addition & 0 deletions Include/internal/pycore_pystate.h
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Expand Up @@ -48,6 +48,7 @@ _Py_IsMainInterpreterFinalizing(PyInterpreterState *interp)
PyAPI_FUNC(int) _PyInterpreterState_SetRunningMain(PyInterpreterState *);
PyAPI_FUNC(void) _PyInterpreterState_SetNotRunningMain(PyInterpreterState *);
PyAPI_FUNC(int) _PyInterpreterState_IsRunningMain(PyInterpreterState *);
PyAPI_FUNC(int) _PyInterpreterState_FailIfRunningMain(PyInterpreterState *);


static inline const PyConfig *
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15 changes: 12 additions & 3 deletions Python/pystate.c
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5BCB
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Expand Up @@ -1094,9 +1094,7 @@ _PyInterpreterState_DeleteExceptMain(_PyRuntimeState *runtime)
int
_PyInterpreterState_SetRunningMain(PyInterpreterState *interp)
{
if (interp->threads.main != NULL) {
PyErr_SetString(PyExc_RuntimeError,
"interpreter already running");
if (_PyInterpreterState_FailIfRunningMain(interp) < 0) {
return -1;
}
PyThreadState *tstate = current_fast_get(&_PyRuntime);
Expand Down Expand Up @@ -1136,6 +1134,17 @@ _PyInterpreterState_IsRunningMain(PyInterpreterState *interp)
return (interp->threads.main != NULL);
}

int
_PyInterpreterState_FailIfRunningMain(PyInterpreterState *interp)
{
if (interp->threads.main != NULL) {
PyErr_SetString(PyExc_RuntimeError,
"interpreter already running");
return -1;
}
return 0;
}


//----------
// accessors
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0