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bpo-38858: Add _Py_IsMainInterpreter(tstate) #17293

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Merged
merged 1 commit into from
Nov 20, 2019
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bpo-38858: Add _Py_IsMainInterpreter(tstate) #17293

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2 changes: 2 additions & 0 deletions Include/internal/pycore_pystate.h
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Original file line number Diff line number Diff line change
Expand Up @@ -269,6 +269,8 @@ PyAPI_FUNC(void) _PyRuntime_Finalize(void);
#define _Py_CURRENTLY_FINALIZING(runtime, tstate) \
(runtime->finalizing == tstate)

PyAPI_FUNC(int) _Py_IsMainInterpreter(PyThreadState* tstate);


/* Variable and macro for in-line access to current thread
and interpreter state */
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6 changes: 3 additions & 3 deletions Modules/_threadmodule.c
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Expand Up @@ -1466,9 +1466,9 @@ static PyObject *
_thread__is_main_interpreter_impl(PyObject *module)
/*[clinic end generated code: output=7dd82e1728339adc input=cc1eb00fd4598915]*/
{
_PyRuntimeState *runtime = &_PyRuntime;
PyInterpreterState *interp = _PyRuntimeState_GetThreadState(runtime)->interp;
return PyBool_FromLong(interp == runtime->interpreters.main);
PyThreadState *tstate = _PyThreadState_GET();
int is_main = _Py_IsMainInterpreter(tstate);
return PyBool_FromLong(is_main);
}

static PyMethodDef thread_methods[] = {
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6 changes: 6 additions & 0 deletions Python/pystate.c
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Expand Up @@ -159,6 +159,12 @@ _PyRuntimeState_ReInitThreads(_PyRuntimeState *runtime)
#define HEAD_UNLOCK(runtime) \
PyThread_release_lock((runtime)->interpreters.mutex)

int
_Py_IsMainInterpreter(PyThreadState* tstate)
{
return (tstate->interp == tstate->interp->runtime->interpreters.main);
}

/* Forward declaration */
static void _PyGILState_NoteThreadState(
struct _gilstate_runtime_state *gilstate, PyThreadState* tstate);
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